q 5 : A gas stream contains 4.0 mol % NH3 and its ammonia content is reduced to 0.5 mol% in a packed absorption tower at 293 K and 1.013x105 Pa. The inlet pure water flow is 0.68 kg mol/h and the total inlet gas flow is 68 kg mol/h. The tower diameter is 0.747m. The film mass-transfer coefficient KYa = 0.0739 kg mol/s m3 mol frac and KXa = 0.169 kg mol/s m3 mol frac. Using the design methods for dilute gas mixture, do as follows. Calculate the tower height using KYa .

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