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[hafoosi]

Q1)
The top product, P, from a pressure distillation column is taken off as vapour.
The vapour composition and vapour-liquid equilibria data
at two different temperatures are given in Table Q1.

(a) Stating clearly any assumptions used regarding the streams leaving the
reflux drum, calculate the composition of the liquid reflux, L.

( Calculate the composition of the liquid leaving the top plate of the column
for a reflux ratio, L/P, of 3.0.

© Outline the information that you would require and indicate the expected
operating conditions for the design of a column separating such a mixture


Component

Mole fraction in
product P

Equilibrium Constant
at T = 340K

Equilibrium Constant
at T = 350K

n - propane
0.50
2.33

2.67
n - butane

0.45
0.79
1.18
n - pentane

0.05
0.23
0.40

[siretb]

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