Sulfur tolerance of solid oxide fuel cells

K. Sasaki, K. Susuki, A. Iyoshi, M. Uchimura, N. Imamura, H. Kusaba, Y. Teraoka, H. Fuchino, K. Tsujimoto, Y. Uchida, N. Jingo

Research output: Contribution to conferencePaperpeer-review

19 Citations (Scopus)

Abstract

Influence of H2S fuel impurity on power generation characteristics of SOFCs has been analyzed by measuring cell voltage at a given current density, as a function of operational temperature, H2S concentration, and fuel gas composition. Reversible cell voltage drop was observed around 1000°C, but fatal irreversible degradation occurred at lower operational temperatures, at higher H2S concentrations, and at lower fuel H2/CO ratios. Sulfur tolerance of SOFCs improved by using Sc2O3-doped ZrO2 instead of Y2O 3-doped ZrO2 as electrolyte and/or as electrolyte component in the anode cermet. It has been found that H2S poisoning consists of at least two stages, i.e. an initial cell voltage drop within a few minutes to a metastable cell voltage, followed by a gradual larger cell voltage drop associated with the agglomeration of Ni particles.

Original languageEnglish
Pages1267-1274
Number of pages8
Publication statusPublished - 2005
Event9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada
Duration: May 15 2005May 20 2005

Other

Other9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
CountryCanada
CityQuebec
Period5/15/055/20/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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