Selectivity loss in Fischer-Tropsch synthesis : The effect of cobalt carbide formation - IFPEN - IFP Energies nouvelles Accéder directement au contenu
Article Dans Une Revue Journal of Catalysis Année : 2021

Selectivity loss in Fischer-Tropsch synthesis : The effect of cobalt carbide formation

Résumé

Fischer-Tropsch cobalt catalyst deselectivation was studied using accelerated aging treatments dedicated to the carburization phenomenon. Cobalt carbide was successfully obtained by CO treatments, with limited simultaneously carbon deposition nor sintering. Particle sizes were found to influence the catalyst sensitivity to carburization, likely because of a possible core–shell mechanism. An important loss of both activity and selectivity to heavy products was observed after the treatments, making carburization one of the potential mechanisms responsible for deselectivation in Fischer-Tropsch synthesis. Side products were also impacted by cobalt carbide formation, with an increase of CO2 production and a decrease of the selectivity to olefins. The extent of carburization was found to directly dictate the level of the selectivity shift.

Domaines

Catalyse
Fichier principal
Vignette du fichier
SelectivityLoss.pdf (2.09 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03242403 , version 1 (04-06-2021)

Identifiants

Citer

Paul Hazemann, Dominique Decottignies, Sylvie Maury, Séverine Humbert, Frédéric Meunier, et al.. Selectivity loss in Fischer-Tropsch synthesis : The effect of cobalt carbide formation. Journal of Catalysis, 2021, 397, pp.1-12. ⟨10.1016/j.jcat.2021.03.005⟩. ⟨hal-03242403⟩
88 Consultations
91 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More