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A novel gas purification system for biologically produced gases
Authors:Franz Beggel  Isabella J Nowik  Michael Modigell  Maxim G Shalygin  Vladimir V Teplyakov  Victor B Zenkevitch
Institution:1. Aachener Verfahrenstechnik, Mechanical Process Engineering, RWTH Aachen University, Turmstr. 46, 52064 Aachen, Germany;2. A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospect 29, 119991 Moscow, Russia;3. Bioreactors and Membrane Systems, Dom Sviazi, 187110 Kirishi, Russia;1. Department of Civil and Environmental Engineering, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada;2. Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada;3. Department of Biological Sciences, Room 209, Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada;1. Department of Mechanical and Materials Engineering, McLaughlin Hall, Queen''s University at Kingston, Canada;2. Faculty of Engineering and Applied Science, Beamish-Munro Hall, Queen''s University at Kingston, Canada;3. PARTEQ Innovations, Biosciences Complex, Queen''s University at Kingston, Canada;1. Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany;2. Department of Nuclear Reactors, Czech Technical University in Prague, Thákurova 2077/7, 160 00 Prague 6-Dejvice, Czech Republic;3. Department of Nuclear Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel;1. Department of Chemical and Process Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, UK;2. School of Chemical Engineering, National Technical University of Athens, Greece
Abstract:A novel gas purification system employing membrane contactors with dense membranes in the absorption as well as the desorption unit has been tested concerning the separation efficiency of CO2. The separation efficiency of potassium carbonate (K2CO3) promoted by piperazine (PZ) as absorption medium has been tested in the absorption unit. Since the absorbent will be regenerated in the desorption unit, the influence of temperature, sweep flow rate and absorbent type (0.5 M K2CO3 and 0.5 M K2CO3/0.5 M PZ) on the separation efficiency of CO2 in the desorption unit has been investigated. Desorption by vacuum has been considered as well.In addition experimental results of the coupling of a bioreactor producing hydrogen by anoxygenic photosynthesis (low and fluctuating product gas flow rates and fluctuating compositions) with a membrane contactor for gas purification are reported. This was done in order to show the applicability of this system to processes producing biogases.
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