Direct synthesis of methanethiol from H₂S-rich syngas over sulfided Mo-based catalysts

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• 作者：Aiping Chen ; Qi Wang ; Qiaoling Li ; Yingjuan Hao ; Weiping Fang ; Yiquan Yang
• 关键词：Methanethiol synthesis ; Hydrogen sulfide ; Syngas ; Mo-based catalysts ; Potassium ; Cobalt ; Hydrogenation
• 刊名：Journal of Molecular Catalysis A ; Chemical
• 出版年：2008
• 期刊代码：57_13811169
• 类别：ch
• 出版时间：18 March 2008
• 卷：283
• 期：1-2
• 页码：69-76
• 文件大小：500 K

摘要

The direct synthesis of methanethiol from H₂S-rich syngas was investigated over sulfided Mo-based catalysts supported on SiO₂. K-promoted Mo/SiO₂ catalysts exhibited a high activity for the synthesis of CH₃SH. The incorporation of cobalt into the K–Mo/SiO₂ catalyst increased the catalytic activity, but slightly decreased the selectivity to methanethiol. The selected catalysts were characterized by using X-ray diffraction (XRD), CO temperature-programmed desorption (CO-TPD), electron spin resonance (ESR), and X-ray photoelectron spectroscopy (XPS) techniques. The results showed that the potassium interacts with Mo component and increases the active sites for the CH₃SH synthesis by changing the concentration of Mo⁵⁺ species after sulfidation. A mechanism for the synthesis of CH₃SH was proposed.