Engineering, 06.04.2021 04:40 ashleymarina

A total feed of 200 mol/h having an overall composition of 42 mol % heptane and 58 mol % ethyl benzene is to be fractionated at 101.3 kPa pressure to give a distillate containing 97 mol % heptane and a bottoms containing 1.1 mol % heptane. The feed enters the tower partially vaporized so that 40 mol % is liquid and 60 mol % is vapor. Equilibrium data are given. Calculate the following: A) Moles per hour distillate and bottoms.
B) Minimum reflux ratio Rm.
C) Minimum steps (theoretical trays) at total reflux.
D) Theoretical number of trays required for an operating reflux ratio of 2.2:1.
E) The composition of the streams entering and leaving stage 2 and the composition of the streams entering and leaving the last stage in the column.
Temperature
K oC xH yH K oC xH yH
409,3 136.1 0 0 383.8 110.6 0.485 0.730
402.6 129.4 0.08 0.230 376.0 102.8 0.790 0.904
392.6 119.4 0.250 0.514 371.5 98.3 1.000 1.000

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A total feed of 200 mol/h having an overall composition of 42 mol % heptane and 58 mol % ethyl benze...

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