Direct decomposition of NO into N 2 and O 2 on BaMnO 3 -based perovskite oxides

Hideharu Iwakuni, Yusuke Shinmyou, Hiroshi Yano, Hiroshige Matsumoto, Tatsumi Ishihara

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Abstract

Effects of dopant in BaMnO 3 perovskite oxide on the NO direct decomposition activity were investigated. NO direct decomposition activity was greatly elevated by doping La and Mg for Ba and Mn site in BaMnO 3 , respectively. The highest N 2 yield was achieved on Ba 0.8 La 0.2 Mn 0.8 Mg 0.2 O 3 . The NO decomposition rate increased with increasing NO partial pressure with P NO 1.19 . Coexistence of oxygen lowered the N 2 yield with P O2 - 0.18 ; however, N 2 yield of 40% was sustained even under coexisting of 5% O 2 at 1123 K. Adsorption state of oxygen was also studied with temperature programmed desorption (TPD) method and the desorption temperature of oxygen was lowered by doping Mg for Mn site in BaMnO 3 .

Original languageEnglish
Pages (from-to)299-306
Number of pages8
JournalApplied Catalysis B: Environmental
Volume74
Issue number3-4
DOIs
Publication statusPublished - Jul 31 2007

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perovskite
Perovskite
Oxides
Doping (additives)
oxide
decomposition
Oxygen
Decomposition
oxygen
desorption
Thermodynamic properties
Temperature programmed desorption
partial pressure
Partial pressure
coexistence
Desorption
temperature
adsorption
Adsorption
Temperature

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

Cite this

Direct decomposition of NO into N 2 and O 2 on BaMnO 3 -based perovskite oxides . / Iwakuni, Hideharu; Shinmyou, Yusuke; Yano, Hiroshi; Matsumoto, Hiroshige; Ishihara, Tatsumi.

In: Applied Catalysis B: Environmental, Vol. 74, No. 3-4, 31.07.2007, p. 299-306.

Research output: Contribution to journalArticle

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AU - Iwakuni, Hideharu

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AU - Ishihara, Tatsumi

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N2 - Effects of dopant in BaMnO 3 perovskite oxide on the NO direct decomposition activity were investigated. NO direct decomposition activity was greatly elevated by doping La and Mg for Ba and Mn site in BaMnO 3 , respectively. The highest N 2 yield was achieved on Ba 0.8 La 0.2 Mn 0.8 Mg 0.2 O 3 . The NO decomposition rate increased with increasing NO partial pressure with P NO 1.19 . Coexistence of oxygen lowered the N 2 yield with P O2 - 0.18 ; however, N 2 yield of 40% was sustained even under coexisting of 5% O 2 at 1123 K. Adsorption state of oxygen was also studied with temperature programmed desorption (TPD) method and the desorption temperature of oxygen was lowered by doping Mg for Mn site in BaMnO 3 .

AB - Effects of dopant in BaMnO 3 perovskite oxide on the NO direct decomposition activity were investigated. NO direct decomposition activity was greatly elevated by doping La and Mg for Ba and Mn site in BaMnO 3 , respectively. The highest N 2 yield was achieved on Ba 0.8 La 0.2 Mn 0.8 Mg 0.2 O 3 . The NO decomposition rate increased with increasing NO partial pressure with P NO 1.19 . Coexistence of oxygen lowered the N 2 yield with P O2 - 0.18 ; however, N 2 yield of 40% was sustained even under coexisting of 5% O 2 at 1123 K. Adsorption state of oxygen was also studied with temperature programmed desorption (TPD) method and the desorption temperature of oxygen was lowered by doping Mg for Mn site in BaMnO 3 .

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