Oxygen permeation performance of BaBiO3−δ ceramic membranes

Sunarso, J., Liu, S., Lin, Y. S. and Diniz da Costa, J. C. (2009) Oxygen permeation performance of BaBiO3−δ ceramic membranes. Journal of Membrane Science, 344 1-2: 281-287. doi:10.1016/j.memsci.2009.08.019

Author Sunarso, J.
Liu, S.
Lin, Y. S.
Diniz da Costa, J. C.
Title Oxygen permeation performance of BaBiO3−δ ceramic membranes
Formatted title
Oxygen permeation performance of BaBiO3-δ ceramic membranes
Journal name Journal of Membrane Science   Check publisher's open access policy
ISSN 0376-7388
Publication date 2009-11-15
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.memsci.2009.08.019
Volume 344
Issue 1-2
Start page 281
End page 287
Total pages 7
Editor A. L. Zydney
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2010
Language eng
Subject 090404 Membrane and Separation Technologies
859802 Management of Greenhouse Gas Emissions from Electricity Generation
Formatted abstract
In this work, perovskite BaBiO3-δ disk membranes were synthesized with the molar ratio (z) of BiO1.5 to BaO between 0.5 and 3 at varying sintering temperatures. Disk membranes with z > 1.33, associated with a lower amount of Bi-rich perovskite phase, showed mechanically weak properties while membranes with z ≤ 1 showed superior stability at temperatures in excess of 800 °C. The best performance was obtained for the z = 0.86 disk membrane, reaching oxygen fluxes of 1.2 ml min-1 cm-2 at 950 °C. This was attributed to the higher sintering temperature and the formation of oxygen deficient phase of BaBiO3-δ perovskite. For gas testing temperatures above 800 °C, it was found that the oxygen permeation was limited by both bulk diffusion and surface kinetics as oxygen flux did not increase proportionally to the inverse of membrane thickness reduction. Further analysis showed that the activation energy for oxygen ionic transport changed at 800 °C, however the z = 1 sample displayed the opposite trend from other compositions, indicating the formation of more oxygen vacancies in the crystal lattice. Mechanically stable disk membranes exposed to thermal cycling tests resulted in crystal structure instability of the pure perovskite (z = 1) and loss of oxygen vacancies while the z < 1 sample was relatively stable. Conversely, z > 1 sample showed superior thermal cycling and crystal structure stability.
Keyword Barium bismuth oxide
Perovskite membrane
Oxygen separation
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
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Created: Fri, 05 Mar 2010, 13:54:05 EST by Amanda Lee on behalf of School of Chemical Engineering