Highly efficient V-Sb-O/SiO₂ catalyst with Sb atom-isolated VOx species for oxidative dehydrogenation of propane to propene

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• 作者：Haidong Zhang ; Shujie Cao ; Yu Zou ; Yi-Meng Wang ; Xiaojing Zhou ; Yu Shen ; Xuxu Zheng
• 关键词：Propane ; Oxidative dehydrogenation ; V&ndash ; Sb mixed oxide ; Sb atom-isolated VOx species
• 刊名：Catalysis Communications
• 出版年：5 February, 2014
• 年：2014
• 卷：45
• 期：Complete
• 页码：158-161
• 全文大小：434 K

文摘

Silica supported vanadium-antimony mixed oxide catalyst (V-Sb-O/SiO₂) with the OSbOVOSb framework was prepared by a two-step impregnation method, in which SbCl₅ and NH₄VO₃ were introduced successively to generate monomeric VOx species isolated by Sb atoms. In the ODH of propane with O₂ as oxidant, the V-Sb-O/SiO₂ catalyst leads to high activity and high propene selectivity but depressed production of COx. At 600 掳C, a 65.6% C₃H₆ selectivity with a 40.1% C₃H₈ conversion was obtained and then, a propene yield up to 26.3% was achieved on V-Sb-O/SiO₂ catalyst. This yield is comparable to that for V-Mg-O catalysts, SBA-15/MCM-41supported vanadia catalysts and vanadium-containing mesoporous silica materials.