CO2-Resistant Hydrogen Permeation Membranes Based on Doped Ceria and Nickel

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• 作者：Shumin Fang ; Lei Bi ; Litao Yan ; Wenping Sun ; Chusheng Chen ; Wei Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：June 24, 2010
• 年：2010
• 卷：114
• 期：24
• 页码：10986-10991
• 全文大小：318K
• 年卷期：v.114,no.24(June 24, 2010)
• ISSN：1932-7455

文摘

Composite membranes consisting of a proton-conducting ceramic and an electronic conductor are promising in reducing the cost in the separation of hydrogen from CO₂. However, the lack of a stable ceramic in CO₂ with sufficient proton conductivity remains a great hurdle. In this study, we investigated the hydrogen permeation performance and chemical stability of composite membranes based on doped ceria and Ni. Doped ceria used to be considered as a very poor proton conductor for a long time. However, our results show that ceria heavily doped with rare earth element possesses significant proton conductivity. Compared with membranes based on perovskite-type oxides, hydrogen separation membranes based on fluorite-type ceria show much higher stability in H₂O and CO₂.