Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production

Mixed conducting perovskite membranes have the potentials to replace the conventional expensive cryogenic method to separate oxygen from air and improve the viabilities of these clean energy technologies which need pure oxygen as the feed gas. In this paper, a series of SrCo1−xWxO3−δ (x=0.05–0.2) pe...

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Main Authors:	Chan, J., Zhang, K., Zhang, C., Tian, H., Liu, Shaomin
Format:	Journal Article
Published:	Elsevier Ltd 2015
Online Access:	http://hdl.handle.net/20.500.11937/21979

id	curtin-20.500.11937-21979
recordtype	eprints
spelling	curtin-20.500.11937-219792017-09-13T13:53:06Z Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production Chan, J. Zhang, K. Zhang, C. Tian, H. Liu, Shaomin Mixed conducting perovskite membranes have the potentials to replace the conventional expensive cryogenic method to separate oxygen from air and improve the viabilities of these clean energy technologies which need pure oxygen as the feed gas. In this paper, a series of SrCo1−xWxO3−δ (x=0.05–0.2) perovskite membranes were synthesized and characterized for their potential in oxygen separation. The crystal structure and oxygen permeation flux of the membranes were systematically investigated. Due to the enhancement of phase stability by tungsten doping, the preferred cubic perovskite structure at lower temperature is successfully obtained and maintained at the doping concentration from 5% to 10%. However, the further doping increase leads to the formation of other crystal phase unfavorable for oxygen permeation. The tungsten doping concentration also exerts significant effects on the oxygen permeability of the resultant membranes. SrCo0.9Wx0.1O3−δ exhibited the highest oxygen permeation flux among the tested samples, and reached a flux value up to 2.6 ml cm−2 min−1 at 900 °C under an air/helium oxygen gradient for a 1 mm thick membrane, comparing favorably with the best membrane ever-reported. Long-term operation test also signals the excellent permeation stability under operating conditions. 2015 Journal Article http://hdl.handle.net/20.500.11937/21979 10.1016/j.ceramint.2015.08.035 Elsevier Ltd restricted
repository_type	Digital Repository
institution_category	Local University
institution	Curtin University Malaysia
building	Curtin Institutional Repository
collection	Online Access
description	Mixed conducting perovskite membranes have the potentials to replace the conventional expensive cryogenic method to separate oxygen from air and improve the viabilities of these clean energy technologies which need pure oxygen as the feed gas. In this paper, a series of SrCo1−xWxO3−δ (x=0.05–0.2) perovskite membranes were synthesized and characterized for their potential in oxygen separation. The crystal structure and oxygen permeation flux of the membranes were systematically investigated. Due to the enhancement of phase stability by tungsten doping, the preferred cubic perovskite structure at lower temperature is successfully obtained and maintained at the doping concentration from 5% to 10%. However, the further doping increase leads to the formation of other crystal phase unfavorable for oxygen permeation. The tungsten doping concentration also exerts significant effects on the oxygen permeability of the resultant membranes. SrCo0.9Wx0.1O3−δ exhibited the highest oxygen permeation flux among the tested samples, and reached a flux value up to 2.6 ml cm−2 min−1 at 900 °C under an air/helium oxygen gradient for a 1 mm thick membrane, comparing favorably with the best membrane ever-reported. Long-term operation test also signals the excellent permeation stability under operating conditions.
format	Journal Article
author	Chan, J. Zhang, K. Zhang, C. Tian, H. Liu, Shaomin
spellingShingle	Chan, J. Zhang, K. Zhang, C. Tian, H. Liu, Shaomin Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production
author_facet	Chan, J. Zhang, K. Zhang, C. Tian, H. Liu, Shaomin
author_sort	Chan, J.
title	Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production
title_short	Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production
title_full	Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production
title_fullStr	Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production
title_full_unstemmed	Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production
title_sort	novel tungsten stabilizing srco1−xwxo3−δ membranes for oxygen production
publisher	Elsevier Ltd
publishDate	2015
url	http://hdl.handle.net/20.500.11937/21979
first_indexed	2018-09-06T20:23:34Z
last_indexed	2018-09-06T20:23:34Z
_version_	1610891043002122240

Novel tungsten stabilizing SrCo1−xWxO3−δ membranes for oxygen production

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