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In-Use Volatility Impact of Commingling Ethanol and Non-Ethanol Fuels
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English
Abstract
An analysis of the potential Reid Vapor Pressure (RVP) impacts of the commingling of ethanol fuels with non-ethanol fuels has been done. This analysis includes a computer model that tracks such variables as owner brand loyalty, fill-up patterns, ethanol fuel market share and percent ethanol in the fuel tank to determine the RVP boost that is associated with the use of ethanol as a gasoline oxygenate as it intermingles with non-ethanol fuels in vehicle fuel tanks. Results indicate that the use of ethanol oxygenated fuels can cause, in some cases, a significant increase in gasoline RVP, thus leading to higher evaporative emissions.
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Authors
Citation
Caffrey, P. and Machiele, P., "In-Use Volatility Impact of Commingling Ethanol and Non-Ethanol Fuels," SAE Technical Paper 940765, 1994, https://doi.org/10.4271/940765.Also In
References
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- U.S. Environmental Protection Agency “Draft Regulatory Impact Analysis, Control of Gasoline Volatility and Evaporative Hydrocarbon Emissions from New Motor Vehicles” July 1987
- General Motors Corp. Letter to U.S. Environmental Protection Agency May 21 1993
- Environmental Protection Agency's Mobile 5.0 Vehicle Emissions Model
- Furey Robert L. Perry Kevin L. “Vapor Pressures of Mixtures of Gasoline and Gasoline-Alcohol Blends,” Society of Automotive Engineers (SAE) 861557
- Fury Robert L. “Volatility Characteristics of Gasoline-Alcohol and Gasoline-Ether Fuel Blends,” Society of Automotive Engineers (SAE) 852116