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Question 4 a . Explain the difference in the location of the operating line in relation to the equilibrium line depending on whether there is
Question
a Explain the difference in the location of the operating line in relation to the
equilibrium line depending on whether there is stripping or absorption for dilute
systems marks
b A packed column with six equilibrium stages is used for stripping benzene from a
liquid stream using countercurrent air at atm and The inlet liquid stream
contains mol benzene, and the inlet air is free of benzene. The liquid flow
rate is and the gas flow rate is The density of air at
and atm is the molar mass of air is and that of the liquid
stream is The equilibrium relationship for benzene can be described by
the following relationship: Calculate the concentration of the benzene
in the exit stream. marks
c Derive the operating equation for an absorption process where the inlet gas and
the outlet liquid are concentrated in the solute. The final equation must be a
function of the outlet gas and inlet solvent parameters. State all relevant
assumptions and describe all symbols you use. marks
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