Investigations on the oxidative dehydrogenation of n-butane over VMgO-type catalysts

被引:49
作者
Lemonidou, AA
Tjatjopoulos, GJ
Vasalos, IA
机构
[1] Aristotelian Univ Salonika, Dept Chem Engn, GR-54006 Salonika, Greece
[2] Chem Proc Engn Res Inst, GR-54006 Salonika, Greece
关键词
oxidative dehydrogenation; n-butane; vanadium-magnesium oxide catalysts;
D O I
10.1016/S0920-5861(98)00250-8
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The oxidative dehydrogenation of n-butane was investigated over VMgO mixed oxide and pure magnesium ortho- and pyrovanadate catalysts. The formulation containing 30 wt% V2O5 and consisting of the Mg-3(VO4)(2) and MgO crystal phases is more selective than the pure Mg-3(VO4)(2), while the Mg2V2O7 phase is the least selective. The selectivity to butanes and butadiene increases with the reaction temperature and the feed molar ratio of butane/oxygen. Addition of water tends to decrease the conversion of butane and enhances the oxydehydrogenation product selectivity. The relative importance of the primary and secondary paths of the reaction network was analyzed by the method of addition of intermediate products. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:65 / 71
页数:7
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