Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Performance Comparison of Integrated Reactor with Steam Reforming and Catalytic Combustion using Anode Off-Gas for High Temperature Fuel Cells

고온용 연료전지 미반응 가스를 이용한 촉매연소-개질 통합 반응기의 성능 비교

  • Ghang, Tae-Gyu (Department of Mechanical Mechanical Engineering, Hangyang Univ.) ;
  • Sung, Hae-Jung (Department of Mechanical Mechanical Engineering, Univ. of Science & Technology) ;
  • Lee, Sang-Min (Environment and Energy Research Division, Korea Institute of Machinery & Materials) ;
  • Ahn, Kook-Young (Environment and Energy Research Division, Korea Institute of Machinery & Materials) ;
  • Kim, Yong-Mo (Department of Mechanical Mechanical Engineering, Hangyang Univ.)
  • Received : 2011.11.30
  • Accepted : 2011.12.27
  • Published : 2011.12.31
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Abstract

The reaction characteristics of an integrated reactor with steam reformer and catalytic combustor using anode offgas for high temperature fuel cells such as MCFC and SOFC have been experimentally investigated in the present study. The coupled reactor had a coaxial cylindrical shape, and the inner and the outer tube was packed with combustion catalysts and reforming catalysts, respectively. Thus, the endothermic steam reforming could proceed by absorbing heat from catalytic combustion of anode offgas. Results show that increasing inlet temperature and decreasing excess air ratio increased the reformer temperature, which led to the increase in $H_2$ yield. The reforming performance for SOFC conditions was better than that for MCFC conditions since the composition of flammable components became smaller for MCFC cases. Measured reformate composition under various test conditions correlated well with thermal equilibrium composition.

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References

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