Distillation of Multicomponent Alcohol Mixture. A feed of 30 mol % methanol (A), 20% ethanol (B), 15% n-propanol (C), and 35% n-butanol (D) is distilled at 101.32 kPa abs pressure to give a distillate composition containing 95.0 mol % methanol and a residue composition containing 5.0% methanol and the other components as calculated. The feed is below the boiling point, so that q = 1.1. The operating reflux ratio is 3.0. Assume that Raoult's law applies and use vapor-pressure data from Problem 11.7-3. Calculate the following:

1. Composition and amounts of distillate and bottoms for a feed of 100 mol/h.
2. Top and bottom temperatures and number of stages at total reflux. (Also, calculate the distribution of the other components.)
3. Minimum reflux ratio, number of stages at R = 3.00, and feed-tray location.
4.  

Transcribed Image Text:

T(C) Methanol Ethanol Vapor Pressure (mm Hg) n-Propanol n-Butanol 565 50 415 220.0 88.9 33.7 60 629 351.5 148.9 59.2 65 767 438 190.1 77.7 70 929 542 240.6 99.6 75 1119 665 301.9 131.3 80 1339 812 376.0 165.0 85 1593 984 465 206.1 90 1884 1185 571 225.9 100 2598 1706 843 387.6 T(C) Methanol Ethanol Vapor Pressure (mm Hg) n-Propanol n-Butanol 565 50 415 220.0 88.9 33.7 60 629 351.5 148.9 59.2 65 767 438 190.1 77.7 70 929 542 240.6 99.6 75 1119 665 301.9 131.3 80 1339 812 376.0 165.0 85 1593 984 465 206.1 90 1884 1185 571 225.9 100 2598 1706 843 387.6

Answer rating: 100% (QA)

To solve this problem well use the McCabeThiele method for distillation column design Given the complexity of the calculation Ill provide the key step... View the full answer