Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Facilitated Transport Separation of Carbon Dioxide Using Aminated Polyetherimide Membranes

아민화된 폴리이서이미드 막을 이용한 이산화탄소의 촉진수송분리

  • Kwon, Se Hwan (Department of Chemical Engineering, Hannam University) ;
  • Rhim, Ji Won (Department of Chemical Engineering, Hannam University)
  • 권세환 (한남대학교 대덕밸리캠퍼스 화학공학과) ;
  • 임지원 (한남대학교 대덕밸리캠퍼스 화학공학과)
  • Received : 2015.05.27
  • Accepted : 2015.06.12
  • Published : 2015.06.30
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Abstract

Aminated polyetherimide membrane synthesized in the laboratory according to amine ratio was used for measurement of gas permeability, diffusivity, and solubility about carbon dioxide, nitrogen, methane, oxygen, and sulfur dioxide with Time-lag method at room temperature. Generally, gas permeability is totally decreased because the more amination rate reacted to the main chain of amine groups, the more intermolecular space became narrow. However, gas permeability of sulfur dioxide was increased due to combination of sulfur dioxide and amine groups have acid and base properties respectively. Diffusivity and solubility of dry gas are totally decreased excluding sulfur dioxide as increasing amination rate. In case of sulfur dioxide, however, diffusivity as well as solubility was increased as increasing amination rate. Selectivity of carbon dioxide/nitrogen showed 60 when amination rate was 3. In case of humid gas, gas permeability of carbon dioxide was 70 barrer when relative humidity showed 100, and selectivity with nitrogen approximately showed 18.

아민화된 폴리이서이미드(polyetherimide (PEI))막을 실험실에서 합성하여 아민화별로 제조된 막을 이용하여 이산화탄소, 질소, 메탄, 산소, 이산화황의 기체투과도와 확산도 및 용해도를 Time-lag법으로 상온에서 측정하였다. 일반적으로 아민기의 주사슬에 반응되는 아민화율이 증가할수록 분자사이의 공간이 좁아지기 때문에 투과도가 전체적으로 감소했지만, 이산화황은 산 성질의 이산화황과 염기 성질의 아민기의 결합으로 인하여 증가하였다. 건기체에 대한 확산도 및 용해도는 아민화율이 증가할수록 이산화황을 제외한 모든 기체에서 감소하였고 또한 용해도 역시 감소하였다. 그러나 이산화황의 경우 아민화율이 증가하면서 용해도가 증가하게 되어 확산도 또한 증가한 것으로 사료된다. 이산화탄소/질소의 경우 선택도는 아민화율이 3일 경우 60을 나타내었다. 습기체의 경우 상대습도가 100일 때 투과도가 70 barrer을 나타내었고 질소에 대한 선택도는 약 18 정도를 보여주었다.

Keywords

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