Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Multi-stage Process Study of PEI-PDMS Hollow Fiber Composite Membrane Modules for $H_2/CO_2$ Mixed Gas Separation

$H_2/CO_2$ 혼합기체의 분리를 위한 PEI-PDMS 중공사 복합막 모듈의 다단 공정 연구

  • Lee, Chung Seop (Department of Chemical Engineering & Nano-Bio Technology, College of Life Science & Nano Technology, Hannam University) ;
  • Cho, Eun Hye (Department of Chemical Engineering & Nano-Bio Technology, College of Life Science & Nano Technology, Hannam University) ;
  • Ha, Seong Yong (Airrane Co. Ltd.) ;
  • Chung, Jong Tae (Gas Resources Technology Center, Korea Gas Corporation R&D Division, Korea Gas Corporation Co. Ltd.) ;
  • Rhim, Ji Won (Department of Chemical Engineering & Nano-Bio Technology, College of Life Science & Nano Technology, Hannam University)
  • 이충섭 (한남대학교 대덕밸리캠퍼스 생명.나노과학대학 나노생명화학공학과) ;
  • 조은혜 (한남대학교 대덕밸리캠퍼스 생명.나노과학대학 나노생명화학공학과) ;
  • 하성용 ((주)에어레인) ;
  • 정종태 (한국가스공사 연구개발원) ;
  • 임지원 (한남대학교 대덕밸리캠퍼스 생명.나노과학대학 나노생명화학공학과)
  • Received : 2012.11.20
  • Accepted : 2013.02.05
  • Published : 2013.02.28
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Abstract

Poly(ether imide) (PEI)-poly(dimethylsioxane) (PDMS) composite membranes and their modules were prepared, which are capable of selective $CO_2$ separation from the mixture gas. The gas flow rate, concentration, recovery ratio of $H_2$ and removal ratio of $CO_2$ outflowing by stage-cut were characterized at $25^{\circ}C$ and the constant pressure. In addition, to increase the recovery ratio of $H_2$, one stage, two stage series connection, and three stages series + parallel connection tests were carried out. When the stage-cut was 0.32 for the three stages connection operation, the concentration $H_2$ of the produced gas and the recovery ratio of $H_2$ was 97% and 85%, respectively. And also the removal ratio of $CO_2$ was 90% was obtained and the recycled gas concentration was similar with that of the feed gases.

혼합가스에서 $CO_2$를 선택적으로 분리할 수 있는 poly (etherimide) (PEI)-poly (dimethylsioxane) (PDMS) 재질의 복합막 및 모듈을 제조하여 $CO_2/H_2$ 분리특성을 확인하였다. 제조된 중공사 복합막 모듈은 모듈의 단수에 따라 $25^{\circ}C$, 일정 압력에서 stage-cut별로 분리된 가스의 유량, 농도, $H_2$ 회수율, $CO_2$ 제거율 등의 성능을 측정하였으며, $H_2$ 회수율을 높이기 위해 1단 시험에서 2단 직렬시험과 3단 직렬 + 병렬 시험으로 단수를 증가시켜 시험하였다. 각각의 운전조건에 대한 결과들을 확인한 결과 3단 운전조건에서 stage-cut을 0.32로 하였을 때 Product가스의 $H_2$ 농도는 97%이었으며 그때의 $H_2$ 회수율은 85%이었다. 또한, $CO_2$ 제거율은 약 90%의 결과를 얻을 수 있었으며 재순환 가스의 농도는 공급 가스와 유사하게 얻을 수 있었다.

Keywords

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