TY - GEN A1 - Klepel, Olaf A1 - Scholz, Kerstin A1 - Scholz, Jan A1 - McQuillan, A. James A1 - Wagner, Gerald T1 - Partially embedded highly dispersed Pt nanoparticles in mesoporous carbon with enhanced leaching stability T2 - Carbon Y1 - 2010 SN - 0008-6223 VL - 48 IS - 6 SP - 1788 EP - 1798 ER - TY - GEN A1 - Günther, David A1 - Klepel, Olaf T1 - Synthese von porösen Kohlenstoffmonolithen unter Verwendung von Porenbeton als Templat T2 - Chemie Ingenieur Technik Y1 - 2013 SN - 1522-2640 VL - 85 IS - 6 SP - 955 EP - 959 ER - TY - GEN A1 - Walter, Reni A1 - Klepel, Olaf A1 - Erler, Thomas A1 - Bron, Michael A1 - Niebrzydowska, Paula A1 - Wach, Anna A1 - Kuśtrowski, Piotr T1 - First steps on the way to a modular concept for the preparation of carbon based catalysts T2 - Catalysis Letters Y1 - 2013 SN - 1572-879X VL - 143 IS - 7 SP - 642 EP - 650 ER - TY - GEN A1 - Taubert, Michael A1 - Beckmann, Jens A1 - Lange, Andreas A1 - Enke, Dirk A1 - Klepel, Olaf T1 - Attempts to design porous carbon monoliths using porous concrete as a template T2 - Microporous and Mesoporous Materials Y1 - 2014 SN - 1387-1811 VL - Vol. 197 SP - 58 EP - 62 ER - TY - GEN A1 - Utgenannt, Stephan A1 - Hansen, Felix A1 - Klepel, Olaf A1 - Jarczewski, Sebastian A1 - Wach, Anna A1 - Kuśtrowski, Piotr T1 - Control of porosity and composition of carbon based catalysts prepared by template assisted routes T2 - Catalysis Today KW - Heterogeneous catalysis Y1 - 2015 U6 - https://doi.org/10.1016/j.cattod.2014.10.036 SN - 0920-5861 VL - Vol. 249 SP - 38 EP - 44 ER - TY - GEN A1 - Klepel, Olaf A1 - Taubert, Michael A1 - Heider, Robert A1 - Erlitz, Marcel A1 - Hille, Eva A1 - Lange, Andreas A1 - Enke, Dirk T1 - Synthese von porösen Kohlenstoffmonolithen unter Verwendung von Porenbeton als Templat. Teil II: Untersuchungen mechanischer Eigenschaften T2 - Chemie Ingenieur Technik Y1 - 2015 UR - http://onlinelibrary.wiley.com/doi/10.1002/cite.201400089/pdf U6 - https://doi.org/10.1002/cite.201400089 SN - 1522-2640 SN - 0009-286X VL - 87 IS - 7 SP - 998 EP - 1002 ER - TY - GEN A1 - Klepel, Olaf A1 - Erlitz, Marcel A1 - Scholz, Kerstin A1 - Suckow, Matthias A1 - Taubert, Michael A1 - Utgenannt, Stephan A1 - Garsuch, Arnd T1 - Template assisted synthesis of porous carbons revisited – where does the porosity come from? T2 - Microporous and Mesoporous Materials Y1 - 2016 U6 - https://doi.org/10.1016/j.micromeso.2015.11.047 SN - 1387-1811 IS - vol. 224 SP - 163 EP - 167 ER - TY - GEN A1 - Klepel, Olaf A1 - Danneberg, Nina A1 - Dräger, Matti A1 - Erlitz, Marcel A1 - Taubert, Michael T1 - Synthesis of Porous Carbon Monoliths Using Hard Templates T2 - Materials Y1 - 2016 U6 - https://doi.org/10.3390/ma9030214 SN - 1996-1944 VL - 9 IS - 3 ER - TY - GEN A1 - Günther, David A1 - Beckmann, Jens A1 - Schöneich, Michael A1 - Schmidt, Peer A1 - Klepel, Olaf T1 - Porous concrete as a template for the synthesis of porous carbon materials T2 - Carbon N2 - The potential of industrial porous concrete for using as a template for the synthesis of porous carbon materials has been investigated. Carbon replicas of porous concrete have been prepared by carbonization of sucrose. The pores of the resulting carbon materials range from the macropore to the micropore region, pointing to a hierarchy. Y1 - 2012 UR - http://www.sciencedirect.com/science/article/pii/S000862231200173X?np=y U6 - https://doi.org/10.1016/j.carbon.2012.02.039 SN - 0008-6223 VL - 50 IS - 8 SP - 3092 EP - 3116 ER - TY - GEN A1 - Klepel, Olaf A1 - Danneberg, Nina A1 - Suckow, Matthias A1 - Erlitz, Marcel T1 - Carbon Replicas of Porous Concrete Obtained by Chemical Vapor Deposition - Some Aspects of the Synthesis Mechanism T2 - Materials Sciences and Applications Y1 - 2017 U6 - https://doi.org/10.4236/msa.2017.88043 SN - 2153-117X SN - 2153-1188 VL - 8 IS - 8 SP - 614 EP - 627 ER - TY - GEN A1 - Reichardt, Christina A1 - Utgenannt, Stephan A1 - Stahmann, Klaus-Peter A1 - Klepel, Olaf A1 - Barig, Susann T1 - Highly stable adsorptive and covalent immobilization of Thermomyces lanuginosus lipase on tailor-made porous carbon material T2 - Biochemical Engineering Journal N2 - Hierarchically structured, porous carbon materials (PCM) were synthesized by sucrose infiltration into template material and subsequent carbonization. Three porous carbon materials were prepared using porous concrete (PCM-01) or silica gel (PCM-02 and 03) as template. Carbon particles from 125 to 200 μm were generated. Surface carboxylic group density was determined with 1.1 mmol/g dry material for each variant. Firstly, tailor-made PCM was evaluated as suitable support for lipase immobilization. Recombinant produced lipase of Thermomyces lanuginosus (TLL) was used as model enzyme. Two independent crude immobilization strategies were applied. Residual activities of up to 8.6 U/g and 31 U/g dry material for adsorptive and covalent immobilization (linkage via EDC) were achieved, respectively. Additionally, TLL was immobilized on commercially available polymethacrylate support showing similar residual lipase activities. Secondly, covalent immobilization was optimized to generate reproducible, highly stable and active immobilizates. Optimized covalent immobilizates showed residual activities of up to 10 U∙g⁻¹ dry carbon material using p-nitrophenyl-palmitate assay and protein loads of up to 45 mg g⁻¹dry carbon material. Covalent bound TLL-PCM showed storage stability for 12 months, remaining 100% of the initial activity. Operational stability resulted in stable and 100% active immobilizates over five consecutive cycles of use. Experiments showed that tailor-made porous carbon material is a promising support for lipase immobilization, which is adaptable in shape and dimension. KW - Lipase KW - Covalent immobilization KW - Adsorption KW - Carbon material Y1 - 2018 U6 - https://doi.org/10.1016/j.bej.2018.07.003 SN - 1873-295X IS - 138 SP - 63 EP - 73 ER - TY - GEN A1 - Klepel, Olaf A1 - Lange, Felix A1 - Utgenannt, Stephan T1 - Oxidation of sulfurous acid on carbon catalysts as a test reaction revisited: potential and limitations T2 - Chemical engineering & technology Y1 - 2018 U6 - https://doi.org/10.1002/ceat.201800227 SN - 1521-4125 SN - 0930-7516 VL - 41 IS - 10 SP - 2087 EP - 2092 ER - TY - CHAP A1 - Barig, Susann A1 - Utgenannt, Stephan A1 - Heine, Alexander A1 - Reichardt, Christina A1 - Klepel, Olaf A1 - Schnitzlein, Klaus A1 - Stahmann, Klaus-Peter T1 - Poröses Kohlenstoffmaterial zur Immobilisierung von Lipase–Vergleichende Messungen mit Methacryl‐Beads T2 - Chemie Ingenieur Technik N2 - Zur Immobilisierung von Enzymen kann man Träger kaufen oder diese selbst herstellen. In früheren Arbeiten wurde ein Verfahren entwickelt, um hochporöse Kohlenstoffmaterialien in beliebigen Dimensionen herzustellen. Als Modell-Enzym zur Immobilisierung wurde die Thermomyces lanuginosus Lipase (TLL) gewählt, die adsorptiv und kovalent an das Material sowie an zwei käufliche Trägermaterialien auf Polymethacryl-Basis (Funktionalitäten: Ethylendiamin- bzw. Diolgruppen)gebunden werden sollten. Es wurden Kohlenstoffgranulat (d = 125 –200 mm) und zylindrische Monolithe (h = 4 cm; d = 1 cm) synthetisiert. Die adsorptive Immobilisierung ergab am Kohlenstoffgranulat Aktivitäten von bis zu 2,5Ug⁻¹ gegenüber p-Nitrophenyl Palmitat (pNPP). Bei den zwei käuflichen Materialien wurden Aktivitäten von bis zu 1,8Ug⁻¹ erreicht. Mit der kovalenten Immobilisierung konnten Aktivitäten von bis zu 10Ug⁻¹ am Kohlenstoffmaterial sowie dem Polymethacryl-Material (–OH funktionalisiert) gegenüber pNPP erreicht werden. Das Kohlenstoffmaterial ist ein geeigneter Träger für die TLL, der im Vergleich mit gängigen Materialien Aktivitäten in der gleichen Größenordnung zulässt. Das Porenvolumen des Materials sowie die Makroporosität könnten erhöht werden, um Diffusions- und Durchströmungsbarrieren im Monolithen abzubauen. KW - Immobilisierung Enzyme KW - poröses Kohlenstoffmaterial Y1 - 2016 U6 - https://doi.org/10.1002/cite.201650097 SN - 1522-2640 N1 - ProcessNet‐Jahrestagung und 32. DECHEMA‐Jahrestagung der Biotechnologen, Aachen, 2016 VL - 88 IS - 9 SP - S. 1243 ER - TY - RPRT A1 - Klepel, Olaf T1 - Entwicklung mikroporöser Kohlenstoffmonolithe für Anwendungen in der Luft- und Kältetechnik Y1 - 2015 U6 - https://doi.org/10.2314/GBV:870371126 N1 - Förderkennzeichen BMBF 03FH028I2 PB - Brandenburgische Technische Universität CY - Cottbus ; Senftenberg ER - TY - GEN A1 - Klepel, Olaf A1 - Taubert, Michael T1 - Attempts to design porous carbon monoliths using porous concrete as a template - Part II: Some aspects of the pore formation mechanism T2 - Microporous Mesoporous Mater Y1 - 2019 U6 - https://doi.org/10.1016/j.micromeso.2019.02.024 SN - 1387-1811 VL - 280 SP - 243 EP - 247 ER - TY - CHAP A1 - Klepel, Olaf A1 - Walter, Reni A1 - Günther, David A1 - Niebrzydowska, Paula A1 - Wach, Anna A1 - Kuśtrowski, Piotr T1 - Carbon materials prepared by template assisted routes as catalysts for oxidative dehydrogenation of ethylbenzene T2 - 5th International Sypmosium on “Carbon on Catalysis”, Books of abstracts, Bressanone/Brixen, 2012 Y1 - 2012 SP - S. 92 ER - TY - CHAP A1 - Walter, Reni A1 - Günther, David A1 - Klepel, Olaf A1 - Schilling, Thorsten A1 - Erler, Thomas A1 - Bron, Michael T1 - Carbon materials prepared by template assisted routes as catalysts for electrochemical oxygen reduction T2 - 5th International Sypmosium on “Carbon on Catalysis”, Books of abstracts, Bressanone/Brixen, 2012 Y1 - 2012 ER - TY - CHAP A1 - Taubert, Michael A1 - Beckmann, Jens A1 - Zimmermann, Jörg A1 - Lange, Andreas A1 - Enke, Dirk A1 - Klepel, Olaf T1 - Template synthesis of carbon monoliths based on porous concrete T2 - Carbon materials for ubiquitous and sustainable life : Annual World Conference on Carbon (Carbon 2014) ; Jeju, Korea, 27 June - 4 July 2014 ; [abstracts] Y1 - 2014 UR - http://www.gbv.de/dms/tib-ub-hannover/828233470.pdf SN - 9781634399050 SP - S. 511 PB - Curran CY - Red Hook, NY ER - TY - CHAP A1 - Erlitz, Marcel A1 - Danneberg, Nina A1 - Klepel, Olaf T1 - Template assisted synthesis of porous carbon: insight in the process of the carbon deposition in the template T2 - Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015 Y1 - 2015 SP - S. 21 PB - Deutsche Keramische Gesellschaft e.V. CY - Köln ER - TY - CHAP A1 - Taubert, Michael A1 - Dräger, Matti A1 - Enke, Dirk A1 - Klepel, Olaf T1 - Carbon monoliths with hierarchical pore system obtained by template assisted synthesis T2 - Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015 Y1 - 2015 SP - S. 41 PB - Deutsche Keramische Gesellschaft e.V. CY - Köln ER - TY - CHAP A1 - Utgenannt, Stephan A1 - Hansen, Felix A1 - Klepel, Olaf A1 - Jarczewski, Sebastian A1 - Wach, Anna A1 - Kustrowski, Piotr A1 - Erler, Thomas A1 - Bron, Michael T1 - A modular concept for the preparation of carbon based catalysts T2 - Carbon 2015 : innovation with carbon materials; the Annual World Conference on Carbon, Dresden, Germany, July 12 - 17, 2015 Y1 - 2015 SP - S. 294 PB - Deutsche Keramische Gesellschaft e.V. CY - Köln ER -