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

页码：143 / 151

页数：9

共 52 条

[1] SELECTIVE SYNTHESIS OF ETHANOL OVER RH-TI-FE-IR/SIO2 CATALYST AT HIGH-PRESSURE SYNGAS CONVERSION [J].