Synthesis and de-NOx properties of ZnO-Ga2O3-Al2O3 spinel

Zahir  MH; Katayama  S; Awano  M

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Synthesis and de-NOx properties of ZnO-Ga2O3-Al2O3 spinel

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Spinel powders with additions of Zn2+, Ni2+, Mn2+ and Fe2+ cations into Ga2O3-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 N-2 using hydrocarbon in the presence of a high concentration of O-2 can be accomplished using spinel-type catalysts. Among the catalysts tested, 30 mol ZnO-containing Ga2O3-Al2O3 with a pure spinel phase structure exhibited the highest catalytic activity for NO reduction. The addition of ZnO further enhanced the activity of Ga2O3-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 SO2 on ZnO-Ga2O3-Al2O3 catalyst for the reduction of NO by C2H4 at 500 degreesC was also studied. (C) 2004 Elsevier B.V. All rights reserved.

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《Materials Chemistry and Physics》 |2004年第1期|99-104|共6页
作者
Zahir MH; Katayama S; Awano M;
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作者单位

FCRA, Synergy Ceram Lab, Moriyama Ku, Nagoya, Aichi 4638687, Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
关键词
spinel; catalysis; reductant; NO reduction; SELECTIVE CATALYTIC-REDUCTION; SOL-GEL METHOD; MAGNETIC-PROPERTIES; HYDROCARBONS; PERFORMANCE; GA2O3-AL2O3; PROPENE; OXIDE; ZINC;

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Synthesis and de-NOx properties of ZnO-Ga2O3-Al2O3 spinel

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