应用化学 ›› 1996, Vol. 0 ›› Issue (4): 89-91.

• 研究简报 • 上一篇    下一篇

Cr-Ag/γ-Al2O3催化剂在CO氧化反应中Ag的助催化作用

陈平1, 朱波1, 钟依均1, 罗孟飞1, 李少华1, 吴红丽2   

  1. 1. 杭州大学催化研究所 杭州 310028;
    2. 杭州大学中心实验室 杭州
  • 收稿日期:1995-10-30 修回日期:1996-04-01 出版日期:1996-08-10 发布日期:1996-08-10

Promoter Action of Ag on Cr-Ag/γ-Al2O3 Catalyst for CO Oxidation

Chen Ping1, Zhu Bo1, Zhong Yijun1, Luo Mengfei1, Li Shaohua1, Wu Hongli2   

  1. 1. Catalysis Institute, Hangzhou University, Hangzhou 310028;
    2. Central Laboratory, Hangzhou University, Hangzhou
  • Received:1995-10-30 Revised:1996-04-01 Published:1996-08-10 Online:1996-08-10

摘要: 催化燃烧是一种消除有机废气污染的有效方法,催化剂是催化燃烧技术的关键之一探求用贱金属催化剂代替贵金属催化剂的研究具有重要的现实意义,并已引起人们广泛的关注.负载铬氧化物催化剂广泛应用于石油化学工业,它对烃类的加氢、脱氢、脱氢环化及烯烃聚合等都具有较高的活性,负载于γ-Al2O3.上的铬催化剂也可作为完全氧化催化剂,如甲苯的氧化,但详细报道甚少.

关键词: 氧化铬, 氧化银, 氧化铝, 负载催化剂, 还原特性, 一氧化碳, 氧化活性

Abstract: A series ofγ-Al2O3-supported Cr-Ag bimetallic and individual mono-metallic catalysts was prepared by wetness impregnation method.The oxidation activity of CO was determined in a gas flow system. The effect of promoter Ag was studied by BET, XRD and TPR. The activity of Cr/γ-Al2O3 catalyst for CO oxidation was relatively poor. As the silver loading increased, the temperature of 100% coversion of CO over Ag/γ-Al2O3 catalysts decreased rapidly. The oxidation activity of catalyst was evidently enhanced by the addition of Ag, and increased with the content of Ag. The result of TPR showed that Ag could substantially change the reducibility of catalyst, TM decreased about 75℃,and the oxidation activity of catalyst was promoted.

Key words: chromic oxide, silver oxide, alumina, supported catalyst, reducibility, CO, oxidation activity