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Mass transfer

An ethanol-water mixture containing 35% mol% ethanol will be refluxed in a distillation tower. The top product (distillate) will contain 70 mol% ethanol and the base product will contain 2% ethanol. At the reflux rate, R=1 and the feed boiling point, it enters as a saturated liquid. Using the balance data table below, find the theoretical number of steps and optimum feed rack position. 

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Answer #1

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the feed tray is 3rd tray

the number of trays is 4

y intercept is xD/R+1

xF is 0.35

xD is 0.7

xW is 0.02


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