@phdthesis{Pecenka, author = {Pecenka, Ralf}, title = {Optimieren der Reinigung von Hanffasern auf Kammsch{\"u}tteln}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-5879}, language = {de} } @misc{AyKennAlter, author = {Ay, Peter and Kenn, Barbara and Alter, Marcus Daniel}, title = {Strukturierte Filterelemente als Tr{\"a}germaterial f{\"u}r Mikroorganismen in der Wasseraufbereitung am Beispiel der Denitrifikation von belastetem Grund- und Trinkwasser}, series = {Forum der Forschung}, volume = {8}, journal = {Forum der Forschung}, number = {15}, issn = {0947-6989}, pages = {76 -- 81}, language = {de} } @phdthesis{Nagel, author = {Nagel, Manfred}, title = {Zur inneren Morphogenese von Flocken mittels Clusteranalyse}, language = {de} } @phdthesis{Pritzkow, author = {Pritzkow, Olaf}, title = {Untersuchungen zum Um- und Durchstr{\"o}mungsverhalten von einzelnen Agglomeratstrukturen}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-187}, language = {de} } @phdthesis{Baehr, author = {B{\"a}hr, Susanne}, title = {Experimentelle Untersuchungen zu Grundprozessen der Pelletierungsflockung}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-345}, language = {de} } @phdthesis{Hildebrandt, author = {Hildebrandt, Sven}, title = {Agglomeration von Fasermaterialien - Prozess und anlagentechnische Untersuchungen der angepassten Faseragglomeration sowie deren Produktcharakterisierung}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-7911}, language = {de} } @misc{NarraAyGlaser, author = {Narra, Satyanarayana and Ay, Peter and Glaser, Claudia}, title = {Vorrichtung und Verfahren zur Agglomeration der Ablauge eines Cellulosegewinnungsprozesses}, language = {de} } @misc{NarraAy, author = {Narra, Satyanarayana and Ay, Peter}, title = {Verfahren zur Herstellung von s{\"a}urebest{\"a}ndigen Biopolymer-Lignin-Membranen}, language = {de} } @misc{NarraAyGlaseretal., author = {Narra, Satyanarayana and Ay, Peter and Glaser, Claudia and Logsch, Florian}, title = {Verfahren zur Herstellung von wasserunl{\"o}slichen Lignin-Agglomeraten}, language = {de} } @misc{OyegbileNarra, author = {Oyegbile, Benjamin and Narra, Satyanarayana}, title = {The roles of emerging environmental contaminants in future impact assessments of wastewater treatment plants in Europe}, series = {Journal of the Polish Mineral Engineering Society}, journal = {Journal of the Polish Mineral Engineering Society}, number = {2}, issn = {1640-4920}, pages = {85 -- 90}, language = {en} } @misc{OyegbileNarra, author = {Oyegbile, Benjamin and Narra, Satyanarayana}, title = {Impending natural gas supply glut and biogas developments in Europe: Economic and environmental implications}, series = {Journal of Environment and Earth Science}, volume = {2}, journal = {Journal of Environment and Earth Science}, number = {11}, issn = {2224-3216}, pages = {1 -- 7}, language = {en} } @inproceedings{NarraDasguptaAyetal., author = {Narra, Satyanarayana and Dasgupta, Sunanda and Ay, Peter and Zeng, T. and Weller, N.}, title = {Pelletisation of Rye- and Wheat straw with additives}, series = {19th European Biomass Conference and Exhibition, proceedings, ICC Berlin International Congress Center Berlin, Germany, conference 6 - 10 June 2011}, booktitle = {19th European Biomass Conference and Exhibition, proceedings, ICC Berlin International Congress Center Berlin, Germany, conference 6 - 10 June 2011}, publisher = {ETA-Florence Renewable Energies}, address = {Florence}, isbn = {978-88-89407-55-7}, language = {en} } @inproceedings{KarthikeyanAyNarra, author = {Karthikeyan, J. and Ay, Peter and Narra, Satyanarayana}, title = {Energy Production from Agricultural residues and Crop processing Wastes: Some Problems and Perspectives}, series = {International Conference on Green Power Generation: Vision 2020}, booktitle = {International Conference on Green Power Generation: Vision 2020}, doi = {10.13140/2.1.3330.8965}, pages = {9}, language = {en} } @inproceedings{MarkowskiNarraAyetal., author = {Markowski, Jens and Narra, Satyanarayana and Ay, Peter and Pempel, Harry and M{\"u}ller, Mike}, title = {Automatic disassembly and recycling of lithium-traction-accumulators}, series = {Proceedings, XXVII. IMPC, Santiago de Chile, 2014}, booktitle = {Proceedings, XXVII. IMPC, Santiago de Chile, 2014}, publisher = {GECAMIN}, address = {Santiago de Chile}, pages = {227 -- 236}, abstract = {Within the next few years major changes in mobility are expected. Increasing numbers of electric powered cars, electrobikes and E-Scooters define the transport sector. Recently lithium based traction batteries as storage medium have led into matrurity of series production combining high electrical efficiencies with low weights and compact dimensions. Due to the relatively young development with lithium batteries utilization, only few investigation were conducted regarding their recycling. Conventional battery recycling processes can not be applied due to differences in design and chemistry. So an automated disassembly and processing procedure for lithium traction batteries has been developed in the R/D-project "Li-WERT". Instead of complete smelting of the batteries without pretreatment, an automated disassembly and specific treatment of the material streams was realised, adjusted to the needs of the subsequent recovery technologies. A higher quality, with reduced expenses for the separation of fine-grained or fused material mixes, can be obtained for the individual components. The automated disassembly using an industrial robot significantly reduces dangers for the operating crew. The selective disassembly and beneficiation allows full recovery of the fractions. The batteries will be disassembled to cell level by the industrial robot. Anodes, cathodes, and separation layers are isolated and processed. The technology is designed, that no waste is generated for disposal. The pelletised cathode coating and the other separated metals (stainless steel, copper, aluminum) can be used in respective metallurgical plants. Circuit boards and plug contacts are also coveted secondary raw materials for reuse. The process is modular and offers high flexibility, e. g. for new battery types/ sizes by quick adjustment of the robot and tool change. Adaptation to other cathode materials (e. g. Li[FePO]) is possible. After finishing the R/D-project, a pilot plant for demontage was realised in 2013.}, language = {en} } @inproceedings{MarkowskiAyPempeletal., author = {Markowski, Jens and Ay, Peter and Pempel, Harry and M{\"u}ller, Mike}, title = {Entwicklung eines innovativen Verfahrens zur automatisierten Demontage und Auf-bereitung von Lithium-Ionen-Batterien aus Fahrzeugen}, series = {Recycling und Rohstoffe : Band 5}, booktitle = {Recycling und Rohstoffe : Band 5}, edition = {1. Auflage}, publisher = {TK Verlag Karl Thom{\´e}-Kozmiensky}, address = {Neuruppin}, isbn = {978-3-935317-82-5}, pages = {443 -- 456}, abstract = {Die automobile Antriebstechnik steht in den n{\"a}chsten Jahrzehnten vor tief greifenden Ver{\"a}n-derungen. Nachdem {\"u}ber 125 Jahre der Verbrennungsmotor die vorherrschende Antriebsart darstellte, basieren neue Entwicklungen auf Elektroantrieben oder auf der Kombination ver-schiedener Antriebsformen. Fahrzeuge mit elektrischen Antrieben haben mittlerweile den Status der Serienreife erreicht und werden perspektivisch zunehmend das Straßenbild be-stimmen. Mit der so genannten Lithium-Ionen-Traktionsbatterie wurde in den letzten Jahren ein Spei-chermedium zur Serienreife gef{\"u}hrt, welches einen hohen elektrischen Wirkungsgrad mit kompakten Maßen und geringem Eigengewicht vereinigt. Mit den auf der Nutzung von Li-thium-Akkumulatoren basierenden Antriebskonzepten kann ein entscheidender Schritt zur Umsetzung einer umfassenden Verbreitung der elektrischen Antriebstechnik im Bereich der individuellen Mobilit{\"a}t erfolgen.}, language = {de} } @misc{AyGlaserHildebrandtetal., author = {Ay, Peter and Glaser, Claudia and Hildebrandt, Sven and M{\"u}ller-Fehn, Siegfried}, title = {Verfahren und Vorrichtung zur Herstellung von kugelf{\"o}rmigen Fasermengen}, abstract = {Hauptanspruch: Verfahren zur Herstellung von kugelf{\"o}rmigen Gebilden aus Fasern, - indem das Fasermaterial portioniert wird, - die portionierte Menge von Fasern in einem horizontal und vertikal begrenzten kreisf{\"o}rmig ausgebildeten Rollraum auf einem konstanten Umlaufradius einem Rollprozess unterzogen wird, der durch unterschiedliche Relativbewegungen zueinander erzeugende Rotationen einzelner ebener kreisf{\"o}rmiger Bauteile charakterisiert ist und - nach Erreichen einer im Wesentlichen allseitig nahezu runden Form der portionierten Menge von Fasern diese als Rollagglomerat aus dem Rollprozess ausgetragen wird.}, language = {de} } @misc{KochAyPritzkowetal., author = {Koch, Roland and Ay, Peter and Pritzkow, Olaf and Preuß, Volker}, title = {Herstellung und Verwendung von agglomerierten Naturfasern zum Zweck der biochemischen Wasseraufbereitung}, language = {de} } @misc{AyBrandesKochetal., author = {Ay, Peter and Brandes, Verona and Koch, Roland and Walaszek, Wiktoria}, title = {Verfahren und Anordnung zur Herstellung von Pellets aus Eisenhydroxidschl{\"a}mmen sowie deren Verwendung}, language = {de} } @misc{NarraTaoGlaseretal., author = {Narra, Satyanarayana and Tao, Yonggui and Glaser, Claudia and Gusovius, Hans-J{\"o}rg and Ay, Peter}, title = {Increasing the calorific value of Rye straw pellets with biogenous and fossil additives}, series = {Energy and Fuels}, volume = {24}, journal = {Energy and Fuels}, number = {9}, issn = {0887-0624}, pages = {5228 -- 5234}, language = {en} } @misc{Narra, author = {Narra, Satyanarayana}, title = {Structural development of clay soil with the amendment of coal combustion by-product FGD gypsum in Lusatia Germany}, series = {International Journal of Soil Science}, volume = {5}, journal = {International Journal of Soil Science}, number = {2}, issn = {1816-4978}, pages = {62 -- 72}, language = {en} } @misc{Narra, author = {Narra, Satyanarayana}, title = {Modeling water-induced compaction of the Saalian glacial till in lower Lusatia}, series = {International Journal of Soil Science}, volume = {5}, journal = {International Journal of Soil Science}, number = {1}, issn = {1816-4978}, pages = {26 -- 33}, language = {en} } @misc{Narra, author = {Narra, Satyanarayana}, title = {Flue Gas Desulphurization Gypsum as a Soil Amendment in the Growth of Wild Rye and Poplar (Hybrid 275 and Weser 6) Clones in Lusatia, Germany}, series = {International Journal of Agricultural Research}, volume = {4}, journal = {International Journal of Agricultural Research}, number = {10}, pages = {297 -- 309}, language = {en} } @misc{Narra, author = {Narra, Satyanarayana}, title = {Influence of compaction curve modeling on void ratio and pre-consolidation stress}, series = {International Journal of Soil Science}, volume = {4}, journal = {International Journal of Soil Science}, number = {2}, issn = {1816-4978}, pages = {57 -- 66}, language = {en} } @incollection{NarraLogschGlaseretal., author = {Narra, Satyanarayana and Logsch, Florian and Glaser, Claudia and Ay, Peter and D{\"o}hling, Frank and Leistner, Diana and Strube, Dieter}, title = {LignoBioFuel : Entwicklung eines Verfahrens zur Herstellung von stofflich und energetisch nutzbaren Bioagglomeraten auf der Basis von Lignin}, series = {Effizient, umweltvertr{\"a}glich, dezentral - neue Konzepte f{\"u}r die Nutzung von biogenen Festbrennstoffen, Bd. 2}, booktitle = {Effizient, umweltvertr{\"a}glich, dezentral - neue Konzepte f{\"u}r die Nutzung von biogenen Festbrennstoffen, Bd. 2}, editor = {Thr{\"a}n, Daniela and Pfeiffer, Diana}, publisher = {DBFZ, Dt. Biomasseforschungszentrum}, address = {Leipzig}, pages = {85 -- 99}, language = {de} } @incollection{NarraLogschGlaseretal., author = {Narra, Satyanarayana and Logsch, Florian and Glaser, Claudia and Ay, Peter}, title = {Erzeugung von Bioagglomeraten auf der Basis ligninhaltiger Ablaugen der Papier- und Zellstoffindustrie}, series = {Effizient, umweltvertr{\"a}glich, dezentral - neue Konzepte f{\"u}r die Nutzung von biogenen Festbrennstoffen, Bd. 2}, booktitle = {Effizient, umweltvertr{\"a}glich, dezentral - neue Konzepte f{\"u}r die Nutzung von biogenen Festbrennstoffen, Bd. 2}, editor = {Thr{\"a}n, Daniela and Pfeiffer, Diana}, publisher = {DBFZ, Dt. Biomasseforschungszentrum}, address = {Leipzig}, pages = {247 -- 264}, language = {de} } @incollection{NarraAy, author = {Narra, Satyanarayana and Ay, Peter}, title = {Build-up granulation of lignin sludge's as innovative process improving its energy efficiency}, series = {Fuelling the future : advances in science \& technologies for every generation, transmission and storage}, booktitle = {Fuelling the future : advances in science \& technologies for every generation, transmission and storage}, editor = {Mendez-Vilas, A.}, publisher = {BrownWalker Press}, address = {Boca Faton, FL}, isbn = {978-1-61233-558-2}, pages = {9 -- 14}, language = {en} } @incollection{NarraGlaserGusoviusetal., author = {Narra, Satyanarayana and Glaser, Claudia and Gusovius, Hans-J{\"o}rg and Stollberg, Christian and Ay, Peter}, title = {Agricultural residues as a renewable source of bioenergy with special focus on cereal straws}, series = {Renewable resources and biotechnology for material applications}, booktitle = {Renewable resources and biotechnology for material applications}, editor = {Zaikov, Gennadij E. and Pudel, Frank and Spychalski, Grzegorz}, publisher = {Nova Publishers}, address = {Magdeburg}, isbn = {978-1-61209-521-9}, pages = {67 -- 79}, language = {en} } @incollection{Narra, author = {Narra, Satyanarayana}, title = {Bioenergy production: special emphasis on rice husks usage in India}, series = {Implementing Environmental and Resource Management}, booktitle = {Implementing Environmental and Resource Management}, editor = {Schmidt, Michael and Onyango, Vincent and Palekhov, Dmitry}, publisher = {Springer-Verlag}, address = {Berlin [u.a.]}, isbn = {978-3-540-77567-6}, pages = {15 -- 22}, language = {en} } @incollection{TukdeoNarra, author = {Tukdeo, Shrinivas and Narra, Satyanarayana}, title = {Wind Power Projects in India and Clean Development Mechanism (CDM) Approach}, series = {Implementing Environmental and Resource Management}, booktitle = {Implementing Environmental and Resource Management}, editor = {Schmidt, Michael and Onyango, Vincent and Palekhov, Dmitry}, publisher = {Springer-Verlag}, address = {Berlin [u.a.]}, isbn = {978-3-540-77567-6}, pages = {61 -- 68}, language = {en} } @misc{OyegbileAyNarra, author = {Oyegbile, Benjamin and Ay, Peter and Narra, Satyanarayana}, title = {Optimization of Physicochemical Process for Pre-treatment of Suspension by Flocculation Prior to Dewatering}, series = {Desalination and water treatment}, volume = {57}, journal = {Desalination and water treatment}, number = {6}, issn = {1944-3986}, doi = {10.1080/19443994.2015.1043591}, pages = {2726 -- 2736}, language = {en} } @inproceedings{NarraGruhnAy, author = {Narra, Satyanarayana and Gruhn, M. and Ay, Peter}, title = {Production of carbon fibres from technical lignin granules}, series = {21st European Biomass Conference and Exhibition, Copenhagen, Denmark, 3 - 7 June 2013}, booktitle = {21st European Biomass Conference and Exhibition, Copenhagen, Denmark, 3 - 7 June 2013}, publisher = {ETA-Florence Renewable Energies}, doi = {10.13140/RG.2.1.2139.0886}, language = {en} } @inproceedings{NarraAslanjanAy, author = {Narra, Satyanarayana and Aslanjan, Jana and Ay, Peter}, title = {Macroencapsulation of biogas residues increasing the fertilizer efficiency}, series = {21st European Biomass Conference and Exhibition, Copenhagen, Denmark, 3 - 7 June 2013}, booktitle = {21st European Biomass Conference and Exhibition, Copenhagen, Denmark, 3 - 7 June 2013}, publisher = {ETA-Florence Renewable Energies}, doi = {10.13140/RG.2.1.3187.6642}, language = {en} } @misc{AyGusoviusHildebrandt, author = {Ay, Peter and Gusovius, Hans-J{\"o}rg and Hildebrandt, Sven}, title = {Verfahren und Einrichtung zur Herstellung von pelletartigen K{\"o}rpern aus ungebundenen Fasern}, language = {de} } @misc{AyNarraGlaser, author = {Ay, Peter and Narra, Satyanarayana and Glaser, Claudia}, title = {Vorrichtung zur Herstellung von Agglomeraten}, abstract = {Die Erfindung betrifft eine Rollagglomerations-Vorrichtung zur Herstellung von Agglomeraten aus einem Feststoff-F{\"u}ssigkeitsgemisch. Die Vorrichtung weist ein Transportmittel zum Transport eines Feststoff-Fl{\"u}ssigkeitsgemisches in Richtung der L{\"a}ngsachse des Transportmittles und ein Pressmittel auf, welches so zum Transportmittel beabstandet angeordnet ist, dass ein Pressmittel auf das auf der Auflagefl{\"a}che des Transportmittels befindlichen Feststoff-Fl{\"u}ssigkeitsgemisches einen Druck aus{\"u}ben kann, wobei das Transportmittle oder das Pressmittel quer zur L{\"a}ngsachse des Transportmittels bewegbar sind.}, language = {de} } @misc{NarraGlaserAy, author = {Narra, Satyanarayana and Glaser, Claudia and Ay, Peter}, title = {Verfahren zur Herstellung von Langzeitd{\"u}nger aus G{\"a}rresten mittels Verkapselung}, abstract = {Die Erfindung betrifft ein Verfahren zur Herstellung von D{\"u}nger aus G{\"a}rresten, wobei die Inhaltsstoffe aus den enthaltenen Zubereitungen lang anhaltend freigesetzt werden.}, language = {de} } @misc{NarraGlaserAyetal., author = {Narra, Satyanarayana and Glaser, Claudia and Ay, Peter and Logsch, Florian}, title = {Verfahren zur Herstellung von wasserunl{\"o}slichen Lignin-Agglomeraten}, abstract = {Die Erfindung betrifft ein Verfahren zur Herstellung von wasserunl{\"o}slichen Agglomeraten aus Ablauge eines Cellulosegewinnungsprozesses. Erfindungsgem{\"a}ß umfasst das Verfahren die folgenden Schritte: 1. Durchf{\"u}hrung einer Granulation mit der Ablauge zur Erzeugung von Lignin-Agglomeraten und 2. Behandeln der erzeugten Lignin-Agglomerate mit einer S{\"a}ure.}, language = {de} } @techreport{SchlummerWagenknechtMarkowski, author = {Schlummer, Martin and Wagenknecht, Udo and Markowski, Jens}, title = {Verkehrsf{\"a}hige Polymer-Recyclate aus der Elektro(nik)altger{\"a}teverwertung durch spektroskopische Sortierung und dichtebasierte St{\"o}rstoffabtrennung}, publisher = {Fraunhofer IVV}, address = {Freising}, pages = {71}, abstract = {Schlussbericht Projekt SpectroDense}, language = {de} } @misc{AyGlaser, author = {Ay, Peter and Glaser, Claudia}, title = {Aufbereitung von Fetts{\"a}uregemischen aus nachwachsenden Rohstoffen}, series = {Forum der Forschung}, volume = {7}, journal = {Forum der Forschung}, number = {16}, issn = {0947-6989}, pages = {135 -- 142}, language = {de} } @misc{AyGusoviusPecenkaetal., author = {Ay, Peter and Gusovius, Hans-J{\"o}rg and Pecenka, Ralf and F{\"u}rll, Christian}, title = {Aufbereitung und Nutzung von Faserpflanzen}, series = {Forum der Forschung}, volume = {7}, journal = {Forum der Forschung}, number = {16}, issn = {0947-6989}, pages = {143 -- 148}, language = {de} } @phdthesis{Stollberg, author = {Stollberg, Christian}, title = {Entwicklung eines Verfahrens zur Aufbereitung komplexer Fahrzeugbaugruppen im Hinblick auf ein stoffliches Recycling von Kunststoffen aus automobilen Anwendungen}, edition = {1. Auflage}, publisher = {Cuvillier}, address = {G{\"o}ttingen}, isbn = {3-89873-967-8}, pages = {221}, language = {de} } @inproceedings{HildebrandtAyGusoviusetal., author = {Hildebrandt, Sven and Ay, Peter and Gusovius, Hans-J{\"o}rg and Glaser, Claudia and Stollberg, Christian}, title = {Possibilities and working of the specific agglomeration of fibrous materials and residues}, series = {XXV International Mineral Processing Congress, IMPC 2010, Brisbane, Australia 6-10 September 2010}, booktitle = {XXV International Mineral Processing Congress, IMPC 2010, Brisbane, Australia 6-10 September 2010}, publisher = {AusIMM}, address = {Carlton South, Australia}, language = {en} } @inproceedings{NarraGlaserBrinkeretal., author = {Narra, Satyanarayana and Glaser, Claudia and Brinker, Mona and Bednarek, R. and Gusovius, Hans-J{\"o}rg and Ay, Peter}, title = {Vergleich verschiedener Bildanalysesysteme zur Bestimmung der Partikelgr{\"o}ßenverteilung von zerkleinertem Stroh und deren charakteristischer Einfluss auf Stabilit{\"a}t und Festigkeit von Biomassepellets}, series = {Aufbereitung und Recycling, 10. und 11. November 2010, Freiberg, Jahrestagung der UVR e.V. und FIA e.v.}, booktitle = {Aufbereitung und Recycling, 10. und 11. November 2010, Freiberg, Jahrestagung der UVR e.V. und FIA e.v.}, address = {Freiberg}, pages = {S. 35}, language = {de} } @misc{StollbergPedaSmieszeketal., author = {Stollberg, Christian and Peda, Stefan and Smieszek, Marlene and Gerath, H. and Jurischka, Constantin and Ay, Peter}, title = {New Downstream approaches for highly pure substances and bio fine chemicals from plant materials}, series = {Agricultural Engineering : Research papers}, volume = {43}, journal = {Agricultural Engineering : Research papers}, number = {3}, issn = {1392-1134}, pages = {58 -- 66}, language = {en} } @incollection{SchmidtStollbergPempel, author = {Schmidt, M. and Stollberg, Christian and Pempel, Harry}, title = {Kunststoffrecycling auf hohem Niveau}, series = {Jahrbuch des Bundesministeriums f{\"u}r Bildung und Forschung 2004}, booktitle = {Jahrbuch des Bundesministeriums f{\"u}r Bildung und Forschung 2004}, pages = {S. 76}, language = {de} } @misc{AyBehnsenSchimke, author = {Ay, Peter and Behnsen, Petra and Schimke, Barbara}, title = {Denitrifikation von belastetem Grund- und Trinkwasser in mit Mikroorganismen immobilisierten speziell strukturierten Filterelementen}, series = {Chemie - Ingenieur - Technik}, volume = {68}, journal = {Chemie - Ingenieur - Technik}, number = {7}, issn = {1522-2640}, pages = {812 -- 815}, language = {de} } @misc{NagelAy, author = {Nagel, Manfred and Ay, Peter}, title = {Characterization of floc structure using cluster analysis}, series = {Particle and Particle Systems Characterization}, volume = {16}, journal = {Particle and Particle Systems Characterization}, number = {5}, issn = {1521-4117}, pages = {229 -- 237}, language = {en} } @inproceedings{GaydardzhievAy, author = {Gaydardzhiev, Stoyan and Ay, Peter}, title = {Implication of surface charge effects in colour removal from effluents by chemical coagulation in the case of CI Reactive Blue dye}, series = {Partec 2004, proceedings, N{\"u}rnberg, Germany 16 - 18 march 2004, International Congress for Particle Technology}, booktitle = {Partec 2004, proceedings, N{\"u}rnberg, Germany 16 - 18 march 2004, International Congress for Particle Technology}, editor = {Pratsinis, Sotiris E.}, publisher = {N{\"u}rnbergMesse-GmbH}, address = {N{\"u}rnberg}, language = {en} } @misc{StollbergPloetzReuscher, author = {Stollberg, Christian and Ploetz, Christiane and Reuscher, Guenter}, title = {Sortenreiner Kunststoff aus Alt-KFZ}, series = {Umweltmagazin}, volume = {35}, journal = {Umweltmagazin}, number = {3}, issn = {0173-363X}, pages = {38 -- 39}, language = {de} } @inproceedings{StollbergPempelSchwabeetal., author = {Stollberg, Christian and Pempel, Harry and Schwabe, M. and Ay, Peter}, title = {Qualit{\"a}tssicherung bei der automatischen R{\"u}ckgewinnung von Kunststoffen aus komplexen automobilen Anwendungen}, series = {TECHNOMER 2005, 19. Fachtagung {\"u}ber Verarbeitung und Anwendung von Polymeren, 10. - 12. November 2005, Chemnitz}, booktitle = {TECHNOMER 2005, 19. Fachtagung {\"u}ber Verarbeitung und Anwendung von Polymeren, 10. - 12. November 2005, Chemnitz}, publisher = {Techn. Univ.}, address = {Chemnitz}, language = {de} } @misc{WoldtGjardyHildebrandtetal., author = {Woldt, Thomas and Gjardy, Georg and Hildebrandt, Sven and Gr{\"u}newald, Holger and Stock, Oliver and Schneider, Bernd Uwe}, title = {Systemintegration dezentraler Energiewandlungsanlagen unter besonderer Ber{\"u}cksichtigung regenerativer Energietr{\"a}ger}, series = {Forum der Forschung}, journal = {Forum der Forschung}, number = {19}, issn = {0947-6989}, pages = {69 -- 74}, language = {de} } @inproceedings{NarraGlaserGusoviusetal., author = {Narra, Satyanarayana and Glaser, Claudia and Gusovius, Hans-J{\"o}rg and Stollberg, Christian and Ay, Peter}, title = {Agricultural residues as a renewable source of bio-Energy with special focus on cereal straws}, series = {Renewable resources and biotechnology for material applications, proceeding of the 16th International Conference for Renewable Resources and Plant Biotechnology (NAROSSA 2010), held in Magdeburg, Germany, June 7 - 8, 2010}, booktitle = {Renewable resources and biotechnology for material applications, proceeding of the 16th International Conference for Renewable Resources and Plant Biotechnology (NAROSSA 2010), held in Magdeburg, Germany, June 7 - 8, 2010}, editor = {Zaikov, Gennadij E.}, publisher = {Nova Science Publ.}, address = {New York}, isbn = {978-1-61209-521-9}, pages = {67 -- 80}, language = {en} } @inproceedings{NagelAy, author = {Nagel, Manfred and Ay, Peter}, title = {Verbesserung der Entw{\"a}sserungseigenschaften von Schl{\"a}mmen durch den gezielten Aufbau von Flockenstrukturen auf der Basis detaillierter morphologischer Analysen}, series = {Verfahrenstechnik der Abwasser- und Schlammbehandlung additive und prozeßintegrierte Maßnahmen, 4. GVC-Abwasser-Kongreß 1999, 6. - 8. September 1999, Congress Centrum Bremen, Preprints, Bd. 2}, booktitle = {Verfahrenstechnik der Abwasser- und Schlammbehandlung additive und prozeßintegrierte Maßnahmen, 4. GVC-Abwasser-Kongreß 1999, 6. - 8. September 1999, Congress Centrum Bremen, Preprints, Bd. 2}, publisher = {Fuck}, address = {Koblenz}, isbn = {3-9805032-7-5}, pages = {887 -- 892}, language = {de} } @inproceedings{NagelAy, author = {Nagel, Manfred and Ay, Peter}, title = {Three-dimensional Reconstruction of flocs growth history}, series = {Product engineering \& chemical engineering now, proceedings of 2nd European Congress of Chemical Engineering (ECCE 2), 5 - 7 October 1999, Monpellier, France}, booktitle = {Product engineering \& chemical engineering now, proceedings of 2nd European Congress of Chemical Engineering (ECCE 2), 5 - 7 October 1999, Monpellier, France}, publisher = {Technique et Documentation-Lavoisier}, address = {Cachan, France}, isbn = {2-910239-00-4}, pages = {361 -- 368}, language = {en} } @misc{AlterAy, author = {Alter, Marcus Daniel and Ay, Peter}, title = {Aufbereitung von Textilabw{\"a}ssern am Beispiel der Entf{\"a}rbung von Azofarbstoffen mittels Tr{\"a}gerbiologie}, series = {Forum der Forschung}, volume = {5}, journal = {Forum der Forschung}, number = {11}, issn = {0947-6989}, pages = {145 -- 151}, language = {de} } @misc{BaehrAy, author = {B{\"a}hr, Susanne and Ay, Peter}, title = {Konditionierung und Enw{\"a}sserung von industriellen und kommunalen Schl{\"a}mmen durch Pelletierungsflockung}, series = {Forum der Forschung}, volume = {5}, journal = {Forum der Forschung}, number = {11}, issn = {0947-6989}, pages = {139 -- 144}, language = {de} } @inproceedings{AyNagel, author = {Ay, Peter and Nagel, Manfred}, title = {A new concept for the process design of flocculation process}, series = {Proceedings of the XXI International Mineral Processing Congress, Rome, Italy, July 23 - 27, 2000}, booktitle = {Proceedings of the XXI International Mineral Processing Congress, Rome, Italy, July 23 - 27, 2000}, publisher = {Elsevier}, address = {Amsterdam [u.a.]}, language = {en} } @inproceedings{NagelAy, author = {Nagel, Manfred and Ay, Peter}, title = {Mathematical Desciption of the Morphological genesis of flocs, Cluster analysis of flocs}, series = {PARTEC 2001, International Congress for Particle Technology, N{\"u}rnberg, Germany, 27-29 March 2001}, booktitle = {PARTEC 2001, International Congress for Particle Technology, N{\"u}rnberg, Germany, 27-29 March 2001}, address = {N{\"u}rnberg}, language = {en} } @inproceedings{BaehrAy, author = {B{\"a}hr, Susanne and Ay, Peter}, title = {Pelleting flocculation in a rotary drum reactor}, series = {PARTEC 2001, International Congress for Particle Technology, Nuremberg, Germany, 27-29 March 2001}, booktitle = {PARTEC 2001, International Congress for Particle Technology, Nuremberg, Germany, 27-29 March 2001}, publisher = {N{\"u}rnberg}, language = {en} } @inproceedings{AyGaydardzhiev, author = {Ay, Peter and Gaydardzhiev, Stoyan}, title = {Removal of dyes from effluents by chemical coagulation: Surface charge and particle size aspects}, series = {Mineral Processing in the 21st Century, proceedings of the X Balkan Mineral Processing Congress, Varna, Bulgaria, June 15-20, 2003}, booktitle = {Mineral Processing in the 21st Century, proceedings of the X Balkan Mineral Processing Congress, Varna, Bulgaria, June 15-20, 2003}, address = {Sofia}, language = {en} } @inproceedings{StollbergNamangoSchmidtetal., author = {Stollberg, Christian and Namango, Saul and Schmidt, M. and Pohl, R. and Ay, Peter}, title = {Preparation of plastics for automatic identification as the first step in recycling of automotive parts}, series = {Proceedings of the XXII International Mineral Processing Congress, Cape Town, South Africa, 29 September - 3 October 2003}, booktitle = {Proceedings of the XXII International Mineral Processing Congress, Cape Town, South Africa, 29 September - 3 October 2003}, publisher = {South African Institute of Mining \& Meta}, address = {Marshalltown, South Africa}, language = {en} } @inproceedings{HildebrandtAyGusovius, author = {Hildebrandt, Sven and Ay, Peter and Gusovius, Hans-J{\"o}rg}, title = {M{\"o}glichkeiten und Wirkprinzipien der angepassten Agglomeration von Naturfasern f{\"u}r den Einsatz in naturfaserverst{\"a}rkten Kunststoffen}, series = {Internationales Symposium "Werkstoffe aus Nachwachsenden Rohstoffen", 01. + 02. September 2005, Messe Erfurt, Tagungsband}, booktitle = {Internationales Symposium "Werkstoffe aus Nachwachsenden Rohstoffen", 01. + 02. September 2005, Messe Erfurt, Tagungsband}, publisher = {Gesellschaft f{\"u}r Messe- und Veranstaltungsmanagement}, address = {Erfurt}, language = {de} } @inproceedings{HildebrandtAyGusovius, author = {Hildebrandt, Sven and Ay, Peter and Gusovius, Hans-J{\"o}rg}, title = {Erweiterte Einsatzm{\"o}glichkeiten f{\"u}r neuartige Faseragglomerate}, series = {Internationales Symposium "Werkstoffe aus Nachwachsenden Rohstoffen", 01. + 02. September 2005, Messe Erfurt, Tagungsband}, booktitle = {Internationales Symposium "Werkstoffe aus Nachwachsenden Rohstoffen", 01. + 02. September 2005, Messe Erfurt, Tagungsband}, publisher = {Gesellschaft f{\"u}r Messe- und Veranstaltungsmanagement}, address = {Erfurt}, language = {de} } @inproceedings{GaydardzhievAy, author = {Gaydardzhiev, Stoyan and Ay, Peter}, title = {Characterization of stability behaviour of ultra fine alumina powder in view its colloidal processing by gel-casting}, series = {Proceedings of the XXIII International Mineral Processing Congress, Istanbul, Turkey 3-8 September 2006, Vol. 1}, booktitle = {Proceedings of the XXIII International Mineral Processing Congress, Istanbul, Turkey 3-8 September 2006, Vol. 1}, editor = {{\"O}nal, G{\"u}ven}, publisher = {Promed Advertising Agency}, address = {Istanbul}, isbn = {975-7946-28-1}, pages = {464 -- 467}, language = {en} } @inproceedings{WalaszekAy, author = {Walaszek, Wiktoria and Ay, Peter}, title = {Pelleting flocculation as a tool to optimize slugde conditioning}, series = {Proceedings of the XXIII International Mineral Processing Congress,Istanbul, Turkey 3-8 September 2006, Vol. 2}, booktitle = {Proceedings of the XXIII International Mineral Processing Congress,Istanbul, Turkey 3-8 September 2006, Vol. 2}, editor = {{\"O}nal, G{\"u}ven}, publisher = {Promed Advertising Agency}, address = {Istanbul}, isbn = {975-7946-29-X}, pages = {1631 -- 1636}, language = {en} } @misc{SchlummerArendsMaeureretal., author = {Schlummer, Martin and Arends, Dagmar and M{\"a}urer, Andreas and Markowski, Jens and Wagenknecht, Udo}, title = {Characterisation and materials flow management for waste electrical and electronic equipment plastics from German dismantling centres}, series = {Waste Management \& Research}, volume = {33}, journal = {Waste Management \& Research}, number = {9}, issn = {1096-3669}, doi = {10.1177/0734242x15588585}, pages = {775 -- 784}, abstract = {Waste electrical and electronic equipment is a complex waste stream and treatment options that work for one waste category or product may not be appropriate for others. A comprehensive case study has been performed for plastic-rich fractions that are treated in German dismantling centres. Plastics from TVs, monitors and printers and small household appliances have been characterised extensively. Based on the characterisation results, state-of-the-art treatment technologies have been combined to design an optimised recycling and upgrade process for each input fraction. High-impact polystyrene from TV casings that complies with the European directive on the restriction of hazardous substances (RoHS) was produced by applying continuous density separation with yields of about 60\%. Valuable acrylonitrile butadiene styrene/ polycarbonate can be extracted from monitor and printer casings by near- infrared-based sorting. Polyolefins and/or a halogen-free fraction of mixed styrenics can be sorted out by density separation from monitors and printers and small household appliances. Emerging separation technologies are discussed to improve recycling results.}, language = {en} } @misc{DasguptaAyKommolketal., author = {Dasgupta, Sunanda and Ay, Peter and Kommolk, Ralf and Su, Xu}, title = {Kinetics of Melt Crystallization of a Sunflower Oil-Based Polyunsaturated Fatty Acid Mixture}, series = {Chemical Engineering \& Technology}, volume = {36}, journal = {Chemical Engineering \& Technology}, number = {7}, issn = {0930-7516}, doi = {10.1002/ceat.201200524}, pages = {1225 -- 1230}, abstract = {Important parameters like supercooling and cooling rates affecting the melt crys- tallization of a polyunsaturated fatty acid (PUFA) mixture obtained from sun- flower oil were investigated and compared via high-resolution polarized-light mi- croscopy. PUFA was thermally characterized in a differential scanning calorimeter and the significant liquid-solid-phase transition temperatures determined were then implemented in the development of specific temperature profiles. Analyzed between two glass slides, induction times were found to decrease with low crystal- lization temperatures and the number of nuclei per unit area increased with high- er supercooling and cooling rates. A comparison between the linear crystal growth rates of pure standards of each of the main fatty acids present in the PUFA mixture and the PUFA mixture itself indicated that the latter is much slower than that of each of its pure components.}, language = {en} } @misc{DasguptaAySchulz, author = {Dasgupta, Sunanda and Ay, Peter and Schulz, Stephanie}, title = {Determination and Comparison of Equilibrium Data of Various Plant-Based Fatty Acid Mixtures}, series = {Chemical Engineering \& Technology}, volume = {37}, journal = {Chemical Engineering \& Technology}, number = {6}, issn = {0930-7516}, doi = {10.1002/ceat.201300630}, pages = {1002 -- 1008}, abstract = {Multistage melt crystallization of a variety of plant-based polyunsaturated fatty acid (PUFA) mixtures was conducted to obtain an overview on their liquid-solid equilibrium behavior. Crystal fraction and mother liquor samples were analyzed at every stage. Phase behavior diagrams at low saturated fatty acid concentrations were investigated in detail as they are of significant technical relevance with respect to efficient depletion of the saturated content from the samples. A high oleic acid content in the PUFA mixtures led to difficulties in depleting the mother liquor from the saturated content by melt crystallization. Thermograms from the differential scanning calorimetry were supplemented with illustrations which allow a novel interpretation of results and verification of conclusions.}, language = {en} } @inproceedings{EckertDasguptaSelgeetal., author = {Eckert, Karl-Andreas and Dasgupta, Sunanda and Selge, Benjamin and Ay, Peter}, title = {Liquid solid phase behavior of ternary fatty acid systems of palmitic, stearic, oleic and linoleic acid}, series = {Book of Abstracts of the 8th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry Karlsruhe, March 29-31, 2015}, booktitle = {Book of Abstracts of the 8th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry Karlsruhe, March 29-31, 2015}, publisher = {abiosus e.V. Conferences}, address = {Karlsruhe, Germany}, pages = {S. 73}, abstract = {Enrichment of natural unsaturated fractions by melt crystallization processes has already been proved to be effective in prior investigations [1]-[3]. Palmitic, stearic, oleic, linoleic and linolenic acid are the five main fatty acids present in most of these plant based natural oils. There is quite a bit of information about the liquid solid phase behavior of binary mixtures such as palmitic-oleic, stearic-oleic and palmitic-stearic acid mixtures in literature [4]-[6]. Recent investigations have shown phase diagrams of real natural oil based fatty acid systems containing up to 19\% saturated content (11\% stearic acid and 8\% palmitic acid) [7]. Yet, there is hardly any information regarding ternary systems as those of palmitic-stearic-oleic and palmitic-stearic-linoleic acids. In this work, synthetic mixtures have been used in order to obtain a complete overview of the liquid solid phase diagrams of these ternary mixtures. To imitate naturally occurring mixtures, a mixture with 1:1 ratio of palmitic stearic acid was prepared. Varying amounts of either oleic or linoleic acids were added to this mixture in order to obtain the entire range required for the phase diagrams. These mixtures were then subjected to a specific profile with a wide temperature range in a Differential Scanning Calorimeter (DSC) so as to record every phase transition. This study successfully concludes that these complex mixtures could be treated as binary mixtures of their saturated and unsaturated contents. This is because there were essentially two main peaks noted in the DSC thermograms. It is to be noted that there was a third peak, assumed to represent the solid transition, in mixtures containing oleic acid. This has already been shown in detail and discussed in prior investigations [6], [7]. Another major discovery was that the solidus line depends on the type of the unsaturated content, that is, the degree of unsaturation, in the mixture.}, language = {en} } @inproceedings{EckertDasguptaAy, author = {Eckert, Karl-Andreas and Dasgupta, Sunanda and Ay, Peter}, title = {Novel techniques to optically characterize melt crystallization kinetics of high oleic sunflower oil based fatty acid mixture}, series = {Book of Abstracts of the 7th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry Karlsruhe, March 23-25, 2014}, booktitle = {Book of Abstracts of the 7th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry Karlsruhe, March 23-25, 2014}, publisher = {abiosus e.V. Conferences}, address = {Karlsruhe, Germany}, abstract = {The rising applications of enriched unsaturated fatty acid fractions are significantly increasing the need for a cheap method of manufacturing such fractions. Melt crystallization is an established method for purification and enrichment of desired fractions from mixtures [1, 2, 3]. Enrichment of such natural unsaturated fractions by melt crystallization processes has already been proved effective in prior investigations [1, 2]. Since then many analytical and investigative methods have been applied on various natural plant oil based poly-unsaturated fatty acid (PUFA) mixtures to generate the much needed fundamental melt crystallization data [1]. One such method is the use of in-situ polarized light microscopy [1, 4, 5]. Some of the important parameters affecting the melt crystallization of PUFA mixtures are nucleation and crystal growth rate. To be able to observe and visualize these micro-scale phenomena, circular polarized transmitted light microscopy was applied. A tempered chamber (Linkam LS 120) containing the sample between two object slides was placed right within the microscope camera setup (Leica DM RME and Leica DFC 500) with a viewing window. With respect to the transmitted light, the sample was placed between two circular polarized filters such that the system is calibrated for optimal visualization. Unlike linear polarization, in this method every crystal independent of its alignment in the sample, delivers an interference color different from its background. This way, the entire crystal structure could be clearly separated from the melt. Nucleation and crystal growth rate of a high oleic sunflower oil based PUFA was measured using this method at 5K supercooling and 10K/min cooling rate. Growth curves for total crystal area and number of crystals were analyzed and illustrated graphically. A typical S- curve is observed for both the cases starting with a lag phase followed by an exponential growth phase and ending in a saturation phase.}, language = {en} } @misc{DasguptaRettigAy, author = {Dasgupta, Sunanda and Rettig, Florian and Ay, Peter}, title = {Nucleation kinetics during melt crystallization of plant based high oleic and linoleic polyunsaturated fatty acid mixtures}, series = {Crystal Growth \& Design}, volume = {16}, journal = {Crystal Growth \& Design}, number = {2}, issn = {1528-7505}, doi = {10.1021/acs.cgd.5b01432}, pages = {861 -- 866}, abstract = {Nucleation kinetics of high linoleic and high oleic polyunsaturated fatty acid (PUFA) mixtures were investigated during melt crystallization by means of an Focused beam reflectance measurement (FBRM) sensor. Samples were analyzed thermally and chemically in the Differential Scanning Calorimeter (DSC) and Gas Chromatograph (GC) respectively. Investigations showed that a high oleic content in the PUFA mixtures lead to higher induction times, τi. Unlike previous investigations, a clear relation between τi and cooling rates was established. τi increases with increasing cooling rates and decreasing supercooling. Activation energies of nucleation, ∆Gc' were determined by means of the Fisher Turnbull equation wherein ∆Gc' decreases exponentially with increasing supercooling. Investigations and further evaluations conclude that while the plot establishes the effect of supercooling on ∆Gc' , it does not incorporate the effects of molecular diffusion or the cooling rate. Hence, 3D modeling was performed to visualize the combined effects of cooling rate and supercooling on induction time.}, language = {en} } @misc{OyegbileAyNarra, author = {Oyegbile, Benjamin and Ay, Peter and Narra, Satyanarayana}, title = {Optimisation of micro-processes for shear-assisted solid-liquid separation in a rotatory batch flow vortex reactor}, series = {Journal of Water Reuse and Desalination}, volume = {6}, journal = {Journal of Water Reuse and Desalination}, number = {1}, doi = {10.2166/wrd.2015.057}, pages = {125 -- 136}, abstract = {This paper reports the study of micro-processes in a novel pre-treatment technique using a pellet forming batch flow vortex reactor of cylindrical shape that consists of axially revolving rotor plates between fixed stator plates. The suspension was first mixed with high molecular weight synthetic polymers by stirring for approximately 50 seconds and then agitated for 20 minutes. The process was optimised for a number of operating conditions including polymer type and dosing regimen, rotation speed, wall-plate gap distance, residence time and suspension filling method. The results of the investigation show that optimising a number of process variables that influence floc formation and growth, along with specific apparatus construction and geometry, help to maintain the suspension in a metastable state that is crucial for the formation of pellet-like compact agglomerates with better dewaterability and uniform aggregate size. A maximum dry solids content of 28.3\% after gravity dewatering through a 0.5 mm sieve was recorded during the investigation, with a maximum particle removal efficiency of 97.5\%.}, language = {en} } @misc{EckertDasguptaSelgeetal., author = {Eckert, Karl-Andreas and Dasgupta, Sunanda and Selge, Benjamin and Ay, Peter}, title = {Solid liquid phase diagrams of binary fatty acid mixtures - Palmitic/stearic with oleic/linoleic/linolenic acid mixture}, series = {Thermochimica Acta}, volume = {Vol. 630}, journal = {Thermochimica Acta}, issn = {0040-6031}, doi = {10.1016/j.tca.2016.02.008}, pages = {50 -- 63}, abstract = {The solid liquid phase diagrams of binary mixtures of the five main saturated and unsaturated fatty acids present in most edible plant oils have been determined in this paper. These binary mixtures comprise of a saturated fatty acid, either palmitic (C16:0) or stearic (C18:0) and an unsaturated one, oleic (C18:1), linoleic (C18:2) or linolenic (C18:3) acid. Differential scanning calorimetry (DSC) was used to obtain an overview of the solid liquid transition behaviour including the metastable ranges of these mixtures. In order to describe all the phase transformations in these systems, the boundary functions have been determined and compared. Phase diagrams determined, illustrate characteristic behaviour in accordance to literature. This work specifically focuses on to describe the solid liquid transitions of the mixtures and not on every single transition or reaction. This paper contributes to the elucidation of the phase behaviour of these important mixtures which are applied in diverse industries.}, language = {en} } @misc{EckertDasguptaSelgeetal., author = {Eckert, Karl-Andreas and Dasgupta, Sunanda and Selge, Benjamin and Ay, Peter}, title = {Construction and comparison of solid liquid phase diagrams of binary sat-sat and unsat-unsat fatty acid mixtures comprising two of palmitic/stearic/oleic/linoleic/linolenic acid}, series = {Journal of Environmental Research And Development}, volume = {10}, journal = {Journal of Environmental Research And Development}, number = {4}, issn = {0973-6921}, pages = {10}, abstract = {In this paper, binary phase diagrams of the five main fatty acids present in edible oil based mixtures are shown. While previously the binary systems of one saturated and one unsaturated acid were investigated, in this work the binary mixtures comprise of palmitic (C16:0) and stearic acid (C18:0) or a binary mixture of oleic (C18:1), linoleic (C18:2) or linolenic acid (C18:3). In order to obtain the phase diagrams with all the solid liquid and solid phase transitions, the mixtures were analyzed by means of Differential Scanning Calorimetry (DSC). Phase change boundary functions based on thermodynamic models and experimental values were fitted and compared. The phase diagrams obtained show behaviors in good agreement to literature. The paper contributes to the deeper understanding of the essential phase change effects during industrial crystallization processes.}, language = {en} } @misc{KloseReinholdLogschetal., author = {Klose, Markus and Reinhold, Romy and Logsch, Florian and Wolke, Florian and Linnemann, Julia and Stoeck, Ulrich and Oswald, Steffen and Uhlemann, Martin and Ballach, Juan and Markowski, Jens and Ay, Peter and Giebeler, Lars}, title = {Softwood lignin as a sustainable feedstock for porous carbons as active material for supercapacitors using an ionic liquid electrolyte}, series = {ACS Sustainable Chemistry \& Engineering}, volume = {5}, journal = {ACS Sustainable Chemistry \& Engineering}, number = {5}, pages = {4095 -- 4102}, language = {en} } @misc{EckertDasguptaSelgeetal., author = {Eckert, Karl-Andreas and Dasgupta, Sunanda and Selge, Benjamin and Ay, Peter}, title = {Novel model for the prediction of SSLE temperatures and crystallization paths of any mixture containing palmitic, stearic, oleic, linoleic and linolenic acid}, series = {Thermochimica Acta}, volume = {652}, journal = {Thermochimica Acta}, issn = {0040-6031}, doi = {10.1016/j.tca.2017.03.015}, pages = {126 -- 140}, abstract = {A mathematical model for the prediction of phase change temperatures and crystallization paths for mixtures consisting of palmitic (P), stearic (S), oleic (O), linoleic (L) and linolenic acid (Ll) in any distribution is presented in this paper. This model is based on the information gathered from modeled ternary phase diagrams, namely PSO, PSL, PSLl and OLLl, that were based on experimental binary phase diagrams of all possible combinations of these fatty acids. These experimental binary phase diagrams were obtained by means of differential scanning calorimetry and mathematical function fitting, within which the eutectic region of binary palmitic/stearic with oleic/linoleic/linolenic acid was investigated in detail. The basic mathematical model used was previously shown in literature which delivered good results for such systems. The importance of the developed model was then justified by investigations on real and composed synthetic fatty acid mixtures, where a high accuracy of the predicted temperatures could be shown for the technically relevant liquidus and solidus temperatures. A satisfying prediction for thermal events below the first solidus line could be reached as well. This work directly contributes to an enhanced understanding of the thermodynamic and kinetic background of such important mixtures applied in diverse products and industries, thereby showing a large optimization potential for crystallization technologies.}, language = {en} } @misc{MarkowskiHintze, author = {Markowski, Jens and Hintze, Helene}, title = {R{\"u}ckgewinnung und Aufbereitung der Kathodenbeschichtungen von Lithium-Ionen-Traktionsakkumulatoren}, series = {Technical Days - Aktuelle Entwicklungen und zuk{\"u}nftige Herausforderungen in der Welt des Trockenzerkleinerns und Sichtens - Symposium 2019}, journal = {Technical Days - Aktuelle Entwicklungen und zuk{\"u}nftige Herausforderungen in der Welt des Trockenzerkleinerns und Sichtens - Symposium 2019}, address = {Hanau}, abstract = {Die energie- und ressourcenschonende Aufbereitung von End-of-life-Lithium-Ionenakkus ist ein gesellschaftliches und wirtschaftliches Erfordernis, da mit dem zunehmenden Einsatz von Elektrofahrzeugen die Zahl von ausgedienten oder defekten Li-Traktionsbatterien zunehmen wird. Die klassische Aufbereitung dieser Akkus, insbesondere mit Hochtemperaturverfahren, ist energetisch aufw{\"a}ndig und f{\"u}hrt zudem nur zur partiellen R{\"u}ckgewinnung der Wertelemente, die dann auch erst durch weitere mechanische und chemische Prozesse wieder zu verwendbaren Materialien werden. Die vom Fachgebiet Aufbereitungstechnik der BTU mit verschiedenen Industriepartnern seit 2010 entwickelte Technologie verfolgt einen grundlegend anderen Ansatz. Ausgehend von einer hoch mechanisierten und teilweise automatisierten Demontage der Akkus k{\"o}nnen dabei die Einzelkomponenten weitgehend unzerst{\"o}rt und ohne thermische Sch{\"a}digung oder Verlust brennbarer und leicht fl{\"u}chtiger Anteile zur{\"u}ck gewonnen werden. F{\"u}r die Abtrennung der Kathodenbeschichtung von der Tr{\"a}gerfolie kommt nach der Zellendemontage eine hoch mechanisierte Nassaufbereitung zum Einsatz, bei der mittlerweile vollst{\"a}ndig auf den Einsatz von Chemikalien verzichtet werden kann. Das separierte NMC-Schwarzmaterial soll so aufbereitet werden, dass es zuk{\"u}nftig in Recyclat-Zellen f{\"u}r verschiedene Anwendungen genutzt werden kann. Dazu werden verschiedene Zerkleinerungs- und Sortiertechnologien getestet.}, language = {de} } @misc{MarkowskiAckerDuckeetal., author = {Markowski, Jens and Acker, J{\"o}rg and Ducke, Jana and Schelter, Matthias}, title = {Recovery and secondary use of Nickel-Manganese-Cobalt-Material from Cathodes of electric car traction batteries}, series = {59th Annual Conference of Metallurgists : emerging technologies in materials and metallurgical industries : COM 2020}, volume = {2020}, journal = {59th Annual Conference of Metallurgists : emerging technologies in materials and metallurgical industries : COM 2020}, publisher = {Canadian Institute of Mining, Metallurgy and Petroleum}, isbn = {978-1-926872-47-6}, abstract = {Automotive technology is increasingly determined by electric vehicles driven by high-performance lithium ion batteries (LIB). Li-ion batteries equipped with layered oxide cathodes, which are constituted by oxides of nickel, manganese and cobalt, are proven as storage devices that combine high electrical power, high cycling stability and compact dimensions. These batteries contain large amount of valuable elements, such as the cathodes consisting of cobalt and nickel, the electrode carrier foils consisting of copper and aluminium. Therefore, spent LIB's are valuable secondary resources. Thermal processing as the classical recycling-technology for LIB's is energy-intensive and allow only a partial recovery of some value elements. Scientists of the Brandenburg University of Technology (Germany) developed in collaboration with industrial partners (SME) a process, in which the complex system LIB is partly automated dismounted into its basic components. The core of this process is the separation of anodes and cathodes from each other and an almost complete recovery of the cathode material from the foil. The recovered cathode material has an enormous potential for a re-use in new LIB's. By a proper combination of separation and post-treatment the material has a quality that is close to virgin cathode material. Preliminary studies made on LIB's containing a fraction of recycled cathode material up to 50\% show an electrical performance comparable to LIB's made from virgin material.}, language = {en} } @inproceedings{LogschGlaserBalzetal., author = {Logsch, Florian and Glaser, Claudia and Balz, Jessica and Ay, Peter and Leiker, Matthias and Heiduschke, Rene}, title = {Experimental studies of the pelletizing-flocculation process of ironhydroxide containing suspensions in a Taylor-Couette-Reactor}, series = {Abstracts of the XXIX International Mineral Processing Congress : 17-21 september, 2018}, booktitle = {Abstracts of the XXIX International Mineral Processing Congress : 17-21 september, 2018}, edition = {1. Auflage}, publisher = {Ore and Metals, Publishing House, Moscow}, address = {Moscow}, isbn = {978-5-98191-086-9}, pages = {189}, abstract = {The treatment of iron-hydroxide-containing water from ground water and surface water is achieved by a combination of the process steps of flocculation and subsequent mechanical dewatering. The aim is to create solid pellet structures by extending the structure forming flocculation process with a build-up pelletizing process which can be transferred directly into a drying unit. A Taylor-Couette-reactor (diameter of the inner cylinder - 40 mm, gap width - 5 mm) was used for these experimental studies. To produce the necessary flow profile the inner cylinder was rotated at a speed of 230 rpm. The iron hydroxide-containing suspension (dry matter content: 2 mass \%) was added simultaneously with the addition of a cationic high-molecular flocculant in various flocculant dosages and residence times of 5 to 15 min. The pellets were examined for parameters such as geometric dimensions, dry substance content and dewatering behaviour. As the results show, there is a direct relationship between the residence time and the geometric dimensions of the pellets. After a residence time of 5 min, round pellets with an average diameter of 6 mm were formed. With an increase in the residence time up to 15 min, a compaction of the pellets could be observed, which resulted in an increase in the dry substance content of 8.0 to 11.2 mass \% on average. After completion of the pelletizing process, the pellets were mechanically dewatered by filtration. By applying this innovative wet pelletizing of iron-hydroxide containing suspensions in a Taylor-Couette-reactor, it is possible to carry out the process of flocculation combined with the pellet formation with simultaneous pellet compaction in a single process step. The resulting pellet structures are distinguished from conventional floc structures by an improved water discharge capacity. After classification the pellets can be marked directly as easy-to-handle bulk material, suitable as feedstock in percolation columns for the purification of contaminated fluid streams}, language = {en} } @inproceedings{DasguptaGlaserAy, author = {Dasgupta, Sunanda and Glaser, Claudia and Ay, Peter}, title = {SLE diagram for a high oleic palm oil based fatty acid mixture at low saturated content}, series = {9th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry, March 19-21, 2017, Karlsruhe, Germany}, booktitle = {9th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry, March 19-21, 2017, Karlsruhe, Germany}, publisher = {Abiosus e.V.}, address = {Oldenburg}, abstract = {Vegetable oils and their derivatives are increasingly replacing mineral oils in their applications.[1,2] Among other constituents in vegetable oil, both saturated and unsaturated fractions are important raw materials. The latter possesses double bonds which can provide as substrates or raw materials for various chemical industries.[3] Fractionation of these oils or as in our case the Poly-Unsaturated Fatty Acid (PUFA) mixture is required so as to generate favorable compositions according to applications. Generation of Solid Liquid Equilibrium (SLE) phase diagrams for real mixtures is extremely important to enable a thorough understanding of the thermodynamics of the fractionation process of crystallization. The PUFA mixture was fractionated in a multistage scrubbing layer crystallizer. The product was put into a decanter centrifuge so as to fractionate them into mother liqor and crystal fraction. The temperature in the jacket was maintained such that △T< 5K from the liquidus point obtained from the Differential Scanning Calorimeter (DSC) thermal analyses. Each crystallizer was also maintained at a temperature 5K below the previous one. This way a slow and successive cooling of the PUFA was achieved such that probes from different fraction could be obtained. They were analyzed thermally and chemically in the DSC and Gas Chromatography - Flame Ionization Detector (GC-FID) setup respectively.[4] Similar to previous literature as in [5], technically relevant partial SLE diagrams for high oleic palm oil was created by fractionating the mixture in a scrubbed layer crystallizer along with their metastable range were determined.[6]}, language = {en} } @inproceedings{MarkowskiPempelAy, author = {Markowski, Jens and Pempel, Harry and Ay, Peter}, title = {Recovery of nickel-containing coatings with hydro-biotechnological methods}, series = {COM 2017, Conference of Metallurgists (MetSoc), The 56th Annual Conference of Metallurgists, hosting World Gold and Nickel-Cobalt, August 27-30, 2017, Hyatt Regency Vancouver, British Columbia, Canada}, booktitle = {COM 2017, Conference of Metallurgists (MetSoc), The 56th Annual Conference of Metallurgists, hosting World Gold and Nickel-Cobalt, August 27-30, 2017, Hyatt Regency Vancouver, British Columbia, Canada}, publisher = {Canadian Institute of Mining, Metallurgy and Petroleum}, address = {Vancouver}, isbn = {978-1-926872-36-0}, abstract = {Metal-coated thermoplastic parts find more and more functional and aesthetic applications in the interior and exterior of cars. The vapor-deposited or electroplated coatings are usually composed of a plurality of nickel- and chromium-containing layers, which are applied to copper-containing carrier layers on the polymers. Previously, recycling processes are mainly focussed at the recovery or thermal utilization of the plastics. Targeted and selective recycling of the metallic coatings is usually not carried out. Together with several SME, BTU developed a process, in which a complete and separate recovery of all components in high purity is possible with biotechnological methods. The bioleaching is carried out with iron and sulfur-oxidizing bacteria, esp. Acidithiobacillus ferrooxidans. The copper-containing layers are dissolved in the solution; chromium- and nickel-containing particles are precipitated as solids. After the bioleaching, a mechanical separation of the individual metal-containing components and their separate workup are carried out. End-products are metallic copper, a nickel- and chromium-containing solid and the cleaned plastics. The bioleaching ensures a high purity of the end products. Through the use of bacteria, which are also found in nature, the process is environmentally friendly. Compared to chemical leaching using inorganic acids, considerably shorter leaching times can be achieved. In addition to the optimization of the leaching process, the R/D-project also includes the development and testing of the apparatus technology.}, language = {en} } @inproceedings{MarkowskiAyPempeletal., author = {Markowski, Jens and Ay, Peter and Pempel, Harry and Logsch, Florian}, title = {Recycling of metal-coated plastic parts from end-of-life-vehicles (ELV) with biotechnological methods}, series = {Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016), September 11-15, 2016, Qu{\´e}bec City, Canadian Institute of Mining, Metallurgy and Petroleum}, booktitle = {Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016), September 11-15, 2016, Qu{\´e}bec City, Canadian Institute of Mining, Metallurgy and Petroleum}, isbn = {978-1-926872-29-2}, pages = {Paper 191}, abstract = {Due to the European Directive 2000/53/EC on end-of-life-vehicles, from 2015 on more than 95\% of car materials have to be recycled. In order to recycle the materials back into the economic cycle, it is necessary to produce products with high quality and purity. Plastic components in cars, which are coated with metals by vapour deposition or electroplating, have a wide circulation (e.g., as cladding panel or trim strip for interiors and exteriors). In the end-of-life-vehicle recycling process, these plastic-metal composites are not considered in usual technologies (car shredder) and are not separated from Automotive Shredder Residue. These parts can be separated by optical or HF-detection sorting and then introduced to a specific treatment. Experiments with a specially developed bioleaching configuration showed that the thin coatings, which consist mainly of copper, nickel and chromium, can be removed efficiently from the polymer base materials by a bioleaching solution with Acidothiobacillus ferrooxidans as a leaching agent. The solution used was produced in special fermenters with a 9K-nutrient salt media. During the bioleaching process at 35°C maximum temperature, most of the copper is dissolved and the other metals accumulate as metal sludge. The bacterial cultures based on A. ferrooxidans are robust and resilient. After a 48-hour bioleaching period while the composites were stirred regularly with ventilation, the plastic particles were completely free from metallic coatings. The metal components are separated for further use: undissolved components (mainly Ni and Cr) are separated by decantation of the solution; dissolved copper recovey is carried out by cementation of copper. The cementated solid contains ~98\% Cu, along with small amounts of other metals. With the bioleaching process, good separation and re-utilization of the metallic coatings is possible. The cleaned plastic parts were prepared by compounding for new applications with injection-moulding.}, language = {en} } @inproceedings{AyGlaserLogschetal., author = {Ay, Peter and Glaser, Claudia and Logsch, Florian and Narra, Satyanarayana and Gemende, Bernhard and Gerbeth, Anja and Riedel, Tobias and Pausch, Nicole and Leiker, Matthias and B{\"a}de, Bianka and Heiduschke, Rene}, title = {Micro-structured Iron (III) hydroxide agglomerates with high porosity as adsorbents}, series = {Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016), September 11-15, 2016, Qu{\´e}bec City, Canadian Institute of Mining, Metallurgy and Petroleum}, booktitle = {Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016), September 11-15, 2016, Qu{\´e}bec City, Canadian Institute of Mining, Metallurgy and Petroleum}, isbn = {978-1-926872-29-2}, pages = {Paper 263}, abstract = {This study focusses on the production of micro-structured agglomerates with high porosity from iron (III)-hydroxide-containing materials as adsorbent. A fractal structure of the agglomerates was created through a two-stage agglomeration process. Developing porous structures was necessary to increase the adsorption capacity. Various materials were used for the agglomeration experiments: i) filter cake (dry matter content 23 to 27 wt.-\%); ii) FerroSorp®DGμ, a product which is already being used commercially for various applications in water cleaning. These materials in the pristine state have different characteristics such as dry matter content and particle size distribution. The desired optimised agglomerates can be achieved with the help of additives or binders, respectively. Additionally, the agglomeration process parameters play a vital role. In order to produce agglomerates with high porosity, the process was carried out in two steps. Firstly, FerroSorp®DGμ (d90 < 30 µm) was agglomerated jointly with the aforementioned filter cake in an Eirich intensive mixer (particle size range 125 µm < d90 < 500 µm). The second agglomeration step post drying was carried out in a pelletisation disc or in an Eirich intensive mixer with the addition of polymeric binders (up to particle sizes ranging from 2 to 4 mm). Agglomerates were characterised both in short and long term loading tests using phosphate as model ion. Contact times were less than 10 min, similar to practical application in percolation columns, or more than 7 days, respectively. The results show that the agglomerates produced in the two-stage pelletisation process have more advantageous properties like better accessibility of the active sites obtained by specificly influencing the particle size distribution during the two-stage pelletisation process.}, language = {en} } @inproceedings{JurischkaPedaNarraetal., author = {Jurischka, C. and Peda, S. and Narra, Satyanarayana and Smieszek, Marlene and Stollberg, Christian and Ay, Peter and Kay, M.}, title = {Innovative technologies for production of highly pure substances and bio fine chemicals from plants}, series = {18th European Biomass Conference and Exhibition, proceedings of the international conference held in Lyon, France, 3 - 7 May 2010}, booktitle = {18th European Biomass Conference and Exhibition, proceedings of the international conference held in Lyon, France, 3 - 7 May 2010}, publisher = {ETA-Florence Renewable Energies}, address = {Florence}, isbn = {978-88-89407-56-5}, language = {en} } @inproceedings{Markowski, author = {Markowski, Jens}, title = {Characterisation and materials flow management for WEEE plastics from German dismantling centres}, series = {ISWA World Congress, Antwerpen, 2015}, booktitle = {ISWA World Congress, Antwerpen, 2015}, publisher = {Interafval, Belgium}, language = {en} } @phdthesis{Walaszek, author = {Walaszek, Wiktoria}, title = {Untersuchungen zu Strukturbildungsph{\"a}nomenen in der Pelletierungsflockung in Abh{\"a}ngigkeit von der Prozessf{\"u}hrung im Hinblick auf die Optimierung der Feststoffkonditionierung}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-1699}, language = {de} } @inproceedings{DasguptaAy, author = {Dasgupta, Sunanda and Ay, Peter}, title = {Enrichment of unsaturated fractions in a Linseed oil based fatty acid mixture by melt crystallisation}, series = {5th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry, Karlsruhe, Germany}, booktitle = {5th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry, Karlsruhe, Germany}, pages = {S. 93}, abstract = {Enriched plant based unsaturated fatty acid mixtures are increasingly finding applications in various fields like those of production of bio-fuels and polymerization of epoxy resins. In the case of production of epoxy resins, they are highly advantageous due to the presence of multiple double bonds in the fatty acids which provide opportunities for cross linking by substitution. On the other hand, bio-fuels need raw materials with very low crystallization temperatures. This special property can also be attributed to these enriched unsaturated fractions due to their weak inter-molecular interactions owing to the kink in their structures. Melt crystallization has long been established as an optimal method for purification and enrichment of fractions from mixtures [1,2]. Previous studies have shown promising results with regard to enrichment of unsaturated fractions by melt crystallization processes [1]. Melt crystallization kinetics of two plant based poly-unsaturated fatty acid mixtures have been investigated in this study [3]. A high oleic and a high linoleic fatty acid mixture were chosen for comparison purposes. A V-form reactor was developed for optimal in-situ analysis with the help of the focused beam reflectance measurement (FBRM®, Mettler Toledo Ltd., Switzerland) instrument [3]. Enhanced heat transfer especially to deal with the heat given out during crystallization was enabled through minimal volume of sample, optimized mixing and the special shape of the reactor. Important parameters like induction time, mixing speed, etc have been determined and compared as functions of degree of supercooling and composition of PUFA mixtures. In accordance to theory, the induction times in both the cases decreased with increasing supercooling and mixer speed. On the other hand, the high linoleic fatty acid mixture required much higher supercooling (4.4K to 5.4K) than the high oleic mixture (2.2K to 3.2K) for favorable induction times. References [1] S. Dasgupta, N. Dreiack, P. Ay, presented at the 5th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry (Eds: J.O. Metzger, M.A.R. Meier), Karlsruhe 2012 [2] G.F. Arkenbout, Melt Crystallization Technology, Technomic Publishing Company Inc., Pennsylvania 1995 [3] S. Xu, Master thesis, Chair of Mineral Processing, Processing of Biogenous Resources, Brandenburg University of Technology, Cottbus 2010}, language = {en} } @inproceedings{StollbergSchmidtNamangoetal., author = {Stollberg, Christian and Schmidt, M. and Namango, Saul and Pohl, R. and Ay, Peter}, title = {Conditioning, Identification and Automatic Sorting of Plastic Automotive Parts for Productive Recycling}, series = {International Automobile Recycling Congress, IARC 2002, Geneva, Switzerland, March 13 - 15, 2002, proceedings}, booktitle = {International Automobile Recycling Congress, IARC 2002, Geneva, Switzerland, March 13 - 15, 2002, proceedings}, publisher = {ICM AG}, address = {Muri}, language = {en} } @inproceedings{AyGaydardzhiev, author = {Ay, Peter and Gaydardzhiev, Stoyan}, title = {Surface charge studies - an important approach for investigation of color removal from textile waste water by chemical coagulation}, series = {International seminar on mineral proceesing technology (MPT-2004), 19 - 21 February 2004}, booktitle = {International seminar on mineral proceesing technology (MPT-2004), 19 - 21 February 2004}, publisher = {Allied Publishers}, address = {New Delhi [u.a.]}, isbn = {81-7764-599-4}, pages = {741 -- 748}, language = {en} } @inproceedings{GusoviusAySchmidetal., author = {Gusovius, Hans-J{\"o}rg and Ay, Peter and Schmid, Hubert and M{\"u}ssig, J{\"o}rg}, title = {New quantitative image analysis method for the characterization of mineral and fibrous materials}, series = {Proceedings of the XXIII International Mineral Processing Congress, Istanbul, Turkey 3-8 September 2006, Vol. 1}, booktitle = {Proceedings of the XXIII International Mineral Processing Congress, Istanbul, Turkey 3-8 September 2006, Vol. 1}, editor = {{\"O}nal, G{\"u}ven}, publisher = {Promed Advertising Agency}, address = {Istanbul}, isbn = {975-7946-28-1}, pages = {229 -- 234}, language = {en} } @inproceedings{NarraGoettlingAy, author = {Narra, Satyanarayana and G{\"o}ttling, Sandra and Ay, Peter}, title = {Agglomeration of Lignin slugde as a technological innovative conversion for producing energy}, series = {Extended abstracts, 1st International Conference on Materials for Energy, July 4 - 8, 2010, Convention Center Karlsruhe/Germany}, booktitle = {Extended abstracts, 1st International Conference on Materials for Energy, July 4 - 8, 2010, Convention Center Karlsruhe/Germany}, publisher = {DECHEMA}, address = {Frankfurt, M.}, isbn = {978-3-89746-117-8}, language = {en} } @inproceedings{HildebrandtAyGusovius, author = {Hildebrandt, Sven and Ay, Peter and Gusovius, Hans-J{\"o}rg}, title = {Neuartige Verfahren zur angepassten Agglomeration von Naturfasern f{\"u}r den Einsatz in Verbundwerkstoffen}, series = {TECHNOMER 2005, 19. Fachtagung {\"u}ber Verarbeitung und Anwendung von Polymeren, 10. - 12. November 2005, Chemnitz}, booktitle = {TECHNOMER 2005, 19. Fachtagung {\"u}ber Verarbeitung und Anwendung von Polymeren, 10. - 12. November 2005, Chemnitz}, publisher = {Techn. Univ.}, address = {Chemnitz}, language = {de} } @inproceedings{NarraLogschAy, author = {Narra, Satyanarayana and Logsch, Florian and Ay, Peter}, title = {Filtration resistance of the acid treated technical lignin granules and suspensions}, series = {XXVII International Mineral Processing Congress, 20 - 24 October 2014, Chile, Santiago de Chile}, booktitle = {XXVII International Mineral Processing Congress, 20 - 24 October 2014, Chile, Santiago de Chile}, pages = {206 -- 213}, language = {en} } @inproceedings{NarraGlaserGusoviusetal., author = {Narra, Satyanarayana and Glaser, Claudia and Gusovius, Hans-J{\"o}rg and Ay, Peter}, title = {Comparison of grinding and liberation processes for stalky biomass materials as a prerequisite for production of energy pellets with high calorific value}, series = {XXV International Mineral Processing Congress, IMPC 2010, "Smarter processing for the future", Brisbane, Australia 6-10 September 2010, congress proceedings}, booktitle = {XXV International Mineral Processing Congress, IMPC 2010, "Smarter processing for the future", Brisbane, Australia 6-10 September 2010, congress proceedings}, publisher = {AusIMM}, address = {Carlton South, Australia}, isbn = {978-1-921522-28-4}, language = {en} } @inproceedings{NarraBrinkerAy, author = {Narra, Satyanarayana and Brinker, Mona and Ay, Peter}, title = {Particle size distribution of communited and liberated cereal straws measured with different image analysis systems and their characteristic influence on mechanical pellets quality}, series = {XXVI International Mineral Processing Congress - IMPC 2012 : New Delhi, India, September 24 - 28, 2012}, booktitle = {XXVI International Mineral Processing Congress - IMPC 2012 : New Delhi, India, September 24 - 28, 2012}, publisher = {New Delhi}, isbn = {81-901714-3-7}, language = {en} } @inproceedings{NarraGeldtGlaseretal., author = {Narra, Satyanarayana and Geldt, Elena and Glaser, Claudia and Ay, Peter}, title = {Technical realization of the innovative roll-agglomeration of bast fibres in industrial scale}, series = {XXVII International Mineral Processing Congress, 20 - 24 October 2014, Chile, Santiago de Chile}, booktitle = {XXVII International Mineral Processing Congress, 20 - 24 October 2014, Chile, Santiago de Chile}, pages = {345 -- 355}, language = {en} } @inproceedings{MarkowskiNarraAyetal., author = {Markowski, Jens and Narra, Satyanarayana and Ay, Peter and Hein, Christian and Weber, Alfred}, title = {Production of agglomerates from iron-containing fines from the ASR-recycling processes for its use in blast furnaces}, series = {XXVI International Mineral Processing Congress - IMPC 2012 : New Delhi, India, September 24 - 28, 2012, vol. 1}, booktitle = {XXVI International Mineral Processing Congress - IMPC 2012 : New Delhi, India, September 24 - 28, 2012, vol. 1}, address = {New Delhi}, isbn = {81-901714-3-7}, abstract = {The EU Directive 2000/53/EC on end-of life vehicles (ELVs) states that in 2015 at least 85 wt.-\% of a vehicle has to be reused or recycled. This result in the obligatory need to separate additionally metallic and other components of the automotive shredder residues (ASR), so that they can be professionally prepared for recycling and reuse further. Currently the iron-containing fines of ASR are deposited as it is not possible to process in blast furnaces due to its particle size (< 4 mm), composition and material properties. Additionally problems are also caused in handling and transportation (dust) of the material. This work focuses mainly on the ASR materials utilization in blast furnaces. Material was further separated into two consecutive fractions by carrying out repeated crushing and magnetic separation twice. The two fractions have significantly higher iron content (up to 75 wt.-\%) compared to the initial material mixture. The materials were assessed for their usage in blast furnaces based on the possible pelletisation with and without binders, stability of pellets, shape and size of pellets, etc. Pelletisation of the material was carried out with a single mould pellet press. Further lignite coal was added to the mixture as additive which improved the pelletisation behavior and the mechanical stability of pellets. Lignite coal was chosen as reducing agent in the blast furnace process contributing towards additional savings in energy supplied. The experiments reveal that the production of pellets from iron-containing fines is possible with a lignite coal admixture of about 15 wt.-\%. These pellets displayed good mechanical stability and can be used in blast furnace processes in recovery of the recyclable metals which are currently not recycled. The recycling of not yet recyclable metals would reduce the deposition and can be easily adopted into the economic cycle by their utilization.}, language = {en} } @inproceedings{NarraGlaserGusoviusetal., author = {Narra, Satyanarayana and Glaser, Claudia and Gusovius, Hans-J{\"o}rg and Ay, Peter}, title = {Pelletisation of cereal straws as a source of energy after specific communition processes}, series = {18th European Biomass Conference and Exhibition, proceedings of the international conference held in Lyon, France, 3 - 7 May 2010}, booktitle = {18th European Biomass Conference and Exhibition, proceedings of the international conference held in Lyon, France, 3 - 7 May 2010}, publisher = {ETA-Florence Renewable Energies}, address = {Florence}, isbn = {978-88-89407-56-5}, language = {en} } @inproceedings{NarraGlaserAy, author = {Narra, Satyanarayana and Glaser, Claudia and Ay, Peter}, title = {Abrasion and strength of biomass pellets as main mechanical stability characteristics}, series = {19th European Biomass Conference and Exhibition, proceedings, ICC Berlin International Congress Center Berlin, Germany, conference 6 - 10 June 2011}, booktitle = {19th European Biomass Conference and Exhibition, proceedings, ICC Berlin International Congress Center Berlin, Germany, conference 6 - 10 June 2011}, publisher = {ETA-Florence Renewable Energies}, address = {Florence}, isbn = {978-88-89407-55-7}, language = {en} } @article{NagelAy, author = {Nagel, Manfred and Ay, Peter}, title = {Dreidimensionale morphologische Untersuchung von Flocken}, series = {GIT Laborfachzeitschrift}, volume = {45}, journal = {GIT Laborfachzeitschrift}, number = {6}, issn = {0016-3538}, pages = {656 -- 658}, language = {de} } @phdthesis{CatalanAsenjo, author = {Catalan Asenjo, Helena}, title = {Entwicklung eines Cr6+-freien Titanaktivierungsverfahrens zur elektrochemischen Beschichtung}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-4295}, language = {de} }