应用化学 ›› 2010, Vol. 27 ›› Issue (02): 137-141.DOI: 10.3724/SP.J.1095.2010.90044

• 研究论文 • 上一篇    下一篇

用于苯催化燃烧的Cu-Mn-O/Ce/γ-Al2O3-TiO2催化剂

李吉花1,2,蒋毅1*,王娟芸1,陈君和1,张志强1,2,王奂祎1,2   

  1. (1.中国科学院成都有机化学研究所 成都 610041;2.中国科学院研究生院 北京)
  • 收稿日期:2009-01-13 修回日期:2009-06-16 出版日期:2010-02-10 发布日期:2010-02-10
  • 通讯作者: 蒋毅,男,教授,博士生导师; E-mail:yjiang@cioc.ac.cn; 研究方向:催化化学,环境催化
  • 作者简介:第一作者:李吉花,女,2006级硕士研究生;E-mail:lijihua06@163.com;专业:应用化学通讯作者:蒋毅,男,教授,博士生导师;E-mail:yjiang@cioc.ac.cn; 研究方向:催化化学,环境催化
  • 基金资助:
    国家发改委重大产业化资助项目((2005)1255-12)

Catalytic Combustion of benzene over Cu-Mn-O/Ce/γ-Al2O3-TiO2 Catalysts

LI Ji-Hua1,2, JIANG Yi1*, WANG Juan-Yun1, CHEN Jun-He1, ZHANG Zhi-Qiang1,2, WANG Huan-Yi1,2   

  1. (1.Chengdu Organic Chemical Institute,Chinese Academy of Sciences,Chengdu 610041;
    2.Graduate University of the Chinese Academy of Sciences,Beijing)
  • Received:2009-01-13 Revised:2009-06-16 Published:2010-02-10 Online:2010-02-10
  • Contact: JIANG Yi

摘要:

采用不同的浸渍法制备了负载型催化剂Cu-Mn-O/Ce/γ-Al2O3-TiO2,应用X射线粉末衍射(XRD)、低温液氮吸附(BET)、H2程序升温还原(H2-TPR)和X射线光电子能谱(XPS)等测试技术对催化剂进行了表征。在200~500 ℃考察了催化剂催化燃烧较高浓度的苯(体积分数为3.6%)反应中催化性能。结果表明,15%CuMn2Ox/Al2O3-TiO2(CuMn2Ox的质量分数为15%)在300 ℃苯的转化达到79%,其低温催化活性明显高于单独负载氧化铜或氧化锰的催化剂。而采用共浸渍法制备的催化剂15%CuMn2Ox-15%CeO2/Al2O3-TiO2在300 ℃苯的转化率达到81%,其催化活性明显高于分步浸渍法制备的催化剂。CeO2的添加更利于提高共浸渍法制备的催化剂中各活性组分的分散度和相互作用。

关键词: 铜锰复合氧化物,氧化铈,苯,催化燃烧

Abstract:

The catalytic combustion of (φ=3.6%) benzene during 200~500℃was investigated on supported Cu-Mn-O/Ce/Al2O3 -TiO2catalysts prepared via different wet impregnation methods and characterized by X-ray diffraction (XRD)、N2 adsoption at liqiud-nitrogen temperature (BET)、H2 temperature programmed reduction (H2-TPR) and X-ray photoelectron sprectroscopy (XPS) techniques. The results showed that the 15%CuMn2Ox/Al2O3-TiO2(ω(CuMn2Ox)=15%) achieving 79% conversion of benzene at 300presented higher activity than Cu/Al2O3-TiO2 and Mn/Al2O3-TiO2 catalysts. However, the 15%CuMn2Ox-15%CeO2/Al2O3-TiO2 catalyst obtained by co-impregnation method attaining 81% conversion of benzene at 300℃ showed much higher catalytic activity than the catalyst prepared by two step impregnation. The adding of CeO2 in the co-impregnation method can enhance the dispersion and interaction of compounts.

 

Key words: copper and manganese oxides,ceria,benzene,catalytic combustion

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