In a moderately sized packed absorption tower, channelling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter ?
Correct answer: C. > 8:1
- A. > 4 :1
- B. < 8 : 1
- C. > 8:1
- D. < 6:1
Explanation
Channelling is reduced when the tower is sufficiently wide relative to the packing, allowing liquid to redistribute instead of following wall or packing channels. A diameter-to-packing ratio greater than about 8:1 is the usual guideline.
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