Simultaneous removal of N2O and CH4 as the strong greenhouse-effect gases over Fe-BEA zeolite in the presence of excess O2

S. Kameoka; K. Kita; T. Takeda; S. Tanaka; S. Ito; K. Yuzaki; T. Miyadera; K. Kunimori

doi:10.1023/a:1019054930595

Simultaneous removal of N₂O and CH₄ as the strong greenhouse-effect gases over Fe-BEA zeolite in the presence of excess O₂

S. Kameoka, K. Kita, T. Takeda, S. Tanaka, S. Ito, K. Yuzaki, T. Miyadera, K. Kunimori

IMRAM - Division of Inorganic Material Research

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38 Citations (Scopus)

Abstract

Simultaneous catalytic removal of N₂O and CH₄ as the strong greenhouse-effect gases was found to be possible over an Fe-ion-exchanged BEA zeolite (Fe-BEA) by the selective catalytic reduction (SCR) of N₂O with CH₄. The direct decomposition of N₂O (2N₂O → 2N₂ + O₂) and the oxidation of CH₄ (CH₄ + 2O₂ → CO₂ + 2H₂O) over Fe-BEA zeolite required high temperature above 400 and 450 °C, respectively. Nevertheless, the catalytic reduction of N₂O by adding CH₄ over Fe-BEA zeolite readily occurred at much lower temperatures (ca. 250-350 °C) whether in the presence of O₂ or not. No oxidation of CH₄ by O₂ took place at these temperatures. On the basis of these results and the kinetic studies, it was concluded that CH₄ reacted selectively with N₂O to produce N₂, CO₂ and H₂O over Fe-BEA zeolite even in the presence of excess O₂. Overall stoichiometry of the SCR of N₂O with CH₄ was determined as follows: 4N₂O + CH₄ → 4N₂ + CO₂ + 2H₂O.

Original language	English
Pages (from-to)	169-173
Number of pages	5
Journal	Catalysis Letters
Volume	69
Issue number	3-4
DOIs	https://doi.org/10.1023/a:1019054930595
Publication status	Published - 2000 Nov

Keywords

CH
Fe-BEA zeolite
Greenhouse-effect gas
SCR of NO
Simultaneous removal

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@article{1b3331dd2174476580fe668749121910,

title = "Simultaneous removal of N2O and CH4 as the strong greenhouse-effect gases over Fe-BEA zeolite in the presence of excess O2",

abstract = "Simultaneous catalytic removal of N2O and CH4 as the strong greenhouse-effect gases was found to be possible over an Fe-ion-exchanged BEA zeolite (Fe-BEA) by the selective catalytic reduction (SCR) of N2O with CH4. The direct decomposition of N2O (2N2O → 2N2 + O2) and the oxidation of CH4 (CH4 + 2O2 → CO2 + 2H2O) over Fe-BEA zeolite required high temperature above 400 and 450 °C, respectively. Nevertheless, the catalytic reduction of N2O by adding CH4 over Fe-BEA zeolite readily occurred at much lower temperatures (ca. 250-350 °C) whether in the presence of O2 or not. No oxidation of CH4 by O2 took place at these temperatures. On the basis of these results and the kinetic studies, it was concluded that CH4 reacted selectively with N2O to produce N2, CO2 and H2O over Fe-BEA zeolite even in the presence of excess O2. Overall stoichiometry of the SCR of N2O with CH4 was determined as follows: 4N2O + CH4 → 4N2 + CO2 + 2H2O.",

keywords = "CH, Fe-BEA zeolite, Greenhouse-effect gas, SCR of NO, Simultaneous removal",

author = "S. Kameoka and K. Kita and T. Takeda and S. Tanaka and S. Ito and K. Yuzaki and T. Miyadera and K. Kunimori",

year = "2000",

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doi = "10.1023/a:1019054930595",

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pages = "169--173",

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T1 - Simultaneous removal of N2O and CH4 as the strong greenhouse-effect gases over Fe-BEA zeolite in the presence of excess O2

AU - Kameoka, S.

AU - Kita, K.

AU - Takeda, T.

AU - Tanaka, S.

AU - Ito, S.

AU - Yuzaki, K.

AU - Miyadera, T.

AU - Kunimori, K.

PY - 2000/11

Y1 - 2000/11

N2 - Simultaneous catalytic removal of N2O and CH4 as the strong greenhouse-effect gases was found to be possible over an Fe-ion-exchanged BEA zeolite (Fe-BEA) by the selective catalytic reduction (SCR) of N2O with CH4. The direct decomposition of N2O (2N2O → 2N2 + O2) and the oxidation of CH4 (CH4 + 2O2 → CO2 + 2H2O) over Fe-BEA zeolite required high temperature above 400 and 450 °C, respectively. Nevertheless, the catalytic reduction of N2O by adding CH4 over Fe-BEA zeolite readily occurred at much lower temperatures (ca. 250-350 °C) whether in the presence of O2 or not. No oxidation of CH4 by O2 took place at these temperatures. On the basis of these results and the kinetic studies, it was concluded that CH4 reacted selectively with N2O to produce N2, CO2 and H2O over Fe-BEA zeolite even in the presence of excess O2. Overall stoichiometry of the SCR of N2O with CH4 was determined as follows: 4N2O + CH4 → 4N2 + CO2 + 2H2O.

AB - Simultaneous catalytic removal of N2O and CH4 as the strong greenhouse-effect gases was found to be possible over an Fe-ion-exchanged BEA zeolite (Fe-BEA) by the selective catalytic reduction (SCR) of N2O with CH4. The direct decomposition of N2O (2N2O → 2N2 + O2) and the oxidation of CH4 (CH4 + 2O2 → CO2 + 2H2O) over Fe-BEA zeolite required high temperature above 400 and 450 °C, respectively. Nevertheless, the catalytic reduction of N2O by adding CH4 over Fe-BEA zeolite readily occurred at much lower temperatures (ca. 250-350 °C) whether in the presence of O2 or not. No oxidation of CH4 by O2 took place at these temperatures. On the basis of these results and the kinetic studies, it was concluded that CH4 reacted selectively with N2O to produce N2, CO2 and H2O over Fe-BEA zeolite even in the presence of excess O2. Overall stoichiometry of the SCR of N2O with CH4 was determined as follows: 4N2O + CH4 → 4N2 + CO2 + 2H2O.

KW - CH

KW - Fe-BEA zeolite

KW - Greenhouse-effect gas

KW - SCR of NO

KW - Simultaneous removal

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Simultaneous removal of N₂O and CH₄ as the strong greenhouse-effect gases over Fe-BEA zeolite in the presence of excess O₂

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