D9. We are separating acetone and ethanol in a distillation column with a total condenser and a partial reboiler. Tho column has two feeds and operates at a pressure of 1,0 atm. Feed 1 is a saturated liquid that is 60.0 mol% acetone and has a feed rate of Fil = 200.0 kmol/h. The second feed is 40.0 mol% acetone, has a feed rate of F2 = 300.0 kmol/h, and is a two-phase mixture that is 20% vapor. Assume CMO is valid. Bottoms product is 10.0 mol% acetone, and distillate product, is 80.0 mol% acetone.

a. External rollux ratio L/D = 2.0. Find the number of stages required, the optimum feed stage locations, and the boilup ratio V / B.

b. Find the minimum external reflux ratio (L/D) min for part a.

c. If feed 2 is changed to n superheated vapor that forces 1.0 mole of liquid to vapor-ire at the foed stage to cool every 5.0 moles of feed 2 to a saturated vapor, find (L/D) Imin Hint: The answer is not the same as in part b.