Huron-Vidal mixing

SRK with Huron-Vidal/NRTL mixing is evaluated for ethanol/n-heptane and methanol/benzene. Complete isotherms are held out before fitting, so the gray panels and holdout symbols test temperature transfer rather than random point-wise interpolation.

Complete phase diagrams

Filled and open experimental markers distinguish liquid and vapor compositions. The model curves are bubble solutions evaluated at the measured liquid compositions; equal-composition azeotropic states are retained.

Parity and temperature transfer

Pressure and vapor-composition panels are shown separately because an improvement in one observable can conceal deterioration in the other. The temperature-resolved view also exposes system-specific transfer behavior. These are binary-specific fitted parameters, not predictive group-contribution parameters.

Sources: Huron and Vidal (1979); Jaubert et al. (2020), reviewed binary collection; Berro et al. (1982); Ratcliff and Chao (1969); Toghiani et al. (1994); and Strubl et al. (1972).