Investigation of Deviations from Ideality in the Two Liquid Phase Region of Systems of Medium Molecular Weight Hydrocarbon Mixtures and Water.
Abstract
Two-phase systems of liquid hydrocarbon mixture, containing medium molecular weight aromatic and aliphatic hydrocarbons, and water were examined in both equilibrium and kinetic experiments. Knowledge of the aqueous solution behavior of liquid hydrocarbon mixtures is important in determining the fate of hydrocarbon components of fuels and petroleum in environmental release situations. The equilibrium solute concentration for a component is given by the product of the pure compound solubility, its mole fraction in the hydrocarbon phase and its activity coefficient in the hydrocarbon phase. Hydrocarbon phase activity coefficients determined for binary hydrocarbon mixtures using static vapor pressure measurements (at 20 and 70 degs.) and those determined using water solubility results (at 20 and 70 degs.) did not differ significantly. This indicated that component aqueous phase activity coefficients did not decrease measurably in the presence of hydrocarbon co-solutes, in contradiction to some previously published observations, and that the presence of water in the hydrocarbon phase was not significant at these temperatures. Methods for predicting multicomponent mixture solubilities were demonstrated. Aqueous solution behavior of mixtures containing a chlorinated hydrocarbon or a fatty acid surfactant was also determined.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1986
- Accession Number
- ADA169752
Entities
People
- David R. Burris
- William G. Macintyre
Organizations
- Virginia Institute of Marine Science