Effectively promoted catalytic activity by adjusting calcination temperature of Ce-Fe-Ox catalyst for NH3-SCR

被引：13

作者：

Song, Zhongxian ^{[1
]}

Xing, Yun ^{[2
]}

Zhang, Tingji ^{[2
]}

Zhao, Jinggang ^{[2
]}

Wang, Junkai ^{[2
]}

Mao, Yanli ^{[1
]}

Zhao, Baolin ^{[1
]}

Zhang, Xuejun ^{[2
]}

Zhao, Min ^{[2
]}

Ma, Ziang ^{[2
]}

机构：

[1] Henan Univ Urban Construct, Fac Environm & Municipal Engn, Henan Key Lab Water Pollut Control & Rehabil Tech, Pingdingshan 467000, Peoples R China

[2] Shenyang Univ Chem Technol, Coll Environm & Safety Engn, Shenyang 110142, Liaoning, Peoples R China

来源：

APPLIED ORGANOMETALLIC CHEMISTRY | 2020年 / 34卷 / 03期

基金：

中国国家自然科学基金;

关键词：

calcination temperatures; selectivity catalytic reduction; sulfate species; surface acidity; NO REDUCTION; ENHANCED PERFORMANCE; MIXED OXIDES; NH3; CERIA; SCR; AMMONIA; SO2; COMBUSTION; RESISTANCE;

D O I：

10.1002/aoc.5446

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of Ce-Fe-O-x catalysts prepared by the different calcination temperatures (marked as CF-X, where X represented calcination temperature) were used to the selectivity catalytic reduction of NOx by NH3. The results explained the relationship between calcination temperature and the sulfate species over Ce-Fe-O-x, and then investigated the surface acidity and catalytic performance. The large amounts of sulfate species were formed over CF-450 and CF-550 while it was decomposed with further the increasing of calcination temperature, which resulted in the loss of surface acidity, causing a decrease in the catalytic activity over Ce-Fe-O-x. Thereby, the CF-450 catalyst showed the best catalytic activity and over 90% NOx conversion was obtained at 244-450 degrees C. Besides, the favored pore structure, more Fe3+ active species, higher Ce3+ concentration and the abundance of chemical adsorbed oxygen species, as well as the surface acid sites, would together contribute to the excellent catalytic activity of CF-450 catalyst.

引用

页数：9

共 56 条

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