Variations of Structure and Active Species in Mesoporous Cr-MSU-x Catalyst during the Dehydrogenation of Ethane with CO2

被引：10

作者：

Liu, L. -Ch. ^{[1
]}

Li, H. -Q. ^{[2
]}

Zhang, Y. ^{[2
]}

机构：

[1] Beijing Univ Technol, Coll Environm & Energy Engn, Dept Chem & Chem Engn, Beijing 100022, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China

来源：

KINETICS AND CATALYSIS | 2009年 / 50卷 / 05期

基金：

美国国家科学基金会;

关键词：

OXIDATIVE DEHYDROGENATION; MOLECULAR-SIEVES; CARBON-DIOXIDE; OXIDE; ETHYLENE; SILICA; PERFORMANCE;

D O I：

10.1134/S0023158409050103

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 dehydrogenation of ethane to ethylene under CO2 over mesoporous Cr-MSU catalyst was investigated with respect to the time on-stream behavior. When ethane was allowed to react for about 240 min, the meso-structure of catalyst remained nearly unchanged in spite of some decrease of surface area. The Cr(VI) species in tetrahedral coordination in fresh Cr-MSU were reduced to Cr(III) species in octahedral coordination, that was expected to cause the activity decrease of catalyst, together with the structure change. Cr(VI) is more active than Cr(III) for ethane dehydrogenation with CO2, but Cr(III) represent fairly stable active centers for the reaction.

引用

页码：684 / 690

页数：7

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