Use of a predictive electrolyte equation of state for the calculation of the gas hydrate formation temperature in the case of systems with methanol and salts
Résumé
An electrolyte EOS based on Peneloux's non-electrolyte PR-EOS has been applied to the prediction of the temperature associated to the formation of gas hydrate from water-methanol-salts solutions. Original assumptions have been developed to allow the calculation of model ionic parameters from experimental solvation diameters. A mixing rule is used for the extension of the approach to water-methanol mixed solvents solutions. When applied to systems with CH4 and CO2 hydrates, the deviations between predicted equilibrium temperatures and calculated ones is less than I K over a wide range of conditions.