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Effect of Various Supports on the Catalytic Performance of V-Sb Oxides in the Oxidative Dehydrogenation of sobutane

N. T. Shamilov|V. P. Vislovskiy
대한화학회|2011.02|대한화학회지 (Journal of the Korean Chemical Society)|제55권 제1호|pp. 81-85

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키워드

이소부탄Vanadium-antimony oxide catalystsSupportsOxidative DehydrogenationIsobutaneIsobutene바나듐-안티몬 산화물 촉매담지체산화탈수소반응이소부텐
주제분류화학

초록

V_(0.9)Sb_(0.1)O_x systems, bulk and deposited on different supports (five types of γ-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: γ-Al_2O_3 > α-Al_2O_3> Si-Al-O > SiO_2 ≈ 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 γ-alumina-supported V_(0.9)Sb_(0.1)O_x systems can be explained by the optimal surface interaction between support and supported components resulting in the formation of well-spread amorphous active VO_x-component with vanadium in a high oxidation state.

Abstract

V_(0.9)Sb_(0.1)O_x systems, bulk and deposited on different supports (five types of γ-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: γ-Al_2O_3 > α-Al_2O_3> Si-Al-O > SiO_2 ≈ 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 γ-alumina-supported V_(0.9)Sb_(0.1)O_x systems can be explained by the optimal surface interaction between support and supported components resulting in the formation of well-spread amorphous active VO_x-component with vanadium in a high oxidation state.

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관련 논문AI추천

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