Four hundred and fifty lbmol/h (204 kmol/h) of a mixture of 60 mol%benzene (LK) and 40 mol% toluene (HK) is to be separated into a liquid distillate and a liquid bottoms product of 95 mol% and 5 mol% benzene, respectively. The feed enters the column with a molar percent vaporization equal to the distillate-to-feed ratio. Use the McCabe–Thiele method to compute, at 1 atm (101.3 kPa): (a) Nmin, (b) Rmin, and (c) number of equilibrium stages N, for R/Rmin = 1:3, and the optimal feed-stage location. Also, compare the results with those from a process simulator.

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