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
收藏
页码：60 / 64
页数：5
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