Masoud Behrouz - Department of Gas Engineering, Petroleum University of Technology, Ahwaz, Iran
Masoud Aghajani - Department of Gas Engineering, Petroleum University of Technology, Ahwaz, Iran

Solubility of hydrocarbons in water is important due to ecological concerns and new restrictions onthe existence of organic pollutants in water streams. Also, the creation of a thermodynamic model hasrequired an advanced study of the phase equilibrium between water (as a basis for the widest spreadmuds and amines) and gas hydrocarbon phases in wide temperature and pressure ranges. Therefore, itis of great interest to develop semi-empirical correlations, charts, or thermodynamic models forestimating the solubility of hydrocarbons in liquid water. In this work, a thermodynamic model basedon Mathias modification of Sova-Redlich-Kwong (SRK) equation of state is suggested using classicalmixing rules with new binary interaction parameters which were used for two-component systems ofhydrocarbons and water. Finally, the model results and their deviations in comparison with theexperimental data are presented; these deviations were equal to 5.27, 6.06, and 4.1% for methane,ethane, and propane respectively.

Methane, Ethane, Propane, Light Hydrocarbons, Solubility