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Titolo:
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
Autore:
Zhang, CL; Li, S; Wang, LJ; Wu, TH; Peng, SY;
Indirizzi:
Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China Chinese Acad Sci Dalian Peoples R China 116023 n 116023, Peoples R China Jilin Univ, Dept Chem, Changchun 130023, Peoples R China Jilin Univ Changchun Peoples R China 130023 chun 130023, Peoples R China Chinese Acad Sci, Shanxi Inst Coal Chem, Taiyuan 030001, Peoples R China Chinese Acad Sci Taiyuan Peoples R China 030001 030001, Peoples R China
Titolo Testata:
MATERIALS CHEMISTRY AND PHYSICS
fascicolo: 1, volume: 62, anno: 2000,
pagine: 44 - 51
SICI:
0254-0584(20000114)62:1<44:SOTDOC>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
CATION-EXCESS MAGNETITE; CO2 DECOMPOSITION; COMPLETE REDUCTION; 300-DEGREES-C; REACTIVITY; FE3O4;
Keywords:
decomposition of carbon dioxide; magnetite; oxygen-deficiency; carbon; Mossbauer spectra; stability; reduction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Zhang, CL Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, POB 110,Dalian 116023, Peoples R China Chinese Acad Sci POB 110 Dalian Peoples R China 116023 R China
Citazione:
C.L. Zhang 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", MATER CH PH, 62(1), 2000, pp. 44-51

Abstract

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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/06/20 alle ore 21:39:58