9459

Operation of a Rectifying Column

Consider a feed containing a binary mixture of compounds A and B with 45 mole % of the lighter component. This feed is a saturated vapor, which will be enriched in a rectifying column in order to obtain a distillate with 85 mole % purity. Enriching or rectifying columns are used when a pure bottom is not needed. This Demonstration displays the McCabe–Thiele graphical construction for user-set values of the reflux ratio, relative volatility, and maximum number of stages. The actual number of stages will be equal or less than the maximum number of stages value. You can easily see if the distillate specification has been reached or not. In addition, the composition of the liquid stream that exits at the bottom of the rectifying column is computed and given in the set-up figure.

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DETAILS

For more information, see:
P. C. Wankat, Equilibrium Staged Separations, Englewood Cliffs: Prentice Hall, 1988.
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