(TOTAL MARKS = 50) Time: 1.5hr 1. A distillation column is separating ethanol and acetone. The column is at a pressure of 1.0 atm. The column has a total condenser and a partial reboiler. Feed 1 flow rate is 80kmol/h and it is a saturated liquid of 70 mol% acetone. Feed 2 flow rate is 100 kmol/h, a two-phase mixture of 60% vapour and 30 mol% acetone. The distillate is 90 mol% acetone and the bottom is 10 mol% acetone. The reflux is a saturated liquid. Boilup ratio is == 2.0 Assume CMO. Equilibrium data are in Table 1. a. Find the flow rates of distillate and bottom. (6 marks) b. Determine and plot the operating lines (top, bottom, middle, 2 feeds) (39 marks) c. Find both optimum feed locations and the total number of equilibrium stages needed. Step off stages from the up bottom. (5 marks) Note: Feed 1 of higher mole fraction acetone enters the column higher up than Feed 2. Table 1: Equilibrium data for acetone-ethanol at 1 atm XA 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.50 0.60 0.70 0.80 0.90 YA 0.262 0.348 0.417 0.478 0.524 0.566 0.605 0.674 0.739 0.802 0.865 0.929