HYDROGENATION OF CO2 OVER GOLD SUPPORTED ON METAL-OXIDES

被引：151
作者：
SAKURAI, H
TSUBOTA, S
HARUTA, M
机构：
[1] Government Industrial Research Institute of Osaka, Ikeda, 563
来源：
APPLIED CATALYSIS A-GENERAL | 1993年 / 102卷 / 02期
关键词：
CO2; HYDROGENATION; METHANOL SYNTHESIS; SUPPORT EFFECT; SUPPORTED GOLD CATALYSTS;
D O I：
10.1016/0926-860X(93)80224-E
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Gold highly dispersed on a variety of metal oxides were prepared by coprecipitation and deposition-precipitation methods. The hydrogenation of CO2 on supported gold catalysts was investigated at temperatures between 150 and 400-degrees-C and a pressure of 8 atm. The methanol yields reached a maximum at temperatures between 200 and 300-degrees-C, depending on the support oxides. The highest yield and selectivity towards methanol was obtained on Au/ZnO at 250-degrees-C. At 200-degrees-C Au/Fe2O3 was the most active for methanol synthesis, exhibiting activity almost comparable to that of the conventional Cu/ZnO catalyst with the same metal content. Gold supported on TiO2 was so active in reducing CO2 to CO that the conversion was close to equilibrium. Over Au/ZnO as well as over Cu/ZnO, CO2 could be hydrogenated to methanol at lower temperatures than CO.
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页码：125 / 136
页数：12
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