Molybdenum and tungsten dioxides, XO2 (X = Mo, W), as reforming catalysts for hydrocarbon compounds

被引:44
作者
Katrib, A [1 ]
Mey, D [1 ]
Maire, G [1 ]
机构
[1] ULP, ECPM, CNRS, UMR 7515,LERCSI, F-67000 Strasbourg, France
关键词
tungsten dioxide; molybdenum dioxide; reforming catalysts; bifunctional mechanism; isomerization of hydrocarbons;
D O I
10.1016/S0920-5861(00)00580-0
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The reforming catalytic properties of tungsten and molybdenum dioxides have been interpreted in terms of a bifunctional mechanism. A stable XO2 (X = W, Mo) has been obtained following the reduction of XO3 by hydrogen for 4h at 400 degreesC for Mo and 460 degreesC for W. A relatively high selectivity lip to 100% in isomerization products for the hexanes were obtained at reaction temperatures of 280 degreesC in the case of MoO2 and at 300 degreesC for WO2. Titanium dioxide, TiO2, was chosen as the appropriate support on the basis of its electronic structure which enables to avoid a strong metal-support interaction with the active XO2 phase. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:179 / 183
页数:5
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