Engineering, 18.02.2020 05:14, gafran

A distillation column is separating phenol from p-cresol at 1.0 atm pressure. Distillate composition is 0.96 mol fraction phenol. An external reflux ratio of L/D = 4 is used, and the reflux is returned to the column as a saturated liquid. The equilibrium data can be represented by a constant relative volatility, αphenol−cresol = 1.76 (Perry et al., 1963, pp. 13–3). CMO can be assumed. The feed is on stage 8. a) What is the vapor mole fraction of phenol leaving the third equilibrium stage below the total condenser? Solve this problem using an analytical stage-by-stage calculation alternating between the operating equation and the equilibrium equation (Lewis method). b) What is the liquid mole fraction of phenol leaving the sixth equilibrium stage below the total condenser?

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A distillation column is separating phenol from p-cresol at 1.0 atm pressure. Distillate composition...