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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2022.32.2.140

Highly Efficient Biogas Upgrading Process Using Polysulfone Hollow Fiber Membrane at Low Temperature  

Kim, Se Jong (Airrane Co. Ltd)
Han, Sang Hoon (Airrane Co. Ltd)
Yim, Jin Hyuk (Airrane Co. Ltd)
Lee, Chung Seop (Airrane Co. Ltd)
Chang, Won Seok (Korea District Heating Corporation (KDHC))
Kim, Gill Jung (Korea District Heating Corporation (KDHC))
Ha, Seong Yong (Airrane Co. Ltd)
Publication Information
Membrane Journal / v.32, no.2, 2022 , pp. 140-149 More about this Journal
Abstract
In this study, the conditions of low temperature and high pressure of biogas upgrading process using polysulfone membrane have been designed and tested to achieve the high recovery and efficiency corresponding to those of the highly selective polymeric materials. Polysulfone hollow fiber membrane with 4-component dope solution was spun via non-solvent induced phase separation. The hollow fiber membrane was mounted into a 1.5 inch housing. The effective area was 1.6 m2, and its performance was examined in various operation temperatures and pressures. CO2 and CH4 permeances were 412 and 12.7 GPU at 20℃, and 280 and 3.6 GPU at -20℃, respectively, while the CO2/CH4 selectivity increased from 32.4 to 77.8. Single gas test was followed by the mixed gas experiments using single-stage and double stage where the membrane area ratio varied from 1:1 to 1:3. At the single-stage, CH4 purity increased and the recovery decreased as the stage-cut increased. At the double stage, the area ratio of 1:3 showed the higher CH4 recovery as decreasing the operation temperature at the same purity of CH4 97%. Finally, polysulfone hollow fiber membranes have yielded of both CH4 purity and recovery of 97% at -20℃ and 16 barg.
Keywords
biogas upgrading; hollow fiber membrane; gas separation; biomethane; multi-stage process;
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Times Cited By KSCI : 1  (Citation Analysis)
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