La0.7Sr0.3FeO3−α perovskite hollow fiber membranes for oxygen permeation and methane conversion

► La0.7Sr0.3FeO3−α perovskite hollow fiber membranes are prepared by the phase inversion-sintering technique. ► Permeation stability in He and CO2 environment is improved compared to the Co-containing perovskite membranes. ► Membrane reaction with H2 and CH4 leads to improvement of oxygen flux and final membrane breakage. ► LSF membrane exhibits catalytic activities to both deep oxidation and partial oxidation of methane simultaneously.