멤브레인 (Membrane Journal)

  • 제30권4호
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  • Pages.260-268
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  • 2020
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  • 1226-0088(pISSN)
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  • 2288-7253(eISSN)
한국막학회 (The Membrane Society of Korea)
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산소/질소 분리를 위한 다층구조 제올라이트 5A를 함유한 탄소분자체 분리막 제조

Hierarchical 5A Zeolite-Containing Carbon Molecular Sieve Membranes for O2/N2 Separation

  • 리웬 (싱가포르 난양이공대학교 화학생물공학부) ;
  • 추아총양 (싱가포르 분리막 센터) ;
  • 배태현 (싱가포르 난양이공대학교 화학생물공학부)
  • Li, Wen (School of Chemical and Biomedical Engineering, Nanyang Technological University) ;
  • Chuah, Chong Yang (Singapore Membrane Technology Centre, Nanyang Technological University) ;
  • Bae, Tae-Hyun (School of Chemical and Biomedical Engineering, Nanyang Technological University)
  • 투고 : 2020.07.16
  • 심사 : 2020.08.08
  • 발행 : 2020.08.31
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초록

다층 구조를 가진 5A 제올라이트를 탄소 분자체 분리막에 첨가한 복합막을 제조하고 질소/산소의 분리 특성을 평가하였다. 제올라이트의 첨가는 선택도에는 미세한 영향을 주지만 투과도를 크게 증가시키는 방법으로 전체적인 탄소막의 질소/산소의 분리 성능을 상승시켰다. 특히 메조포어를 함유한 다층구조의 제올라이트 첨가제는 분리막의 투과도를 보다 효율적으로 상승시켜 아주 우수한 분리 성능에 도달하였다. 이 연구의 결과는 저렴한 탄소막 전구체와 제올라이트 소재를 활용하고도 고성능의 질소/산소 분리막을 손쉽게 제조할 수 있다는 것을 제시한다.

Mixed-matrix carbon molecular sieve membranes containing conventional and hierarchically structured 5A were synthesized for application in oxygen (O2)/nitrogen (N2) separation. In general, incorporating 5A fillers into porous carbon matrices dramatically increased the permeability of the membrane with a marginal decrease in selectivity, resulting in very attractive O2/N2 separation performances. Hierarchical zeolite 5A, which contains both microporous and mesoporous domains, improved the separation performance further, indicating that the mesopores in the zeolite can serve as an additional path for rapid gas diffusion without sacrificing O2/N2 selectivity substantially. This facile strategy successfully and cost-effectively pushed the performance close to the Robeson upper bound. It produced high performance membranes based on Matrimid® 5218 polyimide and zeolite 5A, which are inexpensive commercial products.

키워드

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