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Industrial Chemical Process Analysis and Design by Mariano Martín Martín

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We assume that the flows of the species are approximately constant across each section of the column:

yn=LVxn.1+DVxD

image

ym=LVxm1+WVxW

image

The feed to the column is partially liquid. Thus we define the liquid and vapor fraction of the feed as ΦLimage and ΦV, respectively:

ΦL=LLFΦV=VVF

Thus the q line can be written as follows:

q=ΦV1ΦVxn.+1ΦVxf

We now ...

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