Synergistic Effect of Ce-W in CeO2-WO3/TiO2 Catalyst on Performance of NH3-SCR Reaction

被引：0

作者：

Jiang P. ^{[1
]}

Wang Y. ^{[1
]}

Chen Y. ^{[2
]}

Yang Y. ^{[1
]}

Li J. ^{[1
]}

Xu X. ^{[1
]}

Jin L. ^{[1
]}

Fan K. ^{[1
]}

Hu B. ^{[3
]}

Feng M. ^{[2
]}

Wang Y. ^{[1
]}

Liu X. ^{[1
]}

机构：

[1] College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing

[2] Zhejiang Hailiang Eco. Mater. Co.，Ltd., Zhuji

[3] Hangzhou Xifu Environ. Technol. Co.，Ltd., Hangzhou

来源：

Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2024年 / 42卷 / 02期

关键词：

active sites; CeO[!sub]2[!/sub]-WO[!sub]3[!/sub]/TiO[!sub]2[!/sub; NH[!sub]3[!/sub]-SCR; specific surface area; synergistic effect;

D O I：

10.11785/S1000-4343.20240204

中图分类号：

学科分类号：

摘要：

Three kinds of CeO2-WO3/TiO2 catalysts were prepared by impregnating 15% CeO2 and WO3 on TiO2 supports with different specific surface areas，and their activities in ammonia selective catalytic reduction of NOx （NH3-SCR）were investigated. The physical and chemical properties of the catalysts，such as the structure，morphology and the state of Ce-W species，were systematically studied by means of various characterization methods. The results show that more Ce and W species are enriched on the low specific surface area TiO2 support，and the significant synergistic effect between them results in more Cen+-O2--Wn+ oxygen bridge bonds in the catalyst. Cen+-O2--Wn+ can promote the formation of Ce3+ and oxygen deficiency，and then improve the low temperature denitration performance of the catalyst. However，Ce and W species are more likely to enter into the TiO2 support with high specific surface area，or highly disperse on the surface of the carrier，which will lead to weakened interaction，so the low temperature activity of the obtained catalyst is relatively poor. © 2024 Editorial Office of Chinese Rare Earths. All rights reserved.

引用

页码：226 / 235

页数：9

共 46 条

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