TY - CHAP A1 - Schnitzlein, Klaus T1 - Modelling Radial Dispersion in Terms of the Local Structure of Packed Beds T2 - Chemical reaction engineering beyond the year 2000, 16th International Symposium on Chemical Reaction Engineering, Cracow, Poland, 10 - 13 September 2000 Y1 - 2000 SN - 83-90415-14-3 SP - 74 EP - 75 CY - Gliwice ER - TY - CHAP A1 - Schnitzlein, Klaus A1 - Thies, Jens T1 - Reassessment of the concentration controlled recycle reactor for kinetic investigations of heterogeneous catalytic reactions T2 - ECCE - 3rd European Congress of Chemical Engineering, Nuremberg 26 - 28 June 2001 Y1 - 2001 PB - DECHEMA CY - Frankfurt am Main ER - TY - CHAP A1 - Thies, Jens A1 - Schnitzlein, Klaus T1 - Kinetische Untersuchungen von Reaktionssystemen mit inhibierenden Komponenten: Der Einfluß des Wassers bei der Methanoloxidation am Fe/Mo-Kontakt T2 - 3. Merseburger Fachtagung Automatisierung, Meßmethoden und Experimente in der chemischen Reaktionstechnik Y1 - 1997 PB - Verein Deutscher Ingenieure CY - Düsseldorf ER - TY - CHAP A1 - Limberg, Carsten A1 - Schnitzlein, Klaus T1 - Computergenerierte Modellschüttungen - eine Alternative zur experimentellen Ermittlung der lokalen Struktur von Partikelschüttungen T2 - Corrosion monitoring - damit ein Schaden erst gar nicht entsteht, Dechema Jahrestagung Wiesbaden 11. und 12. November 2003 Y1 - 2003 SN - 3-935406-08-8 SP - 305 EP - 307 PB - GfKORR CY - Frankfurt am Main ER - TY - CHAP A1 - Schwidder, Sabine A1 - Schnitzlein, Klaus T1 - Vorhersage des lokalen statischen Holdups in Rieselbettreaktoren T2 - Jahrestreffen Reaktionstechnik 2009, 8. - 10. Juni 2009, Festung Marienberg, Würzburg Y1 - 2009 PB - DECHEMA CY - Frankfurt am Main ER - TY - CHAP A1 - Schwidder, Sabine A1 - Schnitzlein, Klaus T1 - Prediction of liquid flow distribution in trickle bed reactors in terms of liquid/solid properties T2 - PRES 2010, CHISA 2010, 7th European Congress of Chemical Engineering, ECCE-7, 28 Aug. - 1 Sept. 2010, Prague, Czech Republic Y1 - 2010 SN - 978-88-956080-5-1 PB - AIDIC Servizi S.r.l CY - Milano ER - TY - CHAP A1 - Huddar, Mahesh M. A1 - Schnitzlein, Klaus A1 - Stahmann, Klaus-Peter A1 - Barig, Susann T1 - Slug Flow Capillary Reactor for Enzymatic Hydrolysis T2 - Tagungshandbuch, Vortrags- und Diskussionstagung Biokatalyse: Neue Verfahren, Neue Produkte, 18. - 20. Mai 2009, Bad Schandau Y1 - 2009 PB - DECHEMA CY - Frankfurt a. M. ER - TY - CHAP A1 - Krautwald, Judith A1 - Schnitzlein, Klaus T1 - Thermogravimetrie-Reaktor fuer reaktionstechnische Untersuchungen in konventionellen Thermowaagen bei definierten Stroemungsverhaeltnissen T2 - Tagungshandbuch, Jahrestreffen Reaktionstechnik 2008, 18. - 20. Mai 2008, Festung Marienberg, Würzburg Y1 - 2008 PB - DECHEMA CY - Frankfurt am Main ER - TY - CHAP A1 - Schwidder, Sabine A1 - Heinzelmann, Norbert A1 - Schnitzlein, Klaus T1 - Interactive simulation program for the analysis and design of trickle bed reactors T2 - CAMURE 8 & ISMR 7, Naantali, Finland, May 22-25, 2011 Y1 - 2011 SN - 978-952-12-2586-4 PB - Åbo Akademi University CY - Turku ER - TY - CHAP A1 - Schwidder, Sabine A1 - Schnitzlein, Klaus T1 - Predicting the static liquid holdup in trickle bed reactors in terms of the local structure of the packed bed T2 - ISCRE 21, 21st International Symposium on Chemical Reaction Engineering, Sunday, June 13 - Wednesday, June 16, 2010, Philadelphia, PA, USA Y1 - 2010 UR - http://www.iscre.org/iscre21/abstracts/96.pdf ER - TY - CHAP A1 - Muth, Marco A1 - Schmid, Reiner P. A1 - Schnitzlein, Klaus T1 - Specific modifications to enhance sensitivity in null-ellipsometry T2 - Book of abstracts, 8th Workshop Ellipsometry, March 10 - 12, 2014, Dresden, Germany Y1 - 2014 UR - http://www.ipfdd.de/fileadmin/user_upload/ax/OEA/8th_Workshop_Ellipsometry/Book%20of%20abstracts.pdf SP - S. 84 ER - TY - CHAP A1 - Muth, Marco A1 - Schmid, Reiner P. A1 - Schnitzlein, Klaus T1 - Einfache Methode zur Steigerung der Empfindlichkeit in Null-Ellipsometrie T2 - DPG Frühjahrstagung 2013 in Regensburg Y1 - 2013 UR - http://www.dpg-verhandlungen.de/year/2013/conference/regensburg/part/ds/session/30/contribution/10 PB - DPG CY - Bad Honnef ER - TY - CHAP A1 - Hundt, Martin A1 - Schnitzlein, Michael G. A1 - Schnitzlein, Klaus T1 - Alkaline polyol pulping - a new process for utilization of lignocellulose as feedstock T2 - Proceedings, 11th European Workshop on Lignocellulosics and Pulp, August 16 - 19, 2010, Hamburg, Germany Y1 - 2010 SP - 333 EP - 336 PB - vTI CY - Hamburg ER - TY - CHAP A1 - Hundt, Martin A1 - Schnitzlein, Klaus T1 - The impact of pulp properties on the performance of enzymatic hydrolysis T2 - Italic 6, Science & Technology of biomasses: Advances and Challenges - Proceedings Y1 - 2011 SN - 978-88-95688-65-7 SP - 331 EP - 334 ER - TY - CHAP A1 - Schwidder, Sabine A1 - Schnitzlein, Klaus T1 - Analysis of liquid flow distribution and dispersion in trickle bed reactors - experiments and simulation T2 - CAMURE 8 & ISMR 7, Naantali, Finland, May 22-25, 2011 Y1 - 2011 SN - 978-952-12-2586-4 PB - Åbo Akademi University CY - Turku ER - TY - CHAP A1 - Schröter, Sandra A1 - Schnitzlein, Klaus T1 - Macrokinetic Analysis of Liquid-Liquid-Interfacial-Reactions in a Slug Flow Reactor T2 - Jahrestreffen Reaktionstechnik 2017, Würzburg, 2017 N2 - Interfacial reactions occur in heterogeneous reaction systems in which two immiscible phases containing the reactants are brought into contact. The catalyst is located at the phase boundary surface, so it is advantageous for high yields to generate a large interfacial area. Microreactors offer a possibility for this, they are characterized by their enhanced mass transfer, which leads to process intensification. Furthermore, here it is possible to optimize processes on a small scale and with little time effort. The fields of application range from reactive extraction of organic compounds over polycondensation to hydrolysis of esters. The slug-flow reactor used in this study is a micro scale capillary in which an aqueous phase and an organic phase are conveyed forming a continuous and a dispersed phase. This results in a high surface-to-volume ratio, which is predestined for the enzymatic reactions at interfaces. In the present study, a lipase from Thermomyces lanuginosus is bound to the interface, it is a water-soluble interface-active enzyme capable of cleaving the ester bond of triglycerides. However, the enzymatic hydrolysis is limited by mass transport and benefits from the accelerated supply and removal of the reaction species to or from the interface. A further influencing factor besides the mass transport is, however, the shear stress at the interface, which has a negative effect on the enzyme activity.1 The aim is to demonstrate these opposing effects and to analyze the macrokinetic, which includes the interactions of chemical reaction (microkinetics) and mass transport. Measurements were carried out at different flow velocities. In addition, the organic phase (rapeseed oil) and the aqueous phase (buffer with enzyme) could be adjusted as the continuous and the disperse phase or vice versa by selecting different capillary materials. As shown in a previous study, different flow profiles will be generated. Finally, the surfacespecific hydrolysis rate was determined from the measured fatty acid concentration and the calculated interfacial area. The oil or water sided flow profiles have an hugh effect on overall hydrolysis rate. So the overall hydrolysis rate increases when mass transfer in oleic phase is enhanced by choosing it as continuous phase, this could even compensate the negative effect of shear stress in aqueous phase.1 Furthermore, the flow profiles in the Slug-Flow Reactor can also be modeled very well in the CFD simulation. So this numerical study serves as an important basis for the explanation of the occuring phenomenons. KW - Liquid Liquid Slug Flow KW - Mass transport limitation KW - Thermomyces lanuginosus Lipase KW - Rapeseed oil Y1 - 2017 U6 - https://doi.org/10.13140/RG.2.2.14159.38564 ER -