Which of the following is used to set the diameter of the distillation column ?
Correct answer: D. Allowable vapour velocity
- A. Number of theoretical plates
- B. Static submergence
- C. Length of straight rectangular weir on cross-flow tray
- D. Allowable vapour velocity
Explanation
Column diameter is governed by the vapour-handling capacity of the tower, so the allowable vapour velocity is used to determine its cross-sectional area. The number of plates determines height, not diameter.
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