The state of Rh during the partial oxidation of methane into synthesis gas

被引：33
|
作者：
Tian, ZJ
Dewaele, O
Marin, GB
机构：
[1] State Univ Ghent, Petrochem Tech Lab, B-9000 Ghent, Belgium
[2] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
来源：
CATALYSIS LETTERS | 1999年 / 57卷 / 1-2期
关键词：
methane partial oxidation; synthesis gas; DRIFTS; supported Rh catalyst;
D O I：
10.1023/A:1019058507319
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：
The partial oxidation of methane to synthesis gas over an alpha-Al2O3- and gamma-Al2O3-supported Rh catalyst has been studied at atmospheric pressure using in situ DRIFTS between 823 and 973 K. A surface intermediate species with IR band at 2000 cm(-1), correlating with the CO formation, was observed during the partial oxidation. DRIFT spectra of adsorbed CO at 323 K were used to study the state of Rh during the partial oxidation. The state of Rh at 973 K is proposed to be a matrix of metallic rhodium with clusters of partially reduced oxide phase with isolated Rh+ atoms dispersed on the support. Rh oxide with Rh+ cations is the state of Rh during partial oxidation of methane at 823 K.
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页码：9 / 17
页数：9
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