中华医学超声杂志

应用化学 ›› 1997, Vol. 0 ›› Issue (2): 75-77.

• 研究论文 • 上一篇    下一篇

Co-MgO催化剂上NO-程序升温表面反应和NO-CH4反应

钟依均1, 罗孟飞2   

  1. 1. 浙江师范大学化学系, Luo Mengfei;
    2. 杭州大学催化研究所, 杭州
  • 收稿日期:1996-08-13 修回日期:1996-11-25 出版日期:1997-04-10 发布日期:1997-04-10
  • 基金资助:
    浙江省教委基金

Temperature Programmed Surface Reaction of NO and NO-CH4 Reaction over CO-MgO Catalyst

Zhong Yijun1, Luo Mengfei2   

  1. 1. Department of Chemistry, Zhejiang Normal University, Jinhua 321004;
    2. Institute of Catalysis, Hangzhou University, Hangzhou
  • Received:1996-08-13 Revised:1996-11-25 Published:1997-04-10 Online:1997-04-10

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摘要： 众所周知, 选择性催化还原是消除NOx污染的有效手段. 自从Iwamoto等[ 1]发现Cu/ZSM-5催化剂具有烃类选择性还原NO的性能后, 有关这方面的研究集中在Cu/ZSM-5[ 2, 3],Co/ZSM-5[ 4, 5]和 Ga/ZSM-5[ 6, 7]上. 人们普遍认为 NO-CO 反应机理是 NO 首先在催化剂表面解离(NO(a)→N(a)+ O(a))[ 8, 9], 可见催化剂表面 NO 的解离对选择性还原反应起着重要作用.本文考察了 Co-MgO 催化剂上 NO 程序升温表面反应(TPSR)和 NO-CH4的反应性能.

关键词: NO, 程序升温表面反应(TPSR), NO-CH4反应, Co-MgO

Abstract: In this paper, the surface reaction of NO thermal desorption and NO-CH4 reaction activity over Co-MgO catalyst were investigated. The adsorpted NO undergoes extensive decomposition to form N2 and N2O. There are two N2 peaks which are attributed to N(a) +NO (a) →N2+O(a) and 2N(a)→N2 reactions, respectively. There is only one N2O peak which is attributed to N(a) +NO (a)→N2O reaction. Because the O(a) produced during NO decomposition remains on Co microcrystallites, no O2 peak is observed. The ratio of CO2 and N2 in the products is near 1/2, which indicates that the reaction can be described as 4NO+CH4→2N2+CO2+H2O.

Key words: NO, temperature programmed surface reaction, NO-CH4 reaction, Co-MgO

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