Extension of the Group‐Contribution Equation of State Parameter Matrix for the Prediction of Phase Equilibria Containing Argon, Ammonia, Propene and Other Alkenes

The Group-Contribution Equation of State (GC-EOS) by Skjold-Jorgensen [1, 2] for predicting phase equilibria has been extended by groups (components) Ar and NH3 and olefin-groups C3H6, CH2 = CH, CH2 = C, CH = CH and CH = C. It was necessary to determine parameters for pure groups and to adjust binary interaction parameters. By comparison calculations were made using the Schmidt-Wenzel-EOS [3] and the hole model of Smirnova and Viktorov [4].