化工进展 ›› 2023, Vol. 42 ›› Issue (9): 4636-4648.DOI: 10.16085/j.issn.1000-6613.2022-1932

• 工业催化 • 上一篇    下一篇

机动车尾气脱硝催化剂Cu-SSZ-13的改性研究进展

王晋刚1(), 张剑波1, 唐雪娇2(), 刘金鹏2, 鞠美庭2   

  1. 1.河北工业大学化工学院,天津 300130
    2.南开大学环境科学与工程学院,天津 300350
  • 收稿日期:2022-10-18 修回日期:2023-01-11 出版日期:2023-09-15 发布日期:2023-09-28
  • 通讯作者: 唐雪娇
  • 作者简介:王晋刚(1976—),男,博士,副教授,硕士生导师,研究方向为大气污染防治。E-mail:thunk@126.com
  • 基金资助:
    天津市重点研发项目(20YFZCSN00370);国家自然科学基金(51308306);天津市自然科学基金(18JCTPJC54100)

Research progress on modification of Cu-SSZ-13 catalyst for denitration of automobile exhaust gas

WANG Jingang1(), ZHANG Jianbo1, TANG Xuejiao2(), LIU Jinpeng2, JU Meiting2   

  1. 1.School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China
    2.College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
  • Received:2022-10-18 Revised:2023-01-11 Online:2023-09-15 Published:2023-09-28
  • Contact: TANG Xuejiao

摘要:

Cu-SSZ-13催化剂具有优异的CHA骨架结构,在机动车尾气脱硝领域具有很好的应用前景,目前在欧洲已经实现商业应用。为解决尾气中硫氧化物和水热冲击对Cu-SSZ-13骨架和活性位点产生的损害问题,对其进行改性是目前的研究重点。本文归纳了近年来针对Cu-SSZ-13催化活性位点的研究进展以及水热老化、硫中毒导致其失活的机理研究成果;重点论述了针对Cu-SSZ-13催化活性和耐受性能提升的最新改性方法(包括创建新型纳米结构、构建中毒牺牲位点、金属掺杂改性等),以期为提升Cu-SSZ-13催化性能和抗中毒性能研究提供新思路;对Cu-SSZ-13改性技术的未来发展进行展望,提出通过特定金属掺杂和新颖制备方法来控制沸石内的离子种类可实现调控活性位点的创新思路。最后针对性讨论了催化剂改性过程中需要解决的关键问题。

关键词: Cu-SSZ-13, NH3-选择性催化还原, 水热失活, 硫中毒, 改性

Abstract:

Cu-SSZ-13 is an excellent deNO x catalyst with CHA skeleton structure, and thus it possesses good application prospect in the field of vehicle exhaust deNO x and has been applied commercially in Europe. However, the hydrothermal deactivation and sulfur poisoning of Cu-SSZ-13 will cause serious damage to the CHA skeleton structure and active sites of Cu-SSZ-13 and has limited its development. In order to solve these problems, the modification of Cu-SSZ-13 catalyst has become the focus of current research. The recent research progress on the active sites of Cu-SSZ-13 catalyst and the mechanism of its deactivation caused by hydrothermal aging and sulfur poisoning were summarized. Also, the latest modification methods aimed at improving the catalytic activity and tolerance of Cu-SSZ-13, such as creating new nanostructures, constructing poisoning sacrifice sites, metal doping modification, were discussed, which provides a new thought for enhancing the catalytic performance and anti-poisoning performance of Cu-SSZ-13. Furthermore, the future development of Cu-SSZ-13 modification technology was prospected with the innovative idea of regulation of the active site by specific metal doping and novel preparation methods to control the type of ions in the zeolite. Finally, the essential problems to be solved in catalyst modification were discussed.

Key words: Cu-SSZ-13, NH3-SCR, hydrothermal deactivation, sulfur poisoning, modification

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