Example Multicomponent Distillation With Shortcut Methods

EXAMPLE MULTICOMPONENT DISTILLATION WITH SHORTCUT METHODS 

you specify the split you would like. To do this, you need the concept of a light key and heavy key. First, line the chemicals up in order of their boiling points, from low to high. (Note This illustration assumes that the thermodynamics are ideal, so Raoult s law applies.) Because you are using distillation, if most of the propane is to go out in the top stream, a little of the /-butane will, too very small fractions of the other species will go out in the top stream. You want most of the /-butane to go out of the bottom. Thus, you draw a line between propane and /-butane in Table 6.1. The component above the line is the light key and the component below the line is the heavy key. The distillation column is based on those two components, and the other components are split according to thennodynamics. 

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EXAMPLE MULTICOMPONENT DISTILLATION WITH SHORTCUT METHODS... 

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