Reaction pathways and kinetics of the gas-phase oxidation of cyclohexane on NiO/γ-Al2O3 catalyst

被引：24
|
作者：
Patcas, F. [1 ]
Patcas, F. C.
机构：
[1] Forschungszentrum Karlsruhe, Inst Tech Chem, Div Chem Phys Proc, D-76021 Karlsruhe, Germany
[2] Univ Karlsruhe, Inst Chem Proc Engn, D-76128 Karlsruhe, Germany
来源：
CATALYSIS TODAY | 2006年 / 117卷 / 1-3期
关键词：
cyclohexane oxidation; oxidehydrogenation; cyclohexene; NiO/gamma-Al2O3; catalyst; oxidation mechanism;
D O I：
10.1016/j.cattod.2006.05.052
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A NiO/gamma-Al2O3 catalyst with a nearly monolayer dispersion of active nickel oxide species on the carrier was synthesized and investigated for the selective oxidehydrogenation of cyclohexane to cyclohexene. Integral measurements were performed to determine the reaction network and products distribution and differential measurements for kinetic investigations. The kinetic study showed a mechanism change in the temperature range of 573-603 K. From 513 to 573 K the oxidation took place via electrophilic oxygen species and from 603 to 723 K with nucleophilic oxygen species. The reaction order of cyclohexane is 1.0 in the lower temperature range and 0.5 in the higher one. (C) 2006 Elsevier B.V. All rights reserved.
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页码：253 / 258
页数：6
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