A distillation column operating at total reflux is separating acetone and ethanol at \(1.0 \mathrm{~atm}\). The height of packing is \(2.0 \mathrm{~m}\). The column has a partial reboiler and a total condenser. The bottoms composition is \(\mathrm{x}=\) 0.10 , and distillate composition is 0.90 . Equilibrium data are in Problem 4.D7. Estimate the average value of \(\mathrm{H}_{\mathrm{OG}}\).

Problem 4.D7.

Transcribed Image Text:

D7.* A distillation column with a total condenser is separating a feed that is 30 mol% acetone from ethanol. Distillate XD = 0.90, and bottoms xg = 0.13, both mole fractions acetone. Assume CMO is valid. L/V = 0.8. Boilup ratio is v/B = 1.0. . Find the composition of the liquid leaving the fifth stage below the total condenser. . The column has a partial reboiler that acts as an equilibrium contact. Find the vapor composition leaving the second stage above the partial reboiler. . Find optimum feed plate location, total number of stages, and required q value of feed. Equilibrium data for acetone (A) and ethanol at 1 atm (Perry et al., 1963, pp. 13-4): XA O 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.50 0.60 0.70 0.80 0.90 1.0 YA O 0.262 0.348 0.417 0.478 0.524 0.566 0.605 0.674 0.739 0.802 0.865 0.929 1.0 58.0 57.0 56.1 TC 78.3 67.3 65.9 63.6 60.4 59.1