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.

Media Info

  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00083627
  • Record Type: Publication
  • Report/Paper Numbers: SAE Paper No. 740251
  • Files: TRIS
  • Created Date: Apr 8 1975 12:00AM