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If stages are fixed, then Reflux ratio

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If stages are fixed, then Reflux ratio

(a) Decreases

(b) Increases

(c) Equates to 0

(d) Approaches infinity.

The question was asked at a job interview.

Question is taken from Theoretical Stages in section Key Fractionation Concepts of Distillation Design

1 Answer

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Best answer
Correct choice is (b) Increases

Easy explanation: The stages and the reflux ratio are directly proportional, while when it approaches to 0 the distillate is not withdrawn and if infinite all feed is withdrawn.

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