UNIFAC model

The models/thermodynamics.a4l ASCEND code provides methods for calculating vapor-liquid equilibria (VLE).

Details on various group-contribution methods can be found here:

UNIQUAC:

• UNIQUAC model on Wikipedia

Original UNIFAC:

• Original UNIFAC

modified UNIFAC:

• Modified UNIFAC (Dortmund)

The predictive Soave-Redlich-Kwong (PSRK) equation of state combines the Soave-Redlich-Kwong cubic equation of state with the Mathias-Copeman equation and the UNIFAC group-contribution method:

• predictive Soave-Redlich-Kwong (PSRK)

The UNIFAC consortium manages the parameter database for the original UNIFAC, modified UNIFAC and PSRK model: The UNIFAC Consortium

See also Thermodynamics with ASCEND.