In the Stripping section of the fractionation

distillation column; a liquid mixture of benzene-

toluene is to be distilled in a flash distillation

tower at 101.3 kPa pressure. The feed of 100 kg

mol/h is liquid and it contains 45 mol % benzene

and 55 mol % toluene and enters at 54 C. A

distillate containing 95 mol % benzene and 5 mol

% toluene. The reflux ratio is 4: 1. The average

heat capacity of the feed is 140 kJ/kg mol. K and

the average latent heat 20000 kJ/kg mol.

The slope of the q-line equation is 8.3

The bottoms containing 10 mol % benzene and 58 kg mol/h are liquid?

1.Calculate the amount of the liquid before the boiler and the returned vapor to the distilbation column from the boiler.

2.Calculate the number of sheoretical trays in Stripping section. Calculate the value of q?