Abstract
In this work, the dual-phase La0.5Sr0.5Fe0.8Co0.2O3-δ-Ce0.8Sm0.2O2-δ (LSCF-SDC) (65–35 wt%) hollow fiber membranes were prepared via combined method of phase inversion and sintering technique. In situ X-ray diffraction (XRD) experiments showed that the structure of LSCF-SDC is stable in air and vacuum (pO2 ∼ 10−4 atm) in the temperature range of 30–900 °C. Moreover, the effect of temperature, oxygen partial pressure and surface modification on the oxygen fluxes across LSCF-SDC hollow fiber membranes were studied. The results obtained indicate that the oxygen fluxes through dual-phase LSCF-SDC hollow fiber membranes are limited by surface exchange reactions. LSCF-SDC hollow fiber membranes also demonstrated high resistance to CO2 in short-term stability test.
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