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Oxygen permeation fluxes (JO2) of a coated or uncoated BCFZ hollow-fiber membrane as a function of temperature. Membrane area: 0.8 cm2. (A) Core side: FAir = 150 cm3 min−1. Shell side: FHe = 49 cm3 min−1, FNe = 1 cm3 min−1 (for calculating JO2). (B) Core side: FAir = 149 cm3 min−1, FNe = 1 cm3 min−1 (for calculating JO2). Shell side: FHe = 40 cm3 min−1, FCH4 = 10 cm3 min−1.
