INITIAL PERFORMANCE OF SLIPPORTED NITROGEN OXIDE REDUCTION CATALYSTS IN A DUAL-CATALYST SYSTEM
The initial nitrogen oxide reduction acitivity of several alumina-supported, platinum-group metal catalysts is evaluated in vehicle tests. The nitrogen oxide catalysts included Ru, Ru-Pt, Ru-Pd, mechanical mixtures of Ru and Pt, Pt-Ni, Pt, and Rd. As evaluated over the 1975 FTP, the nitrogen oxide reducing effectiveness of these catalysts was: Ru combinations greater than Pt-Ni greater than Pt approximately equal to Pd. Modulated air injection was used, enabling the nitrogen oxide converters to be used as oxidizing converters during vehicle start-up. The nitrogen oxide reduction performance of all the nitrogen oxide catalysis was enhanced by bleeding a small amount of air into the nitrogen oxide converters.
New York, NY United States 10017
- Barnes, G J
- Publication Date: 1974-2
- Pagination: 11 p.
- TRT Terms: Air; Carbon monoxide; Catalysts; Flow; Hydrocarbons; Nitric oxide; Nitrogen oxides; Platinum; Pollutants; Reduction (Chemistry)
- Uncontrolled Terms: Air flow
- Old TRIS Terms: Emission rates
- Subject Areas: Highways; Safety and Human Factors;
- Accession Number: 00083627
- Record Type: Publication
- Report/Paper Numbers: SAE Paper No. 740251
- Files: TRIS
- Created Date: Apr 8 1975 12:00AM