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Research Results on Processes and Catalyst Materials for Lean NOx Conversion
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Abstract
In a joint research project between industrial companies and a number of research institutes, nitrogen oxide conversion in oxygen containing exhaust gas has been investigated according to the following procedure
- Basic investigations of elementary steps of the chemical reaction
- Production and prescreening of different catalytic material on laboratory scale
- Application oriented screening of industrial catalyst material
- Catalyst testing on a lean bum gasoline engine, passenger car diesel engines (swirl chamber and DI) and on a DI truck engine
Although a number of solid body structures show nitrogen oxide reduction by hydrocarbons, only noble metal containing catalysts and transition metal exchanged zeolites gave catalytic efficiencies of industrial relevance. A maximum of 25 % NOx reduction was found in the European driving cycle for passenger cars, about 40 % for truck engines in the respective European test.
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König, A., Richter, T., Jobson, E., Preis, M. et al., "Research Results on Processes and Catalyst Materials for Lean NOx Conversion," SAE Technical Paper 962041, 1996, https://doi.org/10.4271/962041.Also In
References
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