Chemical Engineering > GATE 2020 > Distillation
Equilibrium data for a binary mixture of E and F at two different pressures is shown in the figure.
It is desired to process a feed containing 80 mol% E and 20 mol % F, and obtain a product with a purity of 99.5 mol % E. A sequence of two distillation columns, one operating at pressure P1 and another at P2, is employed for this operation, as shown below.
Mole fraction of E in the distillate obtained from column 1 is 0.9. If the column pressures P1 and P2 are in kPa, which one of the following is correct?
A
P1=100, P2=20, and high purity E is recovered from the top of column 2
B
P1=100, P2=20, and high purity E is recovered from the bottom of column 2
C
P1=20, P2=100 and high purity E is recovered from the top of column 2
D
P1=20, P2=100 and high purity E is recovered from the bottom of column 2

Correct : d

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binary mixture distillation GATE Chemical Engineering 2020 distillation columns distillation process pressure distillation binary mixture separation distillate mole fraction chemical engineering gate distillation column pressures

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