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HERO ID
3441772
Reference Type
Journal Article
Title
Effects of ethanol, ethyl-tert-butyl ether and dimethyl-carbonate blends with gasoline on SI engine
Author(s)
Schifter, I; Gonzalez, U; Gonzalez-Macias, C
Year
2016
Is Peer Reviewed?
1
Journal
Fuel
ISSN:
0016-2361
EISSN:
1873-7153
Volume
183
Page Numbers
253-261
DOI
10.1016/j.fuel.2016.06.051
Web of Science Id
WOS:000381619400029
Abstract
The oxygenates ethanol (EtOH), ethyl-tert-butyl ether (ETBE), and dimethyl carbonate (DMC) were blended in a gasoline blendstock at levels of 2.8 wt% oxygen. Chemical and physical properties of the blends were compared to the requirements of ozone non-attainment areas in Mexico, particularly the percent of oxygen and the octane number but with reduced Reid vapor pressure with respect to the commercial regular gasoline sold in the area. Ethanol seems to be the additive that provides the highest fuel sensitivity (RON-MON) followed by the DMC blend. The blends were tested on a single cylinder spark ignition engine. Experiments were conducted for equivalence air-fuel ratio, fuel consumption, volumetric efficiency, brake thermal efficiency, brake power, engine torque and brake specific fuel consumption, while exhaust emissions were analyzed for carbon monoxide (CO), carbon dioxide (CO2) and nitrogen oxides (NOx). For all studied engine operation conditions (stoichiometric, rich and lean), baseline fuel presents the maximum cyclic dispersion; therefore, adding oxygenates makes more homogeneous cycle-by-cycle operation. The presence of DMC compensates for the reductions in combustion speed as the air fuel ratio becomes lean. Ethanol has similar effect; however, ETBE does not present this behavior. Additionally, EtOH and DMC burned 5-10% faster than ETBE and baseline gasoline under lean conditions. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords
ETBE; Dimethyl-carbonate; Additive; Combustion; Gasoline engine
Tags
IRIS
•
ETBE
Excluded / Not on Topic
Chemical analysis/fuel chemistry
NAAQS
•
ISA-Ozone (2020 Final Project Page)
Literature Search Results
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Keyword Search Excluded
•
Third Biofuels Report to Congress
50% to 100%
50% to 100%
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