Influence of Cr doping on hydrogen permeation performance of lanthanum tungstate membrane

被引：14
作者：
Huang, Yao [1 ,2 ]
Zhang, Qiu-Yue [1 ,2 ]
Liao, Qing [3 ]
Chen, Yan [1 ,2 ]
Yan, Xi [1 ,2 ]
Guo, Xiao-Jing [1 ,2 ]
Lang, Wan-Zhong [1 ,2 ]
机构：
[1] Shanghai Normal Univ, Educ Minist, Key Lab Resource Chem, Coll Chem & Mat Sci, 100 Guilin Rd, Shanghai 200234, Peoples R China
[2] Shanghai Normal Univ, Coll Chem & Mat Sci, Shanghai Key Lab Rare Earth Funct Mat, 100 Guilin Rd, Shanghai 200234, Peoples R China
[3] Shaoxing Univ, Coll Chem & Chem Engn, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2021年 / 262卷
基金：
中国国家自然科学基金; 上海市自然科学基金;
关键词：
Hydrogen separation; Membrane; Ceramic; Lanthanum tungstate;
D O I：
10.1016/j.seppur.2021.118333
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A series of La5.5W1-xCrxO11.25-delta (LWCrx, 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 LWCr0.2 was higher than the other three samples. Moreover, the hydrogen permeation fluxes through LWCrx membranes increased with the increase of Cr content when x <= 0.2, and LWCr0.2 exhibited the highest hydrogen permeation flux because of its higher oxygen vacancy concentration. Besides, the hydrogen permeation fluxes through LWCr0.2 membrane were comparable to that through La5.5W0.8Mo0.2O11.25-delta (LWMo0.2) membrane. During a 104 h of hydrogen permeation test, the hydrogen permeation flux and phase structure changed slightly, revealing a good stability of LWCr0.2 membrane.
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收藏
页数：8
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