In-situ synthesis and characterization of V-MCM-41 for oxidative dehydrogenation of n-butane

被引：36

作者：

Wang, Xiaosheng ^{[1
]}

Zhou, Guanglin ^{[1
]}

Chen, Zhiwei ^{[1
]}

Jiang, Weili ^{[1
]}

Zhou, Hongjun ^{[1
]}

机构：

[1] China Univ Petr, Inst New Energy, State Key Lab Heavy Oil Proc, Beijing, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2016年 / 223卷

关键词：

In-situ synthesis; V-MCM-41; n-Butane; Oxidative dehydrogenation; CATALYTIC PERFORMANCE; MESOPOROUS SILICATES; MCM-41; PROPANE; BEHAVIOR; VANADIA; METHANE; TEMPERATURE; CR;

D O I：

10.1016/j.micromeso.2015.06.029

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of MCM-41 catalysts with different vanadium content were prepared via prehydrolysis hydro thermal method with ammonia metavanadate as precursors. The prepared samples were characterized by Powder X-ray diffraction (XRD), N-2 adsorption-desorption, X-ray photoelectron spectra (XPS), H-2 temperature-programmed reduction (TPR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results showed that V-MCM-41 could still maintain hexagonal mesoporous structure and large specific surface area when the vanadium content was low, whereas the mesoporous structure collapsed in the high V-containing samples. Two vanadium species (V5+/VSiOx and V5+/V2O5) were identified in the catalysts and the highly dispersed vanadium species decreased with the increasing vanadium content. The activity of the catalysts were tested for the oxidative dehydrogenation (ODH) of n-butane with O-2 as oxidant, the results showed that V5+/VSiOx was more active than V5+/V2O5. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：261 / 267

页数：7

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