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Problem D 20 (Chapter 4) A distillation column with a total condenser and a partial reboiler is separating ethanol and water at 1 kg/cm pressure. Feed is 0.32 mole fraction ethanol and is at 30C. Feed flow rate is 100 kmol/h. The distillate product is a saturated liquid, and the distillated is 80 mol% ethanol. The condenser removes 2,065,113 kcal/h. The bottom is 0.04 mole fraction ethanol. Assume CMO is valid. Find the number of stages and the optimum feed stage location. 1.0 EtOH 8 Azeotrope Data: CPL, Btoh = 24.65 cal/(mol.C) at 0C. X-y diagram is show The enthalpy-composition diagram is given in the next slide .6 YE 4 plam .2 6 o o 2. 4 .8 1.0 600 co 500 Dwie 00 400 for Interlingur COMME 400 Enthlo, KCUK 300 300 9.BE .FR 23 28. 725 NE 78 7265 22 28 000 200 Lootes Are G 100 100 Bow Rom RO Solu O -100 00 09 -100 Gyor OI 02 03 24 os 06 Concentration of Alcohol, Weight Fraction FIGURE 2-4 Enthalpy-composition diagram for ethanol water ar a pressure of Ike (Bamakowie Technische Thermodynamik, 7. Steinkopf Leipti 1935)