When the Ideal method (IDEAL) is selected, equilibrium K-values are computed as follows:
where:
P = system pressure
Ideal vapor densities are computed from the ideal gas equation and ideal liquid densities are obtained from pure component liquid density correlations.
Ideal liquid enthalpies are obtained from pure component liquid enthalpy correlations and the corresponding vapor enthalpies are obtained by adding the known latent heat of vaporization for the component at the system temperature. Note that no pressure corrections are applied to the enthalpies.
For additional information, see "Ideal" under "Generalized Correlation Methods" in PRO/II Reference Manual, Volume 1, Chapter 2.
Application Guidelines
Systems of similar components at low pressures and temperatures.