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Evaporative Emissions from Gasolines and Alcohol-Containing Gasolines with Closely Matched Volatilities
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1986 by SAE International in United States
Annotation ability available
Alcohol-gasoline blends have attracted considerable attention for a variety of reasons, including their higher evaporative emissions compared with gasolines. To better understand the reasons for higher evaporative emissions with blends and to determine if blends with similar volatility (closely matched Reid vapor pressure and distillation temperatures) to gasoline would have equivalent evaporative emissions, experimental and modelling studies were undertaken.
Evaporative emissions with alcohol-gasoline blends were nearly equal to or slightly lower than corresponding emissions with gasolines of similar volatility characteristics. By measuring vapor generation in the SHED test, it was determined that the alcohol-gasoline blends generated less mass of vapors than the corresponding gasolines. The mathematical model developed to predict the evaporative vapor losses from the fuel tanks showed that the lower vapor generation by the oxygenated fuels was due to their lower vapor pressures at the test temperatures and the lower molecular weights of the vapors generated by these fuels.
|Technical Paper||In-Use Volatility Impact of Commingling Ethanol and Non-Ethanol Fuels|
|Technical Paper||A Technical Assessment of Alcohol Fuels - Alternate Fuels Committee of the Engine Manufacturers Association|
CitationReddy, S., "Evaporative Emissions from Gasolines and Alcohol-Containing Gasolines with Closely Matched Volatilities," SAE Technical Paper 861556, 1986, https://doi.org/10.4271/861556.
SAE 1986 Transactions - Fuels and Lubricants
Number: V95-7; Published: 1987-09-01
Number: V95-7; Published: 1987-09-01
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