Decomposition of Hydrogen Sulfide over Supported Molybdenum Sulfide Catalysts

Abstract

The catalytic adtivities, promotive effect and carrier effect of sulfided Mo based hydrodesulfurization catalysts and supported MoS₂ catalysts in the decomposition of hydrogen sulfide were examined at 773 K using a closed circulation system. Sulfided CoMo/Al₂O₃ catalyst and MoS₂ catalyst supported on γ-Al₂O₃ showed the highest activities among the Mo based hydrodesulfurization catalysts and supported MoS₂ catalysts, respectively. Cobalt sulfid e in sulfided CoMo/Al₂O₃ catalyst acted as the promoter for Mo/Al₂O₃ catalyst, whereas nickel sulfide in sulfided NiMo/Al₂O₃ catalyst acted as desulfurization reagent for hydrogen sulfide. Furthermore, acid properties of carriers in supported MoS₂ catalysts was supposed to play an important role for the decomposition of hydrogen sulfide.