HYSYS pressure limits in TXY diagrams

[babu27]

Sirs,
I wish to plot TXY diagrams for CH4-CO2 binary at pressures 30-50 Bar but I am getting errors, package is SRK, which is the
correct procedure for these cases ?
Thanks for assistance.

 

[PaoloPemi]

for your reference with SRK Properties (see

http://www.prode.com)

calculates the attached diagram at 50 Bar, note that at 50 Bar you are at very limit since the phase envelope with CH4 0.95 CO2 0.05 shows a CricondenBar of 49.6, you may notice that procedure doesn't calculate the 0.95 point