Zr、Mo、Zn添加剂及机械球磨对钒-磷-氧催化剂性质的影响  

EFFECTS OF Zr, Mo AND Zn ADDITIVES AND PHYSICAL MILLING ON THE PROPERTIES OF VPO CATALYSTS

作　　者：王晓书[1] 季伟捷[2] 许利军[2] 颜其洁[2] 陈懿[2] 

机构地区：[1]南京大学现代分析中心,江苏南京210093 [2]南京大学化学化工学院,江苏南京210093

出　　处：《燃料化学学报》2001年第2期144-148,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金"九五"重大项目! (2 9792 0 73 1);中国石化集团公司联合资助项目! (1997 2 0 0 0 )&&

摘　　要：利用X射线衍射 (XRD)、X射线光电子能谱 (XPS)及傅利叶红外光谱 (FT IR)等手段考察了添加剂Zr、Mo、Zn和机械球磨对VPO催化剂结构与性质的影响 ,采用正丁烷选择氧化反应评价催化剂的催化性能。实验表明 ,添加Mo ,Zn会减少 (2 0 0 )面的相对暴露 ,但是可以增大表面 +4价钒的相对比例 ,因此反应活性提高。助剂Zr可能会取代表面 +4价的钒 ,明显增大催化剂的表面P/V比 ,因此没有明显的助催化作用。机械球磨可以明显增大VPO催化剂活性组分 (VO) 2 P2 O7晶相 (2 0 0 )面的相对暴露 ,导致催化剂的反应活性上升。Effect of Zr, Mo and Zn additives and physical milling on the properties of VPO catalysts have been investigated by means of XRD, XPS and FT-IR Addition of Mo and Zn decreased the relative exposure of (200) plane, however, the relative concentration of the surface V 4+ increased, therefore, the catalytic performance was increased Addition of Zr appeared to increase the surface P/V ratios of the catalysts, and the element V on the surface was substituted by Zr, so that Zr component showed insignificant promoting effect Physical milling process increased the relative exposure of (200) plane, and the catalytic performance was enhanced

关 键 词：机械球磨 添加剂 XPS XRD 钒磷氧催化剂 选择性氧化 催化活性 碳4烃 顺丁二烯二酸酐 铬 钼 锌 

分 类 号：TQ225.23[化学工程—有机化工] O643.36[理学—物理化学]