Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in ______________ tower?
Correct answer: C. Wetted wall
- A. Perforated tray
- B. Bubble cap
- C. Wetted wall
- D. Packed
Explanation
A wetted-wall tower has only a thin liquid film and no trays, packing, or bubbling resistance, so its gas-side pressure drop is the lowest among these devices.
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