Ceria supported on sulfated zirconia as a superacid catalyst for selective catalytic reduction of NO with NH3

被引：83
作者：
Gao, Shan [1 ]
Chen, Xiongbo [1 ]
Wang, Haiqiang [1 ]
Mo, Jiansong [2 ]
Wu, Zhongbiao [1 ,2 ]
Liu, Yue [1 ]
Weng, Xiaole [1 ]
机构：
[1] Zhejiang Univ, Dept Environm Engn, Hangzhou 310058, Zhejiang, Peoples R China
[2] Zhejiang Prov Engn Res Ctr Ind Boiler & Furnace F, Hangzhou 310027, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2013年 / 394卷
基金：
中国国家自然科学基金;
关键词：
NO reduction; SCR; Ammonia; Superacid; Ceria; Sulfated zirconia; SOL-GEL; RAMAN-SPECTROSCOPY; OXIDE CATALYSTS; REDOX; PERFORMANCE; ACIDITY; DENO(X); SILICA; STATE;
D O I：
10.1016/j.jcis.2012.12.034
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：
In this paper, ceria supported on sulfated zirconia (CeSZ) as a superacid catalyst was synthesized and the resulted performances for selective catalytic reduction (SCR) of NO with NH3 were investigated. Experimental results revealed that the sulfation of zirconia supports could greatly improve the SCR activity of the catalysts. Among the tested samples, the CeSZ catalyst with Ce/Zr mole ratio at 0.095 possessed the highest NO conversion (i.e., 98.6% at ca. 420 degrees C and 180,000 h(-1)). The sulfation had led to a formation of pure tetragonal phase of ZrO2, a well dispersion of CeO2, abundant stable superacid sites, increasing surface area and enrichment of Ce3+ on the surface, all of which were responsible for its excellent performance in SCR of NO with NH3. (C) 2013 Elsevier Inc. All rights reserved.
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收藏
页码：515 / 521
页数：7
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