Effects of H<sub>2</sub>S on the Performance of MCFC II. Behavior of Sulfur in the Cell

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  • MCFC特性に対するH<sub>2</sub>Sの影響II．電池内での硫黄成分の挙動
  • MCFC特性に対するH2Sの影響(2)電池内での硫黄成分の挙動
  • MCFC トクセイ ニ タイスル H2S ノ エイキョウ 2 デンチ ナイ デ ノ イオウ セイブン ノ キョドウ

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Abstract

<p>To evaluate the effects of H2S on the performance of MCFC, the bench-scale cell tests and the half-cell tests were performed with fuel gas containing several levels of H2S. The behaviors of sulfur compounds in the cell depend on the absorption of S on anode Ni and the solubility of H2S by electrolyte. The solubility of H2S by electrolyte relates to partial pressure of gas composition according to H2S+CO32−+3H2O=CO2+4H2+SO42− and the current density. The higher the current density is, the lower the content of sulfate and / or sulfide ion in electrolyte is. Because the distribution of sulfate and / or sulfide ion depends on the convection of carbonate ion. In addition, the diffusion coefficients of sulfur in molten carbonate mixtures are derived from the bench-scale cell tests and the half-cell tests. The difference of these diffusion coefficients is discussed.</p>

Journal

  • Electrochemistry

    Electrochemistry 67 (4), 364-371, 1999-04-05

    The Electrochemical Society of Japan

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