The deactivation of Ce/TiO2 catalyst for NH3-SCR reaction by alkali metals: TPD and DRIFT studies

被引：98

作者：

Wang, Shu-xian

Guo, Rui-tang ^{[1
]}

Pan, Wei-guo ^{[1
]}

Chen, Qi-lin

Sun, Peng

Li, Ming-yuan

Liu, Shu-ming

机构：

[1] Shanghai Univ Elect Power, Sch Energy Source & Mech Engn, Shanghai, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2017年 / 89卷

基金：

上海市自然科学基金;

关键词：

SCR; Ce/TiO2; catalyst; Alkali metal; Deactivation; Mechanism; LOW-TEMPERATURE; MN/TIO2; CATALYST; ENHANCED PERFORMANCE; SCR CATALYSTS; REDUCTION; NH3; NO; CERIA; RESISTANCE; MECHANISM;

D O I：

10.1016/j.catcom.2016.11.005

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：

The deactivation mechanism of alkali metals on the SCR catalyst of Ce/TiO2 was investigated by TPD and DRIFT studies. It could be found that the addition of Na or K on Ce/TiO2 catalyst would restrict the adsorption of NH3, accompanied by the generation of new sites for the adsorption of NOx species. But the new-absorbed NOx species were not active in the NH3-SCR reaction. The results of in situ DRIFT study indicated that the addition of Na and K did not change the SCR reaction mechanism, which was the combination of the Eley-Rideal and the Langmuir-Hinshelwood mechanisms. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：143 / 147

页数：5

共 33 条

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