TY - GEN A1 - Klose, Markus A1 - Reinhold, Romy A1 - Logsch, Florian A1 - Wolke, Florian A1 - Linnemann, Julia A1 - Stoeck, Ulrich A1 - Oswald, Steffen A1 - Uhlemann, Martin A1 - Ballach, Juan A1 - Markowski, Jens A1 - Ay, Peter A1 - Giebeler, Lars T1 - Softwood lignin as a sustainable feedstock for porous carbons as active material for supercapacitors using an ionic liquid electrolyte T2 - ACS Sustainable Chemistry & Engineering KW - porous carbons KW - lignin KW - supercapacitors Y1 - 2017 VL - 5 IS - 5 SP - 4095 EP - 4102 ER - TY - PAT A1 - Narra, Satyanarayana A1 - Ay, Peter A1 - Glaser, Claudia A1 - Logsch, Florian T1 - Verfahren zur Herstellung von wasserunlöslichen Lignin-Agglomeraten Y1 - 2012 ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Logsch, Florian A1 - Glaser, Claudia A1 - Ay, Peter A1 - Döhling, Frank A1 - Leistner, Diana A1 - Strube, Dieter ED - Thrän, Daniela ED - Pfeiffer, Diana T1 - LignoBioFuel : Entwicklung eines Verfahrens zur Herstellung von stofflich und energetisch nutzbaren Bioagglomeraten auf der Basis von Lignin T2 - Effizient, umweltverträglich, dezentral - neue Konzepte für die Nutzung von biogenen Festbrennstoffen, Bd. 2 Y1 - 2014 SP - 85 EP - 99 PB - DBFZ, Dt. Biomasseforschungszentrum CY - Leipzig ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Logsch, Florian A1 - Glaser, Claudia A1 - Ay, Peter ED - Thrän, Daniela ED - Pfeiffer, Diana T1 - Erzeugung von Bioagglomeraten auf der Basis ligninhaltiger Ablaugen der Papier- und Zellstoffindustrie T2 - Effizient, umweltverträglich, dezentral - neue Konzepte für die Nutzung von biogenen Festbrennstoffen, Bd. 2 Y1 - 2013 SP - 247 EP - 264 PB - DBFZ, Dt. Biomasseforschungszentrum CY - Leipzig ER - TY - PAT A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Ay, Peter A1 - Logsch, Florian T1 - Verfahren zur Herstellung von wasserunlöslichen Lignin-Agglomeraten N2 - Die Erfindung betrifft ein Verfahren zur Herstellung von wasserunlöslichen Agglomeraten aus Ablauge eines Cellulosegewinnungsprozesses. Erfindungsgemäß umfasst das Verfahren die folgenden Schritte: 1. Durchführung einer Granulation mit der Ablauge zur Erzeugung von Lignin-Agglomeraten und 2. Behandeln der erzeugten Lignin-Agglomerate mit einer Säure. KW - Sprühgranulation Lignin-Agglomerate, Agglomeration von Ligninen Y1 - 2013 ER - TY - CHAP A1 - Logsch, Florian A1 - Glaser, Claudia A1 - Balz, Jessica A1 - Ay, Peter A1 - Leiker, Matthias A1 - Heiduschke, Rene T1 - Experimental studies of the pelletizing-flocculation process of ironhydroxide containing suspensions in a Taylor-Couette-Reactor T2 - Abstracts of the XXIX International Mineral Processing Congress : 17-21 september, 2018 N2 - 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 KW - Flocculation, wet-pelletizing, Taylor-Couette-reactor, water purification, Iron(III)-hydroxide-containing material, pelletizing-flocculation Y1 - 2018 SN - 978-5-98191-086-9 SP - 189 PB - Ore and Metals, Publishing House, Moscow CY - Moscow ET - 1. Auflage ER - TY - CHAP A1 - Markowski, Jens A1 - Ay, Peter A1 - Pempel, Harry A1 - Logsch, Florian T1 - Recycling of metal-coated plastic parts from end-of-life-vehicles (ELV) with biotechnological methods T2 - Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016), September 11-15, 2016, Québec City, Canadian Institute of Mining, Metallurgy and Petroleum N2 - 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. KW - Bioleaching, Recycling, Plastic-Metal-Composites, End-of-life-vehicles Y1 - 2016 SN - 978-1-926872-29-2 ER - TY - CHAP A1 - Ay, Peter A1 - Glaser, Claudia A1 - Logsch, Florian A1 - Narra, Satyanarayana A1 - Gemende, Bernhard A1 - Gerbeth, Anja A1 - Riedel, Tobias A1 - Pausch, Nicole A1 - Leiker, Matthias A1 - Bäde, Bianka A1 - Heiduschke, Rene T1 - Micro-structured Iron (III) hydroxide agglomerates with high porosity as adsorbents T2 - Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016), September 11-15, 2016, Québec City, Canadian Institute of Mining, Metallurgy and Petroleum N2 - 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. KW - Microstructured agglomerate KW - Iron(III)-hydoxide-containing material KW - adsorption capacity Y1 - 2016 SN - 978-1-926872-29-2 ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Logsch, Florian A1 - Ay, Peter T1 - Filtration resistance of the acid treated technical lignin granules and suspensions T2 - XXVII International Mineral Processing Congress, 20 - 24 October 2014, Chile, Santiago de Chile Y1 - 2014 SP - 206 EP - 213 ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Logsch, Florian A1 - Glaser, Claudia A1 - Ay, Peter T1 - Sludge-pelleting of paper and pulp residues T2 - XXVI International Mineral Processing Congress - IMPC 2012, New Delhi, India, September 24 - 28, 2012 Y1 - 2012 SN - 81-901714-3-7 SP - 03723 EP - 03739 CY - New Dehli ER -