Rense, I have BIPs for PR-NRTL Wong Sandler Mixing rules, extended alpha function , BIPs are from Properties database
K12 0.134808
A12 1528.91
A21 2047.97
G12 0.336973
I attach
TXY diagrams at 2 Bar and 15 Bar
PXY diagram at 333 K
you can compare PXY at 333 K with that included in Modeling Vapor Liquid Equilibria (Orbey and Sandler)





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