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题名: Studies on the decomposition of carbon dioxide into carbon with oxygen-deficient magnetite I. Preparation, characterization of magnetite, and its activity of decomposing carbon dioxide
作者: Zhang, CL;  Li, S;  Wang, LJ;  Wu, TH;  Peng, SY
关键词: decomposition of carbon dioxide ;  magnetite ;  oxygen-deficiency ;  carbon ;  Mossbauer spectra ;  stability ;  reduction
刊名: MATERIALS CHEMISTRY AND PHYSICS
发表日期: 2000-01-14
卷: 62, 期:1, 页:44-51
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Multidisciplinary
研究领域[WOS]: Materials Science
英文摘要: The magnetite Fe3O4+delta (0 less than or equal to delta less than or equal to 0.5) of different particle sizes were prepared using wet-heating oxidation method, supercritical fluid dry method and ferrous oxalate and ferric oxalate high-temperature decomposition method, and their structure were characterized by XRD, Mossbauer spectra, IR spectra and STEM. The oxygen-deficient magnetite of Fe3O4+delta (0 < delta < 1) was prepared using H-2 reduction of Fe3O4+delta (0 < delta < 0.5) at 573 K and its properties (lattice constant, magnetism, stability, and reduction ability) were studied ih detail. The activity of decomposing CO2 with oxygen-deficient magnetite of different sizes were compared and the effects of degree of oxygen-deficiency, reaction time, and temperature on the activity of the decomposing CO2 into carbon with oxygen-deficient magnetite were investigated. It is found that oxygen in the CO2 was incorporated in the form of O2- into oxygen-deficient magnetite and CO2 was reduced to carbon, at the same time Fe3O4-delta converted into stoichiometric Fe3O4. The smaller the particle size of magnetite is, the larger the oxygen-deficient degree is, the higher the reaction temperature is, and the higher the activity of decomposing CO2 is. (C) 2000 Elsevier Science S.A. All rights reserved.
关键词[WOS]: CATION-EXCESS MAGNETITE ;  CO2 DECOMPOSITION ;  COMPLETE REDUCTION ;  300-DEGREES-C ;  REACTIVITY ;  FE3O4
语种: 英语
WOS记录号: WOS:000084492100007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138687
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, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Jilin Univ, Dept Chem, Changchun 130023, Peoples R China
3.Chinese Acad Sci, Shanxi Inst Coal Chem, Taiyuan 030001, Peoples R China

Recommended Citation:
Zhang, CL,Li, S,Wang, LJ,et al. Studies on the decomposition of carbon dioxide into carbon with oxygen-deficient magnetite I. Preparation, characterization of magnetite, and its activity of decomposing carbon dioxide[J]. MATERIALS CHEMISTRY AND PHYSICS,2000,62(1):44-51.
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