3. If It is desired to strip 30 mol % of B from water into air. Outlet flowrate of air stream is 90kgmol/hr. Inlet composition of B in air is 0.01mole% . Initially water with 18 mole % enters the multistage stripping process with a flow rate of 30kgmol/hr. BECAREFUL IT IS A STRIPPING PROCESS NOT AN ABSORPTION PROCESS! YB=2.5XB

a) Determine the # of theoretical stages by graphical approach

b) Determine # of theoretical stages by Kremser equation

c) If the tray efficiency is 50% what is the actual number of stages?

d) Determine the maximum air stream flowrate and compare it with the value in the question.