A new predictive activity model for aqueous salt solutions

A general and predictive water activity coefficient model for brines has been developed. To predict the water activity of the brines, the model developed requires the knowledge of ionic radius, the charge on the ions, and the concentration of each salt. Mixing rules have been established for brines with different salts and brines containing alcohols. The model has proven to be consistent with experimental data. As a practical example, the model has been used to predict the inhibiting effect of salts on gas hydrate formation.