Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 17, Pages 14608-14615Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.07.098
Keywords
Membrane; Hydrogen permeation; Ceramic-metal; Dual-phase; CO2-tolerant
Categories
Funding
- Natural Science Foundation of China [21536005, 51621001, 21606086]
- Natural Science Foundation of the Guangdong Province [2014A030312007]
- Guangdong Natural Science Funds for Distinguished Young Scholar, Guangzhou Technology Project [201707010317]
- China Postdoctoral Science Foundation [2017M612665]
- Fundamental Research Funds for the Central Universities [20178Q016]
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Enhancing the ambi-polar conductivity of the ceramic hydrogen permeable membrane by introducing an electron conductive metallic phase is quite effective, which is helpful for the hydrogen permeation flux improvement. To develop CO2-tolerant hydrogen permeable membranes with better hydrogen permeability, NiLa5.5WO11.25-delta (Ni-LWO) cermet membranes are fabricated. The alkaline earth metal-free ceramic LWO is used as the main proton-conductive phase and Ni is used as the main electron-conductive phase. The Ni-LWO membrane exhibits good chemical stability in CO2-containing atmosphere since its hydrogen permeability maintains well in the measurement for about 180 h. Compared with the LWO ceramic membrane, the hydrogen permeability of the Ni-LWO membrane has been improved significantly. The Ni/LWO ratio has great impact on the performance of the cermet membrane. Meanwhile, among all the dual-phase Ni-LWO membranes with different Ni/LWO volume ratios, the membrane with 60 vol% Ni shows the highest hydrogen permeation flux of 0.18 ml min(-1) cm(-2) at 1000 degrees C when the feed gas contains 50% H-2.
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