Chapter 3: Column Distillation

Question 1

Describe the characteristics of the bubble flow regime.

Answer 1

• Low gas flowrate
• Low liquid
  flowrate
• Poor mix
• Undesirable

Question 2

Describe the characteristics of the foam flow regime?

Answer 2

Low gas flowrate
* Stable foam
* Good surf. area
* Can lead to
entrainment or
flooding
* Undesirable

Question 3

Describe the characteristics of the froth flow regime

Answer 3

Good gas
flowrate
* Continuous liquid
phase
* Pulsing vapour
void
* Good surf. area

Question 4

Describe the characteristics of the spray flow regime?

Answer 4

High gas flowrate
* Continuous
vapour phase
* Liquid is poorly
mixed
* Poor mass
transfer