An equimolar saturated liquid-saturated vapor mixture containing 35% A, 65% B in moles at a flow rate of 100 kmol/h will be separated by distillation. It is desired that 93% of A is present in the top product and 96% of the A entering the column is in the top product. If the reflux ratio in the column is 4 and the relative volatility a-2, determine the given

below:

a) Theoretical number of plates and feed plate

b) Top and bottom product flow rates

c) Minimum reflux ratio

d) Minimum number of plates