The gas stream from a chemical reactor contains 25 mol% ammonia and the rest inert gases. The total flow is181.4 kg mol/h to an absorption tower at 303 K and 101.3 kPa pressure, where water containing 0.005 mol fracammonia is the scrubbing liquid. The outlet gas concentration is to be 2.0 mol% ammonia. Sketch this process showing the inlet and outlet streams and the associated variables clearly.
What is the minimum flow L'min ? Using 1.5 times the minimum, determine the outlet liquid concentration, plot the equilibrium and operating lines, and determine the number of theoretical stages required.