共沉淀型Cu-ZnO/Al_2O_3甘油加氢催化剂结构变化研究  

A Study on Phase Transformation During the Preparation of a Co-Precipitated Cu-ZnO/Al_2O_3 Glycerol Hydrogenation Catalyst

作　　者：李廷真[1] 付川[1] 祁俊生[1] 赖庆轲[1] 

机构地区：[1]重庆三峡学院化学与环境工程学院,重庆万州404100

出　　处：《重庆三峡学院学报》2013年第3期92-94,共3页Journal of Chongqing Three Gorges University

基　　金：重庆市教委自然科学基金项目(KJ08112);重庆三峡学院人才引进科研项目(2007-SXXYRC-010)

摘　　要：利用N2物理吸附、XRD和空气热重对Cu-ZnO/Al2O3甘油加氢催化剂在制备过程中物相结构的变化进行了系统的研究.研究结果表明,干燥后催化剂主要由Cu2Zn4Al2(OH)16CO3 4H2O和Cu2(OH)2CO3物相组成,经过600℃焙烧4 h后,催化剂在沉淀过程中生成的Cu2Zn4Al2(OH)16CO3 4H2O和Cu2(OH)2CO3全部分解为CuO.在500℃催化剂具有最大的比表面积(79 m2/g)和孔容(0.36 cm3/g).A systematic study was undertaken to investigate the effects of the calcination temperature on the textural properties, phase compositions of a co-precipitated Cu-ZnO/Al2O3 glycerol hydrogenation catalyst. The catalyst samples were characterized by N2 physisorption, X-ray diffraction （XRD）, and air thermal gravimetric analysis （air-TGA）. The characterization results indicated that the calciantion temperature has a significant effect on the catalyst textural properties and phase compositions. After dryness, the catalyst sample is mainly composed of Cu2（OH）2CO3 and Cu2Zn4Al2（OH）16CO3·4H2O. However, after the calcination at 600℃, the phases of Cu2（OH）2CO3 and Cu2Zn4Al2（OH）16CO3·4H2O formed during the precipitation are all transformed to CuO. The catalyst calcined at 500 ℃ has the highest BET surface area （79 m^2/g） and pore volume （0.36 cm^3/g）.

关 键 词：甘油 脱氢 共沉淀 物相组成 

分 类 号：O643.3[理学—物理化学]