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    Distillation and Reflux: Ponchon-Savarit Method

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    1000 kg/hr of a mixture containing 42 mole percent heptane and 58 mole percent ethyl benzene is to be fractionated to a distillate containing 97 mole percent heptane and a residue containing 99 mole percent ethyl benzene using a total condenser and feed at its saturated liquid condition. The enthalpy-concentration data for the heptane-ethyl benzene at 1 atm pressure are as follows:
    xheptane 0 0.08 0.18 0.25 0.49 0.65 0.79 0.91 1.0
    yheptane 0 0.28 0.43 0.51 0.73 0.83 0.90 0.96 1.0
    Hl (kJ/kmol) x 10-3 24.3 24.1 23.2 22.8 22.05 21.75 21.7 21.6 21.4
    Hv (kJ/kmol) x 10-3 61.2 59.6 58.5 58.1 56.5 55.2 54.4 53.8 53.3
    Calculate the following:
    a. Minimum reflux ratio
    b. Minimum number of stages at total reflux
    c. Number of stages at reflux ratio of 2.5
    d. Condenser duty
    e. Reboiler duty

    © BrainMass Inc. brainmass.com October 9, 2019, 3:31 pm ad1c9bdddf
    https://brainmass.com/engineering/molecular-engineering/distillation-and-reflux-ponchon-savarit-method-5987

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    Solution Summary

    In this problem,
    a. Minimum reflux ratio
    b. Minimum number of stages at total reflux
    c. Number of stages at reflux ratio of 2.5
    d. Condenser duty
    e. Reboiler duty
    have been calculated by using Ponchon-Savarit Method.

    The solution is detailed and well presented.

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