铌对V_2O_5/TiO_2催化剂性能的影响  

Influence of Nb Promoter on the Oxidation of o-Xylene to Phthalic Anhydride over a V_2O 5/TiO_2 Catalyst

作　　者：冯静[1] 张明森[1] 罗国庆[1] 

机构地区：[1]北京化工研究院,北京100013

出　　处：《石油化工》2001年第9期665-668,共4页Petrochemical Technology

摘　　要：考察了含铌的V2 O5/TiO2 催化剂在邻二甲苯催化氧化制苯酐反应中的催化性能 ,并与不含铌的催化剂进行了比较 ,发现铌的加入能够显著降低催化剂的初始反应温度 ,提高催化剂在低温区的活性 ,且在较宽的温度范围内苯酐的选择性较高 ,有利于工业操作 ,用TPD、XRD。A Nb promoter was added to the V 2O 5/TiO 2 catalyst for the oxidation of o-xylene to phthalic anhydride. The influence of the content of Nb on the catalyst activity and phthalic anhydride selectivity was investigated.The acid property was characterized by pyridine-adsorption and temperature-programmed desorption,and redox properties were studied by XPS.

关 键 词：邻二甲苯 苯酐 铌 V2O5/TIO2催化剂 性能 五氧化二钡 二氧化钛 

分 类 号：TQ426.82[化学工程]