An absorber is being used by an industrial company as a gas scrubber. A dilute air-ammonia mixture, containing 5.0 mol% NH3 is drawn through the tower countercurrent to an initially ammonia free water stream. The inlet gas stream rate is 136 mol/m2.s and the inlet NH3 -free water rate is 3.4 kg/m2.s. At the temperature and pressure of the absorber, the equilibrium concentrations are related by
yNH3 = 1.075 xNH3
If the exiting gas stream is to contain only 0.2 mol % ammonia, determine
a. the composition of the exiting liquid stream;
b. the ratio of the actual Ls/Gs is larger than the minimum Ls/Gs.
c. the composition of the liquid stream flowing by the gas stream when the gas mixture contains 2.0 mol % ammonia.