Sulphur dioxide interaction with NOx storage catalysts

被引：117

作者：

Engström, P

Amberntsson, A

Skoglundh, M ^{[1
]}

Fridell, E

Smedler, G

机构：

[1] Chalmers Univ Technol, Competence Ctr Catalysis, S-41296 Gothenburg, Sweden

[2] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1999年 / 22卷 / 04期

关键词：

sulphur dioxide; platinum; rhodium; barium oxide; catalyst deactivation; NOx storage; NOx reduction; lean burn; selective catalytic reduction; propene oxidation;

D O I：

10.1016/S0926-3373(99)00060-0

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 effect of SO2 on the NOx storage capacity and oxidation and reduction activities of a model Pt/Rh/BaO/Al2O3 NOx storage catalyst was investigated. Addition of 2.5, 7.5 or 25 vol. ppm SO2 to a synthetic lean exhaust gas caused deactivation of the NOx storage function, the oxidation activity and the reduction activity of the catalyst. The degree of deactivation of the NOx storage capacity was found to be proportional to the total SO2 dose that the catalyst had been exposed to. SO2 was found to be accumulated in the catalyst as sulphate. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：L241 / L248

页数：8

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