Thermodynamic analysis of methane-fueled solid oxide fuel cells considering co electrochemical oxidation

Qiong Sun, Keqing Zheng, Meng Ni

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Thermodynamic analyses in the literature have shown that solid oxide fuel cells (SOFCs) with proton conducting electrolyte (H-SOFC) exhibited higher performance than SOFC with oxygen ion conducting electrolyte (O-SOFC). However, these studies only consider H2 electrochemical oxidation and totally neglect the contribution of CO electrochemical oxidation in O-SOFC. In this short communication, a thermodynamic model is developed to compare the theoretically maximum efficiencies of H-SOFC and O-SOFC, considering the electrochemical oxidation of CO in O-SOFC anode. It is found that O-SOFC exhibits a higher maximum efficiency than H-SOFC due to the contribution from CO electrochemical oxidation, which is contrary to the common understanding of electrolyte effect on SOFC performance. The effects of operating temperature and fuel utilization factor on the theoretical efficiency of SOFC are also analyzed and discussed.
Original languageEnglish
Pages (from-to)1033-1037
Number of pages5
JournalChinese Journal of Chemical Engineering
Volume22
Issue number9
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • Hydrocarbon fuels
  • Oxygen ion conductor
  • Proton conductor
  • Solid oxide fuel cell
  • Thermodynamics

ASJC Scopus subject areas

  • Environmental Engineering
  • Chemistry(all)
  • Biochemistry
  • Chemical Engineering(all)

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