What is the maximum pressure for UNIFAC simulations?
Thread Content
What is the maximum pressure for UNIFAC simulations?
I haven’t heard that the UNIFAC model itself has a pressure limit; the pressure limit is based on experimental data from references. However, by using the PRSV2 EOS + Wong-Sandler MR + UNIFAC model, it is possible to use experimental data at low pressures to predict phase equilibrium at high pressures.
In high-pressure systems, try not to use activity coefficient models; apply EOS to both the vapor and liquid phases, and pay attention to the mixing rules
In the PRSV2 EOS + Wong-Sandler MR + UNIFAC model, EOS is used for both the vapor and liquid phases; however, a ge-type mixing rule is employed instead of the traditional vdW mixing rule.
Please explain clearly how to use experimental data at low pressures to predict conditions at high pressures; I’m not very familiar with this