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Dual phase composite oxide of Ce0.9Gd0.1O2-δ-Ba0.5Sr0.5Co0.8Fe0.2O3-δ with excellent oxygen permeation / Jian Xue in Industrial & engineering chemistry research, Vol. 51 N° 12 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 12 (Mars 2012) . - pp. 4703–4709 Titre : Dual phase composite oxide of Ce0.9Gd0.1O2-δ-Ba0.5Sr0.5Co0.8Fe0.2O3-δ with excellent oxygen permeation Type de document : texte imprimé Auteurs : Jian Xue, Auteur ; Qin Zheng, Auteur ; Yanying Wei, Auteur Année de publication : 2012 Article en page(s) : pp. 4703–4709 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Phase  membrane  Oxygen  permeation Résumé : A dual phase membrane of 60 wt % Ce0.9Gd0.1O2-δ-40 wt % Ba0.5Sr0.5Co0.8Fe0.2O3-δ (60CGO-40BSCF), which exhibits high oxygen permeation, has been prepared. X-ray diffraction (XRD) results reveal that the two oxides are compatible. An oxygen permeation flux of 2.1 mL/(min·cm2) is obtained with a 0.5 mm thick membrane under the gradient of air/He at 975 °C, which keeps steady during 180 h of operation. The oxygen permeation process is mainly controlled by the bulk diffusion of oxygen ions in 60CGO-40BSCF membrane when the membrane thickness is higher than 0.8 mm and controlled by both the surface reaction and the bulk diffusion at reduced thickness of 0.5 mm as the temperature increased from 800 to 975 °C. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300083r [article] Dual phase composite oxide of Ce0.9Gd0.1O2-δ-Ba0.5Sr0.5Co0.8Fe0.2O3-δ with excellent oxygen permeation [texte imprimé] / Jian Xue, Auteur ; Qin Zheng, Auteur ; Yanying Wei, Auteur . - 2012 . - pp. 4703–4709. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 12 (Mars 2012) . - pp. 4703–4709 Mots-clés : Phase  membrane  Oxygen  permeation Résumé : A dual phase membrane of 60 wt % Ce0.9Gd0.1O2-δ-40 wt % Ba0.5Sr0.5Co0.8Fe0.2O3-δ (60CGO-40BSCF), which exhibits high oxygen permeation, has been prepared. X-ray diffraction (XRD) results reveal that the two oxides are compatible. An oxygen permeation flux of 2.1 mL/(min·cm2) is obtained with a 0.5 mm thick membrane under the gradient of air/He at 975 °C, which keeps steady during 180 h of operation. The oxygen permeation process is mainly controlled by the bulk diffusion of oxygen ions in 60CGO-40BSCF membrane when the membrane thickness is higher than 0.8 mm and controlled by both the surface reaction and the bulk diffusion at reduced thickness of 0.5 mm as the temperature increased from 800 to 975 °C. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300083r

Oxygen permeation through U - shaped K2NiF4 - type oxide hollow - fiber membranes / Yanying Wei in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12727–12734 Titre : Oxygen permeation through U - shaped K2NiF4 - type oxide hollow - fiber membranes Type de document : texte imprimé Auteurs : Yanying Wei, Auteur ; Jun Tang, Auteur ; Lingyi Zhou, Auteur Année de publication : 2012 Article en page(s) : pp. 12727–12734 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hollow  fiber  Permeation Résumé : The first oxygen permeation data for a dense hollow-fiber membrane based on a K2NiF4-type oxide are reported. The U-shaped (Pr0.9La0.1)2(Ni0.74Cu0.21Ga0.05)O4+δ (PLNCG) hollow-fiber membranes were prepared by a phase-inversion spinning process. The dependences of the oxygen permeation on the feed air flow rate, sweep helium flow rate, oxygen partial pressure on the shell side, and operating temperature were experimentally investigated. The effects of the bulk diffusion and the surface exchange on the oxygen permeation flux through the U-shaped PLNCG hollow-fiber membranes are also discussed. During around 320 h of operation, a steady oxygen permeation flux of 1.0 mL/(min·cm2) was obtained at 975 °C under conditions of an air feed flow rate of 180 mL/min and a helium sweep flow rate of 55 mL/min. XRD and SEM analyses of the spent hollow-fiber membrane showed the good stability of the U-shaped PLNCG hollow-fiber membranes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745746 [article] Oxygen permeation through U - shaped K2NiF4 - type oxide hollow - fiber membranes [texte imprimé] / Yanying Wei, Auteur ; Jun Tang, Auteur ; Lingyi Zhou, Auteur . - 2012 . - pp. 12727–12734. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12727–12734 Mots-clés : Hollow  fiber  Permeation Résumé : The first oxygen permeation data for a dense hollow-fiber membrane based on a K2NiF4-type oxide are reported. The U-shaped (Pr0.9La0.1)2(Ni0.74Cu0.21Ga0.05)O4+δ (PLNCG) hollow-fiber membranes were prepared by a phase-inversion spinning process. The dependences of the oxygen permeation on the feed air flow rate, sweep helium flow rate, oxygen partial pressure on the shell side, and operating temperature were experimentally investigated. The effects of the bulk diffusion and the surface exchange on the oxygen permeation flux through the U-shaped PLNCG hollow-fiber membranes are also discussed. During around 320 h of operation, a steady oxygen permeation flux of 1.0 mL/(min·cm2) was obtained at 975 °C under conditions of an air feed flow rate of 180 mL/min and a helium sweep flow rate of 55 mL/min. XRD and SEM analyses of the spent hollow-fiber membrane showed the good stability of the U-shaped PLNCG hollow-fiber membranes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745746