Perovskite catalysts for hydrogen production from hydrogen sulfide

The optimum Cr:Co ratio was found to be 0.33 at 950 °C where maximum equilibrium conversion of 36.3% was achieved with La0.9Sr0.1Cr0.25Co0.75O3. The perovskite involving Mo had a similar catalytic performance of 35.2%, at 950 °C. Direct thermal decomposition of hydrogen sulfide showed only 5.5% and 22.4% conversions at 900 °C and 950 °C respectively, which were far below the corresponding conversion values achieved with catalysts.