Enhanced oxygen permeation through perovskite hollow fibre membranes by methane activation |
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| Authors: | Hua Liu Zhaobao Pang Xiaoyao Tan Z. Shao J. Sunarso R. Ding S. Liu |
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| Affiliation: | 1. School of Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China;2. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China;3. The ARC Centre of Excellence for Functional Nanomaterials, School of Engineering, The University of Queensland, Brisbane OLD 4072, Australia |
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| Abstract: | Hollow fibre membranes of mixed conducting perovskite La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) were prepared via the combined phase inversion and sintering technique. The fibres were tested for air separation with a home-made reactor under the oxygen partial pressure gradient generated by the air/He streams. Some fibres were in situ activated by introducing methane in the He sweeping gas at high temperatures. The activated membranes with new morphology were created by transforming the inner densified surface layer to a porous structure. Compared to the original membranes, the activated gave appreciable higher oxygen fluxes. At 800 °C, the oxygen fluxes were increased by a factor of 10 after activation was carried out at 1000 °C for 1 h. |
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| Keywords: | Hollow fibre Inorganic membrane La0.6Sr0.4Co0.2Fe0.8O3 Perovskite Oxygen separation |
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