期刊
ACS CATALYSIS
卷 1, 期 6, 页码 641-656出版社
AMER CHEMICAL SOC
DOI: 10.1021/cs2001048
关键词
Cu-based catalyst; CO hydrogenation; syngas; ethanol; higher alcohols; fuel
资金
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001058]
- Louisiana Board of Regents
Ethanol and higher alcohols have been identified as potential fuel additives or hydrogen carriers for use in fuel cells. One method of ethanol production is catalytic conversion of syngas (a mixture of CO, H-2, CO2, and H2O), derived from biomass, coal, or natural gas. Thermodynamics of CO hydrogenation shows that ethanol is favored as the sole product at conditions of practical interest, but if methane is allowed as product in this analysis, essentially no ethanol is formed at equilibrium. The kinetics of ethanol formation must therefore be maximized. Although rhodium-based catalysts give C-2(+) oxygenates with high selectivity, their prohibitive cost has spurred research on less expensive copper-based alternatives. Copper based catalysts require an optimum amount of promoter to suppress undesired reactions and maximize the yields of ethanol and higher alcohols. Common promoters include alkali, transition metals and their oxides, and rare earth oxides. Careful selection of operating variables is also necessary to achieve the desired activity and selectivity, This review describes the effects of promoters, supports, and operating conditions on the performance of copper-based catalysts for conversion of dry syngas to ethanol and higher alcohols. Proposed mechanisms from the literature for ethanol and higher alcohol synthesis are outlined.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据