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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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D. Problems

*Answers to problems with an asterisk are at the back of the book.

D1. A continuous, steady-state distillation column with a total condenser and a partial reboiler is separating methanol from water at one atmosphere (see Table 2-7 for data). The feed rate is 100 kmol/h. The feed is 55 mol% methanol and 45 mol% water. We desire a distillate product that is 90 mol% methanol and a bottoms product that is 5 mol% methanol. Assume CMO.

a. If the external reflux ratio L/D = 1.25 plot the top operating line.

b. If the boilup ratio Image/B = 2.0 plot the bottom operating line.

c. Step off stages starting at the bottom with the partial reboiler. Use ...

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