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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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F. Problems Requiring Other Resources

F1.* A distillation column with two stages plus a partial reboiler and a partial condenser is separating benzene, toluene, and xylene. Feed rate is 100 kmol/h, and feed is a saturated vapor introduced on the bottom stage of the column. Feed compositions (mole fractions) are zB = 0.35, zT = 0.40, zX = 0.25. Reflux is a saturated liquid and p = 16 psia. A distillate flow rate of D = 30 kmol/h is desired. Assume Ki = VPi/p. Do not assume constant relative volatility, but do assume CMO. Use the matrix approach to solve mass balances and the bubble-point method for temperature convergence. For the first guess for temperature, assume that all stages are at the dew-point temperature of the feed. Do only one iteration. ...

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