Coprecipitated Iron-Containing Catalysts (Fe-Al2O3, Fe-Co-Al2O3, Fe-Ni-Al2O3) for Methane Decomposition at Moderate Temperatures: I. Genesis of Calcined and Reduced Catalysts Научная публикация
| Журнал |
Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875 |
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| Вых. Данные | Год: 2004, Том: 268, Номер: 1-2, Страницы: 127-138 Страниц : 12 DOI: 10.1016/j.apcata.2004.03.045 | ||||
| Ключевые слова | EXAFS, FTIR spectroscopy, Iron-alumina, Iron-cobalt-alumina, Iron-nickel-alumina, Radial electron density distribution, Reduction, X-ray diffraction | ||||
| Авторы |
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| Организации |
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Информация о финансировании (2)
| 1 | Netherlands Organisation for Scientific Research | |
| 2 | Civilian Research and Development Foundation | REC-008 |
Реферат:
Genesis of the composition and structure of the active component of coprecipitated iron containing catalysts (Fe-Al2O3, Fe-Co-Al2O3, Fe-Ni-Al2O3) with high metal loadings (>50 wt.%) for methane decomposition at moderate temperatures (600–650 °C) has been investigated by XRD, EXAFS, radial electron density distribution (REDD), TEM, FTIR and Mössbauer spectroscopy. The main stages of the catalyst genesis during drying, thermal decomposition and reduction have been studied. For bimetallic systems (Fe-Co-Al2O3, Fe-Ni-Al2O3) intermediate spinel phases with a composition (MII, Fe)3O4 (M=Co, Ni) have been shown to form during heat treatment and reduction. This leads to a decrease of the reduction temperature for iron oxides. Reduced bimetallic catalysts (Fe-Co-Al2O3, Fe-Ni-Al2O3) are composed of alloys. The structure and parameters of their crystal lattices depend on the type and concentration of the added metal. Alumina has been shown to behave as a structural promoter. A model of the reduced catalysts consisting of highly dispersed (20–50 nm) metal and alumina particles with a spinel phase at their interface has been suggested.
Библиографическая ссылка:
Reshetenko T.V.
, Avdeeva L.B.
, Khassin A.A.
, Kustova G.N.
, Ushakov V.A.
, Moroz E.M.
, Shmakov A.N.
, Kriventsov V.V.
, Kochubey D.I.
, Pavlyukhin Y.T.
, Chuvilin A.L.
, Ismagilov Z.R.
Coprecipitated Iron-Containing Catalysts (Fe-Al2O3, Fe-Co-Al2O3, Fe-Ni-Al2O3) for Methane Decomposition at Moderate Temperatures: I. Genesis of Calcined and Reduced Catalysts
Applied Catalysis A: General. 2004. V.268. N1-2. P.127-138. DOI: 10.1016/j.apcata.2004.03.045 WOS Scopus РИНЦ OpenAlex CAPlusCA
Coprecipitated Iron-Containing Catalysts (Fe-Al2O3, Fe-Co-Al2O3, Fe-Ni-Al2O3) for Methane Decomposition at Moderate Temperatures: I. Genesis of Calcined and Reduced Catalysts
Applied Catalysis A: General. 2004. V.268. N1-2. P.127-138. DOI: 10.1016/j.apcata.2004.03.045 WOS Scopus РИНЦ OpenAlex CAPlusCA
Даты:
| Поступила в редакцию: | 9 февр. 2004 г. |
| Принята к публикации: | 17 мар. 2004 г. |
| Опубликована online: | 18 мая 2004 г. |
| Опубликована в печати: | 10 авг. 2004 г. |
Идентификаторы БД:
| ≡ Web of science: | WOS:000222128700017 |
| ≡ Scopus: | 2-s2.0-2942564370 |
| ≡ РИНЦ: | 13449196 |
| ≡ OpenAlex: | W2112725343 |
| ≡ Chemical Abstracts: | 2004:461159 |
| ≡ Chemical Abstracts (print): | 141:91231 |