PREDICTION ACCURACY OF MULTICOMPONENT VAPOR-LIQUID EQUILIBRIUM DATA FROM BINARY PARAMETERS

Abstract

The prediction accuracy of the Wilson, NRTL, and Heil equations is shown on a wide variety of multicomponent completely miscible systems including two quinary, seven quaternary, sixty-nine ternary systems. Vapor phase nonideality was taken into consi- deration in all numerical calculations. This assumption improves generally the accuracy in the vapor composition and total pressure calculations for multicomponent systems which were obtained under the assumption of an ideal vapor phase. The Wilson equation seems to be the best of all the equations.