Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 207, Issue -, Pages 363-369Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2018.06.066
Keywords
Membrane; Mixed-conducting; Asymmetric; Hydrogen separation
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Funding
- National Natural Science Foundation of China [21706076, 51621001, 21536005]
- Natural Science Foundation of Guangdong [2017A030310431, 2014A030312007]
- Guangzhou Technology Project [201804010210]
- China Postdoctoral Science Foundation [2017M612665, 2018T110870]
- Fundamental Research Funds for the Central Universities [2017BQ016]
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Asymmetric membrane structure consisting thinner dense layer (decrease bulk diffusion resistance) and porous substrate (beneficial for the surface exchange) is an efficient approach to improve the hydrogen separation performance. Herein, the successfully prepared La5.5W0.6Mo0.4O11.25-delta F0.05 (LWMF05) asymmetric membrane exhibited improved hydrogen permeability and enhanced stability compared to the symmetric membrane, which achieving a maximum values of 0.16 mL min(-1) cm(-2) at 975 degrees C. The hydrogen permeation performance through the LWMF05 asymmetric membrane were investigated in detailed. And the influences of the asymmetric structure on interfacial processes during hydrogen separation were discussed, which verifies the predominance of the asymmetric structure.
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