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- 4. A packed tower has been designed to strip component A from an aqueous stream into a counter-flowing air stream. At a given plane in the tower, the concentrations of the two adjacent streams are PAG 4 x 103 Pa and CAL 4 kg mol/m3 of solution. Under the given flow conditions, the overall gas mass-transfer coefficient, Kg, is equal to 2.46 x 108 kg mol/m?.s.Pa and 60% of the resistance to mass transfer is encountered in the gas phase. At the tower's operating condition of 290 K and 1.013 10% Pa, the system satisfies Henry's law with a Henry's law constant of 1400 Pa/(kg mol/m?). (a) Find the individual gas-film coefficient, kg. (5%) (b) Derive a relation between the overall gas mass-transfer coefficient (KG) and the individual phase coefficients, ko and kl, where k is the individual liquid-film coefficient. (5%) (c) Find k. (2%) (d) Determine the overall liquid mass-transfer coefficient, Kl. (5%) (e) Calculate both the interfacial gas and liquid concentration. (8%) M s l