丙烷在负载型V2O5/Zr3(PO4)4催化剂上的氧化脱氢

制备了无定型的磷酸锆Ｚｒ３（ＰＯ４）４载体，采用浸渍法在载体上负载０６％～６０％的Ｖ２Ｏ５．所制备的催化剂在丙烷氧化脱氢反应中具有较好的催化性能，如３０％Ｖ２Ｏ５／Ｚｒ３（ＰＯ４）４催化剂在丙烷转化率为１７０％时，丙烯选择性可达５３８％，丙烯收率达９１％．考察了不同反应条件下催化剂的性能．ＸＲＤ、ＩＲ和Ｒａｍａｎ光谱表明，Ｖ２Ｏ５在Ｚｒ３（ＰＯ４）４载体上主要是以高度分散的钒氧物种存在；ＥＳＲ分析结果证明催化剂中存在Ｖ４＋物种，表明Ｖ５＋／Ｖ４＋参与了氧化还原反应．

Oxidative Dehydrogenation of Propane on Supported V 2O 5/Zr 3(PO 4) 4 Catalysts

V 2O 5 were supported on the amorphous Zr 3(PO 4) 4 by a impregnation method. The supported catalysts were effective in the oxidative dehydrogenation of propane, e.g. on a 3 0%V 2O 5/Zr 3(PO 4) 4 catalyst propene had selectivity of 53 8% at a propane conversion of 17 0% and the yield of propene was 9 1%. XRD, IR and Raman results showed that the vanadium oxide was distributed on the support in form of VO x species. ESR results indicated there are V 4 species in the catalysts, implying that the oxidation couple of V 5 /V 4 could be responsible for the redox reaction in propane oxidative dehydrogenation.