Nano-MgO supported CrOX catalysts applied in propane oxidative dehydrogenation: Relationship between active chromium phases and propane reaction pathway

被引：16
作者：
Ma, Fei [1 ]
Chen, Shu [1 ]
Li, Yanhua [1 ]
Zhou, Hang [1 ]
Xu, Aixin [1 ]
Lu, Weimin [1 ]
机构：
[1] Zhejiang Univ, Inst Catalysis, Hangzhou 310028, Zhejiang, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2014年 / 313卷
基金：
中国国家自然科学基金;
关键词：
Nano materials; Oxidative dehydrogenation; Active phase; Propane reaction pathway; OXIDE CATALYSTS; SELECTIVE OXIDATION; POLYMERIZATION; PERFORMANCE; CONVERSION; PROPYLENE; BEHAVIOR; ETHANE; REDOX; IR;
D O I：
10.1016/j.apsusc.2014.06.042
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：
Propane oxidative dehydrogenation was investigated on nano-MgO supported Cr catalysts. Cr-5.0 wt.% sample exhibited the best catalytic performance with a propylene selectivity of 84.1% and propane conversion of 10.8% at 450 degrees C. Cr5O12 and MgCrO4 were proved to be formed, and they could be consecutively reduced as shown by temperature programmed reduction results. The impacts of different Cr phases on propane reaction pathway were also investigated. Fourier transform infrared spectroscopy reflects that Cr5O12 is favorable for the propane dehydrogenation process, while MgCrO4 would activate propane but lead to the COX outcome. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：654 / 659
页数：6
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