Factors influencing the composition and quantity of passenger-car refueling emissions. Part 2. Final report

Technical Report · Wed Jul 01 00:00:00 EDT 1987

OSTI ID:6378500

Braddock, J N

The study measured and characterized refueling emissions from a 1986 Pontiac Grand Am using 3 test fuels, including a winter, summer, and intermediate-blend gasoline under a variety of seasonal temperature conditions. It investigated three major parameters that affect refueling emissions: fuel volatility, expressed as Reid Vapor Pressure (RVP); dispensed fuel temperature (Td); and tank fuel temperature (Tt). In the study, RVP varied from 10.0 to 13.3 psi, Td varied from 50 to 88 F, and Tt varied from 40 to 108 F, while the overall hydrocarbon (HC) refueling emission rate ranged from 2.90 to 7.41 grams/gallon. Detailed hydrocarbon analyses were completed for both the test fuels (dispensed fuel and tank fuel) and the refueling vapor. The overall mean (from all test fuels and temperature scenarios) HC emission rate was 4.69 g/gal; the mean refueling vapor was comprised of 79.7% paraffins, 13.6% olefins, 5.8% aromatics, with an average carbon number of 4.76; overall mean test gasoline was comprised of 39.5% paraffins, 7.7% olefins 49.0% aromatics, with an average carbon number of 7.30. Butanes and pentanes comprised about 70% of the total HC refueling vapor.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Sciences Research Lab.
• OSTI ID: 6378500
• Report Number(s): PB-87-212775/XAB; EPA-600/D-87/234
• Resource Relation: Other Information: See also Part 1, PB--86-148467
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
02 PETROLEUM
AUTOMOTIVE FUELS
AIR POLLUTION
GASOLINE
GASOLINE SERVICE STATIONS
HYDROCARBONS
EMISSION
BENZENE
MIXTURES
TEMPERATURE EFFECTS
TOLUENE
VAPORS
VOLATILITY
ALKYLATED AROMATICS
AROMATICS
COMMERCIAL SECTOR
DISPERSIONS
FLUIDS
FUELS
GASES
LIQUID FUELS
MARKETERS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION
RETAILERS
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020900 - Petroleum- Environmental Aspects