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Unformatted text preview: . See the McCabe-Thiele construction on the next page, where it is seen that slightly more than 10 stages + a partial reboiler acting as an equilibrium stage are required. The top 5 stages are in the rectifying section. Analysis: (b) (continued) Exercise 7.13 (continued)
McCabe-Thiele Diagram Exercise 7.14
Subject: Distillation of a mixture of benzene and chlorobenzene with specified number of equilibrium stages, boilup ratio, and reflux ratio. Given: Feed is a saturated liquid of 54.5 mol% benzene. Column contains two equilibrium plates with feed to the bottom plate. Column is equipped with total condenser and partial reboiler. Boilup is V/F = 0.855. Reflux ratio, L/V = 0.5. Vapor-liquid equilibrium data given. Find: Compositions of distillate and bottoms, assuming constant molar overflow. Analysis: Take as a basis, F = 100 mol/s. Therefore, vapor generated in reboiler = 0.855(100) = 85.5 mol/s. Since the feed is a saturated liquid, this vapor rate continues up the column to the condenser. L/V = 0.5, wh...
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