As a new chemical engineer working in a petrochemical company, you are asked to design two flash distillation drums in series for a mixture of A and B, A being the more volatile component.

The feed to the first drum is a mixture of 55 mol% A and 45 mol% B and is heated to a temperature that will cause 40% of the feed to flash. Average relative volatility of this ideal system is 2.25. Using a graphical method find the compositions ot liquid and vapour leaving the flash drum.

b)

The outlet liquid from the first drum is fed to the second drum at a temperature that again flash off 40% of the feed. What are the compositions of liquid and vapour leaving the flash drum?

C)

If the initial feed to the first flash drum is 100 mol, find the amount of liquid and vapour leaving each drum.