Effect of Different Reaction Conditions on the Deactivation of Alumina-Supported Cobalt Fischer-Tropsch Catalysts in a Milli-Fixed-Bed Reactor: Experiments and Modeling

M. Sadeqzadeh , S. Chambrey , J. P. Hong , P. Fongarland (1) , F. Luck , D. Curulla-Ferre , D. Schweich , J. Bousquet , A. Y. Khodakov

1 BIOVERT - BIOVERT

This paper focuses on the deactivation of a cobalt-based alumina-supported Fischer-Tropsch catalyst in a milli-fixed-bed reactor under different operating conditions. Different catalyst deactivation behaviors were observed at different syngas H-2/CO ratios and temperatures. The deactivation follows a two-step profile, where the initial deactivation is attributed to sintering, whereas the long-term deactivation is due to carbon deposition or cobalt oxidation on the surface. An unsteady-state semimechanistic model has been developed to represent the data at different temperatures and syngas ratios. This model takes into account cobalt sintering, coke deposition, and surface oxidation.

Domaines: Catalyse; Environnement et Société

M. Sadeqzadeh, S. Chambrey, J. P. Hong, P. Fongarland, F. Luck, et al.. Effect of Different Reaction Conditions on the Deactivation of Alumina-Supported Cobalt Fischer-Tropsch Catalysts in a Milli-Fixed-Bed Reactor: Experiments and Modeling. Industrial, 2014, 53, pp.6913-6922. ⟨10.1021/ie4040303⟩. ⟨hal-01057391⟩