A saturated liquid feed containing 38 mol% ethanol in water is to be separated in a distillation column operating at 1 atm. The goal distillate composition is 72 mol% and the bottoms composition is 2 mol% (mol%s are ethanol). The reflux ratio for the column is to be 1.1. Equilibrium data is in the excel spreadsheet for an ethanol-water system at 1 atm.

a) Determine the outlet flow rates of the distillate and the bottoms stream and the required number of stages for this separation. What is the boilup ratio at the bottom of the column?

b) Plot the feed line if the feed was at 40oC. (not saturated liquid as the original problem statement)

c) Plot the feed line if the feed was at 130oC. (not saturated liquid as the original problem statement)

Physical data for feed: CpL = 0.18 kJ/mol-oC

CpV = 0.09 kJ/mol-oC

DHvap = 38 kJ/mol