Question

Which type of columns are used for liquid dispersion in a continuous gas phase?

(a) Packed

(b) Bubble cap

(c) Sieve – plate

(d) Fluidized bed

I have been asked this question during an interview.

My question is taken from Convective Mass Transfer topic in portion Mass Transfer of Bioprocess Engineering

Answer 1

Correct answer is (a) Packed

To elaborate: Packed Beds. Although packed bed columns are used most often for absorption, they are also used for the distillation of vapor-liquid mixtures. The packing provides a large surface area for vapor-liquid contact, which increases the column’s effectiveness.