A heavy-oil stream at \(320 \mathrm{~K}\) is used in an absorber to remove dilute quantities of pollutant A from an air stream. The heavy oil is then recycled back to the process where A is stripped. The process is being run on a pilot plant basis, and information for scale-up is desired. The current absorber is a 16-plate sieve-tray column. Pilot plant data are as follows:

Liquid flow rate \(=5.0 \mathrm{~mol} / \mathrm{h}\)

Gas flow rate \(=2.5 \mathrm{~mol} / \mathrm{h}\)

Equilibrium for A is given as \(y_{A, i}=0.7 x_{A, i}\). Find the overall column efficiency, and the Murphree plate efficiency. Assume that the liquid and gas flow rates are roughly constant.

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YA,in = 0.04 YA,out = 0.0001 XA,in = = 0.0001