التفاصيل البيبلوغرافية
| العنوان: |
Influence of Cr doping on hydrogen permeation performance of lanthanum tungstate membrane. |
| المؤلفون: |
Huang, Yao1 (AUTHOR), Zhang, Qiu-Yue1 (AUTHOR), Liao, Qing2 (AUTHOR), Chen, Yan1 (AUTHOR) ychen@shnu.edu.cn, Yan, Xi1 (AUTHOR), Guo, Xiao-Jing1 (AUTHOR), Lang, Wan-Zhong1 (AUTHOR) wzlang@shnu.edu.cn |
| المصدر: |
Separation & Purification Technology. May2021, Vol. 262, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*LANTHANUM, *HYDROGEN, *CHEMICAL stability, *CHROMIUM |
| مستخلص: |
• A series of Cr-doped lanthanum tungstate membranes were developed. • La 5.5 W 0.8 Cr 0.2 O 11.25-δ membrane exhibited an improved hydrogen permeation flux. • A good operational stability was achieved for La 5.5 W 0.8 Cr 0.2 O 11.25-δ membrane. A series of La 5.5 W 1-x Cr x O 11.25-δ (LWCr x , x = 0.1, 0.2, 0.3 and 0.4) powders were successfully synthesized by a traditional solid-state reaction method. The influences of Cr doping on phase structure, microstructure, hydrogen permeation and chemical stability of lanthanum tungstate were investigated in details. The oxygen vacancy concentration in LWCr 0.2 was higher than the other three samples. Moreover, the hydrogen permeation fluxes through LWCr x membranes increased with the increase of Cr content when x ≤ 0.2, and LWCr 0.2 exhibited the highest hydrogen permeation flux because of its higher oxygen vacancy concentration. Besides, the hydrogen permeation fluxes through LWCr 0.2 membrane were comparable to that through La 5.5 W 0.8 Mo 0.2 O 11.25-δ (LWMo 0.2) membrane. During a 104 h of hydrogen permeation test, the hydrogen permeation flux and phase structure changed slightly, revealing a good stability of LWCr 0.2 membrane. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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