2 A distillation column operating at 1 atm is to be designed for separating an ethanol- water mixture. The feed contains 20 mole% ethanol and the feed flow rate is 1000 kmole/hr of saturated liquid. A distillate composition of 80 mole% ethanol and a bottoms composition of not more than 2 mole% ethanol are desired. The reflux ratio is 5/3. Determine the following: (a) (b) (c) the total number of equilibrium stages required. the optimum feed plate location. the distillate and bottoms flow rates in kg-mole/hr. The equilibrium data for ethanol-water system at 1 atm pressure are given in the following Table. The enclosed graph paper on page 6 can be used to construct your diagram. Temperature, °C Mole percent ethanol in Mole percent ethanol in liquid vapour 100 0.00 0.00 95.5 1.90 17.0 89.0 7.21 38.91 86.7 9.66 43.75 85.3 12.38 47.04 84.1 16.61 50.89 82.7 23.37 54.45 82.3 26.08 55.80 81.5 32.73 58.26 80.7 39.65 61.22 79.8 50.79 65.64 79.7 51.98 65.99 79.3 57.32 68.41 78.7 67.63 73.85 78.4 74.72 78.15 78.1 89.43 89.43 [100%]