Q.2 (6.0 Marks) A binary liquid mixture of 40 mol % Benzene (1) and 60 mol % Toluene (2) is flowing at 100.0 kmol/h, 1 atm, and at its bubble-point temperature. It is to be separated into two liquid streams by use of a distillation tower. The overhead product stream is CMET402 Assignment#2 (2. 2021-2022) Abdel-Karim Mahgoub Page 1 0.98 mole fraction benzene and the bottoms is 0.98 mole fraction Toluene. A total condenser (with no subcooling of the liquid) and a partial reboiler are to be used. Reflux is returned as saturated liquid at a reflux ratio of 3.5. a. Assume CMO, negligible pressure drop, and no heat losses from the column. Find the overhead (D) and bottoms (B) flow rates. b. Find liquid and vapour flow rates in the rectification section (L & V) c. Write the operating equations for the enriching and stripping sections and the feed-line equation d. Determine the equilibrium number of stages using McCabe-Thiele method What is the actual number of stages if stage efficiency is 35 %? e. Find the optimum feed plate location. f. If the feed is 40 % vapour, write the feed-line equation? 1.0 0.9 0.8 S0.7 0.5 0.4 03 0.1 0.0 0.0 0.1 0.9 1.0 0.2 0.3 0.4 0.5 0.6 0.7 0.8 * (mole fraction benzene in liquid)