Question 2: A continuous fractionating column, operating at atmospheric pressure, is to be designed to separate a mixture containing 30 per cent CS2 and 70 per cent CCl4 into a top product containing 91 per cent CS2 and a bottom product of 97 per cent CCl4, all by mol. An actual reflux 3 kmol/kmol of product may be assumed. Determine the number of plates required and the optimum feed location if The feed enters as a mixture of vapor and liquid , where 60 is vapor. The vapor liquid equilibrium data is as follows: Liquid , mole % 0 2.96 6.15 11.06 14.35 25.85 39.0 53.18 66.30 75.75 86.04 100.00 Vapor, mole % 0. 8.23 15.55 26.6 33.2 49.5 63.4 74.7 82.9 87.8 93.2 100.00