PREDICTION OF HENRY CONSTANTS OF GASES IN ELECTROLYTE-SOLUTIONS

Based on first order perturbation theory and a simplified radial distribution function, a molecular thermodynamic model for predicting the Henry's constants or gases in electrolyte solutions is established. Various forms of interactions including ion-dipole and ion-induced dipole are considered. The size parameters and energy parameters of the ions are estimated by a universal correlation equation suggested and Mavroyannis-Stephen's theory respectively. The model has been tested for 111 electrolyte solutions including 1-1, 1-2, 2-2, 1-3 type electrolytes and mixed electrolyte solutions over a wide range of temperatures and concentrations of electrolytes. In most cases, the predicted and experimental Henry's constants are in good agreement within the experimental errors.