STUDY OF NH SUB 3 FORMATION AND ITS CONTROL IN THE NOX CATALYST SYSTEM

NH sub 3 formation was investigated as a function of such feed gas boundary conditions as CO concentration, CO/O sub 2 ratio, space velocity, linear velocity and catalyst bed temperature. Both fresh and aged NOX catalysts were used. Logitudinal patterns of NH sub 3 formation in monolithic NOX catalyst were also determined. Several ideas were tested to reduce NH sub 3 formation in the NOX catalyst through control of feed H sub 2, O sub 2, CO and HC concentrations. Finally, the possibility of extending the optimum A/F range of a NOX catalyst toward leaner A/F ratios by the introduction of methane ahead of the NOX catalyst is discussed. /GMRL/

  • Supplemental Notes:
    • From Inter-Industry Emission Control Program 2, SAE SP-403.
  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • KURODA, H
    • NAKAJIMA, Y
    • Saito, T
    • Oguri, T
    • NAGAI, T
  • Publication Date: 1976-2

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00145292
  • Record Type: Publication
  • Report/Paper Numbers: SAE 760200
  • Files: TRIS
  • Created Date: May 31 1977 12:00AM