Some of the problems encountered in the use of ruthenium as a Nitrogen Oxide reduction catalyst are described. The major problem of volatilization in high temperature oxidizing atmospheres has been overcome by providing a stabilizing matrix for the ruthenium. The stabilized catalyst, however, does not have good CO and HC oxidizing performance, such as is required when the Nitrogen Oxide catalyst is used for oxidation under cold start conditions. Coimpregnation of Pt and Ru is ineffective in improving this situation, and it was necessary to develop a novel procedure to improve catalyst oxidation activity. Engine dynamometer tests showed that the final catalyst performs well under all of the conditions to which it is subjected. The question which remains unanswered is the durability of the system.

  • Corporate Authors:

    Society of Automotive Engineers

    485 Lexington Avenue
    New York, NY  United States  10017
  • Authors:
    • Kobylinski, T P
    • TAYLOR, B W
    • Young, J E
  • Publication Date: 1974-2

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00264229
  • Record Type: Publication
  • Report/Paper Numbers: SAE Paper No. 740250
  • Files: TRIS
  • Created Date: Jan 9 1975 12:00AM