Question

What is pervaporation?

(a) Process to separate a volatile liquid from a non-volatile liquid

(b) Process to mix a volatile liquid from a non-volatile liquid

(c) Process to a evaporate a non-volatile liquid

(d) Process to separate water molecules from a non-volatile liquid

The question was posed to me in unit test.

My question is taken from Membrane Separators in section Contact Equilibrium Separation Process of Food Processing Unit Operations

Answer 1

Right choice is (a) Process to separate a volatile liquid from a non-volatile liquid

The best explanation: Pervaporation is a process to separate a volatile from a non-volatile liquid. The driving force is a vacuum on the gaseous side of the membrane. It is a tool for separation of liquid mixtures.