Promotional effects of cerium modification of Cu-USY catalysts on the low temperature activity of NH3-SCR

被引：18

作者：

Zhou, Jianmin ^{[1
]}

Zhao, Chengwei ^{[1
]}

Lin, Jiansong ^{[2
]}

Yang, Haipeng ^{[2
]}

Zhou, Renxian ^{[2
]}

机构：

[1] Wenzhou Med Univ, Sch Pharmaceut Sci, Wenzhou 325035, Zhejiang, Peoples R China

[2] Zhejiang Univ, Inst Catalysis, Hangzhou 310028, Zhejiang, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2018年 / 114卷

关键词：

Selective catalytic reduction; Ceria; Cu-USY; deNO(x); NH3-SCR; NITRIC-OXIDE; SITU-DRIFTS; REDUCTION; NH3; NOX; AMMONIA; ZEOLITE; SCR; PERFORMANCE; CU-SSZ-13;

D O I：

10.1016/j.catcom.2018.05.008

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：

A series of ceria-modified Cu-USY catalysts were prepared by a co-impregnation method and tested towards the selective reduction of NOx with NH3. A 5Cu-8Ce-USY catalyst with 8 wt% Ce content showed optimum low-temperature activity, and the widest NO conversion temperature window (160-410 degrees C) of operation, which these features are related to the enhanced redox ability and Cu+ species concentration in the sodalite cage compared to the Cu-USY catalyst. In addition, Lewis acid sites on the surface of Cu-Ce-USY catalysts were found to play a key role for its excellent SCR performance. The ceria-modified Cu-USY catalysts with enhanced low-temperature (120-170 degrees C) deNO(x) performance make them highly promising candidates for practical applications in controlling NOx emissions.

引用

页码：60 / 64

页数：5

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