Solubility of hydrocarbons in water: Experimental measurements and modeling using a group contribution with association equation of state (GCA-EoS)

Selva Pereda (1) , Javeed A. Awan (2) , Amir H. Mohammadi (3) , Alain Valtz (3) , Christophe Coquelet (3) , Esteban A. Brignole (1) , Dominique Richon (3)

1 PLAPIQUI - Planta Piloto de Ingeniería Química [Bahía Blanca]
2 CEP - Centre Énergétique et Procédés
3 CEP/Fontainebleau

In this communication, new experimental data on the solubility of n-hexane, cyclo-hexane and iso-octane in pure water are reported. The data have been measured using a static-analytic technique that takes advantage of a RolSi (TM) sampling device in the temperature range of 298-353 K and at pressures up to 0.5 MPa. The experimental data measured in this work at 298 K have been compared with some selected data from the literature and good agreement is found. A group contribution plus association equation of state, namely the GCA-EoS, is used to model the phase equilibrium of water + hydrocarbon (C-2 to n-C-6, cy-C-6, i-C-4 and i-C-8) system. The predictions of the model are found in good agreement with the experimental data measured in this work and some selected data from the literature.

Mots clés: GCA-EoS; Equation of state; Water; Hydrocarbon; Phase equilibria; Experimental measurement; Normal hexane; Cyclo-hexane and Iso-octane

Domaines: Energétique; Génie des procédés

Selva Pereda, Javeed A. Awan, Amir H. Mohammadi, Alain Valtz, Christophe Coquelet, et al.. Solubility of hydrocarbons in water: Experimental measurements and modeling using a group contribution with association equation of state (GCA-EoS). Fluid Phase Equilibria, 2009, 275 (1), pp.52- 59. ⟨10.1016/j.fluid.2008.09.008⟩. ⟨hal-00509648⟩