Chemical Engineering - Mass Transfer - Discussion

Discussion Forum : Mass Transfer - Section 2 (Q.No. 21)
21.
In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of
area between operating line and 45° diagonal x-y diagram.
condenser and reboiler surfaces.
tower cross-section.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Anoms said:   9 years ago
The rays are not drawn between operating line & diagonal but drawn between operating line & equilibrium curve.

As recycle ratio (L/D) increases, slop of enriching section will increases which drives off upper operating line far away from diagonal which results in an increase in area between both the line.

M Nezar said:   9 years ago
It's wrong choose. If reflux ratio increace, then the tray will be decrease. So the area between operating and diagonal lines increases.

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