(i) Tetrahydrofuran, THF, (Normal boiling point 66C ), forms a homogeneous azeotrope with water. At atmospheric pressure, the conditions are: 0.82 mole fraction THF, 63.4C. The azeotropic composition is known to change appreciably with pressure. At 8 bar, it is 0.64 mole fraction THF. Design a pressure-swing process to separate a THF-water mixture containing 0.2 mole fraction THF to recover high purity THF. Provide a PFD, a marked-up McCabe-Thiele-style sketch, and a description to integrate these, explaining your answer. [10 Marks]