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Cobalt fischer − tropsch catalysts using nickel promoter as a rhenium substitute to suppress deactivation / Erling Rytter in Industrial & engineering chemistry research, Vol. 49 N° 9 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 9 (Mai 2010) . - pp. 4140–4148 Titre : Cobalt fischer − tropsch catalysts using nickel promoter as a rhenium substitute to suppress deactivation Type de document : texte imprimé Auteurs : Erling Rytter, Auteur ; Torild H. Skagseth, Auteur ; Sigrid Eri, Auteur Année de publication : 2010 Article en page(s) : pp. 4140–4148 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalysts Résumé : Catalysts with cobalt as the Fischer−Tropsch (FT) metal and nickel and/or rhenium as promoters on alumina of different pore sizes, a stabilized alumina, silica, or titania as supports were investigated for activity, selectivity, and deactivation up to 800 h of operation in a fixed-bed reactor. From the observed selectivities, there is no indication that nickel as a promoter with a loading up to 5 wt % influences the selectivities to higher hydrocarbons for low-temperature (<250 °C) cobalt FT synthesis. Nickel is found to have a profound impact on the catalytic activity, and the start of run activity, steady-state level, and deactivation rate are influenced. The freshly reduced catalyst is nearly inactive, but the activity increases rapidly to a stable level which is significantly higher than for catalysts without nickel. It appears that nickel can substitute rhenium as a reduction and activity promoter. The steady-state activity is maintained constant for a prolonged time, but expected deactivation commences after ca. 150 h time on stream. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100308f [article] Cobalt fischer − tropsch catalysts using nickel promoter as a rhenium substitute to suppress deactivation [texte imprimé] / Erling Rytter, Auteur ; Torild H. Skagseth, Auteur ; Sigrid Eri, Auteur . - 2010 . - pp. 4140–4148. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 9 (Mai 2010) . - pp. 4140–4148 Mots-clés : Catalysts Résumé : Catalysts with cobalt as the Fischer−Tropsch (FT) metal and nickel and/or rhenium as promoters on alumina of different pore sizes, a stabilized alumina, silica, or titania as supports were investigated for activity, selectivity, and deactivation up to 800 h of operation in a fixed-bed reactor. From the observed selectivities, there is no indication that nickel as a promoter with a loading up to 5 wt % influences the selectivities to higher hydrocarbons for low-temperature (<250 °C) cobalt FT synthesis. Nickel is found to have a profound impact on the catalytic activity, and the start of run activity, steady-state level, and deactivation rate are influenced. The freshly reduced catalyst is nearly inactive, but the activity increases rapidly to a stable level which is significantly higher than for catalysts without nickel. It appears that nickel can substitute rhenium as a reduction and activity promoter. The steady-state activity is maintained constant for a prolonged time, but expected deactivation commences after ca. 150 h time on stream. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100308f