Oxygen permeation through perovskite membranes and the improvement of oxygen flux by surface modification

Leo, A., Liu, S., Diniz da Costa, J. C. and Shao, Z. (2006) Oxygen permeation through perovskite membranes and the improvement of oxygen flux by surface modification. Science and Technology of Advanced Materials, 7 8: 819-825. doi:10.1016/j.stam.2006.11.013


Author Leo, A.
Liu, S.
Diniz da Costa, J. C.
Shao, Z.
Title Oxygen permeation through perovskite membranes and the improvement of oxygen flux by surface modification
Journal name Science and Technology of Advanced Materials   Check publisher's open access policy
ISSN 1468-6996
Publication date 2006-11
Sub-type Article (original research)
DOI 10.1016/j.stam.2006.11.013
Open Access Status DOI
Volume 7
Issue 8
Start page 819
End page 825
Total pages 7
Editor T. Masumoto
Place of publication Netherlands
Publisher Elsevier BV
Collection year 2008
Language eng
Subject 290699 Chemical Engineering not elsewhere classified
660199 Energy transformation not elsewhere classified
C1
Formatted abstract
BSCF hollow fiber membranes possessing an asymmetric layered structure were prepared using a modified phase inversion process followed by subsequent sintering at temperatures from 1100 to 1175 °C. The fibers were characterized by SEM, and tested for air separation at ambient pressure and temperatures between 650 and 950 °C. Although the prepared hollow fibers resulted in self-supported asymmetric substrate with a very thin densified perovskite layer for mixed conduction, O2 permeation was controlled by surface O2 exchange kinetics rather than bulk diffusion. In order to improve O2 flux, surface modification was carried out by the attachment of Pt particles on the surface of the hollow fiber. The maximum O2 flux measured for pure perovskite hollow fiber was 0.0268 mol m−2 s−1 at 950 °C whilst O2 fluxes increased up to 25% after the surface modification using Pt micro-particles.
Keyword Hollow fiber
Perovskite
Mixed conduction
O2 Permeation
Surface modification
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Wed, 19 Sep 2007, 18:45:51 EST