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 for five test vehicles. The fuels listed below were all prepared from a common base gasoline and were blended to have equal octane ratings. They were Baseline, aromatic-enriched, 10% Ethanol blend, 16.4% Methyl tertiary-butyl ether (MTBE) blend, and 19.1% Ethyl tertiary-butyl ether (ETBE) blend. The five test vehicles represented different types of emissions 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-xylenes, formaldehyde, acetaldehyde, ethanol, MTBE, and nitrous oxide. In addition, evaporative emissions were analyzed for MTBE, benzene, and ethanol. The emission data from tests using the ethanol, MTBE, and ETBE blends were 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.
- Research Organization:
- Southwest Research Inst., San Antonio, TX (United States)
- OSTI ID:
- 5627622
- Report Number(s):
- PB-91-187583/XAB; CNN: EPA-68-C9-0004
- Country of Publication:
- United States
- Language:
- English
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ACETALDEHYDE
ADDITIVES
AIR POLLUTION CONTROL
ALCOHOLS
ALDEHYDES
ALKENES
ALKYLATED AROMATICS
AROMATICS
BENZENE
BUTADIENE
BUTENES
CATALYSTS
CATALYTIC CONVERTERS
CHALCOGENIDES
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
CONTROL
DIENES
EMISSION
ENVIRONMENTAL IMPACTS
EQUIPMENT
ETHANOL
ETHERS
ETHYLENE
EXHAUST GASES
FLUIDS
FORMALDEHYDE
FUEL ADDITIVES
FUELS
GASEOUS WASTES
GASES
GASOHOL
GASOLINE
HYDROCARBONS
HYDROXY COMPOUNDS
LIQUID FUELS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POLYENES
QUALITY ASSURANCE
TOLUENE
VEHICLES
WASTES
XYLENES