Structure-activity relationships in alumina-supported molybdena-vanadia catalysts for propane oxidative dehydrogenation

被引：78

作者：

Bañares, MA ^{[1
]}

Khatib, SJ ^{[1
]}

机构：

[1] CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, Spain

来源：

CATALYSIS TODAY | 2004年 / 96卷 / 04期

关键词：

operando; Raman; vanadia; molybdena; mixed oxides; propane; ODH; structure-activity relationships;

D O I：

10.1016/j.cattod.2004.06.152

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The interactions between Mo and V on alumina are studied for the oxidative dehydrogenation (ODH) of propane. Dispersed surface molybdena and vanadia species share alumina support but show no interaction below Mo + V monolayer coverage. Vanadia and molybdena species react on alumina into mixed Mo-V-(Al)-O above Mo + V monolayer coverage, which nature depends on environmental conditions. Molybdena sites may form Al-2(MoO4)(3) or Mo-V-O phases depending on loading and temperature. The Mo-V-O phases spread on the support as separate surface oxides at lower coverage, such trend appears promoted by ODH reaction conditions. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：251 / 257

页数：7

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