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Problem # 4 ( Problem solved by: A distillation column composed of theoretical plates is used to separate a benzene - toluene mixture. The feed

Problem #4(Problem solved by:
A distillation column composed of theoretical plates is used to separate a benzene-toluene mixture. The
feed is 500molh introduced as saturated liquid and contains 40mol% benzene. During a run, liquid and
vapor samples of streams leaving a stage in the rectifying section are taken, and the analyses are
y=0.63 mole fraction benzene
x=0.51 mole fraction benzene
The total condenser produces a stream of 96%mol benzene, and the thermosyphon reboiler produces a liquid (bootom) stream with 5mol%benzene. The quilibirum curve for the benzene follows the equation: y=x(2.05-x)
(a) At what reflux ratio is the column operating?
(b) Determine the distillate and bottoms flow rates.
(c) Determine the number of theoretical stages needed and feed plate location.
(d) What is the ratio of reflux ratio (under operating conditions) to that under minimum reflux condition.
In other words what is (R)/(R_(m))?
(e) Estimate the condenser heat duty.
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