Seasonal impact of blending oxygenated organics with gasoline on motor vehicle tailpipe and evaporative emissions

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · Journal of the Air and Waste Management Association; (USA)

DOI:https://doi.org/10.1080/10473289.1990.10466732· OSTI ID:6647136

Stump, F D; Knapp, K T; Ray, W D ^[1]

---

1. Environmental Protection Agency, Research Triangle Park, NC (USA)

Emissions from a 1988 GM Corsica with adaptive learning closed loop control were measured with 4 fuels at 40, 75, and 90 degrees F. Evaporative and exhaust emissions were examined from each fuel at each test temperature. Test fuels were unleaded summer grade gasoline; a blend of this gasoline containing 8.1 percent ethanol; a refiner's blend stock; and the blend stock containing 16.2 percent methyl tertiary butyl ether. The ethanol and MTBE blends contained 3.0 percent oxygen by weight. Regulated emissions (total hydrocarbons, carbon monoxide, and oxides of nitrogen), detailed aldehydes, detailed hydrocarbons, ethanol, MTBE, benzene, and 1,3-butadiene were determined. The highest levels of regulated emissions were produced at the lower temperature. Blended fuels produced almost twice the evaporative hydrocarbon emissions at high temperatures as did the base fuels. Benzene emissions varied with fuels and operating temperatures, while 1,3-butadiene emissions decreased slightly with increasing temperatures. Formaldehyde emissions were not sensitive to fuel or temperature changes. Ethanol fuel blend total aldehyde emissions increased by 40 percent due to increased acetaldehyde emissions. Fuel blends had approximately a 3 percent economy decrease. 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.

• OSTI ID: 6647136
• Journal Information: Journal of the Air and Waste Management Association; (USA), Vol. 40:6; ISSN 1047-3289
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AUTOMOBILES
EXHAUST GASES
GASOLINE
CHEMICAL COMPOSITION
AIR POLLUTION
BENZENE
BUTADIENE
BUTYL ETHER
CARBON MONOXIDE
ECOLOGICAL CONCENTRATION
ETHANOL
FORMALDEHYDE
HYDROCARBONS
METHYL ETHER
MIXTURES
NITROGEN OXIDES
SEASONAL VARIATIONS
ALCOHOLS
ALDEHYDES
AROMATICS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DIENES
DISPERSIONS
ETHERS
FLUIDS
FUELS
GASEOUS WASTES
GASES
HYDROXY COMPOUNDS
LIQUID FUELS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION
POLYENES
VARIATIONS
VEHICLES
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)