With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the ______________________ decreases?
Correct answer: A. Fixed charges initially
- A. Fixed charges initially
- B. Running cost of cooling water for condenser
- C. Vapour & liquid load both
- D. Running cost of steam for reboiler
Explanation
Increasing reflux reduces the number of theoretical stages needed for a fixed separation, so the required column height and fixed cost initially decrease. However, the larger vapour and liquid loads increase condenser and reboiler duties, raising running costs.
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