The partial oxidation of acid gas with CH4 and CO2 was studied using Aspen Plus software.
Using pure oxygen as oxidant was favored for H2S conversion and SO2 selectivity.
The fuel rich condition with moderately high temperature is promising for the high production and selectivity of S2 and H2.
The conversion of H2S was restrained with presence of CH4 since the reaction between CH4 and S2 reproduced H2S.
Addition of CH4 would allow a wider range of equivalence ratio and higher H2 and CO production.