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- W2852083159 abstract "Ceramic-carbonate dual-phase dense membrane is a promising high temperature CO2 separation membrane with remarkable CO2 permeance and theoretically infinite CO2 selectivity. This paper reports synthesis and CO2 permeation properties of asymmetric tubular dual-phase membranes with a thin samarium doped ceria (Ce0.8Sm0.2O1.9, SDC)-carbonate separation layer and a thick porous SDC-Bi1.5Y0.3Sm0.2O3-δ (BYS) support. The asymmetric tubular thin (0.12 mm) dual-phase membrane has much higher CO2 permeance and lower activation energy for permeation than the thick (1.0–1.5 mm) membranes. At 900 °C with 50%CO2/N2 feed at 1 atm, the CO2 permeation flux and permeance for the thin membrane reach 1.53 × 10−2 mol m−2 s−1 (or 2.05 mL(STP) cm−2 min−1) and 3.16 × 10−7 mol m−2 s−1 Pa−1, respectively, with activation energy for permeation of 62.5 kJ/mol. These dual-phase membranes exhibit slightly higher CO2 permeance with essentially same activation energy for permeation, and stable operation, for CO2 permeation with simulated syngas (with the composition of 49.5%CO, 36%CO2, 4.5%N2, 10%H2) feed. The CO2 permeation fluxes of the tubular asymmetric membranes can be well described by the power-function flux equation. The analysis of CO2 permeation data with the model shows that the CO2 separation performance of the tubular asymmetric membranes can be further improved by optimizing the microstructure of ceramic porous supports. This work demonstrates that asymmetric SDC-carbonate dual-phase membrane has high potential for practical application in high temperature CO2 separation." @default.
- W2852083159 created "2018-07-19" @default.
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- W2852083159 date "2018-10-01" @default.
- W2852083159 modified "2023-10-16" @default.
- W2852083159 title "CO2 permeation through asymmetric thin tubular ceramic-carbonate dual-phase membranes" @default.
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- W2852083159 doi "https://doi.org/10.1016/j.memsci.2018.07.012" @default.
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