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The Ratio of optimum feed stages to total number of stages is

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The Ratio of optimum feed stages to total number of stages is

(a) Dependent on number of stages

(b) Independent of number of stages

(c) Independent of total stage

(d) Inversely proportional.

This question was posed to me in examination.

This question is from Minimum Reflux in chapter Column Process Design, Optimization and Shortcut Calculations of Distillation Design

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Right answer is (b) Independent of number of stages

The explanation is: This is mathematically explained as Fenske’s equation, which also involves relative volatility of the components.

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