Fe/Mn-based perovskite-type oxides with excellent oxygen permeability and reduction tolerance

Yasutake Teraoka, Hironobu Shimokawa, Hajime Kusaba, Kazunari Sasaki

研究成果: ジャーナルへの寄稿Conference article

3 引用 (Scopus)

抄録

A family of Co-free, Fe/Mn-based perovskite-type oxides, (Sr, A′)(Fe, Mn)O3-δ (A′=La, Ba, Ca), was synthesized, and their oxygen permeability and phase stability in reducing atmosphere were investigated. The substitution of Mn at B site caused the decrease in oxygen permeability. As for the effect of A-site substitution, prominent promotion was observed by the substitution of Ba for 30% of Sr, and Ba0.3Sr 0.7FeO3-δ was found to be one of most excellent oxygen permeable materials with the permeation flux of 3.0 cm3(STP) cm-2 min-1 at 900°C. Reduction tolerance was evaluated by TG measurements in a 5%H2/N2 stream up to 1000°C. After the TG measurements, crystal structures of La-Sr-Co-Fe-O and Sr-Fe-(Mn)-O perovskites were decomposed or transformed into low oxygen permeable phases, but the perovskite-type structure of Ba-Sr-Fe-(Mn)-O survived. The Fe/Mn-based perovskites with high oxygen permeability and exceeding reduction tolerance could be used as stable membrane materials for membrane reactors catalyzing NO-CH4 reaction and the partial oxidation of CR4 into synthesis gas.

元の言語英語
記事番号K2.6
ページ(範囲)77-83
ページ数7
ジャーナルMaterials Research Society Symposium Proceedings
835
出版物ステータス出版済み - 6 20 2005
イベントSolid State Ionics - 2004 - Boston, MA, 米国
継続期間: 11 29 200412 2 2004

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perovskite
Perovskite
Oxides
tolerance
oxide
permeability
Oxygen
oxygen
substitution
Substitution reactions
membrane
Membranes
Phase stability
Synthesis gas
Permeation
crystal structure
Crystal structure
Fluxes
oxidation
Oxidation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Fe/Mn-based perovskite-type oxides with excellent oxygen permeability and reduction tolerance. / Teraoka, Yasutake; Shimokawa, Hironobu; Kusaba, Hajime; Sasaki, Kazunari.

:: Materials Research Society Symposium Proceedings, 巻 835, K2.6, 20.06.2005, p. 77-83.

研究成果: ジャーナルへの寄稿Conference article

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title = "Fe/Mn-based perovskite-type oxides with excellent oxygen permeability and reduction tolerance",
abstract = "A family of Co-free, Fe/Mn-based perovskite-type oxides, (Sr, A′)(Fe, Mn)O3-δ (A′=La, Ba, Ca), was synthesized, and their oxygen permeability and phase stability in reducing atmosphere were investigated. The substitution of Mn at B site caused the decrease in oxygen permeability. As for the effect of A-site substitution, prominent promotion was observed by the substitution of Ba for 30{\%} of Sr, and Ba0.3Sr 0.7FeO3-δ was found to be one of most excellent oxygen permeable materials with the permeation flux of 3.0 cm3(STP) cm-2 min-1 at 900°C. Reduction tolerance was evaluated by TG measurements in a 5{\%}H2/N2 stream up to 1000°C. After the TG measurements, crystal structures of La-Sr-Co-Fe-O and Sr-Fe-(Mn)-O perovskites were decomposed or transformed into low oxygen permeable phases, but the perovskite-type structure of Ba-Sr-Fe-(Mn)-O survived. The Fe/Mn-based perovskites with high oxygen permeability and exceeding reduction tolerance could be used as stable membrane materials for membrane reactors catalyzing NO-CH4 reaction and the partial oxidation of CR4 into synthesis gas.",
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T1 - Fe/Mn-based perovskite-type oxides with excellent oxygen permeability and reduction tolerance

AU - Teraoka, Yasutake

AU - Shimokawa, Hironobu

AU - Kusaba, Hajime

AU - Sasaki, Kazunari

PY - 2005/6/20

Y1 - 2005/6/20

N2 - A family of Co-free, Fe/Mn-based perovskite-type oxides, (Sr, A′)(Fe, Mn)O3-δ (A′=La, Ba, Ca), was synthesized, and their oxygen permeability and phase stability in reducing atmosphere were investigated. The substitution of Mn at B site caused the decrease in oxygen permeability. As for the effect of A-site substitution, prominent promotion was observed by the substitution of Ba for 30% of Sr, and Ba0.3Sr 0.7FeO3-δ was found to be one of most excellent oxygen permeable materials with the permeation flux of 3.0 cm3(STP) cm-2 min-1 at 900°C. Reduction tolerance was evaluated by TG measurements in a 5%H2/N2 stream up to 1000°C. After the TG measurements, crystal structures of La-Sr-Co-Fe-O and Sr-Fe-(Mn)-O perovskites were decomposed or transformed into low oxygen permeable phases, but the perovskite-type structure of Ba-Sr-Fe-(Mn)-O survived. The Fe/Mn-based perovskites with high oxygen permeability and exceeding reduction tolerance could be used as stable membrane materials for membrane reactors catalyzing NO-CH4 reaction and the partial oxidation of CR4 into synthesis gas.

AB - A family of Co-free, Fe/Mn-based perovskite-type oxides, (Sr, A′)(Fe, Mn)O3-δ (A′=La, Ba, Ca), was synthesized, and their oxygen permeability and phase stability in reducing atmosphere were investigated. The substitution of Mn at B site caused the decrease in oxygen permeability. As for the effect of A-site substitution, prominent promotion was observed by the substitution of Ba for 30% of Sr, and Ba0.3Sr 0.7FeO3-δ was found to be one of most excellent oxygen permeable materials with the permeation flux of 3.0 cm3(STP) cm-2 min-1 at 900°C. Reduction tolerance was evaluated by TG measurements in a 5%H2/N2 stream up to 1000°C. After the TG measurements, crystal structures of La-Sr-Co-Fe-O and Sr-Fe-(Mn)-O perovskites were decomposed or transformed into low oxygen permeable phases, but the perovskite-type structure of Ba-Sr-Fe-(Mn)-O survived. The Fe/Mn-based perovskites with high oxygen permeability and exceeding reduction tolerance could be used as stable membrane materials for membrane reactors catalyzing NO-CH4 reaction and the partial oxidation of CR4 into synthesis gas.

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