Solvent-free synthesis of alumina supported ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Solvent-free synthesis of alumina supported cobalt catalysts for Fischer–Tropsch synthesis
Auteur(s) :
Mengnan, Lu [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Fatah, Nouria [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Khodakov, Andrei [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Fatah, Nouria [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Khodakov, Andrei [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Titre de la revue :
Journal of Energy Chemistry
Numéro :
25
Pagination :
1001
Date de publication :
2016
ISSN :
2095-4956
Mot(s)-clé(s) en anglais :
Mechano-synthesis
Fischer–Tropsch
Co/Al2 O3 catalyst
Fischer–Tropsch
Co/Al2 O3 catalyst
Discipline(s) HAL :
Chimie/Catalyse
Résumé en anglais : [en]
A novel mechano-synthesis method has been elaborated in this work for the design of efficient cobalt-based Fischer–Tropsch catalysts. The process aims to reduce the total number of steps involved in the synthesis of solid ...
Lire la suite >A novel mechano-synthesis method has been elaborated in this work for the design of efficient cobalt-based Fischer–Tropsch catalysts. The process aims to reduce the total number of steps involved in the synthesis of solid catalysts and thus to avoid relevant toxic solutions generated during the catalyst preparation. The mechano-synthesis of the Co/Al2O3 catalyst was processed in a low-energy vibratory micro mill and high energy planetary ball mill. Porous spherical γ-aluminas (1860 µm and 71 µm mean particle diameter) were used in this work as host compounds. Co3O4 (3 µm mean particle diameter) has provided guest particles for mechano-synthesis. The catalysts were characterized by textural (surface area, porosity and particle size) and structural analyses (X-ray diffraction, TPR, SEM-EDX and microprobe). The microprobe images show deposition of Co3O4 on the surface of the alumina and indicated no Co3O4 diffusion inside the alumina pores. SEM-EDX mapping illustrated that cobalt coating tended to occur on surface of rounded shape of cracked alumina fragments. After milling, the crystallite size of Co3O4 decreased to 15 nm from 30 to 50 nm. The TPR profiles indicated very low concentrations of inactive cobalt aluminate mixed compounds which are usually produced during the catalyst preparation by impregnation. In Fischer–Tropsch synthesis, the catalysts prepared using mechano-synthesis methods showed catalytic performance comparable to the catalysts prepared by impregnation.Lire moins >
Lire la suite >A novel mechano-synthesis method has been elaborated in this work for the design of efficient cobalt-based Fischer–Tropsch catalysts. The process aims to reduce the total number of steps involved in the synthesis of solid catalysts and thus to avoid relevant toxic solutions generated during the catalyst preparation. The mechano-synthesis of the Co/Al2O3 catalyst was processed in a low-energy vibratory micro mill and high energy planetary ball mill. Porous spherical γ-aluminas (1860 µm and 71 µm mean particle diameter) were used in this work as host compounds. Co3O4 (3 µm mean particle diameter) has provided guest particles for mechano-synthesis. The catalysts were characterized by textural (surface area, porosity and particle size) and structural analyses (X-ray diffraction, TPR, SEM-EDX and microprobe). The microprobe images show deposition of Co3O4 on the surface of the alumina and indicated no Co3O4 diffusion inside the alumina pores. SEM-EDX mapping illustrated that cobalt coating tended to occur on surface of rounded shape of cracked alumina fragments. After milling, the crystallite size of Co3O4 decreased to 15 nm from 30 to 50 nm. The TPR profiles indicated very low concentrations of inactive cobalt aluminate mixed compounds which are usually produced during the catalyst preparation by impregnation. In Fischer–Tropsch synthesis, the catalysts prepared using mechano-synthesis methods showed catalytic performance comparable to the catalysts prepared by impregnation.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Catalyse pour l’énergie (CATEN)
Date de dépôt :
2019-09-25T14:05:06Z
2019-10-17T08:17:34Z
2023-12-01T09:21:33Z
2019-10-17T08:17:34Z
2023-12-01T09:21:33Z
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