高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (4): 628.

• 研究论文 • 上一篇    下一篇

Ag-ZSM-5催化剂上CH4选择催化还原NOx的研究

石川1,2, 程谟杰1, 曲振平1, 杨学锋2, 包信和1   

  1. 1. 中国科学院大连化学物理研究所催化基础国家重点实验室, 大连 116023;
    2. 大连理工大学等离子体物理化学研究室, 大连 116024
  • 收稿日期:2001-03-21 出版日期:2002-04-24 发布日期:2002-04-24
  • 通讯作者: 包信和(1959年出生),男,博士,研究员,博士生导师,主要从事金属催化剂表面特性的研究.E-mail:xhbao@dicp.ac.cn E-mail:xhbao@dicp.ac.cn
  • 基金资助:

    国家自然科学基金(批准号:20003011)和"973"计划资助.

Studies on Selectively Catalytic Reduction of NOx by Methane over Ag-ZSM-5 Catalysts

SHI Chuan1,2, CHENG Mo-Jie1, QU Zhen-Ping1, YANG Xue-Feng2, BAO Xin-He1   

  1. 1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    2. Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian 116024, China
  • Received:2001-03-21 Online:2002-04-24 Published:2002-04-24

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摘要： 摘要研究Ag-ZSM-5催化剂上CH4选择性催化还原NOx的反应性能,采用TPD和TPSR技术研究NO和O2共吸附于Ag-ZSM-5催化剂表面形成的吸附物种及其和CH4之间的反应。结果表明,Ag-ZSM-5催化剂上CH4选择性还原NOx活性和选择性较高。NO和O2共吸附在Ag-ZSM-5催化剂上形成的NO3(s)吸附物种能被CH4还原生成N2.在NO3(s)和O2共存的体系中,CH4能优先并选择性还原NO3(s)生成N2.

关键词: Ag-ZSM-5, 甲烷, 选择性还原, NO3(s)物种

Abstract: Ag-ZSM-5 catalysts were investigated for the selectively catalytic reduction of NO by methanein the excess of oxygen.The adsorption properties of NOx and the reaction of absorbed NOx with CH4 werestudied through TPD and TPSR measurements.NOx was effectively and selectively reduced by CH4 overAg-ZSM-5 catalysts.The co-adsorption of NO and O2 over Ag-ZSM-5 catalyst led to the formation of ad-sorbed NO3 species, which could be effectively reduced by CH4. Even in the presence of O2, NO3 specieswere more reactive than O2. The priority of CH4 reaction with surface NO3-species to form N2 was clearlyobserved.

Key words: Ag-ZSM-5, CH4, Selective reduction, NO3-species

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