Question

What is channeling in gas absorption?

(a) Down in the bed, the liquid tends to flow toward the wall

(b) At the top of the bed, the liquid tends to flow toward the wall

(c) Down in the bed, the liquid tends to flow away from the wall

(d) At the top of the bed, the liquid tends to flow away from the wall

I got this question by my college professor while I was bunking the class.

This intriguing question comes from Absorption Equipments in section Absorption of Food Processing Unit Operations

Answer 1

Correct answer is (a) Down in the bed, the liquid tends to flow toward the wall

Easiest explanation: Down in the bed, the liquid tends to flow toward the wall. This condition is called as channeling. These occur in perforated trays or rely only on gas pressure to hold liquid on the tray, whereby the liquid outflows through the sieves at low gas rates.