Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Effect of Carbonization Conditions on Gas Permeation of Methyl Imide Based Carbon Molecular Sieve Hollow Fiber Membranes

탄화조건이 메틸이미드계 탄소 분자체 중공사 분리막의 기체 투과특성에 미치는 영향 연구

  • Seong, Ki Hyeok (Graduate School of Green Energy Technology, Chungnam National University) ;
  • Song, Ju Sub (Graduate School of Green Energy Technology, Chungnam National University) ;
  • Koh, Hyung Chul (Airrane Co. Ltd.) ;
  • Ha, Seong Yong (Airrane Co. Ltd.) ;
  • Han, Moon Hee (Graduate School of Green Energy Technology, Chungnam National University) ;
  • Cho, Churl Hee (Graduate School of Green Energy Technology, Chungnam National University)
  • 성기혁 (충남대학교 녹색에너지기술전문대학원) ;
  • 송주섭 (충남대학교 녹색에너지기술전문대학원) ;
  • 고형철 ((주)에어레인) ;
  • 하성용 ((주)에어레인) ;
  • 한문희 (충남대학교 녹색에너지기술전문대학원) ;
  • 조철희 (충남대학교 녹색에너지기술전문대학원)
  • Received : 2013.10.03
  • Accepted : 2013.10.09
  • Published : 2013.10.31
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Abstract

In the present study, carbon molecular sieve (CMS) hollow fiber membranes were prepared by carbonizing a methyl imide hollow fiber precursor, which was spun by non-solvent induced phase separation process. And effects of carbonization parameters such as pre-oxidation, pyrolysis, and post-oxidation on the gas permeation were systematically investigated. CMS membrane having the highest gas flux was obtained by carbonizing the precursor through a combined process of air pre-oxidation at $250^{\circ}C$ for 2h, nitrogen pyrolysis at $550^{\circ}C$ for 2h, and oxygen post-oxidation at $250^{\circ}C$ for 2h. The optimized membrane showed a considerable gas permeance : the $H_2$, He, $CO_2$ permeances were 69.72, 35.61, 31.01 GPU, respectively, and the $O_2$ and $N_2$ permeances were ignorable. Therefore, it was clear that the prepared CMS hollow fiber membrane was a promising membrane for recovering small gases such as hydrogen and hellium and carbon dioxide.

본 연구에서는 Matrimid-5218로부터 메틸이미드 중공사 전구체를 비용매 유도 상분리법으로 제조한 후에 탄화시켜 탄소 분자체 중공사 분리막을 제조하였으며 전처리, 열분해, 후처리 공정이 탄소 분자체 중공사 분리막의 기체 투과 특성에 미치는 영향을 살펴보았다. $250^{\circ}C$에서 2시간 공기 중에서 전처리하고, $550^{\circ}C$에서 2시간 질소 분위기에서 열분해한 후, $250^{\circ}C$에서 2시간 공기 중에서 후처리할 때에 가장 높은 기체 투과특성을 갖는 분리막이 제조되었다. 제조된 탄소 분리막은 $H_2$, He, $CO_2$ 투과도가 69.72, 35.61, 31.01 GPU이었으며 $O_2$, $N_2$ 가스는 거의 투과하지 않았다. 따라서 제조된 탄소분자체 중 공사 분리막은 $H_2$, He 등 작은 분자 기체와 $CO_2$ 회수용 분리막으로서 우수한 소재임을 확인할 수 있었다.

Keywords

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