Analysis of chemical, electrochemical reactions and thermo-fluid flow in methane-feed internal reforming SOFCs: Part II-temperature effect

Joonguen Park, Peiwen Li, Joongmyeon Bae

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

In order to study the heat and mass transfer characteristics of direct internal reforming solid oxide fuel cells (DIR SOFCs), this research conducted a 3D numerical simulation to a large single cell having an active area of 25 cm 2 with parallel fuel and air flow channels. Reaction rate distributions by the chemical kinetics models are presented as numerical results. The electrochemical oxidations of carbon monoxide and hydrogen were both considered to contribute to the fuel cell local current densities. The average current density contributed by carbon monoxide was found being as high as 568.7 A/m 2 under an operation temperature of 850°C, which was 10 times greater than that under a temperature of 650°C. When considering the current density contributed by electrochemical reaction of hydrogen, an average current density of 7949.2 A/m 2 was seen at the temperature of 850°C. The total average current density under operating temperature of 650°C was as high as 3802.9 A/m 2, and it increased to 8517.9 A/m 2 under an operating temperature of 850°C. The effect of the inlet fuel and air temperature to the maximum and average current densities due to electrochemical reactions of carbon monoxide and hydrogen were also investigated.

Original languageEnglish (US)
Pages (from-to)8532-8555
Number of pages24
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number10
DOIs
StatePublished - May 2012

Keywords

  • 3D numerical modeling
  • Chemical kinetics
  • Electrochemical reactions
  • Heat and mass transfer
  • Planar type internal reforming solid oxide fuel cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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