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

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8.5.1 Distillation Curves

You may have noticed in Chapter 2 that enthalpy-composition and temperature-composition diagrams contain more information than the McCabe-Thiele y-x diagram. We started using the diagram with less information because it was easier to show the patterns and visualize the separation. For ternary distillation we will repeat this pattern and go to a ternary composition diagram that shows the paths taken by liquid mole fracs throughout a distillation operation. We gain in visualization power since a variety of possible paths are easy to illustrate, but we lose power since the stages are no longer shown. For complex systems the gains are much more important than the losses.

A distillation curve is a plot of the mole fracs on ...

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