Problem 1: Principles of Unit Operations by Alan Foust

An existing distillation system equivalent to equivalent to eight equilibrium stages is to be used to separate a saturated liquid feed containing 40 mole percent ethanol and 60 mole percent water. The saturated liquid distillate is to have a composition of 80 mole percent ethanol and the saturated liquid bottoms, 10 mole percent ethanol. The system operates at 1 atm pressure with no heat loss at each stage.

(a) Determine the reboiler duty for this operation

(b) What is the percentage recovery of ethanol in the distillate?

Problem 2: Principles of Transport Processes and Separation Processes by Christie John Geankoplis

An equimolar liquid feed of benzene and toluene is being distilled to give a distillate composition and a bottoms composition of , calculate the following using graphical methods:

(a) Minimum Reflux Ratio

(b) Minimum number of theoretical plates at total reflux.