Back-trapping in a distillation column ?
Correct answer: B. Decreases tray efficiency
- A. Increases tray efficiency
- B. Decreases tray efficiency
- C. Reduces pressure drop
- D. Is desirable, as it provides improved vapour-liquid contact
Explanation
Back-trapping causes liquid or vapour to move undesirably back to a preceding tray, increasing mixing and reducing the effective driving force for mass transfer. The result is lower tray efficiency, not improved contact.
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