Selective CO oxidation in H2-rich gas over K2CO3-promoted Rh/SiO2 catalysts:: effects of preparation method

被引：38

作者：

Ito, S ^{[1
]}

Tanaka, H ^{[1
]}

Minemura, Y ^{[1
]}

Kameoka, S ^{[1
]}

Tomishige, K ^{[1
]}

Kunimori, K ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 2004年 / 273卷 / 1-2期

关键词：

rhodium catalyst; potassium carbonate; selective oxidation; carbon monoxide oxidation; hydrogen;

D O I：

10.1016/j.apcata.2004.06.047

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 selective CO oxidation in H-2-rich gas over K2CO3-promoted Rh/SiO2 (K2CO3-Rh/SiO2) catalysts was investigated, and the results were compared with those of Rh/SiO2 catalysts. K2CO3-Rh/SiO2 catalysts were able to realize almost complete removal of CO. The additive effect of K2CO3 was dependent on the preparation method and on the K2CO3 amounts. K2CO3-Rh/SiO2 catalyst prepared by the sequential impregnation method with molar ratio K/Rh = 3 exhibited high performance. According to the characterization results, the catalyst had highly dispersed Rh metal particles partially covered with K2CO3. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：295 / 302

页数：8

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