Citation: ZHENG Wei, CHEN Jia-ling, GUO Li, ZHANG Wen-bo, ZHAO Hao-ran, WU Xiao-qin. Research progress of hydrothermal stability of metal-based zeolite catalysts in NH₃-SCR reaction[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(10): 1193-1207. shu

Research progress of hydrothermal stability of metal-based zeolite catalysts in NH₃-SCR reaction

Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China

Corresponding author: CHEN Jia-ling, chenjialing@wust.edu.cn WU Xiao-qin, wuxiaoqin@wust.edu.cn
Received Date: 4 August 2020
Revised Date: 6 September 2020

Fund Project: The Natural Science Foundation of Hubei Province 2018CFB361the National Natural Science Foundation of China 22002114The Wuhan Science and Technology Bureau 2018060401011311The project was supported by the National Natural Science Foundation of China (22002114), the Natural Science Foundation of Hubei Province (2018CFB361) and the Wuhan Science and Technology Bureau (2018060401011311)

Figures(4)

Emission of NO_x from stationary and mobile sources had caused many environmental problems. NH₃ selective catalytic reduction technology (NH₃-SCR) is one of the most effective technologies to eliminate NO_x based on developing high-efficient catalysts. In this review, the catalytic activity for NH₃-SCR, hydrothermal stability and deactivation mechanism of metal-based zeolite catalysts (mainly Cu- and Fe-based zeolite catalysts) employed in NH₃-SCR were summarized. The main factors affecting the hydrothermal stability of Cu- or Fe-based zeolite catalysts in NH₃-SCR, such as Si/Al ratio, zeolite topological structure, metal content, particle size and preparation methods of catalysts, were systematically reviewed. The modification approaches addressed in recent researches which could effectively improve the hydrothermal stability of metal-based zeolites in NH₃-SCR, such as element modification using phosphorus, second active metal, alkali (earth) metal, and surface modification, were discussed. Hopefully, this review could provide a fundamental understanding of the deactivation behaviors of Cu- and Fe-based zeolite catalysts and pave the way towards the improvement of hydrothermal stability of zeolite catalysts in NH₃-SCR.
- NO_x,
- NH₃-SCR,
- hydrothermal stability,
- zeolite
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Research progress of hydrothermal stability of metal-based zeolite catalysts in NH3-SCR reaction

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Research progress of hydrothermal stability of metal-based zeolite catalysts in NH₃-SCR reaction