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Improvement of NO x storage-reduction catalyst
Technical Paper
2001-08-0258
Sector:
Event:
JSAE Autumn Conference
Language:
Japanese
Abstract
In order to improve the performance of NOx storage- reduction catalysts (NSR catalysts) further, we focused on the high temperature performance deteriorated by sulfur poisoning. The reaction between the basicity or acidity of supports and storage element, potassium has been analyzed. We found that high temperature performance of NSR catalysts is enhanced by the interaction between potassium and zirconia, which is a basic metal oxide. Then, we developed new zirconia-titania complex metal oxides to improve its high temperature performance after the durability and also promoted the desorption of sulfur from the supports.