New Mechanistic Insights in the NH3-SCR Reactions at Low Temperature

被引：18
|
作者：
Ruggeri, M. P. [1 ]
Selleri, T. [1 ]
Nova, I. [1 ]
Tronconi, E. [1 ]
Pihl, J. A. [2 ]
Toops, T. J. [2 ]
Partridge, W. P. [2 ]
机构：
[1] Politecn Milan, Dipartimento Energia, Lab Catalysis & Catalyt Proc, Via La Masa 34, I-20156 Milan, Italy
[2] Oak Ridge Natl Lab, Fuels Engines & Emission Res Ctr, Oak Ridge, TN 37831 USA
来源：
TOPICS IN CATALYSIS | 2016年 / 59卷 / 10-12期
关键词：
Low temperature SCR; Cu zeolite; Fe zeolite; SCR mechanism; In situ DRIFTS; Chemical trapping; SELECTIVE CATALYTIC-REDUCTION; NO OXIDATION; SITU-DRIFTS; ZEOLITE CATALYSTS; CU-ZEOLITE; NH3; SCR; IDENTIFICATION; FE-ZSM-5;
D O I：
10.1007/s11244-016-0567-1
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The present study is focused on the investigation of the low temperature Standard SCR reaction mechanism over Fe- and Cu-promoted zeolites. Different techniques are employed, including in situ DRIFTS, transient reaction analysis and chemical trapping techniques. The results present strong evidence of nitrite formation in the oxidative activation of NO and of their role in SCR reactions. These elements lead to a deeper understanding of the standard SCR chemistry at low temperature and can potentially improve the consistency of mechanistic mathematical models. Moreover, comprehension of the mechanism on a fundamental level can contribute to the development of improved SCR catalysts.
引用
收藏
页码：907 / 912
页数：6
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