Hollow fibre perovskite membranes for oxygen separation

摘要

Perovskite hollow fibre membranes of the chemical composition BaZr_xCo_yFe_zO_(3-δ) (BCFZ) have been developed using a phase inversion spinning process followed by sintering. The BCFZ hollow fibre membranes show an O_2 flux of 7.6 ml/min/cm~2 at 900℃ which is the highest value so far known. From the Wagner theory it follows that the O_2 transport through thin walled perovskite hollow fibre membranes is controlled by both vacancy diffusion and interface reactions.