Surface effect on oxygen permeation through dense membrane of mixed-conductive LSCF perovskite-type oxide

H. Kusaba; Y. Shibata; K. Sasaki; Y. Teraoka

doi:10.1016/j.ssi.2006.05.038

Surface effect on oxygen permeation through dense membrane of mixed-conductive LSCF perovskite-type oxide

H. Kusaba, Y. Shibata, K. Sasaki, Y. Teraoka

Hydrogen Utilization Engineering

Research output: Contribution to journal › Article › peer-review

83 Citations (Scopus)

Abstract

La_0.1Sr_0.9Co_0.9Fe_0.1O_3-δ (LSCF1991) dense disks with different thicknesses and surface areas were prepared to investigate the contribution of surface reactions and bulk diffusion in oxygen permeation phenomena. The bulk diffusion controlled situation became significant with increasing the membrane thickness, and the surface reaction controlled situation prevailed at smaller surface area. The increase in surface area at the low P(O₂) (anode) side was more effective to increase the oxygen permeation flux than that at the high P(O₂) (cathode) side. The coating of a porous catalyst layer below the optimum thickness was also effective in enhancing the oxygen permeability due to the increase in surface area, but the coating with too thick layer deteriorated the permeability probably due to the increase in the gas diffusion resistance.

Original language	English
Pages (from-to)	2249-2253
Number of pages	5
Journal	Solid State Ionics
Volume	177
Issue number	26-32 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.ssi.2006.05.038
Publication status	Published - Oct 31 2006

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/j.ssi.2006.05.038

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title = "Surface effect on oxygen permeation through dense membrane of mixed-conductive LSCF perovskite-type oxide",

abstract = "La0.1Sr0.9Co0.9Fe0.1O3-δ (LSCF1991) dense disks with different thicknesses and surface areas were prepared to investigate the contribution of surface reactions and bulk diffusion in oxygen permeation phenomena. The bulk diffusion controlled situation became significant with increasing the membrane thickness, and the surface reaction controlled situation prevailed at smaller surface area. The increase in surface area at the low P(O2) (anode) side was more effective to increase the oxygen permeation flux than that at the high P(O2) (cathode) side. The coating of a porous catalyst layer below the optimum thickness was also effective in enhancing the oxygen permeability due to the increase in surface area, but the coating with too thick layer deteriorated the permeability probably due to the increase in the gas diffusion resistance.",

author = "H. Kusaba and Y. Shibata and K. Sasaki and Y. Teraoka",

note = "Funding Information: This work was partly supported by CREST of JST (Japan Science and Technology Agency).",

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T1 - Surface effect on oxygen permeation through dense membrane of mixed-conductive LSCF perovskite-type oxide

AU - Kusaba, H.

AU - Shibata, Y.

AU - Sasaki, K.

AU - Teraoka, Y.

N1 - Funding Information: This work was partly supported by CREST of JST (Japan Science and Technology Agency).

PY - 2006/10/31

Y1 - 2006/10/31

N2 - La0.1Sr0.9Co0.9Fe0.1O3-δ (LSCF1991) dense disks with different thicknesses and surface areas were prepared to investigate the contribution of surface reactions and bulk diffusion in oxygen permeation phenomena. The bulk diffusion controlled situation became significant with increasing the membrane thickness, and the surface reaction controlled situation prevailed at smaller surface area. The increase in surface area at the low P(O2) (anode) side was more effective to increase the oxygen permeation flux than that at the high P(O2) (cathode) side. The coating of a porous catalyst layer below the optimum thickness was also effective in enhancing the oxygen permeability due to the increase in surface area, but the coating with too thick layer deteriorated the permeability probably due to the increase in the gas diffusion resistance.

AB - La0.1Sr0.9Co0.9Fe0.1O3-δ (LSCF1991) dense disks with different thicknesses and surface areas were prepared to investigate the contribution of surface reactions and bulk diffusion in oxygen permeation phenomena. The bulk diffusion controlled situation became significant with increasing the membrane thickness, and the surface reaction controlled situation prevailed at smaller surface area. The increase in surface area at the low P(O2) (anode) side was more effective to increase the oxygen permeation flux than that at the high P(O2) (cathode) side. The coating of a porous catalyst layer below the optimum thickness was also effective in enhancing the oxygen permeability due to the increase in surface area, but the coating with too thick layer deteriorated the permeability probably due to the increase in the gas diffusion resistance.

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DO - 10.1016/j.ssi.2006.05.038

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SN - 0167-2738

VL - 177

SP - 2249

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JO - Solid State Ionics

JF - Solid State Ionics

IS - 26-32 SPEC. ISS.

ER -

Surface effect on oxygen permeation through dense membrane of mixed-conductive LSCF perovskite-type oxide

Abstract

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