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

页码：382 / 386

页数：5

共 7 条

[1]

ARAKAWA K, 1996, SYOKUBAI, V38, P181

[2]

GABE M, 1995, P SME, P236

[3] INFLUENCE OF SULFUR-DIOXIDE ON CATALYTIC REMOVAL OF NITRIC-OXIDE OVER COPPER ION-EXCHANGED ZSM-5 ZEOLITE [J].