Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Minimization of Carbon Monoxide in the High Efficient Catalytic Shift for Fuel Cell Applications

연료전지용 고효율 촉매전이 반응의 일산화탄소 저감

  • Park, Heon (BK21 Team for Hydrogen Production, Department of Environmental Engineering, Chosun University) ;
  • Kim, Seong-Cheon (BK21 Team for Hydrogen Production, Department of Environmental Engineering, Chosun University) ;
  • Chun, Young-Nam (BK21 Team for Hydrogen Production, Department of Environmental Engineering, Chosun University)
  • 박헌 (조선대학교 환경공학부.BK21 바이오가스기반 수소생산 사업팀) ;
  • 김성천 (조선대학교 환경공학부.BK21 바이오가스기반 수소생산 사업팀) ;
  • 전영남 (조선대학교 환경공학부.BK21 바이오가스기반 수소생산 사업팀)
  • Published : 2007.05.31
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Abstract

The generation of high-purity hydrogen from hydrocarbon fuels is essential for efficient operation of fuel cell. In general, most feasible strategies to generate hydrogen from hydrocarbon fuels consist of a reforming step to generate a mixture of $H_2$, CO, $CO_2$ and $H_2O$(steam) followed by water gas shift(WGS) and CO clean-up steps. The WGS reaction that shifts CO to $CO_2$ and simultaneously produces another mole of $H_2$ was carried out in a two-stage catalytic conversion process involving a high temperature shift(HTS) and a low temperature shift(LTS). In the WGS operation, gas emerges from the reformer is taken through a high temperature shift catalyst to reduce the CO concentration to about $3\sim4%$ followed to about 0.5% via a low temperature shift catalyst. The WGS reactor was designed and tested in this study to produce hydrogen-rich gas with CO to less than 0.5%.

탄화수소계열의 연료로부터 고순도 수소를 생산하는 것은 연료전지의 효율적인 운전과 밀접하다. 일반적으로 대부분의 탄화수소연료에서 수소를 생산하는 과정은 수소, 일산화탄소, 이산화탄소와 수증기혼합물이 생성되는 개질과정 및 일산화탄소를 저감하는 전이반응과 선택적 산화반응 과정으로 구성되어있다. 전이반응은 일산화탄소를 이산화탄소로 전환하는 동시에 수소가 생성되는 고온전이와 저온전이로 구성된 두 단계의 촉매전환 공정이다. 전이반응은 개질가스를 고온전이 반응에서 일산화탄소를 $3\sim4%$까지 낮추며 저온전이 반응에서 0.5%까지 저감한다. 본 연구에서 개질가스 중 일산화탄소를 0.5% 이하로 저감하기 위하여 전이반응기 설계 및 실험을 진행하였다.

Keywords

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