Three-phase distillation
Thread Content
What types of systems require three-phase distillation? Page 232 of \"Chemical Process Simulation Training – ASPEN Tutorial\" discusses some systems. So how exactly can one determine whether three-phase distillation is necessary?
Firstly, a three-phase system will be generated, and for that the L and L phases need to be separated
VLL distillation can be considered as long as the tray configuration is used to handle the two-phase region at the given temperature and pressure, and the liquid residence time is sufficient. Simplified treatment uses VL distillation; the energy consumption results for both are similar. However, in some systems, VLL calculations are necessary to analyze the ternary phase diagram, otherwise single-column distillation may cross the distillation boundary.
If there are LL phases at the given temperature and pressure in the tray composition, VL distillation is used, which leads to errors in the calculation of the temperature composition