Synthesis and Characterization of 40 wt % CePrO-60 wt % NdSrFeCuO Dual-Phase Membranes for Efficient Oxygen Separation.

Dense, H- and CO-resistant, oxygen-permeable 40 wt % CePrO-60 wt % NdSrFeCuOdual-phase membranes were prepared in a one-pot process. These Nd-containing dual-phase membranes have up to 60% lower material costs than many classically used dual-phase materials. The CePrO-NdSrFeCuO sample demonstrates outstanding activity and a regenerative ability in the presence of different atmospheres, especially in a reducing atmosphere and pure CO atmosphere in comparison with all investigated samples. The oxygen permeation fluxes across a CePrO-NdSrFeCuO membrane reached up to 1.02 mL min cm and 0.63 mL min cm under an air/He and air/CO gradient at = 1223 K, respectively. In addition, a CePrO-NdSrFeCuO membrane (0.65 mm thickness) shows excellent long-term self-healing stability for 125 h. The repeated membrane fabrication delivered oxygen permeation fluxes had a deviation of less than 5%. These results indicate that this highly renewable dual-phase membrane is a potential candidate for long lifetime, high temperature gas separation applications and coupled reaction-separation processes.