Enhancement of oxygen permeation through La(0.6)Sr(0.4)Co(0.2)Fe(0.8)O(3-delta) hollow fibre membranes by surface modifications

Tan, Xiaoyao, Wang, Zhigang, Liu, Hua and Liu, Shaomin (2008) Enhancement of oxygen permeation through La(0.6)Sr(0.4)Co(0.2)Fe(0.8)O(3-delta) hollow fibre membranes by surface modifications. Journal of Membrane Science, 324 1-2: 128-135. doi:10.1016/j.memsci.2008.07.008


Author Tan, Xiaoyao
Wang, Zhigang
Liu, Hua
Liu, Shaomin
Title Enhancement of oxygen permeation through La(0.6)Sr(0.4)Co(0.2)Fe(0.8)O(3-delta) hollow fibre membranes by surface modifications
Formatted title
Enhancement of oxygen permeation through La0.6Sr0.4Co0.2Fe0.8O3-δ hollow fibre membranes by surface modifications
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
1873-3123
Publication date 2008-10-31
Sub-type Article (original research)
DOI 10.1016/j.memsci.2008.07.008
Volume 324
Issue 1-2
Start page 128
End page 135
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) mixed conducting hollow fibre membranes were prepared via the combined phase inversion and sintering technique. A porous layer of silver or LSCF perovskite was coated on the outside surface of the hollow fibres to improve the surface exchange kinetics. Oxygen permeation fluxes through both the modified and the unmodified LSCF hollow fibre membranes were measured under air/He gradients at different temperatures. The oxygen permeation process through the unmodified LSCF hollow fibre membranes is mainly controlled by the oxygen dissociation on the membrane surface exposed to feed gas of air. After surface modifications, the oxygen permeation fluxes can be improved from the original values of 0.01–0.81 mL standard temperature and pressure (STP) cm−2 min−1 in the unmodified hollow fibre membrane to 0.08–1.85 mL cm−2 min−1 in the Ag-coated membrane and to 0.05–1.48 mL cm−2 min−1 in the porous LSCF-modified membrane, respectively, in the temperature range of 700–1000°C. The maximum enhancements for the Ag-coated and the porous LSCF-modified membranes are achieved at 800°C to be 17.8 and 9.3 times the original flux, respectively. Due to the surface modifications, the operating temperature to achieve anticipated oxygen permeation fluxes of commercial interest can be reduced noticeably.
Keyword Hollow fibre membrane
Perovskite membranes
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Engineering Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 63 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 70 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 03 Sep 2009, 19:25:08 EST by Mr Andrew Martlew on behalf of Functional Nanomaterials