In an absorption column, NH3 is absorbed with water from the NH3 air mixture at 25 C and 101.3 kPa pressure. The water fed from the tower top contains 1% NH3 as mole percent. The flow rate of the NH3 air mixture fed from the tower base and containing 30% NH3 as mole percent is 800 kmol/h. The air leaving the column contains 2% NH3 as mole percent. Since the water leaving the tower at the end of the process is desired to contain 15% NH3 as a mole percent;

a) Find the percent recovery of NH3. b) Calculate how much the flow rate of the water sent from the top of the tower is more than the minimum amount. c) Derive the operating curve equation.

lem artlarnda sisteme ait denge deerleri (mol frak.)