Synthesis and de-NOX properties of ZnO-Ga2O 3-Al2O3 spinel

Md Hasan Zahir; Shingo Katayama; Masanobu Awano

doi:10.1016/j.matchemphys.2004.02.014

Synthesis and de-NO_X properties of ZnO-Ga₂O ₃-Al₂O₃ spinel

Md Hasan Zahir^*, Shingo Katayama, Masanobu Awano

^*Corresponding author for this work

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

22 Scopus citations

Abstract

Spinel powders with additions of Zn²⁺, Ni²⁺, Mn ²⁺ and Fe²⁺ cations into Ga₂O ₃-Al₂O₃ were synthesized by a co-precipitation method from a mixed solution of nitrate salts in the presence of aqueous ammonia. Effective reduction of NO to N₂ using hydrocarbon in the presence of a high concentration of O₂ can be accomplished using spinel-type catalysts. Among the catalysts tested, 30mol% ZnO-containing Ga ₂O₃-Al₂O₃ with a pure spinel phase structure exhibited the highest catalytic activity for NO reduction. The addition of ZnO further enhanced the activity of Ga₂O ₃-Al₂O₃ over a wide temperature region. The high activity of ZnO-Ga₂O₃-Al₂O₃ was attributed to the spinel-type structure and could be qualitatively correlated with acid-base centers. Combined effect of H₂O vapor and SO ₂ on ZnO-Ga₂O₃-Al₂O₃ catalyst for the reduction of NO by C₂H₄ at 500°C was also studied.

Original language	English
Pages (from-to)	99-104
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	86
Issue number	1
DOIs	https://doi.org/10.1016/j.matchemphys.2004.02.014
State	Published - 15 Jul 2004
Externally published	Yes

Bibliographical note

Funding Information:
This work has been supported by METI, Japan, as part of the Synergy Ceramics Project. Part of the work has been supported by NEDO. The authors are member of the Joint Research Consortium of Synergy Ceramics.

Keywords

Catalysis
NO reduction
Reductant
Spinel

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2004.02.014

Cite this

@article{2a179da6ebfa4ebea2884004825f4656,

title = "Synthesis and de-NOX properties of ZnO-Ga2O 3-Al2O3 spinel",

abstract = "Spinel powders with additions of Zn2+, Ni2+, Mn 2+ and Fe2+ cations into Ga2O 3-Al2O3 were synthesized by a co-precipitation method from a mixed solution of nitrate salts in the presence of aqueous ammonia. Effective reduction of NO to N2 using hydrocarbon in the presence of a high concentration of O2 can be accomplished using spinel-type catalysts. Among the catalysts tested, 30mol\% ZnO-containing Ga 2O3-Al2O3 with a pure spinel phase structure exhibited the highest catalytic activity for NO reduction. The addition of ZnO further enhanced the activity of Ga2O 3-Al2O3 over a wide temperature region. The high activity of ZnO-Ga2O3-Al2O3 was attributed to the spinel-type structure and could be qualitatively correlated with acid-base centers. Combined effect of H2O vapor and SO 2 on ZnO-Ga2O3-Al2O3 catalyst for the reduction of NO by C2H4 at 500°C was also studied.",

keywords = "Catalysis, NO reduction, Reductant, Spinel",

author = "Zahir, \{Md Hasan\} and Shingo Katayama and Masanobu Awano",

note = "Funding Information: This work has been supported by METI, Japan, as part of the Synergy Ceramics Project. Part of the work has been supported by NEDO. The authors are member of the Joint Research Consortium of Synergy Ceramics.",

year = "2004",

month = jul,

day = "15",

doi = "10.1016/j.matchemphys.2004.02.014",

language = "English",

volume = "86",

pages = "99--104",

journal = "Materials Chemistry and Physics",

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T1 - Synthesis and de-NOX properties of ZnO-Ga2O 3-Al2O3 spinel

AU - Zahir, Md Hasan

AU - Katayama, Shingo

AU - Awano, Masanobu

N1 - Funding Information: This work has been supported by METI, Japan, as part of the Synergy Ceramics Project. Part of the work has been supported by NEDO. The authors are member of the Joint Research Consortium of Synergy Ceramics.

PY - 2004/7/15

Y1 - 2004/7/15

N2 - Spinel powders with additions of Zn2+, Ni2+, Mn 2+ and Fe2+ cations into Ga2O 3-Al2O3 were synthesized by a co-precipitation method from a mixed solution of nitrate salts in the presence of aqueous ammonia. Effective reduction of NO to N2 using hydrocarbon in the presence of a high concentration of O2 can be accomplished using spinel-type catalysts. Among the catalysts tested, 30mol% ZnO-containing Ga 2O3-Al2O3 with a pure spinel phase structure exhibited the highest catalytic activity for NO reduction. The addition of ZnO further enhanced the activity of Ga2O 3-Al2O3 over a wide temperature region. The high activity of ZnO-Ga2O3-Al2O3 was attributed to the spinel-type structure and could be qualitatively correlated with acid-base centers. Combined effect of H2O vapor and SO 2 on ZnO-Ga2O3-Al2O3 catalyst for the reduction of NO by C2H4 at 500°C was also studied.

AB - Spinel powders with additions of Zn2+, Ni2+, Mn 2+ and Fe2+ cations into Ga2O 3-Al2O3 were synthesized by a co-precipitation method from a mixed solution of nitrate salts in the presence of aqueous ammonia. Effective reduction of NO to N2 using hydrocarbon in the presence of a high concentration of O2 can be accomplished using spinel-type catalysts. Among the catalysts tested, 30mol% ZnO-containing Ga 2O3-Al2O3 with a pure spinel phase structure exhibited the highest catalytic activity for NO reduction. The addition of ZnO further enhanced the activity of Ga2O 3-Al2O3 over a wide temperature region. The high activity of ZnO-Ga2O3-Al2O3 was attributed to the spinel-type structure and could be qualitatively correlated with acid-base centers. Combined effect of H2O vapor and SO 2 on ZnO-Ga2O3-Al2O3 catalyst for the reduction of NO by C2H4 at 500°C was also studied.

KW - Catalysis

KW - NO reduction

KW - Reductant

KW - Spinel

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DO - 10.1016/j.matchemphys.2004.02.014

M3 - Article

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SN - 0254-0584

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