Question 3 [20 marks] a. Simulation of multicomponent distillation in process simulation environment (e.g. Aspen Hysys, Aspen Plus, ChemCad) is very handy. Nevertheless, the approximate methods using Fenske Underwood Gilliland Kirkbride

equations cannot be undermined. Can you please explain how these approximate methods are useful to establish the simulation using simulation package? [10 marks] b. Can you please elaborate the advantages and limitations of MESH equations for the multicomponent distillations? In line with the limitations, you should also highlight the ways to overcome the challenges of the implementation. [10 marks]