Numerical study of hydrogen permeation flux in SrCe0.95Yb0.05O3-α and SrCe0.95Tm0.05O3-α.

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Title Numerical study of hydrogen permeation flux in SrCe0.95Yb0.05O3-α and SrCe0.95Tm0.05O3-α.
Author Matsuka, Maki; Braddock, Roger David; Agranovski, Igor E
Journal Name Solid State Ionics
Year Published 2007
Place of publication Amsterdam
Publisher Elsevier
Abstract The separation of hydrogen from gas mixtures may be achieved using perovskite membranes doped with rare earth oxides. The separation flux has been studied in such membranes and is based on a model of the proton transfer mechanism. The thermodynamic equilibrium constants (Kw, Ki, Kox, Ks) and charge carrier mobilities (μOH, μVo, μh, μe) for SrCe0.95Yb0.05O3-α and SrCe0.95Tm0.05O3-α may be estimated by fitting the hydrogen permeation flux model to the actual experimental data for SrCe0.95Yb0.05O3-α and SrCe0.95Tm0.05O3-α. The results indicate that the thermodynamic equilibrium constants KH and Kw and the mobility of proton and electrons in SrCe0.95Tm0.05O3-α may be higher than for SrCe0.95Yb0.05O3-α, leading to the higher hydrogen permeation flux in SrCe0.95Tm0.05O3-α. A parametric sensitivity analysis has been performed by using the New Morris Method to investigate the influence of the thermodynamic equilibrium constants and the charge carrier mobilities on the hydrogen permeation flux model. The results indicate that the hydrogen permeation flux model utilised in this study was most sensitive to the internal electronic equilibrium constant (Ki) value and least sensitive to the hole mobility (μh).
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2007 Elsevier. Please refer to the journal's website for access to the definitive, published version.
Volume 178
Page from 1011
Page to 1019
ISSN 0167-2738
Date Accessioned 2007-06-21
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Environmental Engineering Modelling
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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