A distillation column operating at 1 atm is to be designed for separating an ethanol-water mixture. The feed is 20 mole

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A Distillation Column Operating At 1 Atm Is To Be Designed For Separating An Ethanol Water Mixture The Feed Is 20 Mole 1 (55.54 KiB) Viewed 10 times

A distillation column operating at 1 atm is to be designed for separating an ethanol-water mixture. The feed is 20 mole % ethanol and the feed flow rate is 1000 kg-mole/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: (a) the total number of equilibrium stages required (b) the optimum feed plate location (c) the distillate and bottoms flow rates in kg-mole/hr Equilibrium data for ethanol-water system at 1 atm pressure are in Table given below: CAYDREDUFA e 100 185 90 107 953 TW.1 112.7 123 815 30.7 7911 197 7931 704 701 Molo percent etanol in liquid 0.00 1.10 7:21 9.60 12:30 1651 23.37 210.00 3273 1975 50 79 51.98 57 32 67.63 74 1043 Mols percont ethanol in vapour 0:00 17.00 38.01 4316 47.09 50 890 6445 65.60 3820 01/22 6504 6550 08:41 73.85 70.15 10:43 Analyse the graphical solution. What can you conclude about the extent of separation in the rectifying section and stripping section respectively? Obtain the mole fractions in liquid and vapour for each tray and plot a concentration profile for your design (vertical-axis: number of trays, top-down, horizontal-axis: mole fractions x and y).