.5-6. Absorption of Ammonia in a Packed Tower. A gas stream contains 4.0mol%NH3 and its ammonia content is reduced to 0.5 mol% in a packed absorption tower at 293K and 1.013105Pa. The inlet pure-water flow is 68.0kgmol/h and the total inlet gas flow is 57.8kgmol/h. The tower diameter is 0.747m. The film mass-transfer coefficients are kyaa=0.0739kgmol/sm3mol frac and kxamol/sm3mol frac. Using the design methods for dilute gas mixtures, do as follows: a. Calculate the tower height using ka. b. Calculate the tower height using Kya. Ans. (a) z=2.362m(7.75ft)