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Preparation and catalytic evaluation of cobalt-based monolithic and powder catalysts for Fischer-Tropsch synthesis / Robert Guettel in Industrial & engineering chemistry research, Vol. 47 N°17 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6589–6597 Titre : Preparation and catalytic evaluation of cobalt-based monolithic and powder catalysts for Fischer-Tropsch synthesis Type de document : texte imprimé Auteurs : Robert Guettel, Auteur ; Jens Knochen, Auteur ; Ulrich Kunz, Auteur Année de publication : 2008 Article en page(s) : p. 6589–6597 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Fischer-Tropsch  synthesis  Cobalt  Alumina-supported  catalysts Résumé : Cobalt-based monolithic and powder catalysts for Fischer−Tropsch synthesis were prepared. The alumina-supported catalysts contained cobalt (18.6 ± 0.9 wt %) and rhenium (1.2 ± 0.1 wt %) as active phases. To ensure the comparability of both catalysts, monolithic and powder catalysts were prepared from the same CoRe/γ-Al2O3 active powder. While the monolith was prepared by dip coating, the slurry for the coating procedure was also used for preparation of the powder catalyst. It could be shown that both catalysts have comparable composition, pore structure, Brunauer−Emmett−Teller (BET) surface area, and active metal surface area. Catalytic measurements with suspended powder catalyst in a stirred tank reactor and monolithic catalyst in a fixed-bed reactor in the slug-flow regime were performed during Fischer−Tropsch synthesis. Higher reaction rates at comparable methane selectivities were obtained with the monolithic catalyst. Estimations show that the advantageous mass-transfer characteristics of the monolithic catalyst in the slug-flow regime are responsible for this reaction rate enhancement. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800377n [article] Preparation and catalytic evaluation of cobalt-based monolithic and powder catalysts for Fischer-Tropsch synthesis [texte imprimé] / Robert Guettel, Auteur ; Jens Knochen, Auteur ; Ulrich Kunz, Auteur . - 2008 . - p. 6589–6597. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6589–6597 Mots-clés : Fischer-Tropsch  synthesis  Cobalt  Alumina-supported  catalysts Résumé : Cobalt-based monolithic and powder catalysts for Fischer−Tropsch synthesis were prepared. The alumina-supported catalysts contained cobalt (18.6 ± 0.9 wt %) and rhenium (1.2 ± 0.1 wt %) as active phases. To ensure the comparability of both catalysts, monolithic and powder catalysts were prepared from the same CoRe/γ-Al2O3 active powder. While the monolith was prepared by dip coating, the slurry for the coating procedure was also used for preparation of the powder catalyst. It could be shown that both catalysts have comparable composition, pore structure, Brunauer−Emmett−Teller (BET) surface area, and active metal surface area. Catalytic measurements with suspended powder catalyst in a stirred tank reactor and monolithic catalyst in a fixed-bed reactor in the slug-flow regime were performed during Fischer−Tropsch synthesis. Higher reaction rates at comparable methane selectivities were obtained with the monolithic catalyst. Estimations show that the advantageous mass-transfer characteristics of the monolithic catalyst in the slug-flow regime are responsible for this reaction rate enhancement. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800377n