Effect of moisture on chemical stability and hydrogen permeability of Ni-BaCe0.9Y0.1O3-δ cermet

被引：3
|
作者：
Fang Shumin [1 ]
Yang Jing [1 ]
Chen Chushen [1 ]
Liu Wei [1 ]
机构：
[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Lab Adv Funct Mat & Devices, Hefei 230026, Peoples R China
来源：
HIGH-PERFORMANCE CERAMICS V, PTS 1 AND 2 | 2008年 / 368-372卷
关键词：
hydrogen separation; water partial pressure; BaCeO3;
D O I：
10.4028/www.scientific.net/KEM.368-372.256
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Ni-BaCe0.9Y0.1O3-delta mixed protonic-electronic conductor can be used to separate hydrogen from syngas. Considering that water exists in syngas, it is necessary to evaluate the effect of moisture on chemical stability and hydrogen permeability of the cermet. In this paper, hydrogen permeation rates of Ni- BaCe0.9Y0.1O3-delta (40:60 in volume ratio) in different water partial pressures were measured at intermediate temperatures (600-750 degrees C). It is found that hydrogen permeation rate of the cermet is highest at an appropriate water partial pressure. Samples after experiment were analyzed by XRD, ICP and pH value measurement, in which Ba(OH)(2) and doped CeO2 were found. The reaction of water with samples resulting in insulating Ba(OH)(2) and doped CeO2 is contributed to the decrease of hydrogen permeation in excessive water partial pressure.
引用
收藏
页码：256 / 258
页数：3
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