Continuous Low-Temperature Methanol Synthesis from Syngas Using Alcohol Promoters

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• 作者：Prasert Reubroycharoen ; Tetsuji Yamagami ; Tharapong Vitidsant ; Yoshiharu Yoneyama ; Motoaki Ito ; and Noritatsu Tsubaki
• 刊名：Energy & Fuels
• 出版年：2003
• 出版时间：July 2003
• 年：2003
• 卷：17
• 期：4
• 页码：817 - 821
• 全文大小：76K
• 年卷期：v.17,no.4(July 2003)
• ISSN：1520-5029

文摘

Continuous low-temperature methanol synthesis from syngas containing CO₂ on various Cu/ZnOcatalysts was investigated by using a semibatch autoclave reactor. Methanol was easily producedat a temperature as low as 443 K and with a pressure of 50 bar with the aid of 2-butanol, whichshowed a very high efficiency with a one-pass yield of 47.0% and a selectivity of 98.9%. Methanolitself used as alcohol promoter exhibited a higher activity than other 1-alcohols because it hasthe lowest spatial effect. 2-Alcohols, however, exhibited the highest conversion among the samecarbon number because of its well-balanced effects produced by their of electronic and spatialfactors. The one-pass conversion was improved by increasing the catalyst weight because nothermodynamic limitations existed at low temperatures. The continuous low-temperature methanol synthesis is a very promising process because completely purified syngas is not necessary.