Selective oxidation of light alkanes on transition metal promoted vanadyl pyrophosphate (VPO) catalysts

被引：0
作者：
Haber, J. [1 ]
Stoch, J. [1 ]
Zazhigalov, V. A. [2 ]
Bacherikova, I. V. [2 ]
Cheburakova, E. V. [2 ]
机构：
[1] Polish Acad Sci, Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland
[2] Natl Acad Sci Ukraine, Inst Sorpt & Problems Endoecol, UA-03164 Kiev 164, Ukraine
来源：
POLISH JOURNAL OF CHEMISTRY | 2008年 / 82卷 / 09期
关键词：
vanadyl diphosphate; oxidation of propane; n-butane; n-pentane;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Vanadyl diphosphate ( vanadyl pyrophosphate) promoted with Bi, Cs, Co and Te was studied as catalyst in the oxidation of propane, n-butane and n-pentane. The additives modified the surface P/V ratio as determined by XPS, and Bronsted and Lewis acidity, determined by TPD of ammonia and transformation of 2-methyl-3-butyn-2-ol. The specific rate of the oxidation of hydrocarbons correlated with the nucleophilicity of surface oxygen ions. With increase of Lewis acidity the selectivity to maleic anhydride in oxidation of n-butane increased, whereas in oxidation of n-pentane the selectivity to phthalic anhydride increased and that to maleic anhydride decreased. The mechanism is discussed.
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页码：1839 / 1852
页数：14
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