+1 vote
in Mass Transfer by (37.1k points)
Estimate the feed rate, if the composition of the more volatile component in the feed is 50% and the residue is 10% and the equilibrium relation is given by y*= 1.975x. Also, the rate of residue is 60 mol/hr.

(a) 213 mol/hr

(b) 313 mol/hr

(c) 413 mol/hr

(d) 513 mol/hr

The question was asked in an international level competition.

This interesting question is from Distillation-Differential Distillation topic in division Distillation of Mass Transfer

1 Answer

0 votes
by (39.8k points)
The correct choice is (b) 313 mol/hr

Explanation: Using Rayleigh equation, we can estimate

                        ln (F/W)= 1.657

                        F= 313 mol/hr.

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