高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (4): 620.

• 研究论文 • 上一篇    下一篇

高比表面积VPO催化剂的制备及其性质研究

王晓书1,2, 聂维艳2, 季伟捷2, 颜其洁2, 陈懿2   

  1. 1. 南京大学现代分析中心;
    2. 南京大学化学化工学院, 南京 210093
  • 收稿日期:2001-03-28 出版日期:2002-04-24 发布日期:2002-04-24
  • 通讯作者: 季伟捷(1964年出生),男,博士,副教授,从事多相催化研究.E-mail:jwjabcde@public1.ptt.js.cn E-mail:jwjabcde@public1.ptt.js.cn
  • 基金资助:

    "973"国家重点基础研究发展规划项目(批准号:2000048009)资助.

The Preparation and Characterization of High SpecificSurface Area VPO Catalysts

WANG Xiao-Shu1,2, NIE Wei-Yan2, JI Wei-Jie2, YAN Qi-Jie2, CHEN Yi2   

  1. 1. Center for Modern Analysis, Nanjing University, Nanjing 210093, China;
    2. School of Chemistry and Chemical Engineering, Nanjing Unicersity, Nanjing 210093, China
  • Received:2001-03-28 Online:2002-04-24 Published:2002-04-24

PDF (PC)

被引次数

27

摘要： 利用有机相制备VPO催化剂,在制备过程中加入聚乙二醇(PEG)作为分散剂可有效提高VPO催化剂的比表面积。实验中采用两种不同分子量的聚乙二醇(PEG 6000和PEG 10000),所得VPO催化剂的比表面积分别为52与54m2/g,而不加聚乙二醇的VPO催化剂其比表面积仅为19m2/g.XRD,XPS及FTIR的结果表明,催化剂的主要晶相均为(VO)2P2O7,但两类催化剂的微观结构有所不同。正丁烷选择氧化生成马来酐的催化反应结果表明,385℃时加聚乙二醇制备的VPO催化剂其丁烷的转化率为84%～86%.马来酸酐的选择性为78%,而不加聚乙二醇制备的VPO催化剂其转化率和选择性均为71%.

关键词: VPO催化剂, 聚乙二醇, 高比表面积, 制备化学

Abstract: The high specific surface area VPOcata1yst systems were first developed by using polyethyleneglycol(PEG) as the dispersant in the organic media.Two PEGs with different molecular weights, namely,PEG 6000 and PEG 10000, were applied to this study, and the resulted VPOcatalyst had their specificsurface areas of 52 and 54 m2/g, respectively.For the VPOsample prepared without using PEG, it onlyhad a specific surface area of 19 m2/g.For partial oxidation of n-butane to maleic anhydride, it was foundthat the conversion of n-butane and the selectivity to maleic anhydride over the catalysts prepared in thepresence of PEGwere 84%-87% and 78%, respectively; while over the compared sample they are only 71% and 71%, respectively.The significant higher specific surface area of the PEG-synthesized samplemay in part account for the enhancement in catalytic activity.

Key words: VPO catalysts, Polyethylene glycol, High specific surface area, Preparation chemistry

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