General characteristics of pervaporation:

• Uses semi-permeable membrane
• Permeate leaves membrane in vapor state
• Permeate must be volatile at operating condition
• Functions irrespective of vapor/liquid equlibrium
• Used to purify volatile chemicals
• Permeates water and methanol
• Separates mixtures that form azeotropes
• Replaces traditional separation methods
• Low energy consumption
• No entrainer required, no contamination