Assessment of unregulated emissions from gasoline oxygenated blends
Four gasoline or gasoline-oxygenate blend fuels were used in the evaluation of regulated and unregulated emissions from five test vehicles. The fuels listed below were prepared from a common base gasoline. Baseline, aromatic-enriched (35.5% aromatics), 10% Ethanol blend (3.5% oxygen), 16.4% Methyl tertiary-butyl ether (MTBE) blend (3.0% oxygen), 19.1% Ethyl tertiary-butyl ether (ETBE) blend (3.0% oxygen). The five test vehicles represented different types of emission control technology: pre-catalyst, oxidation catalyst, three-way catalyst with closed-loop carburetor operation and an air pump, three-way catalyst with throttle body fuel injection, and three-way catalyst with port fuel injection. Each vehicle was operated with each fuel over the Federal Test Procedure (including evaporative emissions) for a total of 15 tests per vehicle. Several unregulated exhaust emissions were measured including ethylene, 1,3-butadiene, isobutylene, benzene, toluene, o-, m-, and p-sylenes, formaldehyde, acetaldehyde, ethanol, MTBE, and nitrous oxide. This paper reports the unregulated emission data from tests using the ethanol, MTBE, and ETBE blends compared to emissions produced from tests using the aromatic-enriched baseline fuel to determine if there were any statistically significant differences associated with the use of the blends. Regulated exhaust emissions (hydrocarbons, carbon monoxide, and oxides of nitrogen) and fuel economy were also measured on each test. In addition, evaporative emissions were analyzed for MTBE, benzene, and ethanol.
- OSTI ID:
- 5752634
- Report Number(s):
- CONF-9010205--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330102* -- Internal Combustion Engines-- Diesel
330701 -- Emission Control-- Nitrogen Oxides
330702 -- Emission Control-- Carbon Monoxide
ALCOHOL FUELS
AROMATICS
BENZENE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
EMISSION
ETHANOL FUELS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUELS
GASOLINE
HYDROCARBONS
LIQUID FUELS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
SYNTHETIC FUELS
VEHICLES