Oxygen transport through dense perovskite-type La1-xSrxFeO3-δ membranes

J.E. ten Elshof; H.J.M. Bouwmeester; H. Verweij

Oxygen transport through dense perovskite-type La_1-xSr_xFeO_3-δ membranes

J.E. ten Elshof, H.J.M. Bouwmeester, H. Verweij

Inorganic Materials Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

25 Downloads (Pure)

Abstract

Oxygen permeation measurements were performed on dense La_1-xSr_xFeO_3-δ
(r=0.1-0.4) membranes at 1273 K. The materials were investigated in air/He and air/He,CO,CO₂ gradients. The fluxes increased with increasing Sr content and were strongly enhanced by the presence of CO, up to values of 25 mmol m^-2 s^-1. In air/He gradients the permeation is bulk controlled and can be modelled by Wagner theory incorporating a random point defect model. Oxygen vacancy diffusion coefficients were calculated to range between 5.6-8.6-10^-6 cm² s^-1. In air/CO,CO₂ gradients the permeation process appeared to be totally limited by the surface reaction rate. To account for this behaviour, models are proposed in which surface oxygen vacancies act as active surface sites.

Original language	English
Title of host publication	Ceramic Membranes I
Subtitle of host publication	Proceedings of the First International Symposium on Ceramic Membranes
Editors	H.U. Anderson, A.C. Khandkar, M. Liu
Place of Publication	Pennington, NJ
Publisher	Electrochemical Society
Pages	37-47
Number of pages	10
ISBN (Print)	9781566771191
Publication status	Published - 28 Jan 1997
Event	1st International Symposium on Ceramic Membranes 1995 - Chicago, United States Duration: 8 Oct 1995 → 13 Oct 1995 Conference number: 1

Publication series

Name	Proceedings
Publisher	The Electrochemical Society Inc.
Volume	95-24
ISSN (Print)	0161-6374

Conference

Conference	1st International Symposium on Ceramic Membranes 1995
Country/Territory	United States
City	Chicago
Period	8/10/95 → 13/10/95

Access to Document

TenElshof1997oxygenFinal published version, 314 KB

Cite this

@inproceedings{f5aeb56149c84c459727a4a0c652a41d,

title = "Oxygen transport through dense perovskite-type La1-xSrxFeO3-δ membranes",

abstract = "Oxygen permeation measurements were performed on dense La1-xSrxFeO3-δ(r=0.1-0.4) membranes at 1273 K. The materials were investigated in air/He and air/He,CO,CO2 gradients. The fluxes increased with increasing Sr content and were strongly enhanced by the presence of CO, up to values of 25 mmol m-2 s-1. In air/He gradients the permeation is bulk controlled and can be modelled by Wagner theory incorporating a random point defect model. Oxygen vacancy diffusion coefficients were calculated to range between 5.6-8.6-10-6 cm2 s-1. In air/CO,CO2 gradients the permeation process appeared to be totally limited by the surface reaction rate. To account for this behaviour, models are proposed in which surface oxygen vacancies act as active surface sites.",

author = "{ten Elshof}, J.E. and H.J.M. Bouwmeester and H. Verweij",

year = "1997",

month = jan,

day = "28",

language = "English",

isbn = "9781566771191",

series = "Proceedings",

publisher = "Electrochemical Society",

pages = "37--47",

editor = "H.U. Anderson and A.C. Khandkar and M. Liu",

booktitle = "Ceramic Membranes I",

address = "United States",

note = "1st International Symposium on Ceramic Membranes 1995 ; Conference date: 08-10-1995 Through 13-10-1995",

}

ten Elshof, JE , Bouwmeester, HJM & Verweij, H 1997, Oxygen transport through dense perovskite-type La_1-xSr_xFeO_3-δ membranes. in HU Anderson, AC Khandkar & M Liu (eds), Ceramic Membranes I: Proceedings of the First International Symposium on Ceramic Membranes. Proceedings, vol. 95-24, Electrochemical Society, Pennington, NJ, pp. 37-47, 1st International Symposium on Ceramic Membranes 1995, Chicago, Illinois, United States, 8/10/95.

Oxygen transport through dense perovskite-type La_1-xSr_xFeO_3-δ membranes. / ten Elshof, J.E.; Bouwmeester, H.J.M.; Verweij, H.
Ceramic Membranes I: Proceedings of the First International Symposium on Ceramic Membranes. ed. / H.U. Anderson; A.C. Khandkar; M. Liu. Pennington, NJ: Electrochemical Society, 1997. p. 37-47 (Proceedings; Vol. 95-24).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Oxygen transport through dense perovskite-type La1-xSrxFeO3-δ membranes

AU - ten Elshof, J.E.

AU - Bouwmeester, H.J.M.

AU - Verweij, H.

N1 - Conference code: 1

PY - 1997/1/28

Y1 - 1997/1/28

N2 - Oxygen permeation measurements were performed on dense La1-xSrxFeO3-δ(r=0.1-0.4) membranes at 1273 K. The materials were investigated in air/He and air/He,CO,CO2 gradients. The fluxes increased with increasing Sr content and were strongly enhanced by the presence of CO, up to values of 25 mmol m-2 s-1. In air/He gradients the permeation is bulk controlled and can be modelled by Wagner theory incorporating a random point defect model. Oxygen vacancy diffusion coefficients were calculated to range between 5.6-8.6-10-6 cm2 s-1. In air/CO,CO2 gradients the permeation process appeared to be totally limited by the surface reaction rate. To account for this behaviour, models are proposed in which surface oxygen vacancies act as active surface sites.

AB - Oxygen permeation measurements were performed on dense La1-xSrxFeO3-δ(r=0.1-0.4) membranes at 1273 K. The materials were investigated in air/He and air/He,CO,CO2 gradients. The fluxes increased with increasing Sr content and were strongly enhanced by the presence of CO, up to values of 25 mmol m-2 s-1. In air/He gradients the permeation is bulk controlled and can be modelled by Wagner theory incorporating a random point defect model. Oxygen vacancy diffusion coefficients were calculated to range between 5.6-8.6-10-6 cm2 s-1. In air/CO,CO2 gradients the permeation process appeared to be totally limited by the surface reaction rate. To account for this behaviour, models are proposed in which surface oxygen vacancies act as active surface sites.

M3 - Conference contribution

SN - 9781566771191

T3 - Proceedings

SP - 37

EP - 47

BT - Ceramic Membranes I

A2 - Anderson, H.U.

A2 - Khandkar, A.C.

A2 - Liu, M.

PB - Electrochemical Society

CY - Pennington, NJ

T2 - 1st International Symposium on Ceramic Membranes 1995

Y2 - 8 October 1995 through 13 October 1995

ER -