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Studies on the decomposing carbon dioxide into carbon with oxygen-deficient magnetite II. The effects of properties of magnetite on activity of decomposition CO2 and mechanism of the reaction
Zhang, CL; Li, S; Wang, LJ; Wu, TH; Peng, SY
关键词Decomposition Of Co2 Magnetite Performance Of Reduction Absorption Properties Mechanism Of Reaction Quasi-catalytic Reaction Deactivation Activation By Reduction
刊名MATERIALS CHEMISTRY AND PHYSICS
2000-01-14
62期:1页:52-61
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
关键词[WOS]TEMPERATURE PROGRAMMED DESORPTION ; CATION-EXCESS MAGNETITE ; METAL-OXIDE CATALYSTS ; COMPLETE REDUCTION
英文摘要The properties of reduction and adsorption of magnetite were investigated using temperature programming technique and thermogravimetrical (TG) analysis, and the properties of magnetite were correlated with the activity of decomposing COP into carbon. The smaller the particle size of magnetite, the larger the surface area; and the lower the activated temperature by H-2 reduction, and the faster the activated speed (the speed of lost oxygen), the greater the amount of adsorption of O-2 and CO2, i.e., the higher the activity of decomposing CO2 is. There was specific rapid adsorption of CO2 an Fe3O3-delta (delta > 0), with oxygen deficiency and this adsorption accompanied with decomposing CO2 into carbon. Fe3O4-delta transfers its electron to the carbon in CO2 therefore, CO2 decomposes into carbon. Simultaneously, Fe3O4-delta, captures the oxygen in CO2 and converts itself into stoichiometric Fe3O4; so, Fe3O4-delta is deactivated. But Fe3O4-delta could be regenerated by activating Fe3O4 by H-2 reduction. The reaction of decomposing CO2 into carbon with magnetite belongs to quasi-catalytic reactions, and is equal to one-side reaction of the reversible process of the water gas shift reaction (WGS). Decomposition of CO2 into carbon on oxygen-deficient magnetite undergoes via two steps: CO2 --> CO + O2- and CO --> C + O, the former step is the control step of the reaction speed, and the intermediate product of CO is rapidly converted further into carbon. (C) 2000 Published by Elsevier Science S.A. All rights reserved.
语种英语
WOS记录号WOS:000084492100008
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被引频次:29[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/138807
专题中国科学院大连化学物理研究所
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
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Zhang, CL,Li, S,Wang, LJ,et al. Studies on the decomposing carbon dioxide into carbon with oxygen-deficient magnetite II. The effects of properties of magnetite on activity of decomposition CO2 and mechanism of the reaction[J]. MATERIALS CHEMISTRY AND PHYSICS,2000,62(1):52-61.
APA Zhang, CL,Li, S,Wang, LJ,Wu, TH,&Peng, SY.(2000).Studies on the decomposing carbon dioxide into carbon with oxygen-deficient magnetite II. The effects of properties of magnetite on activity of decomposition CO2 and mechanism of the reaction.MATERIALS CHEMISTRY AND PHYSICS,62(1),52-61.
MLA Zhang, CL,et al."Studies on the decomposing carbon dioxide into carbon with oxygen-deficient magnetite II. The effects of properties of magnetite on activity of decomposition CO2 and mechanism of the reaction".MATERIALS CHEMISTRY AND PHYSICS 62.1(2000):52-61.
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