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KMID : 1059520110550010081
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Journal of the Korean Chemical Society
2011 Volume.55 No. 1 p.81 ~ p.85
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Effect of Various Supports on the Catalytic Performance of V-Sb Oxides in the Oxidative Dehydrogenation of sobutane
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Shamilov, N.T.
Vislovskiy, V.P.
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Abstract
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V0.9Sb0.1Os systems, bulk and deposited on different supports (five types of δ-aluminas, α-alumina, silica-alumina, silica gel, magnesium oxide), have been tested in the oxidative dehydrogenation (ODH) of iso-butane. Catalytic performance of VSb oxides has shown to be highly dependent on the support and the nature of the support decreasing in a series: δ―Al2O3 > α-Al2O3 > Si-Al-O > SiO2 ∼ MgO ≫ unsupported. Variation of the V-Sb-O-loading in the studied range of coverage (0.5-2 theoretical monolayer) only slightly influences the catalysts’ activity and selectivity. The best catalytic performance of δ-alumina-supported V0.9Sb0.1Os systems can be explained by the optimal surface interaction between support and supported components resulting in the formation of well-spread amorphous active VOs-component with vanadium in a high oxidation state.
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KEYWORD
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Vanadium-antimony oxide catalysts, Supports, Oxidative Dehydrogenation, Isobutane, Isobutene
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