CARBON-DIOXIDE HYDROGENATION ON RHODIUM SUPPORTED ON TRANSITION-METAL OXIDES - EFFECT OF REDUCTION TEMPERATURE ON PRODUCT DISTRIBUTION

被引：48

作者：

TROVARELLI, A ^{[1
]}

MUSTAZZA, C ^{[1
]}

DOLCETTI, G ^{[1
]}

KASPAR, J ^{[1
]}

GRAZIANI, M ^{[1
]}

机构：

[1] UNIV TRIESTE, DIPARTIMENTO SCI CHIM, I-34127 TRIESTE, ITALY

来源：

APPLIED CATALYSIS | 1990年 / 65卷 / 01期

关键词：

adsorption; carbon dioxide hydrogenation; rhodium/niobia; rhodium/titania;

D O I：

10.1016/S0166-9834(00)81593-6

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：

Carbon dioxide hydrogenation has been performed on Rh/TiO2 and Rh/Nb2O5 catalysts and the effects of metal reduction conditions have been investigated. C1-C6 hydrocarbons have been detected and shown to follow Anderson-Schulz-Flory (ASF) statistics. In the case of Rh/TiO2 the role of carbon monoxide as an intermediate in carbon dioxide hydrogenation has been clearly evidenced. In both catalysts the formation of the SMSI state (strong metal-support interactions) during high-temperature reduction strongly influenced catalytic activities and selectivities. On Rh/Nb2O5 the SMSI state was found to be labile in catalytic conditions whereas on Rh/TiO2 it was maintained because of the presence of hydrogen which slowed down the oxidation process operated by water. © 1990.

引用

页码：129 / 142

页数：14

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