A data base was obtained for comparing the benzo(a)pyrene (BaP) emission rates from diesel automobiles with those from current-production, catalyst and noncatalyst gasoline automobiles. Exhaust particulate samples were collected on filters, using a large emission tunnel. The extractable portion of the exhaust particulate was removed by Soxhlet extraction, with a mixture of benzene and ethanol. The BaP determination was made by high-performance liquid chromatography, using fluoresence detection. The BaP emission rate from on Oldsmobile diesel car was the same as the average rate from seven noncatalyst gasoline cars, 2.7 micrograms per mile. The BaP mass concentration in the diesel particulate was five parts per million, about twenty times lower than in noncatalyst gasoline particulate. BaP emission rates showed no simple correlation with hydrocarbon or carbon monoxide emission rates. The catalytic converter reduced BaP emission by more than 95% on gasoline cars, but had no effect on BaP emission from a diesel car.

  • Supplemental Notes:
    • From the February 26-March 2, 1979 Meeting.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Williams, R L
  • Publication Date: 1979

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00301479
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: SAE 790419 Conf Paper
  • Files: TRIS
  • Created Date: Nov 27 1979 12:00AM