Use a vapor flow rate that is nominally 75% of flooding. We wish to repeat Example 4-3 (distillation of ethanol and water) except that a column packed withĢ-inch metal Pall rings will be used. Equilibrium data for acetone and ethanol at 1 atm Stages, and required q value of the feed. If the feed composition is z = 0.3 (all concentrations are moleįraction of more volatile component), find the optimum feed plate location, total number of The distillation column in parts a and b is separating acetone from ethanol and has xD = 0.9, xB If the bottoms composition is xB = 0.13 mole fraction acetone and theīoilup ratio /B = 1.0, find the vapor composition leaving the second stage above the partialĬ. A distillation column separating acetone and ethanol has a partial reboiler that acts as anĮquilibrium contact. If L/V is equal to 0.8, find the composition of the liquid leaving the fifth stage belowī. A distillateĬoncentration of xD = 0.90 mole fraction acetone is desired. A distillation column with a total condenser is separating acetone from ethanol. If F = 50 mol/h, z = 0.8, p = 1 atm, and ym = 0.892 mole fraction methanol, find V, L, and xm.Ī. If z = 0.4, p = 1 atm, and Tdrum = 77☌, find V/F, xm, and ym. What must the flow rate and composition of the feed be?į. We are operating the flash drum so that the liquid mole fraction is 45 mol% methanol. V/F must be used? For a feed rate of 1000 lbmol/h, find product flow rates and compositions.ĭ. If the feed is 30 mol% methanol and we desire a liquid product that is 20 mol% methanol, what Mole fractions and flow rates? Feed rate is 100 kmol/h.Ĭ. Feed is 60 mol% methanol, and 40% of the feed is vaporized. We are separating a mixture of methanol and water in a flash drum at 1 atm pressure. HowĬan you get the composition from P and T? Setting the pressure and temperature also specifies the equilibrium composition. This part is sort of backwards (feed composition is not specified).
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Which variables have been specified, and how doesĭ. Which two variables (besides the feedĬomposition) have been specified? The drum just separates the vapor from the liquid.Ĭ. The other comments/questions are to help you.Ī.