mass transfer

QUESTION I: (15 marks) It is desired to absorb 90% of the acetone in a gas containing 1.0 mol % acetone in air in a countercurrent stage tower. The total inlet gas flow to the tower is 30.0 kg mol/h, and the total inlet pure water flow to be used to absorb the acetone is 108 kg mol H20/h. The process is to operate isothermally at 300 K and a total pressure of 101.3 kPa. The equilibrium relation for acetone (A) in the gas liquid is ya = 2.53xA. Determine the following: (1) Number of theoretical stages required for this separation by graphical method. (ii) Theoretical number of stages required using the analytical Kremser equation: N= en Ypal mxo (1-6)* ] YN+ Y, In A ( + where Varoke Astre A top Lo m Vi Aktm LN mv Nt