Study on Effect and Mechanism of Alkaline Earth Metal Poisoning on Cu/SSZ-13 Catalysts for Selective Catalytic Reduction of NO x with NH3

被引：9

作者：

Guan, Bin ^{[1
]}

Chen, Junyan ^{[1
]}

Guo, Jiangfeng ^{[1
]}

Liu, Ziqian ^{[1
]}

Zheng, Chunzheng ^{[1
]}

Zhou, Jiefei ^{[1
]}

Su, Tianxu ^{[1
]}

Zhang, Yaoyao ^{[1
]}

Yuan, Yuheng ^{[1
]}

Dang, Hongtao ^{[1
]}

Xu, Bingyu ^{[1
]}

Xu, Chengze ^{[1
]}

Zeng, Wenbo ^{[1
]}

Huang, Zhen ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Key Lab Power Machinery & Engn, Minist Educ, Shanghai 200240, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2023年 / 62卷 / 25期

基金：

中国国家自然科学基金;

关键词：

NH3-SCR; CU/SAPO-34; ZEOLITE; ACIDITY; PERFORMANCE; STABILITY; CU-SSZ-13; SCR; FE;

D O I：

10.1021/acs.iecr.3c01262

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In order to study the poisoning effect of the alkalineearth metalon Cu/SSZ-13 and reveal the poisoning mechanism, Cu/SSZ-13 zeolitecatalysts were synthesized by the ion-exchange method and poisonedby different concentrations of Mg and Ca. The results of SCR testsand characterizations showed that the SCR activity of Cu/SSZ-13 catalystsdecreased obviously after Mg or Ca poisoning, which is because Mgand Ca reduced the Cu2+ species and Bronsted acidsites in Cu/SSZ-13, while increasing the content of Cu x O y . Furthermore, Mg andCa on the catalyst surface could block the pores of the zeolite andthen decrease the specific surface area of the catalysts, and Ca couldfurther cause partial collapse of the zeolite skeleton. Through thisarticle, the effect and mechanism of alkali earth metal poisoningof Cu/SSZ-13 were revealed, which provided data and theory supportfor the development of efficient Cu/SSZ-13 NH3-SCR catalystswith high alkali earth metal resistance.

引用

页码：9662 / 9672

页数：11

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