Effect of Moisture on Chemical Stability and Hydrogen Permeability of Ni-BaCe0.9Y0.1O3-δ Cermet

摘要：

　　Ni-BaCe0.9Y0.1O3-δ 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-δ (40∶60 in volume ratio) in different water partial pressures were measured at intermediate temperatures (600-750℃).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.

关键词： Hydrogen separation Water partial pressure BaCeO3

作者: Fang Shumin Yang Jing Chen Chushen Liu Wei

作者单位: Laboratory of Advanced Functional Materials and Devices,Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 256-258

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）