Oxygen permeation and stability study of La0.6Sr0.4Co0.8Ga0.2O3−δ (LSCG) hollow fiber membrane with exposure to CO2, CH4 and He

► Max. O2 flux with CO2, He and CH4 sweep is 2.4 mL min cm−2, 3 mL min cm−2 and 7.45 mL min cm−2, respectively. ► Good stability for 80 h O2 permeation under CO2 intermittently exposed to CH4 and He. ► Ga presence stabilizes Co-O structure and enhances relative acidity of membrane.