SOx poisoning mechanism of NOx selective reduction catalysts

被引：25
|
作者：
Arakawa, K
Matsuda, S
Kinoshita, H
机构：
[1] Next Generation Catalyst Res. I., Kanagawa Science Park, Kawasaki-shi 213, 3-2-1 Sakado, Takatsu-ku
来源：
APPLIED SURFACE SCIENCE | 1997年 / 121卷
关键词：
NOx selective reduction; poisoning; Cu/ZSM5; SOx; XPS; NO adsorption;
D O I：
10.1016/S0169-4332(97)00338-3
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 poisoning mechanism of a Cu/ZSM5 catalyst by SOx at low temperature has been investigated, The catalysts tested in this paper were prepared with different ion-exchange loadings and conditions in order to produce catalysts with different Cu site compositions. The states of Cu in fresh and poisoned Cu/ZSM5 catalysts, especially stable Cu2+ were analyzed using XPS after a long X-ray irradiation. These data together with the activity test results suggested that Cu+ adsorbs SO2 and changes to stable Cu2+ in the presence of O-2, and thus loses its activity. (C) 1997 Elsevier Science B.V.
引用
收藏
页码：382 / 386
页数：5
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