Most automotive catalysts function best in the narrow operating window near the stoichiometric air/fuel ratio with the active reductants favoring oxygen over nitric oxide as an oxidizing agent. Discovery of catalysts able to reduce NO and NO//2 to N//2 in the presence of excess oxidants promises future development of good catalytic conversion of air/fuel ratios leaner than stoichiometric. A proprietary catalyst known as Leanox has been developed to accomplish this. Leanox was found to have significantly higher selectivity factors than the fresh Ir or the treated Pt and Rh catalysts. The use of this catalyst upstream of a conventional three-component control catalyst resulted in increasing lean-side NO conversion by a factor of as much as three.

Media Info

  • Pagination: p. 68-72
  • Serial:
    • Automotive Engineering
    • Volume: 86
    • Issue Number: 5
    • Publisher: Society of Automotive Engineers (SAE)
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00183260
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Dec 12 1978 12:00AM