THERMAL SCIENCE

International Scientific Journal

EXHAUST EMISSIONS OF METHANOL AND ETHANOL-UNLEADED GASOLINE BLENDS IN A SPARK-IGNITION ENGINE

ABSTRACT
In this study, the effect of unleaded gasoline and unleaded gasoline blended with 5% and 10% of ethanol or methanol on the performance and exhaust emissions of a spark-ignition engine were experimentally investigated. The engine tests were performed by varying the engine speed between 1000 and 4000 rpm with 500 rpm period at threefourth throttle opening position. The results showed that brakespecific fuel consumption increased while brake thermal efficiency, emissions of carbon monoxide (CO) and hydrocarbon (HCs) decreased with methanol-unleaded gasoline and ethanol-unleaded gasoline blends. It was found that a 10% blend of ethanol or methanol with unleaded gasoline works well in the existing design of engine and parameters at which engines are operating.
KEYWORDS
PAPER SUBMITTED: 2011-12-07
PAPER REVISED: 2012-01-14
PAPER ACCEPTED: 2012-02-04
DOI REFERENCE: https://doi.org/10.2298/TSCI111207034A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2013, VOLUME 17, ISSUE 1, PAGES [291 - 297]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence