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폴리이미드 중공사막을 이용한 혼합기체로부터 H2S 제거 및 CO2/CH4 분리에 관한 연구
박보령 ( Bo Ryong Park ),김대훈 ( Dae Hoon Kim ),조항대 ( Hang Dae Jo ),서용석 ( Yong Seog Seo ),황택성 ( Taek Sung Hwang ),이형근 ( Hyung Keun Lee ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.2
In this study, by using the polymeric membrane separation process, the CO2/CH4 separation and H2S removal from biogas were performed in order to CH4 purification and enrichment for the fuel cell energy source application. Fibers were spun by dry/wet phase inversion method. The module was manufactured by fabricating fibers after surface coating with silicone elastomer. The scanning electron microscopy(SEM) studies showed that the produced fibers typically had an asymmetric structure; a dense top layer supported by a porous, sponge substructure. The permeance of CO2 and CO2/CH4 selectivity increased with pressure and temperature. Mixture gas with increasing pressure and temperature, removal efficiency of the CO2 and H2S were decreased while concentration of CH4 was increased up to 100%. When retentate flow rate was increased with the decreasing of pressure and temperature the CH4 recovery ratio in retentate side was increased while the CH4 purity in retentate side was decreased.