Oxygen permeation properties of ceria-ferrite-based composites

H. Takamura; K. Okumura; Y. Koshino; A. Kamegawa; M. Okada

doi:10.1007/s10832-004-5167-y

Oxygen permeation properties of ceria-ferrite-based composites

H. Takamura, K. Okumura, Y. Koshino, A. Kamegawa, M. Okada

ENG - Materials Science

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

52 Citations (Scopus)

Abstract

The oxygen flux density of Ce_0.8Gd_0.2O _1.9-x vol% MnFe₂O₄ (CGO-xMFO) composite-type ceramics membranes has been investigated. The samples and reforming catalysts were prepared by the Pechini process. For the CGO-xMFO composites, oxygen permeation was observed even at x = 3 vol%, presumably due to the presence of grain boundary phases. For CGO-15MFO, the n-type electronic conductivity was found to be dominant at 900°C or higher. The thickness dependence of jO ₂ revealed that surface exchange kinetics was significantly involved in the case of the membrane thickness of L < 0.5 mm. The highest oxygen flux density of 10 μ mol·cm^-2·s^-1 was achieved for CGO-15MFO with the 10 mass% Ni-Pr:CeO₂ catalyst (L = 0.25 mm) at 1000°C and a flow rate of 270 sccm.

Original language	English
Pages (from-to)	613-618
Number of pages	6
Journal	Journal of Electroceramics
Volume	13
Issue number	1-3
DOIs	https://doi.org/10.1007/s10832-004-5167-y
Publication status	Published - 2004 Jul

Keywords

Composites
Doped ceria
Oxygen permeable membranes
Partial oxidation of methane
Spinel-type ferrite

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10.1007/s10832-004-5167-y

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title = "Oxygen permeation properties of ceria-ferrite-based composites",

abstract = "The oxygen flux density of Ce0.8Gd0.2O 1.9-x vol% MnFe2O4 (CGO-xMFO) composite-type ceramics membranes has been investigated. The samples and reforming catalysts were prepared by the Pechini process. For the CGO-xMFO composites, oxygen permeation was observed even at x = 3 vol%, presumably due to the presence of grain boundary phases. For CGO-15MFO, the n-type electronic conductivity was found to be dominant at 900°C or higher. The thickness dependence of jO 2 revealed that surface exchange kinetics was significantly involved in the case of the membrane thickness of L < 0.5 mm. The highest oxygen flux density of 10 μ mol·cm-2·s-1 was achieved for CGO-15MFO with the 10 mass% Ni-Pr:CeO2 catalyst (L = 0.25 mm) at 1000°C and a flow rate of 270 sccm.",

keywords = "Composites, Doped ceria, Oxygen permeable membranes, Partial oxidation of methane, Spinel-type ferrite",

author = "H. Takamura and K. Okumura and Y. Koshino and A. Kamegawa and M. Okada",

note = "Funding Information: This work has been supported by CREST of Japan Science and Technology Corporation (JST) and Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Young Scientists (B), No. 15760512.",

year = "2004",

month = jul,

doi = "10.1007/s10832-004-5167-y",

language = "English",

volume = "13",

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T1 - Oxygen permeation properties of ceria-ferrite-based composites

AU - Takamura, H.

AU - Okumura, K.

AU - Koshino, Y.

AU - Kamegawa, A.

AU - Okada, M.

N1 - Funding Information: This work has been supported by CREST of Japan Science and Technology Corporation (JST) and Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Young Scientists (B), No. 15760512.

PY - 2004/7

Y1 - 2004/7

N2 - The oxygen flux density of Ce0.8Gd0.2O 1.9-x vol% MnFe2O4 (CGO-xMFO) composite-type ceramics membranes has been investigated. The samples and reforming catalysts were prepared by the Pechini process. For the CGO-xMFO composites, oxygen permeation was observed even at x = 3 vol%, presumably due to the presence of grain boundary phases. For CGO-15MFO, the n-type electronic conductivity was found to be dominant at 900°C or higher. The thickness dependence of jO 2 revealed that surface exchange kinetics was significantly involved in the case of the membrane thickness of L < 0.5 mm. The highest oxygen flux density of 10 μ mol·cm-2·s-1 was achieved for CGO-15MFO with the 10 mass% Ni-Pr:CeO2 catalyst (L = 0.25 mm) at 1000°C and a flow rate of 270 sccm.

AB - The oxygen flux density of Ce0.8Gd0.2O 1.9-x vol% MnFe2O4 (CGO-xMFO) composite-type ceramics membranes has been investigated. The samples and reforming catalysts were prepared by the Pechini process. For the CGO-xMFO composites, oxygen permeation was observed even at x = 3 vol%, presumably due to the presence of grain boundary phases. For CGO-15MFO, the n-type electronic conductivity was found to be dominant at 900°C or higher. The thickness dependence of jO 2 revealed that surface exchange kinetics was significantly involved in the case of the membrane thickness of L < 0.5 mm. The highest oxygen flux density of 10 μ mol·cm-2·s-1 was achieved for CGO-15MFO with the 10 mass% Ni-Pr:CeO2 catalyst (L = 0.25 mm) at 1000°C and a flow rate of 270 sccm.

KW - Composites

KW - Doped ceria

KW - Oxygen permeable membranes

KW - Partial oxidation of methane

KW - Spinel-type ferrite

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ER -

Oxygen permeation properties of ceria-ferrite-based composites

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