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Consider the distillation of a saturated liquid feed of 0.16 mol fraction methanol and 0.84 mol...

Consider the distillation of a saturated liquid feed of 0.16 mol fraction methanol and 0.84 mol fraction water. The column has a side stream of composition 0.5 mol fraction methanol and a flow rate of 7.7% of the feed rate. The top product is to contain 0.77 mol fraction methanol and the bottom product is to contain 0.02 mol fraction methanol. The column operates at 1 atm, and the usual simplifying assumptions can be made. The external reflux ratio is 2.5 times the minimum. A total condenser and a partial reboiler is used. Compute the number of ideal plates and the plate from which the side stream is to be drawn.

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