Abstract
Dense perovskite hollow-fiber membranes based on BaCo0.7Fe0.2Ta0.1O3−δ (BCFT) are prepared by a phase inversion spinning process. The thermal cycling performance and the dependences of oxygen permeation on the air flow rate on the shell side, the helium flow rate on the core side, the oxygen partial pressures, and the operating temperatures are experimentally investigated. The oxygen transport through the U-shaped hollow-fiber membrane is controlled by both surface reaction and bulk diffusion at the temperature ranges of 750–950 °C, whereas the oxygen permeation is predominantly controlled by the surface reaction at 700 °C. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses of the spent hollow-fiber membrane after oxygen permeation for 250 h show the good stability of the U-shaped BCFT hollow-fiber membrane.
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