能源化学(英文版)

能源化学(英文) ›› 2003, Vol. 12 ›› Issue (1): 31-36.

• Articles • 上一篇    下一篇

A Novel Sul ded Mo/C Catalyst for Direct Vapor Phase　Carbonylation of Methanol at Atmospheric Pressure

Feng Peng   

  1. Department of Chemical Engineering, South China University of Technology, GuangZhou 510640, China
  • 出版日期:2003-03-30 发布日期:2003-03-30

A Novel Sul ded Mo/C Catalyst for Direct Vapor Phase　Carbonylation of Methanol at Atmospheric Pressure

Feng Peng   

  • Online:2003-03-30 Published:2003-03-30

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摘要： The direct carbonylation of methanol, without any halide in the feed as a promoter, is presented. A series of Mo catalysts supported on activated carbon, r-Al2O3 and SiO2 were prepared. The results show that the support greatly a ects the Mo catalyst in the direct vapor-phase carbonylation of methanol, and activated carbon is the best supports of the investigated supports. In addition, the relationships between adsorptions of NH3 and CO and carbonylation of methanol were investigated. A novel sulfided Mo/C catalyst had high activity and selectivity for the vapor phase carbonylation of methanol to methyl acetate without the addition of a CH3I promoter to the feed. The reaction conditions were optimized at a reaction temperature of 573 K, a methanol concentration of 23 mol% and a carbon monoxide space velocity of 3,000 L/(kgh). Under these optimal conditions a methanol conversion of 50%, carbonylation selectivity of 80 mol%, and space-time yield of 8.0 mol/(kgh) were obtained. The active phase of this novel sul ded Mo/C catalyst is the non-crystalline phase, and the active component is present as MoS2.5 on the surface of the activated carbon.

关键词: methanol, carbonylation, sulded catalyst, molybdenum, catalyst support, activated carbon,

Abstract: The direct carbonylation of methanol, without any halide in the feed as a promoter, is presented. A series of Mo catalysts supported on activated carbon, r-Al2O3 and SiO2 were prepared. The results show that the support greatly a ects the Mo catalyst in the direct vapor-phase carbonylation of methanol, and activated carbon is the best supports of the investigated supports. In addition, the relationships between adsorptions of NH3 and CO and carbonylation of methanol were investigated. A novel sulfided Mo/C catalyst had high activity and selectivity for the vapor phase carbonylation of methanol to methyl acetate without the addition of a CH3I promoter to the feed. The reaction conditions were optimized at a reaction temperature of 573 K, a methanol concentration of 23 mol% and a carbon monoxide space velocity of 3,000 L/(kgh). Under these optimal conditions a methanol conversion of 50%, carbonylation selectivity of 80 mol%, and space-time yield of 8.0 mol/(kgh) were obtained. The active phase of this novel sul ded Mo/C catalyst is the non-crystalline phase, and the active component is present as MoS2.5 on the surface of the activated carbon.

Key words: methanol, carbonylation, sulded catalyst, molybdenum, catalyst support, activated carbon,