Textural Characterisation of Iron-Promoted Raney Nickel Catalysts Synthesised by Mechanical Alloying
Mesoporous binary Al x Ni y and ternary Al x Ni y Fe z Raney-type catalysts were synthesised by a two-step procedure involving two main processes, i.e. (i) mechanical metal alloying and (ii) alkaline aluminium leaching. Pure metallic powders of Al, Ni and Fe (if required) were first mechanically all...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2001-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617011494637 |
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| author | J. Salmones B. Zeifert J.G. Cabañas-Moreno G. Aguilar-Rios F. Rojas A.J. Ramirez-Cuesta |
| author_facet | J. Salmones B. Zeifert J.G. Cabañas-Moreno G. Aguilar-Rios F. Rojas A.J. Ramirez-Cuesta |
| author_sort | J. Salmones |
| collection | DOAJ |
| description | Mesoporous binary Al x Ni y and ternary Al x Ni y Fe z Raney-type catalysts were synthesised by a two-step procedure involving two main processes, i.e. (i) mechanical metal alloying and (ii) alkaline aluminium leaching. Pure metallic powders of Al, Ni and Fe (if required) were first mechanically alloyed in an attrition mill and then subjected to KOH leaching to selectively remove part of the aluminium atoms. After a slow drying process, a fine, nanostructured slit-shaped material was obtained. Substrate characterisation involved studies by atomic absorption (AA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXS) in the SEM and nitrogen physisorption. An intermetallic β- or B2-(AlNi) phase with a metastable bcc crystalline structure was formed as a non-equilibrium phase after the metal alloying process. Because of aluminium removal, the β-(AlNi) phase was transformed into the more stable nickel fcc structure. In this work, some important physico-chemical properties of binary (Al–Ni) and ternary (Al–Ni–Fe) catalysts, with especial attention to textural properties adduced from nitrogen physisorption, are presented and discussed. |
| format | Article |
| id | doaj-art-475e9414139a403695203809980f6209 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2001-12-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-475e9414139a403695203809980f62092025-01-02T22:37:24ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382001-12-011910.1260/0263617011494637Textural Characterisation of Iron-Promoted Raney Nickel Catalysts Synthesised by Mechanical AlloyingJ. Salmones0B. Zeifert1J.G. Cabañas-Moreno2G. Aguilar-Rios3F. Rojas4A.J. Ramirez-Cuesta5 Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, México, D.F. 07730, Mexico Instituto Politécnico Nacional, Apdo. Postal 75-373, México D.F. 07300, México Instituto Politécnico Nacional, Apdo. Postal 75-373, México D.F. 07300, México Instituto Politécnico Nacional, Apdo. Postal 75-373, México D.F. 07300, México Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, P.O. Box 55-534, México D.F. 09340, México Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K.Mesoporous binary Al x Ni y and ternary Al x Ni y Fe z Raney-type catalysts were synthesised by a two-step procedure involving two main processes, i.e. (i) mechanical metal alloying and (ii) alkaline aluminium leaching. Pure metallic powders of Al, Ni and Fe (if required) were first mechanically alloyed in an attrition mill and then subjected to KOH leaching to selectively remove part of the aluminium atoms. After a slow drying process, a fine, nanostructured slit-shaped material was obtained. Substrate characterisation involved studies by atomic absorption (AA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXS) in the SEM and nitrogen physisorption. An intermetallic β- or B2-(AlNi) phase with a metastable bcc crystalline structure was formed as a non-equilibrium phase after the metal alloying process. Because of aluminium removal, the β-(AlNi) phase was transformed into the more stable nickel fcc structure. In this work, some important physico-chemical properties of binary (Al–Ni) and ternary (Al–Ni–Fe) catalysts, with especial attention to textural properties adduced from nitrogen physisorption, are presented and discussed.https://doi.org/10.1260/0263617011494637 |
| spellingShingle | J. Salmones B. Zeifert J.G. Cabañas-Moreno G. Aguilar-Rios F. Rojas A.J. Ramirez-Cuesta Textural Characterisation of Iron-Promoted Raney Nickel Catalysts Synthesised by Mechanical Alloying Adsorption Science & Technology |
| title | Textural Characterisation of Iron-Promoted Raney Nickel Catalysts Synthesised by Mechanical Alloying |
| title_full | Textural Characterisation of Iron-Promoted Raney Nickel Catalysts Synthesised by Mechanical Alloying |
| title_fullStr | Textural Characterisation of Iron-Promoted Raney Nickel Catalysts Synthesised by Mechanical Alloying |
| title_full_unstemmed | Textural Characterisation of Iron-Promoted Raney Nickel Catalysts Synthesised by Mechanical Alloying |
| title_short | Textural Characterisation of Iron-Promoted Raney Nickel Catalysts Synthesised by Mechanical Alloying |
| title_sort | textural characterisation of iron promoted raney nickel catalysts synthesised by mechanical alloying |
| url | https://doi.org/10.1260/0263617011494637 |
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