@misc{NarraAyGlaser, author = {Narra, Satyanarayana and Ay, Peter and Glaser, Claudia}, title = {Vorrichtung und Verfahren zur Agglomeration der Ablauge eines Cellulosegewinnungsprozesses}, 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{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{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} } @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{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} } @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} } @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} } @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} } @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{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{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{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{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{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} }