The composition of motor vehicle organic emissions under elevated temperature summer driving conditions (75 to 105F)

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Journal of the Air and Waste Management Association; (United States)

DOI:https://doi.org/10.1080/10473289.1992.10466977· OSTI ID:5317714

Stump, F D; Knapp, K T; Ray, W D ^[1]; Snow, R; Burton, C ^[2]

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1. Environmental Protection Agency, Research Triangle Park, NC (United States)
2. ManTech Environmental Technology, Inc., Research Triangle Park, NC (United States)

Emissions from seven late-model popular V-6 and V-8 motor vehicles were characterized at three test temperatures. Six vehicles fueled by port fuel injection (PFI) and one vehicle with a carbureted fuel system were tested at temperatures of 75, 90, and 105F with unleaded regular summer grade gasoline. Tailpipe and evaporative emissions were determined at each test temperature. Measured emissions were the total hydrocarbons (THCs), speciated hydrocarbons, speciated aldehydes, carbon monoxide (CO), oxides of nitrogen (NO{sub x}), benzene, and 1,3-butadiene. In general, tailpipe emissions of THC, benzene, and 1,3-butadiene from the vehicles were not temperature sensitive, but the Co and NO{sub x} emissions showed some temperature sensitivity. Formaldehyde, acetaldehyde, and total aldehyde emissions from the PFI vehicles were also not temperature dependent, while formaldehyde emissions from the carbureted vehicle decreased slightly with increasing test temperature. Evaporative THC emissions generally increased with increasing test temperature. Hydrocarbon emissions saturated and broke through the evaporative carbon canister of one PFI vehicle during the 105F hot soak while the other six vehicles showed no hydrocarbon breakthrough.

• OSTI ID: 5317714
• Journal Information: Journal of the Air and Waste Management Association; (United States), Journal Name: Journal of the Air and Waste Management Association; (United States) Vol. 42:2; ISSN JAWAE; ISSN 1047-3289
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020900 -- Petroleum-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ALDEHYDES
AROMATICS
BENZENE
BUTADIENE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
DIENES
EXHAUST GASES
FLUIDS
FORMALDEHYDE
FUELS
GASEOUS WASTES
GASES
GASOLINE
HYDROCARBONS
LIQUID FUELS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLYENES
TEMPERATURE DEPENDENCE
VEHICLES
WASTES