Effect of silica on the selective oxidation of methanol to dimethoxymethane over vanadia-titania catalysts

被引：19

作者：

Sun, Qing ^{[1
]}

Liu, Jingwei ^{[1
]}

Cai, Jingxuan ^{[1
]}

Fu, Yuchuan ^{[1
]}

Shen, Jianyi ^{[1
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem, Nanjing 210093, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2009年 / 11卷 / 01期

基金：

中国国家自然科学基金;

关键词：

V-Ti-O catalysts; SiO2; dopant; Surface acidic and redox properties; Selective oxidation of methanol; Synthesis of dimethoxymethane; TEMPERATURE-PROGRAMMED REDUCTION; SUPPORTED VANADIA; SURFACE-ACIDITY; NITRIC-OXIDE; NO; REACTIVITY; ADSORPTION; V2O5/TIO2; PROBE; TIO2;

D O I：

10.1016/j.catcom.2009.08.010

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：

V-Ti-O oxides with about 4% sulfate were prepared by a co-precipitation method, which showed strong surface acidic and redox properties, and therefore exhibited good performance for the selective oxidation of methanol to dimethoxymethane (DMM) at relatively low reaction temperatures (e.g., 443 K). However, the selectivity to DMM substantially decreased when reaction temperature increased to higher than 453 K. Addition of SiO2 significantly weakened the surface acidity and redox ability of V-Ti-O; and significantly improved the selectivity to DMM above 453 K. Ninety-three percentage selectivity to DMM with 66% conversion of methanol was obtained over a Si-V-Ti-O catalyst at 483 K. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：47 / 50

页数：4

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