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Category > Applied Sciences Posted 05 May 2017 My Price 8.00

A saturated liquid solution

  1. A saturated liquid solution of 40 mol% acetone and 60 mol% acetic acid is fed at a rate of 100 lb mol/hr to a distillation column. The desired separation of acetone is a 96 mol% distillate concentration and a 5 mol% bottoms concentration. The column is operated at 1.6 times the minimum reflux ratio, so R D ¼ 0.44. The average column

temperature is 95 °C and the average liquid density is 0.95 g/cm 3 . The liquid depth on

a tray is 1.5 cm, and the tower diameter is 30 cm. The mass transfer coefficients are k G a

¼ 505 sec -1 and k L a ¼ 1.8 sec –1 . Equilibrium data for acetone and acetic acid are

 

 

x (acetone)

y (acetone)

0.0

0.0

0.05

0.162

0.10

0.306

0.20

0.557

0.30

0.725

0.40

0.840

0.50

0.912

0.60

0.947

0.70

0.969

0.80

0.984

0.90

0.993

1.00

1.000

 

 

Determine the Murphree efficiency from Eq. 13.4-7, and then find the number of stages and the feed tray location for this column. (D. McCullum).

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IT KING
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Status NEW Posted 05 May 2017 01:05 PM My Price 8.00

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