Question

Minimum number of trays

100 kmol/hr of a feed of 60% benzene and 40% heptane is to be separated by distillation. The distillate is to be 90% benzene and the bottoms 10% benzene. The feed enters the column as 30 mol% vapor. Use R 1.5 times the minimum. Assume a constant relative voltaility of (alpha) of 4 and that the pressure is constant throughout the column at 1atm.

Answer #1

A mixture of Mol-100 kmol containing 70% benzene and 30% toluene
must be separated at a total pressure of 101.325 KPA (1 atm). A
differential distillation column and an equilibrium(flash)
distillation column are available in the enterprise to perform this
operation. If 45 kmol distillate (top product) is obtained; a -)
the composition of the distillate and remaining liquid obtained by
differential distillation, B -) determine the composition of
distillate and liquid obtained from equilibrium distillation. What
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Distillation- McCabe-Thiele
A saturated vapor feed (pure vapor at the dew point) containing
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kmol/hr and a bottoms containing 5 mol% toluene. Use McCabe-Thiele
graphical method to answer the following questions:
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A distillation column has a feed of 100 kmol/h. The feed is 15
mol% heavy non-key, 35 mol% heavy key, and 50 mol% light key. The
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aLNK =3.5
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The feed stream to a distillation column is 40 mol-% n-pentane
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We wish to separate a mixture of 60 mol% ethanol and 40 mol%
n-propanol in a distillation column with a partial
reboiler and a total condenser. The feed rate is 1000 kmol/h, and
feed is a saturated vapour. We desire a distillate product of 99
mol% ethanol and a bottoms product that is 0.8 mol% ethanol. Reflux
is saturated liquid and CMO can be used. Equilibrium data can be
approximated with an average relative volatility of 2.1 (ethanol is
more...

1. The liquid product
from a flash distillation has a mole fraction of the more volatile
component that is lower than the specified liquid purity. Should we
decrease, increase, or hold constant the vapor molar flowrate to
meet the specified liquid purity? Draw a sketch and explain
why?
2. If the
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bottoms, reflux, and overhead vapor decrease, stay the same, or
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3)1000 kmol/h of feed with...

A saturated liquid feed at 1000.0 kmol/h that is 8.0 mol%
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n-pentane is fed to a distillation column operating at 5.0 atm. The
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A liq mixture of benzene-toluene is to be distilled in a
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enters at 327.6 K (130 ◦F). A distillate containing 95
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Rectification. McCabe-Thiele Method. A mixture of
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the boiling point with 60 mol % benzene and 40 mol % toluene. The
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mol % benzene. The reflux ratio is 3:1.
(a) Calculate the kg mol/h distillate: D=_______
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Separation Process:
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with a bottoms product mole fraction of 0.10. You may take the
relative volatility to be aBT = 2.49 at the temperature that the
column is operated. You are also given the reflux ratio to be 10.0,
assuming a total condenser....

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