Indirect internal reforming SOFC accommodating graded-catalytic domain fabricated by paper-structured catalyst


AYDIN Ö. , Matsumoto G., Kubota A., Tran D., Sakamoto M., Shiratori Y.

16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019, Kyoto, Japan, 8 - 13 September 2019, vol.91, pp.1631-1640 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 91
  • Doi Number: 10.1149/09101.1631ecst
  • City: Kyoto
  • Country: Japan
  • Page Numbers: pp.1631-1640

Abstract

© The Electrochemical Society.Biogas can be directly utilized in Solid Oxide Fuel Cells (SOFCs), as it can be reformed to H2-rich mixture in the anode of SOFCs. However, the rate of reforming reaction significantly changes along the flow field due to the rapid conversion of CH4 in the inlet region. Since the reforming reactions are endothermic, a dramatic temperature gradient develops along the flow field, resulting in thermal stresses on the adjacent SOFC components. Taking the reforming reactions out of SOFC domain by indirect internal reforming reduces the thermal stresses to an extent, which can be further mitigated by designing a graded catalytic domain for an even temperature distribution. In this study, we demonstrate a reliable and durable operation of SOFC equipped with an indirect internal reformer graded in terms of catalyst loading.