Study on immobilized liquid membrane using ionic liquid and PVDF hollow fiber as a support for CO2/N2 separation

► Optimization of improving flux and stability of the liquid membrane is studied. ► PVDF hollow fibers with high effective area per unit volume are applied to support. ► High CO2 permeability of 3,000 Barrer with CO2/N2 selectivity of 33 is observed. ► The pressure effect increasing up to 1.5 bar was confirmed good stability.