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A Model for Estimating Vapor Pressures of Commingled Ethanol Fuels
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 29, 2007 by SAE International in United States
Annotation ability available
Commingling of fuels containing various concentrations of ethanol can occur in a vehicle fuel tank. It was not possible to estimate the RVPs of commingled ethanol containing fuels because they form complex non-ideal solutions. A nomograph and an equation were developed using the theory and experimental data for estimating the RVP of a commingled ethanol fuel blend from the RVPs of two base fuels containing any amounts of ethanol. The model is also useful for general purpose estimation of vapor pressures of ethanol/gasoline blends such as seasonal blending of E85 fuels with the right vapor pressure gasoline and the right amount of ethanol to meet the seasonal fuel vapor pressure requirement.
CitationReddy, S., "A Model for Estimating Vapor Pressures of Commingled Ethanol Fuels," SAE Technical Paper 2007-01-4006, 2007, https://doi.org/10.4271/2007-01-4006.
- Reddy S. R. “Prediction of Fuel Vapor Generation from a Vehicle Fuel Tank as a Function of Fuel RVP and Temperature,” SAE Paper 892089 1989
- Furey R. L. Perry K. L. “Vapor Pressures of Mixtures of Gasolines and Gasoline-Alcohol Blends,” SAE Paper 861557 1986
- Caffrey P. E. Machiele P. A. “In-Use Volatility Impact of Commingling Ethanol and Non-Ethanol Fuels SAE Paper 940765 1994
- Reddy S. R. SAE Paper 861556 1986
- Fredensland A. Jones R. L. Prausnitz J. M. “Group-Contribution Estimation of Activity Coefficients in Nonideal Liquid Mixtures,” AIChE Journal 21 1975 1086
- Gmehling J. “Vapor-Liquid Equilibria by UNIFAC Group Contribution - Revision and Extension 2,” Ind. Eng. Chem. Process Des. Dev. 21 1982 657
- “Standard Test Method for Vapor Pressure of Petroleum Products (Minimethod),” Method D5191 1998 Annual Book of ASTM Standards American Society of Testing and Materials Philadelphia 1998
- Barrow G. M. Physical Chemistry McGraw-Hill New York 1961 477
- “Handbook for Handling, Storing, and Dispensing E85,” US Department of Energy July 2006