Equilibria in fuel cell gases. I. Equilibrium compositions and reforming conditions

K. Sasaki, Y. Teraoka

Research output: Contribution to journalArticlepeer-review

190 Citations (Scopus)


Using thermochemical data of ca. 300 compounds consisting of carbon, hydrogen, and oxygen, the amounts of equilibrium products have been calculated for various fuel cell fuels including alkanes (CH4, C3H8, C8H18, C12H26), alcohols (CH3OH, C2H5OH, C3H7OH), alkenes, alicyclic hydrocarbons, and dimethyl ether, as well as for other hydrocarbon-containing fuels such as biogas and coke oven gas, in the temperature range between 100 and 1000°C. It has been revealed that the major constituents in typical fuel cell gases in thermodynamic equilibrium are H2(g), H2O(g), CO(g), CO2(g), CH4(g), and C(s). Possible minor constituents are specified while their concentrations were negligibly low. Derived are the minimum amounts of H2O and CO2 for reforming and O2 for partial oxidation, thermodynamically essential to prevent carbon deposition.

Original languageEnglish
Pages (from-to)A878-A884
JournalJournal of the Electrochemical Society
Issue number7
Publication statusPublished - Jul 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry


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