Kinetics and mechanism of the oxidative dehydrogenation of ethane over Li/Dy/Mg/O/(Cl) mixed oxide catalysts

被引：30

作者：

Gaab, Stefan ^{[1
]}

Find, Josef ^{[1
]}

Mueller, Thomas E. ^{[1
]}

Lercher, Johannes A. ^{[1
]}

机构：

[1] Tech Univ Munich, Dept Chem, Lehrstuhl Tech Chem 2, D-85747 Garching, Germany

来源：

TOPICS IN CATALYSIS | 2007年 / 46卷 / 1-2期

关键词：

oxidative dehydrogenation; ethane; ethene; mixed oxide;

D O I：

10.1007/s11244-007-0320-x

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The microkinetic reaction network of the oxidative dehydrogenation of ethane to ethene over Li/Dy/Mg/O and Li/Dy/Mg/O/Cl catalysts was investigated. With Li/Dy/Mg/O catalysts, the reaction kinetics is compatible with a heterogeneous-homogeneous radical based reaction mechanism. The formation of ethyl radicals on the surface is concluded to be the rate-determining step. In contrast, the reaction kinetics for Li/Dy/Mg/O/Cl is in line with a purely surface catalyzed reaction mechanism. However, also in this case, alkane activation is rate determining.

引用

页码：101 / 110

页数：10

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