Influence of Phosphorus Poisoning of Cu/SSZ-13 Zeolite Catalysts on the SCR Performance

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL

Chemical Engineering & Technology Pub Date : 2025-01-22 DOI:10.1002/ceat.202400124

Bin Guan, Junyan Chen, Zhongqi Zhuang, Xuehan Hu, Chenyu Zhu, Zeren Ma, Sikai Zhao, Jiangfeng Guo, Yuheng Yuan, Hongtao Dang, Kaiyou Shu, Kuangyi Shi, Yuan Li, Chao Yi, Wenbo Zeng, Chengze Xu, Zhihao Wei, Yang He, Zhen Huang

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Abstract

Herein, the influence of phosphorus poisoning on the catalytic performance of Cu/SSZ-13 zeolite catalysts for NO_x emission decrease was studied. We conducted a detailed analysis of catalyst activity and N₂ selectivity in both fresh and P-poisoned states, employing a range of advanced physicochemical characterization methods and in situ analyses. Our findings reveal a dual effect of phosphorus addition: Although it decreases the free Cu²⁺ species and specific surface area, leading to diminished SCR activity at low temperatures, it simultaneously reduces CuO_x content, inhibiting nonselective NH₃ oxidation at high temperatures and ultimately enhancing SCR activity under those conditions. These insights highlight the complex role of phosphorus in moderating catalyst behavior.

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来源期刊

Chemical Engineering & Technology 工程技术-工程：化工

CiteScore

3.80

自引率

4.80%

发文量

315

审稿时长

5.5 months

期刊介绍： This is the journal for chemical engineers looking for first-hand information in all areas of chemical and process engineering. Chemical Engineering & Technology is: Competent with contributions written and refereed by outstanding professionals from around the world. Essential because it is an international forum for the exchange of ideas and experiences. Topical because its articles treat the very latest developments in the field.