HC-SCR of NOx over Ag/alumina:: a combination of heterogeneous and homogeneous radical reactions?

被引：14

作者：

Arve, K

Popov, EA

Klingstedt, F

Eränen, K

Lindfors, LE

Eloranta, J

Murzin, DY

机构：

[1] Abo Akad Univ, Lab Ind Chem, Proc Chem Ctr, Turku 20500, Finland

[2] Univ Jyvaskyla, Dept Chem, Jyvaskyla 40500, Finland

来源：

CATALYSIS TODAY | 2005年 / 100卷 / 3-4期

关键词：

HC-SCR; Ag/alumina; MS; EPR; FT-IR; matrix isolation;

D O I：

10.1016/j.cattod.2004.10.017

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Matrix isolation combined with EPR and FT-IR technique at low temperature has been used to study the gas phase species involved in HC-SCR over a highly active Ag/alumina catalyst. A combination of heterogeneous and homogeneous (radical) reactions is proposed to take place over a Ag/alumina catalyst during HC-SCR. Radicals of low molecular weight were trapped in a growing argon matrix behind the Ag/alumina catalyst. In the same matrix, cyanogen isocyanate was detected and is suggested to be a key intermediate for the formation of amines and ammonia via the hydrolysis of isocyanate species. (c) 2004 Elsevier B.V. All rights reserved.

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收藏

页码：229 / 236

页数：8

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