Research Results on Processes and Catalyst Materials for Lean NOx Conversion

Paper #:
  • 962041

Published:
  • 1996-10-01
Citation:
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.
Pages:
11
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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