| 第一作者： | Jia, LJ (Jia, Lujian); Liu, MK (Liu, Mengke); Xu, X (Xu, Xia); Dong, WC (Dong, Weichao); Jiang, HQ (Jiang, Heqing); |
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| 联系作者： | Jia, LJ (Jia, Lujian); Liu, MK (Liu, Mengke); Xu, X (Xu, Xia); Dong, WC (Dong, Weichao); Jiang, HQ (Jiang, Heqing); |
| 发表年度： | 2021 |
| 卷： | 256 |
| 页： | - |
| 摘要： | Ceramic hydrogen separation membrane based on mixed protonic-electronic conductor has received considerable attention due to the advantage of 100% H-2 selectivity. However, their widespread application faces two major hurdles including the limited hydrogen separation performance and chemical instability especially in CO2-containing atmospheres. Herein, using Gd-doped ceria (CGO) with excellent oxygen ionic conductivity to dope Sr-based hydrogen separation membrane, a novel triple-conducting (H+/O2-/e(-)) membrane Ce0.90Gd0.10O3-delta-SrCe0.95Fe0.05O3 (-delta)-SrFe0.95Ce0.05O3-delta (CGO-SCF-SFC) was developed via automatic phase-separation of ceramic precursor after high temperature sintering, which showed both improved H-2 separation performance and CO2-tolerance. The three chemically compatible phases CGO, SCF and SFC act as mainly oxygen-ionic conductor, protonic conductor and electronic conductor, respectively. The enhanced H-2 flux with value of 0.54 mL min(-1) cm(-2) was achieved at 940 degrees C, which was attributed to two parts: (1) hydrogen separated as proton through SCF-SFC network; (2) hydrogen produced from water splitting that is enhanced by in situ oxygen removal through CGO phase. Moreover, benefiting from the suppression of CO2 adsorption and carbonate formation, a stable hydrogen separation flux of 0.33 mL min(-1) cm(-2) was obtained under CO2-containing atmospheres, indicating the enhanced CO2-tolerance of the triple-conducting (H+/O2-/e(-)) membrane CGO-SCF-SFC in comparison with the membrane SCF-SFC. |
| 刊物名称： | SEPARATION AND PURIFICATION TECHNOLOGY |
| 影响因子： | 5.107 |
| 全文链接： | https://www.sciencedirect.com/science/article/pii/S1383586620322723?via%3Dihub |
