EFFECT OF CATALYTIC EMISSION CONTROL ON EXHAUST HYDROCARBON COMPOSITION AND REACTIVITY

Exhaust gases from fourteen 1970-4 model and twenty 1975-7 model General Motors cars were collected during 1975-8 Federal Test Procedure tests and analyzed by gas chromatography. Hydrocarbon reactivity was calculated from the chromatographic analyses, using several reactivity scales. The use of oxidation catalytic converters on the 1975-7 model cars greatly changed the exhaust hydrocarbon composition in comparison to 1970-4 model cars. In general, such use caused individual paraffins to increase in carbon percent and individual olefins and acetylene to decrease. Each of the reactivity scales evaluated indicated that converter cars produced exhaust hydrocarbon mixtures that were less reactive than those of nonconverter cars. The reductions in reactivity per gram ranged from about 10 to 35 percent. /GMRL/

  • Availability:
  • Supplemental Notes:
    • Presented at SAE Passenger Car Meeting, Troy, Michigan, 5-9 June 1978.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Jackson, M W
  • Publication Date: 1978-6

Media Info

  • Features: References;
  • Pagination: 27 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183060
  • Record Type: Publication
  • Report/Paper Numbers: SAE 780624, HS-025 526U
  • Files: HSL, TRIS
  • Created Date: Dec 3 1985 12:00AM