Reduction of Sulfur Dioxide by Methane to Elemental Sulfur over Supported Cobalt Catalysts

作者：Jing‐Jiang Yu, Qiquan Yu, Yun Jin, Shih-Ger Chang · 发表于：Industrial & Engineering Chemistry Research · 年份：1997 · DOI：10.1021/ie950575i · 被引用次数：36 · 研究领域：Catalysis and Hydrodesulfurization Studies、Catalysts for Methane Reforming、Industrial Gas Emission Control

Cobalt oxides supported on several types of carriers (silica, molecular sieves 5A and 13X, and γ-Al 2 O 3 ) were evaluated for the reduction of sulfur dioxide by methane to elemental sulfur. Results showed that γ-Al 2 O 3 is the most effective carrier and that, with a molar ratio of 2 to 1 of sulfur dioxide to methane in a feed gas, the sulfur yield reached a maximum value of 87.5% at a space velocity of 5000 h - 1 and a temperature of 840 °C. X-ray diffraction results revealed that mixtures of cobalt oxide and cobalt sulfide components were observed. The effects of temperature, space velocity, and molar ratio of sulfur dioxide to methane in the feed on the activity of the cobalt catalyst supported on γ-Al 2 O 3 were investigated. The effect of feed gas containing a hydrogen sulfide contaminant was also studied. A catalyst size-dependence study was performed to determine the influence of the internal diffusion.