MgO-impregnated Mesoporous Carbon Spheres for Highly Efficient Catalytic Oxidation of H2S at Room Temperature

摘要

Selective catalytic oxidation of H2S to sulfur is one of the best ways for H2S removal, due to its high efficiency and low capital requirement. The key to catalytic oxidation of H2S relies a great degree on highly efficient catalysts. Generally, carbon-based highly efficient catalysts should have properties such as high specific surface area, large pore volume and proper surface chemistry. For practical fixed-bed application, the particle size and geometry of the catalysts are also important with respect to the catalyst effectiveness and pressure drop. Catalysts with spherical shape are very beneficial to handle in fixed bed, due to low fluid resistance and high resistant to abrasion. Herein, we developed a novel high-efficient and practical catalyst based on mesoporous carbon spheres (MCSs) for H2S removal. We found for the first time that the slightly soluble basic oxides MgO performed much better desulfurization performance than conventional soluble slats such as Na2CO3, NaOH, K2CO3 and KOH. Our results will provide a high efficient, practical and low-cost approach for the technological development in H2S removal.