At what value of reflux ratio, number of theoretical plates in a distillation column is minimum ?
Correct answer: B. ∞
- A. 0
- B. ∞
- C. 1
- D. < 1
Explanation
At total reflux, the entire overhead product is returned to the column, producing the maximum enriching effect per stage. Consequently, the theoretical-stage requirement reaches its minimum as the reflux ratio approaches infinity.
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