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题名: Influence of Chemical States of Fe and Mn on N2O Decomposition over LaFexMnyAl12-x-yO19 Catalysts
作者: Tian Ming1, 2;  Wang Xiaodong1;  Zhu Yanyan1, 2;  Wang Junhu1;  Zhang Tao1
关键词: iron ;  manganese ;  hexaaluminate ;  nitrous oxide ;  decomposition ;  propellant ;  Mossbauer spectroscopy
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2010
DOI: 10.3724/SP.J.1088.2010.90703
卷: 31, 期:1, 页:100-105
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: LaFexMnyAl12-x-yO19 hexaaluminate catalyst samples were prepared by a coprecipitation method and tested for N2O decomposition with high concentration (30%, V/V). The catalyst samples were characterized by X-ray diffraction, scanning electron microscopy, N-2 adsorption-desorption, ultraviolet-visible spectroscopy, and Mossbauer spectroscopy. The results showed that the partial substitution by Mn led to easier formation of phase-pure hexaaluminate compared with that by Fe under the investigated conditions. Fe3+ occupied both tetrahedral sites in spinel block and trigonal bipyramid sites in mirror plane for LaFexAl12-xO19(x = 0.5, 1) hexaaluminate. Mn2+ preferentially entered tetrahedral sites at low Mn content (y = 0.5) for LaMnyAl12-yO19 hexaaluminate, whereas Mn3+ entered octahedral sites in spinel block at y = 1 The activity tests for N2O decomposition with high concentration demonstrated that Fe3+ in trigonal bipyramid sites of LaFexAl12-xO19 and Mn3+ in octahedral sites of LaMnyAl12-yO19 were the main active centers.
关键词[WOS]: SUBSTITUTED HEXAALUMINATE ;  METHANE COMBUSTION ;  PARTIAL OXIDATION ;  PERFORMANCE ;  STABILITY ;  MOSSBAUER ;  OXIDES ;  CATION ;  CH4 ;  TI
语种: 英语
WOS记录号: WOS:000274753100018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142102
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Tian Ming,Wang Xiaodong,Zhu Yanyan,et al. Influence of Chemical States of Fe and Mn on N2O Decomposition over LaFexMnyAl12-x-yO19 Catalysts[J]. CHINESE JOURNAL OF CATALYSIS,2010,31(1):100-105.
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