Question

5) A filled column operating at 1 atm was used to absorb A from a gas...

5) A filled column operating at 1 atm was used to absorb A from a gas mixture with solvent B. At one point in the column the molar fraction of A in the gas is 0.20 and the liquid in contact has a molar concentration of A equal to 1.5x10-3gmol/m3. The individual mass transfer coefficient for the phase gas is worth 0.45 gmol / sm2atm. Experimental balance studies between phases indicate the following equilibrium relationship: PA = 20CA with PA in atm and CA in gmol / m3. If the molar flow transferred between the phases at this point in the column is 0.05 gmol / m2s, determine:
a) the partial pressure of A at the interface from the gas side;
b) the molar concentration of A at the interface from the liquid side;
c) the value of the global coefficient KL;
d) the value of the global KG coefficient;
e) the value of the individual coefficient for the liquid phase, kL;
f) the percentage of resistance associated with transport in the gas phase.

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