CO2 and H2S are acid gases are present in significant concentrations in natural gas streams and need to be separated using energy intensive amine absorption methods. Captured CO2 is emitted into the atmosphere acting as a major greenhouse gas while H2S is combusted to yield elemental sulfur and water. In this work we focus on catalytic transformation of CO2 and H2S under reducing environments on MoS2 catalyst to form a reactive CO intermediate that can be further converted to value-added hydrocarbons (alkanes, olefins and aromatics) thus performing solventless separation and utilization of CO2. We performed extensive kinetic studies using fixed bed reactor in combination with ab initio calculations to measure and derive the corresponding mechanisms under which H2S acts as an inhibitor, coreactant or a promoter during CO2 hydrogenation. The data presented describe kinetic aspects of the catalyst for CO2 utilization in the presence of sulfur containing acid gases.

Role of H2S on CO2 hydrogenation on MoS2: Kinetic study

2019 Fall National Meeting

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