ON THE MECHANISM OF N-BUTANE OXIDATION TO MALEIC-ANHYDRIDE ON VPO CATALYSTS .2. STUDY OF THE EVOLUTION OF THE VPO CATALYSTS UNDER N-BUTANE, BUTADIENE, AND FURAN OXIDATION CONDITIONS

被引：64
|
作者：
ZHANGLIN, Y [1 ]
FORISSIER, M [1 ]
VEDRINE, JC [1 ]
VOLTA, JC [1 ]
机构：
[1] CRES, ELF, CNRS, F-69360 ST SYMPHORIEN DOZON, FRANCE
来源：
JOURNAL OF CATALYSIS | 1994年 / 145卷 / 02期
关键词：
D O I：
10.1006/jcat.1994.1034
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 evolution of the VOPO4 phases and of (VO)2P2O7 and the activated VPO catalyst has been studied by XRD, 31P MAS-NMR, laser Raman spectroscopy, and electron spin resonance after the oxidation of butane, butadiene, and furan. With the exception of δ VOPO4, which partly changes to αII VOPO4, almost no evolution of the bulk structure has been observed. It is concluded that the mechanism of butane oxidation on the VPO catalyst implies principally the participation of a limited number of superficial layers of the structure. Catalytic properties depend on the redox properties of a limited number of V5+ ensembles on the (VO)2P2O7 matrix. A proposal for the mechanism of n-butane oxidation which implies an alkoxide route is presented. © 1994 Academic Press, Inc.
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页码：267 / 275
页数：9
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