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The Membrane Society of Korea (한국막학회)
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Gas Separation Properties and Their Applications of High Permeable Amorphous Perfluoropolymer Membranes

고투과성 무정형 불소고분자 불리막의 기체분리 특성 및 응용

  • Freeman, Benny D. (Department of Chemical Engineering, Center for Energy and Environmental Resources, University of Texas at Austin) ;
  • Park, Ho-Bum (Department of Chemical Engineering, Center for Energy and Environmental Resources, University of Texas at Austin)
  • 베니 프리만 (미국 오스틴 텍사스 주립대학교 화학공학과) ;
  • 박호범 (미국 오스틴 텍사스 주립대학교 화학공학과)
  • Published : 2007.06.30
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Abstract

Membrane-based separation processes are receiving increasing attention in the scientific community and industry since they provide a desirable alternative to processes that are not easy to achieve by conventional separation technologies. In particular, gas separation using polymeric membranes have annually grown so fast owing to advantages such as easy installation, no moving parts, small footprint and low energy process. The key element is definitely a polymer membrane exhibiting high permeability and high selectivity to compete with other gas separation technologies. Current polymer membranes used for commercial gas separation are a family of hydrocarbon polymers for hydrogen separation, air separation and carbon dioxide separation from natural gas sweetening. Relatively, gas or vapor separation properties of fluoropolymers are not known so much as compared with those of hydrocarbon polymers. Accordingly, in this study, membranes prepared from amorphous perfluoropolymers are of particular interest because of the unique properties of these polymers. The advantages offered by these amorphous perfluoropolymers for use in gas and vapor separation will be discussed. In addition, membrane properties and separation performance will be compared with other membranes available on the market.

막 분리공정은 기존의 분리공정이 달성하기 쉽지 않은 많은 공정들을 대체할 수 있기 때문에 관련 학계나 산업체에서 많은 관심을 받고 있다. 특히, 고분자막을 이용한 기체분리공정은 해마다 가파른 성장세를 보이는데 이는 주로 기존의 기체분리공정에 비해 설치가 용이하고 분리공정에 필요한 에너지를 절약할 수 있기 때문이다. 고분자막을 이용한 기체분리의 가장 중요한 요소는 물론 뛰어난 선택적 투과성을 가지는 소재의 개발에 있다. 현재 상업적으로 쓰이고 있는 대부분의 기체분리용 고분자막을 폴리술폰, 폴리카보네이트 및 폴리이미드와 같은 탄화수소계열의 고분자소재이며, 이들은 수소분리, 산소부화, 천연가스에서 이산화탄소분리 등 다양한 용도로 사용되고 있다. 이와는 상대적으로 불소고분자막들에 대한 기체분리특성은 탄화수소계열의 고분자막에 비교하여 그다지 많이 알려지지는 않았다. 따라서 본 논문에서는 무정형 불소고분자로부터 제조된 고분자막에 대한 기체 및 증기분리특성에 대해 자세하게 살펴보고자 한다. 이러한 불소고분자들은 종종 기존의 탄화수소계열의 고분자막과는 상이한 기체 투과 및 분리특성을 보이며, 따라서 본 논문에서는 이러한 기체분리거동을 활용한 적용방안에 대해서도 알아보고자 한다.

Keywords

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