Question: 1.45 Rectification Using a Partially Va porized Feed. A total feed of 200mol/h having an overall composition of 42mol% heptane and 58mol% ethyl benzene is

1.45 Rectification Using a Partially Va porized Feed. A total feed of 200mol/h having an overall composition of 42mol% heptane and 58mol% ethyl benzene is to be fractionated at 101.3kPa pressure to give a distillate containing 97mol% heptane and a bottoms containing 1.1 mol% heptane. The feed enters the tower partially vaporized so that 40mol% is liquid and 60 mol% vapor. Equilibrium data are given in Problem 11.4-2. Calculate the following: a. Moles per hour distillate and bottoms. b. Minimum reflux ratio Rm. c. Minimum steps and theoretical trays at total reflux. d. Theoretical number of trays required for an operating reflux ratio of 2.5:1. Compare with the results of Problem 11.4-2, which uses a saturated liquid feed

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