Region I is defined as xA xA

Possible chemical and electrochemical reactions within AP20187 SOFC fed by 0.5% H2S–CH4.No.ReactionsaΔG0[800 °C] (kJ mol−1)R1CH4(g) + 2H2S(g) ↔ CS2(g) + 4H2(g)bR2CH4(g) ↔ C + 2H2(g)bR32H2S(g) ↔ 2H2(g) + S2(g)bR4CS2(g) + O2− ↔ COS(g) + 1/2S2(g) + 2e−−199.16R51/2CS2(g) + O2− ↔ 1/2CO2(g) + 1/2S2(g) + 2e−−189.07R61/2C + O2− ↔ 1/2CO2(g) + 2e−−197.97R7H2(g) + O2− ↔ H2O(g) + 2e−−188.69R8H2S(g) + O2− ↔ 1/2S2(g) + H2O(g) + 2e−−151.12R9CH4(g) + 4O2− ↔ CO2(g) + 2H2O(g) + 8e−−800.46R10CHx[ad] + S2(g) ↔ CS2(g) + xH[ad]R11CS[ad] + O2− ↔ COS + 2e−R12H2S(g) + 3O2− (g) ↔ SO2(g) + H2O(g) + 6e−−434.695R13S2(g) + 4O2− (g) ↔ 2SO2(g) + 8e−−567.15aThermodynamic data of O2(g) were used.bCreactants >> Cproducts making ΔG0 not a oxidation good reference in predicting reaction directions.Full-size tableTable optionsView in workspaceDownload as CSV