Seasonal impact of blending oxygenated organics with gasoline on motor-vehicle tailpipe and evaporative emissions
The evaporative and exhaust emissions from a 1988 GM Corsica with adaptive learning were measured with 4 fuels at 40F, 75F, and 90F. Test fuels were unleaded summer grade gasoline and a blend of this gasoline containing 8.1% ethanol. A refiner's blend stock and the blend stock containing 16.2 % methyl tertiary butyl ether (MTBE) were also included in the study. Regulated emissions (total hydrocarbons, CO, and NOx), detailed aldehydes, detailed hydrocarbons, ethanol, MTBE, benzene, and 1,3-butadiene were determined. Results indicated that higher levels of regulated emissions were produced at low temperatures. The blended fuels produced almost twice the evaporative hydrocarbon emissions at high temperatures as did the base fuels. 1,3-butadiene emissions decreased slightly with increasing temperatures. Ethanol and MTBE evaporative and exhaust emissions were greater at higher test temperatures. Acetaldehyde emissions from the use of ethanol fuel blend doubled. The MTBE fuel blend appeared to offer the most reduction in total hydrocarbon, carbon monoxide, and oxides of nitrogen for the fuels and temperatures tested.
- Research Organization:
- Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Research and Exposure Assessment Lab.
- OSTI ID:
- 6065641
- Report Number(s):
- PB-91-146571/XAB; EPA--600/J-90/303
- Country of Publication:
- United States
- Language:
- English
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Assessment of unregulated emissions from gasoline oxygenated blends
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ADDITIVES
AIR POLLUTION ABATEMENT
ALCOHOL FUELS
ALCOHOLS
ALDEHYDES
AROMATICS
AUTOMOBILES
BENZENE
BUTADIENE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
DIENES
ECOLOGICAL CONCENTRATION
ETHANOL
ETHANOL FUELS
EVAPORATION
EXHAUST GASES
FLUIDS
FUEL ADDITIVES
FUELS
GASEOUS WASTES
GASES
GASOHOL
GASOLINE
HYDROCARBONS
HYDROXY COMPOUNDS
LIQUID FUELS
MOBILE POLLUTANT SOURCES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
POLLUTION ABATEMENT
POLLUTION SOURCES
POLYENES
SEASONAL VARIATIONS
SYNTHETIC FUELS
UNLEADED GASOLINE
VARIATIONS
VEHICLES
WASTES