Chemical Cogeneration in Solid Electrolyte Cells The Oxidation of to

The anodic oxidation of H2S was investigated in the solid electrolyte fuel cell H2S, Sx, SO2, Pt/ZrO2(8% Y~O3)/Pt, air operating at atmospheric pressure and temperatures 650 ~ to 800~ It was found that the fuel cell product selectivity crucially depends on the ratio M of the fluxes of oxygen anions 02_ and H2S reaching the porous Pt anode. When M < 0.33, elemental sulfur is the major product, and the anode is severely polarized. For higher M values, the product selectivity to SO2 exceeds 99% at H2S conversions as high as 99%. The cell appears to be a promising candidate for the cogeneration of electric energy and sulfur dioxide.