Interaction parameters within TEA property package

[Stephan]

Thanks, now this is a bit clearer to me.

One more question regarding BIPs within NRTL:

Can BIPs for binary pairs that contain one or two gases (which won't be liquids, but may be solved within liquids) be neglected and set to zero or will there be significant errors when calculating
liquid excess enthalpy and VLE in that case?

[jasper]

There's really no way to tell that offhand without experimental data.