Chapter 7: Applications of Ionic Liquid-based Materials in Membrane-based Gas Separation

Ionic liquid (IL) has gained attention in the development of highly permeable and selective gas separation membranes due to its unique physicochemical properties. The many possible combinations of cations and anions, chemical structures and immobilization techniques make IL a promising candidate to overcome the current problems in gas separation membranes. This chapter reviews the physicochemical properties and classification of IL followed by different configurations of ionic liquid-based gas separation membranes and their gas separation performance. Finally, a perspective is provided to help address the current challenges of applying IL as a practical material in preparing gas separation membranes.