The effect of metal order on the oxidation of a hydrocarbon mixture over alumina-supported combined platinum/rhodium catalysts

被引：6
|
作者：
Patterson, MJ [1 ]
Angove, DE [1 ]
Cant, NW [1 ]
机构：
[1] Macquarie Univ, Dept Chem, Macquarie, NSW 2109, Australia
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2001年 / 35卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
platinum; rhodium; hexene; benzene; toluene isooctane; carbon monoxide;
D O I：
10.1016/S0926-3373(01)00232-6
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：
The oxidation of a mixture of benzene, toluene, 1-hexene and isooctane in the absence and presence of carbon monoxide has been studied over Pt/Al2O3 and Rh/Al2O3 monolith catalysts arranged singly and in various 1:1 and 4:1 combinations. Physical mixtures with both ratios are much more active than either single metal catalyst for complete removal of hydrocarbons when CO is present. The origin of the improvement is the high activity of Rh for oxidation of CO and hexene which allows the Pt to oxidise isooctane and benzene free of inhibition. Sequential beds in the order Rh then Pt are marginally more active than the corresponding mixed beds, but the order Pt then Rh is highly detrimental since the beneficial effect of prior or concurrent oxidation of CO over the Rh is lost. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：53 / 58
页数：6
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