Investigation on sulphation and regeneration of a commercial monolithic NOx-storage/reduction catalyst

被引：4
|
作者：
Schreier, E [1 ]
Eckelt, R [1 ]
Richter, M [1 ]
Fricke, R [1 ]
机构：
[1] ACA, Inst Appl Chem, D-12474 Berlin, Germany
来源：
CATALYSIS COMMUNICATIONS | 2005年 / 6卷 / 06期
关键词：
NSR monolith; sulphation; regeneration; lean-rich cycle;
D O I：
10.1016/j.catcom.2005.03.006
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：
Sulphur poisoning and regeneration of a commercial NSR catalyst by SO2 were investigated in dependence on temperature and lambda value. The amount of desorbed sulphur compounds during lean-rich regeneration cycles was found to increase with decreasing lambda value (0.99-0.94) at constant temperature and with increasing temperature (660-720 degrees C) at constant lambda value. At a regeneration temperature of 660 degrees C, removed sulphur components comprises mainly SO2 at lambda values near 1, whereas H2S and COS are released at lower lambda values. At higher regeneration temperatures and low lambda values more SO2 is released, but COS and H2S formation also increases. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：409 / 414
页数：6
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