Effect of metal oxide additives on the CO hydrogenation to methanol over Rh/SiO2 and Pd/SiO2

被引：28
|
作者：
Gotti, A
Prins, R
机构：
[1] Laboratory for Technical Chemistry, Swiss Fed. Institute of Technology
来源：
CATALYSIS LETTERS | 1996年 / 37卷 / 3-4期
关键词：
methanol synthesis; Rh catalysts; Pd catalysts; impurity-free SiO2 support; metal oxide additives; formate intermediate;
D O I：
10.1007/BF00807745
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：
Catalysts were prepared from ultra pure SiO2, Pd and Rh nitrates and chlorides, and by doping with Al, Fe, Na, K or Ca nitrate. The activities and selectivities of the Pd and Rh catalysts were investigated at 553 K, H-2/CO = 2 or 3 and 2.5 or 4 MPa respectively. Additives had a strong influence on the catalytic properties. The doping with alkali and alkaline earth oxides led to a strong suppression of the CO dissociation. Particularly basic additives, such as Ca, had a strong promoting effect on the methanol production. This may confirm that the formation of methanol occurs through formate intermediates.
引用
收藏
页码：143 / 151
页数：9
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