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- W2980932295 endingPage "116224" @default.
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- W2980932295 abstract "Dual-phase Ce0.85Sm0.15O1.925-Sm0.6Sr0.4Al0.3Fe0.7O3-δ (SDC-SSAF) mixed ionic-electronic conducting (MIEC) membrane, which is highly stable in CO2-rich atmosphere, is a promising candidate for oxyfuel applications. Here, the oxygen permeation behavior of the single-phase perovskite Sm0.6Sr0.4Al0.3Fe0.7O3-δ (SSAF) membrane is analyzed in comparison to that of SDC-SSAF. The oxygen permeation resistances and kinetic constants of a 0.5 mm-thick SSAF disk were regressed using the Zhu model. At 950 °C and under an oxygen partial pressure (PO2) gradient of 0.21 bar/0.02 bar, the characteristic thickness (Lc) was 0.443 mm. Oxygen permeation in SSAF is generally limited by a mixture of surface exchange reactions and bulk diffusion between 800 and 950 °C at 0.21 bar/0.02 bar (feed/permeate). Overall, temperature is more dominant than PO2 gradient to enhance the oxygen permeation flux. A surface exchange-bulk diffusion transition region that exists between 850 and 875 °C in SDC-SSAF case is absent in SSAF case since oxygen permeation through SSAF is governed by mixed bulk diffusion and surface exchange." @default.
- W2980932295 created "2019-10-25" @default.
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- W2980932295 date "2020-03-01" @default.
- W2980932295 modified "2023-10-18" @default.
- W2980932295 title "Oxygen permeation through single-phase perovskite membrane: Modeling study and comparison with the dual-phase membrane" @default.
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- W2980932295 doi "https://doi.org/10.1016/j.seppur.2019.116224" @default.
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