Strong inhibition effect of sulfur impurities in alumina supports on the catalytic activity of Rh in the CH4-CO2 reforming reaction

被引：15
作者：
Yokota, Shigeru
Okumura, Kazu
Niwa, Miki
机构：
[1] Tottori Univ, Fac Engn, Dept Mat Sci, Tottori 6808552, Japan
[2] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan
来源：
APPLIED CATALYSIS A-GENERAL | 2006年 / 310卷 / 1-2期
关键词：
dry reforming reaction; rhodium; sulfur; alumina; EXAFS;
D O I：
10.1016/j.apcata.2006.05.021
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 influence of the sulfur impurity on the CH4-CO2 reforming reaction over Rh catalyst was studied. The activity of Rh/Al2O3 varied remarkably depending on the kinds of Al2O3 Support. Based on the EXAFS and TPR measurements, the variations were ascribed to the changes in the reducibility of Rh as a result of the interaction with SO42- present as impurity in the alumina support. In agreement with the assumption, the activity of Rh improved significantly as SO42- was removed from the Al2O3 support. Based on the EXAFS analysis, the role of SO42- anion was ascribed to the inhibition of the reduction of RhCl3 to give metal Rh. (C) 2006 Elsevier B.V. All rights reserved.
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页码：122 / 126
页数：5
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