eNRTL — Electrolyte non-random two-liquid method

The electrolyte non-random two-liquid (eNRTL) method is a liquid activity (LACT) coefficient model that we use primarily for electrolytic systems. In principle, it is a series expansion of the Gibbs free energy equation and is an extension of the NRTL method. When no electrolytic ions are present in the fluid, the eNRTL method reduces to the NRTL method.