화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.20, No.4, 425-432, December, 2014
Export Citation
Feasibility Study of Employing a Catalytic Membrane Reactor for a Pressurized CO2 and Purified H2 Production in a Water Gas Shift Reaction
Hankwon Lim†
  • Department of Chemical Systematic Engineering, Catholic University of Daegu, 13-13 Hayang-ro, Hayang-yep, Gyeongsan-si, Gyeongbuk 712-702, Korea
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초록
이 논문은 촉매막반응기(catalytic membrane reactor)에서의 중요한 두 요소인 수소선택도와 수소투과량 및 Ar sweep 유량과 압력이 수성가스전이반응의 성능에 미치는 영향에 대하여 1차원 반응기모델과 반응속도식에 근거한 연구결과를 나타내고 있다. 연소전 이산화탄소 포집의 한 방법으로서, 촉매막반응기를 사용하여 원통부분에서는 고압/고농도의 이산화탄소를 관부분에서는 고순도의 수소를 동시에 얻을 수 있는지에 대한 가능성을 검토하였다. 또한, 고농도의 이산화탄소와 고순도의 수소를 동시에 얻기 위해 필요한 수소투과량, 수소선택도, Ar sweep 유량 및 압력에 대한 지침을 나타내었다. 그 결과 1 × 10-8 molm-2s-1Pa-1의 수소투과량과 10000의 수소선택도를 가진 막을 장착한 촉매막반응기에서는 8 atm의 압력과 6.7 × 10-4 mols-1의 Ar sweep 유량의 조건하에서 약 90%의 농도를 가진 이산화탄소와 100%의 순도를 가진 수소가 동시에 얻어짐이 밝혀졌다.
The effect of two important parameters of a catalytic membrane reactor (CMR), hydrogen selectivity and hydrogen permeance, coupled with an Ar sweep flow and an operating pressure on the performance of a water gas shift reaction in a CMR has been extensively studied using a one-dimensional reactor model and reaction kinetics. As an alternative pre-combustion CO2 capture method, the feasibility of capturing a pressurized and concentrated CO2 in a retentate (a shell side of a CMR) and separating a purified H2 in a permeate (a tube side of a CMR) simultaneously in a CMR was examined and a guideline for a hydrogen permeance, a hydrogen selectivity, an Ar sweep flow rate, and an operating pressure to achieve a simultaneous capture of a concentrate CO2 in a retentate and production of a purified H2 in a permeate is presented. For example, with an operating pressure of 8 atm and Ar sweep gas for rate of 6.7 × 10-4 mols-1, a concentrated CO2 in a retentate (~90%) and a purified H2 in a permeate (~100%) was simultaneously obtained in a CMR fitted with a membrane with hydrogen permeance of 1 × 10-8 mol m-2s-1Pa-1 and a hydrogen selectivity of 10000.
Keywords:Catalytic membrane reactor;Water gas shift reaction;Pre-combustion CO2 capture;Hydrogen selectivity;Hydrogen permeance
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