Ammonia is to be absorbed from air at 25°C and 1 atm pressure in a co-current packed tower using ammonia free water as the absorbent at 25°C. An inlet gas rate of 4 kmol/hr will be used. The ammonia concentration is reduced from 3.52% to 1.29 % by volume. The equilibrium data at 25°C and 1 atm pressure is as follows: X, (mol NH₂/mol H₂O) 0 Y, (mol NH₂ /mol inert gas 0 0.0164 0.0252 0.0210 0.0320 Determine the following using graphical method: (i) The (Q/QG)min (ii) Actual water rate if water rate is 1.37 times the minimum. (iii) Concentration of exiting aqueous stream. 0.0349 0.0455 0.0420 0.0530 0.0722 0.0800

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