Remarkable performance of selective catalytic reduction of NOx by ammonia over copper-exchanged SSZ-52 catalysts

被引：70

作者：

Li, Rui ^{[1
]}

Zhu, Yujun ^{[2
]}

Zhang, Zhiping ^{[3
]}

Zhang, Chuanqi ^{[1
]}

Fu, Guangying ^{[1
]}

Yi, Xianfeng

Huang, Qintong ^{[1
]}

Yang, Fan ^{[1
]}

Liang, Weichi ^{[1
]}

Zheng, Anmin ^{[4
,5
]}

Jiang, Jiuxing ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Peoples R China

[2] Heilongjiang Univ, Sch Chem & Mat, Minist Educ, Key Lab Funct Inorgan Mat Chem, Harbin 150080, Peoples R China

[3] Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China

[4] Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China

[5] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 283卷

基金：

中国国家自然科学基金;

关键词：

Selective catalytic reduction; Cu-SSZ-52; Ion-exchange method; NOx elimination; SMALL-PORE ZEOLITES; SITU-DRIFTS; NH3-SCR; CU-SSZ-13; CU/SAPO-34; SCR; DEACTIVATION; MECHANISM; NH3; PHOSPHORUS;

D O I：

10.1016/j.apcatb.2020.119641

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The low-temperature catalytic performance of Cu-ion-exchanged SSZ-52 catalysts (with different amounts of ion-exchanged Cu) for the selective catalytic reduction of NOx by NH3 (NH3-SCR) is investigated. The Cu-ion-exchanged SSZ-52 catalysts are prepared by a new method by using fumed silica as the silicon source. Among the synthesized Cu-x-SSZ-52 catalyst series, Cu-2.4-SSZ-52 exhibits the highest NH3-SCR activity. In addition, the de-NOx performance of Cu-2.4-SSZ-52 is superior to that of Cu-2.4-SSZ-13. Moreover, the catalytic performance of Cu-2.4-SSZ-52 reduces only slightly after hydrothermal aging at 750 degrees C. The microporous structure, redox ability, acidity properties as well as the location and nature of the Cu species and the reactant adsorption process of the support and Cu-x-SSZ-52 catalysts are investigated in detail. Overall, the findings show that the unique structure and cages of SSZ-52 are responsible for its excellent catalytic performance.

引用

页数：10

共 53 条

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