Ethane to acetic acid oxidation over supported heteropoly acids

被引：37

作者：

Sopa, A ^{[1
]}

Waclaw-Held, A ^{[1
]}

Grossy, M ^{[1
]}

Pijanka, J ^{[1
]}

Nowinska, K ^{[1
]}

机构：

[1] Adam Mickiewicz Univ Poznan, Fac Chem, Poznan, Poland

来源：

APPLIED CATALYSIS A-GENERAL | 2005年 / 285卷 / 1-2期

关键词：

ethane oxidation; heteropoly acids; FT'-IR spectroscopy; acetic acid production;

D O I：

10.1016/j.apcata.2005.02.013

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：

Molybdo(vanado)phosphoric heteropoly acids of Keggin structure supported on oxide supports (SiO2, TiO2, Al2O3) were used as catalysts for ethane to acetic acid oxidation in the range of reaction temperature from 250 to 400 degrees C. Vanadium atoms introduced into Keggin structure enhanced oxidative activity of catalytic system, while vanadyl groups exchanged into cationic position diminished ethane conversion. Nature of support (acidic or base centres on the surface) influenced both ethane conversion and distribution of products. Ethane oxidation over silica-and titania-supported HPMoVx was due to the presence of regular or defected Keggin structure while low catalytic performance on alumina-supported samples was attributed to mixed Mo-V-P oxides formed as a result of HPMoVx decomposition. Presence of water vapours in the reaction mixture was indispensable both for catalysts surface modification and for acetic acid desorption. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：119 / 125

页数：7

共 39 条

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