物理化学学报 >> 2015, Vol. 31 >> Issue (5): 817-828.doi: 10.3866/PKU.WHXB201503253

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铈基催化剂用于NH3选择性催化还原NOx的研究进展

姚小江1, 贡营涛1,2, 李红丽1, 杨复沫1,3   

  1. 1 中国科学院重庆绿色智能技术研究院, 水库水环境重点实验室, 重庆400714;
    2 重庆工商大学, 催化与功能有机分子重庆市重点实验室, 重庆400067;
    3 长江师范学院, 重庆408100
  • 收稿日期:2015-01-19 修回日期:2015-03-23 发布日期:2015-05-08
  • 通讯作者: 姚小江, 杨复沫 E-mail:yaoxj@cigit.ac.cn;fmyang@cigit.ac.cn
  • 基金资助:

    重庆市科学技术委员会项目(cstc2013jcsf20001, cstc2014pt-gc20002)和重庆文理学院环境材料与修复技术重庆市重点实验室开放课题基金(CEK1405)资助

Research Progress of Ceria-Based Catalysts in the Selective Catalytic Reduction of NOx by NH3

YAO Xiao-Jiang1, GONG Ying-Tao1,2, LI Hong-Li1, YANG Fu-Mo1,3   

  1. 1 Key Laboratory of Reservoir Aquatic Environment of CAS, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China;
    2 Chongqing Key Laboratory of Catalysis and Functional Organic Molecules, Chongqing Technology and Business University, Chongqing 400067, P. R. China;
    3 Yangtze Normal University, Chongqing 408100, P. R. China
  • Received:2015-01-19 Revised:2015-03-23 Published:2015-05-08
  • Contact: YAO Xiao-Jiang, YANG Fu-Mo E-mail:yaoxj@cigit.ac.cn;fmyang@cigit.ac.cn
  • Supported by:

    The project was supported by the Chongqing Science & Technology Commission, China (cstc2013jcsf20001, cstc2014pt-gc20002) and Open Project Program of the Chongqing Key Laboratory of Environmental Materials and Remediation Technology from Chongqing University of Arts and Sciences, China (CEK1405).

摘要:

源自固定源(如燃煤电厂烟气)和移动源(如机动车尾气)排放的氮氧化物(NOx)造成了严重的大气污染,对其进行减排控制已迫在眉睫. 研究表明, 氨选择性催化还原(NH3-SCR)技术是消除NOx的最有效手段之一.铈基催化剂因其良好的氧化还原性能、适当的表面酸性、较高的储/释氧容量以及丰富的资源储备而被广泛用于NH3-SCR反应. 探讨铈基组分在该反应中发挥的具体作用, 有助于了解相关催化过程的本质, 为现有催化剂的优化和新型催化剂的设计提供科学参考. 基于CeO2在NH3-SCR催化剂中扮演的不同角色, 本文从CeO2作为载体、铈基复合氧化物、表面负载组分(助剂和活性组分)以及特殊结构的铈基催化剂等方面系统地介绍了近年来铈基催化剂在NH3-SCR反应中的最新研究进展, 并对该领域未来可能的发展方向进行了展望.

关键词: 铈基催化剂, 氮氧化物, NH3选择性催化还原, 载体, 复合氧化物, 表面负载组分, 特殊结构

Abstract:

Nitrogen oxides (NOx), which are emitted from stationary sources (such as coal-fired power plant flue gases) and mobile sources (such as motor vehicle exhausts), cause serious atmospheric pollution. As a result, it is very important to control the emissions of NOx. Some studies have suggested that NH3-selective catalytic reduction (NH3-SCR) of NOx is one of the best techniques for this purpose. Ceria-based catalysts are widely used in the NH3-SCR reaction because of their good redox ability, suitable surface acidity, high oxygen storage or release capacity, and rich resource reserves. Investigating the role of ceria component in this reaction is important to understand the nature of the related catalytic process, and provides a valuable scientific reference for the optimization of existing catalysts and the design of novel catalysts. Based on the different roles of ceria in NH3-SCR catalysts, we have performed a systematic review of the latest research progress of ceria-based catalysts in the NH3-SCR reaction for the following aspects: CeO2 used as supports, ceria-based mixed oxides, surface loading components (additives and active species), and ceria-based catalysts with special structures. Finally, we discuss the future directions of this field.

Key words: Ceria-based catalyst, Nitrogen oxide, Selective catalytic reduction by NH3, Support, Mixed oxide, Surface loading component, Special structure

MSC2000: 

  • O643