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Question: answer the following two flash distillation columns are connected together...

Question details


3. Given the vapor-liquid equilibrium data in the table below, Methanol liquid Methanol vapour Temperature (mol% 0 (mol%) 0 13.4 23 30.4 36.5 41.8 51.7 57.9 66.5 72.9 77.9 82.5 87 91.5 95.8 97.9 100 (o C) 100 96.4 93.5 91.2 89.3 87.7 84.4 81.7 78 75.3 73.1 71.2 69.3 67.6 4 8 10 15 20 30 40 50 60 70 80 90 95 100 65 64.5

Answer the following:

Two flash distillation columns are connected together as shown in the following diagram. Both are at 1 atm. The feed to the first drum is a binary mixture of methanol and water of

55 mol% MeOH. Feed flow rate is 10,000 kmol/h. The second flash column operates with V/F= 0.7 , and the liquid product composition is 25 mol% MeOH. Determine the fraction vaporized in the first column, and the values y1, y2, x1, T1, and T2

Vi Feed = 10,000 kmol/h Zr = 0.55 Column 2 Column 1 L2, X2 = 0.25 Li

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