With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency____________________?
Correct answer: D. Increases
- A. May increase or decrease; depends on individual design
- B. Decreases
- C. Remain same
- D. Increases
Explanation
Bubble-cap trays retain their liquid seal at reduced vapour rates, while lower throughput reduces entrainment and can improve tray efficiency. This behaviour gives bubble-cap columns good turndown performance compared with sieve trays.
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