An accurate model for prediction of gas hydrate formation conditions in mixtures of aqueous electrolyte solutions and alcohol

A new thermodynamic model for calculating the hydrate formation temperature of different hydrate formers in aqueous solutions of both electrolytes and a single alcohol has been presented. This method uses a generalization of the Aasberg-Petersen model for water activity. For calculation of water act ivity in the presence of electrolytes, the effect of alcohols was taken int o account without using any new fitting parameters. The results are in good agreement with published experimental data. Calculated values of the hydra te formation temperature in the presence of alcohols and electrolytes are c ompared with those obtained by other existing models. The average absolute error of hydrate formation temperature for 524 available experimental data points is about 0.87 K.