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

Journal of the Korean Chemical Society

V P Vislovskiy¹  N T Shamilov¹ 

关键词: Vanadium-antimony oxide catalysts;    Supports;    Oxidative Dehydrogenation;    Isobutane;    Isobutene;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

V0.9Sb0.1Ox systems, bulk and deposited on different supports (five types of ¥ã-aluminas, ¥á-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: ¥ã-Al2O3 > ¥á-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 ¥ã-alumina-supported V0.9Sb0.1Ox systems can be explained by the optimal surface interaction between support and supported components resulting in the formation of well-spread amorphous active VOx-component with vanadium in a high oxidation state.

【 授权许可】

Unknown