The enhancement of oxygen flux on Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) hollow fibers using silver surface modification

Leo, Adrian, Liu, Shaomin and Diniz da Costa, João C. (2009) The enhancement of oxygen flux on Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) hollow fibers using silver surface modification. Journal of Membrane Science, 340 1-2: 148-153. doi:10.1016/j.memsci.2009.05.022


Author Leo, Adrian
Liu, Shaomin
Diniz da Costa, João C.
Title The enhancement of oxygen flux on Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) hollow fibers using silver surface modification
Formatted title
The enhancement of oxygen flux on Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) hollow fibers using silver surface modification
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
1873-3123
Publication date 2009-09-15
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.memsci.2009.05.022
Volume 340
Issue 1-2
Start page 148
End page 153
Total pages 6
Editor A. L. Zydney
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2010
Language eng
Subject C1
859802 Management of Greenhouse Gas Emissions from Electricity Generation
090404 Membrane and Separation Technologies
Abstract Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) hollow fibers were fabricated using a phase inversion/sintering method. As oxygen permeation of BSCF hollow fibers is controlled by the rate surface exchange kinetics, catalytic Ag particles were coated on both inner and outer surfaces using chemical deposition method, as verified by SEM and EDX The Ag coated BSCF membranes showed up to 100% increase in oxygen permeation at 700 degrees C, and improvements lower than 10% were measured at 950 degrees C as compared with unmodified membranes. It was found that Ag catalyst surface loading was non-homogenous and concentrated on the perovskite grain boundaries. As a result, lighter Ag surface loading delivered improved oxygen flux while oxygen flux reached a maximum even though in the presence of excess catalyst loading. The catalytic activity of Ag was beneficial in enhancing surface reaction kinetics up to 850 degrees C attributed to the spillover effect. Above this temperature, the increase in oxygen permeation rate was marginally diminished due to the reduction of the spillover effect.
Keyword Hollow fiber
Perovskite
Mixed conduction
Oxygen permeation
Surface modification
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
ERA 2012 Admin Only
 
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Created: Thu, 03 Sep 2009, 17:45:32 EST by Mr Andrew Martlew on behalf of School of Chemical Engineering