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|Title:||A new asymmetric SrCo0.8Fe0.1Ga0.1O3-δ perovskite hollow fiber membrane for stable oxygen permeability under reducing condition|
|Keywords:||Hollow fiber membrane|
Oxygen permeation membrane
|Citation:||Yang, N.-T., Kathiraser, Y., Kawi, S. (2013-02-01). A new asymmetric SrCo0.8Fe0.1Ga0.1O3-δ perovskite hollow fiber membrane for stable oxygen permeability under reducing condition. Journal of Membrane Science 428 : 78-85. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2012.11.005|
|Abstract:||A new SrCo0.8Fe0.1Ga0.1O3-δ (SCFG) perovskite material has been successfully synthesized using an EDTA-CA complexing method. The resultant SCFG powder calcined at 900°C shows perovskite-type crystal structure upon calcination at 900°C for 5h. The oxygen-permeating SCFG hollow fiber membrane prepared from the SCFG powder by the phase inversion-sintering method shows a unique asymmetric structure with porous internal-external surfaces and a dense middle layer. This SCFG hollow fiber membrane is able to achieve a good oxygen permeability of 3.5mLmin-1cm-2 at 950°C and 0.55mLmin-1cm-2 at 600°C when supplied with air using He as a sweep gas. The presence of Ga was found to significantly lower the activation energy of SCFG hollow fiber membrane. The unique asymmetric structure played a critical role in elevating the critical temperature to 900°C for transition from surface-reaction to bulk-diffusion controlled regime. Furthermore the SCFG hollow fiber membrane is very stable under reducing environment of 20mLmin-1 methane for at least 100h with an enhanced permeation of 3.4mLmin-1cm-2 at 900°C. © 2012 Elsevier B.V.|
|Source Title:||Journal of Membrane Science|
|Appears in Collections:||Staff Publications|
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