Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Research Trends of Polybenzimidazole-based Membranes for Hydrogen Purification Applications

수소 분리 응용을 위한 폴리벤즈이미다졸 기반 분리막의 연구 동향

  • Kim, Ji Hyeon (Department of Materials Engineering and Convergenece Technology, Engineering Research Institute, Gyeongsang National University) ;
  • Kim, Kihyun (Department of Materials Engineering and Convergenece Technology, Engineering Research Institute, Gyeongsang National University) ;
  • Nam, Sang Yong (Department of Materials Engineering and Convergenece Technology, Engineering Research Institute, Gyeongsang National University)
  • 김지현 (경상대학교 나노신소재융합공학과) ;
  • 김기현 (경상대학교 나노신소재융합공학과) ;
  • 남상용 (경상대학교 나노신소재융합공학과)
  • Received : 2020.07.17
  • Accepted : 2020.08.25
  • Published : 2020.10.12
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Abstract

As the demand for eco-friendly energy increases to overcome the energy shortage and environmental pollution crisis, hydrogen economy has been proposed as a potential solution. Accordingly, an economical and efficient hydrogen production is considered to be an essential industrial process. Research on applying hydrogen separation membranes for H2/CO2 separation to the production of highly concentrated hydrogen by purifying H2 and capturing CO2 simultaneously from synthetic gas produced by gasification is in progress nowadays. In high temperature environments, the membrane separation process using glassy polymeric membrane with H2 selectivity has the potential for CO2 capture performance, and is an energy and cost effective system since polybenzimicazole (PBI)-based separators show excellent chemical and mechanical stability under high-temperature operation conditions. Thus, the development of high-performance PBI hydrogen separators has been rapidly progressing in recent years. This overview focuses on the recent developments of PBI-based membranes including structure modified, cross-linked, blended and carbonized membranes for applications to the industrial hydrogen separation process.

에너지 부족 및 환경 오염위기를 극복하기 위해 친환경 에너지에 대한 수요가 증가함에 따라 잠재적인 해결책으로 수소 경제가 제안되고 있다. 이에 따라 경제적이고 효율적인 수소 생산은 필수적인 산업공정으로 여겨지고 있으며, 연소 전 석탄의 가스화 또는 천연가스 개질반응에 의해 생성된 합성가스에서 H2를 정제하는 동시에 CO2를 포집하는 H2/CO2 분리에 수소 분리막을 적용하는 연구가 지속되고 있다. 고온 환경에서 H2에 선택적인 유리질 고분자 막은 CO2 포집 성능의 잠재력을 갖추고 있으며, 에너지 및 비용 면에서 효율적인 시스템이다. 폴리벤즈이미다졸(PBI) 기반 수소 분리막은 고온의 구동 조건에서도 탁월한 화학적·기계적 안정성을 보여주고 있어 고 성능의 PBI 수소 분리막 개발이 최근 급속도로 진행되고 있다. 본 총설에서는 산업적으로 적용 가능성이 있는 수소 분리막 개발을 위해 PBI를 기반으로 한 구조 변형 막, 가교 막, 혼합 막, 탄화 막의 최근 발전에 대하여 중점적으로 다루고 있다.

Keywords

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