HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Effect of reduction on Co catalyst active phase highlighted by an original approach coupling ASAXS and electron tomography

Abstract : Diversification of liquid fuel sources for transportation plays a key role in the energetic transition. High quality and clean diesels can be produced by Fischer-Tropsch synthesis, which interest is renewed in as much it can be performed from syngas (CO+H 2) produced by conversion of natural gas or gasification of lignocellulosic biomass, leading, in this latter case, to fuels from renewable resource. Catalytic performance (activity and selectivity) of cobalt-based catalysts are related to the physico-chemical characteristics of the cobalt nanoparticles. The present study propose a new approach to obtain a detailed and exhaustive description of the cobalt active phase in FT catalysts. We combined Anomalous Small Xray Scattering (ASAXS) and electron tomography, giving complementary insights on the microstructure and size distribution of both cobalt nanoparticles and aggregates. This approach, carried out on a cobalt/alumina-silica catalysts studied first at the oxide state and then at the reduced state, allowed to highlight the mechanisms involved at the nanoscale during the reduction step. Reduction impact is significant on aggregates morphology, causing their fragmentation and increasing their accessibility. As a perspective, a better knowledge of cobalt aggregates morphology will help to understand their impact on the catalyst performance.
Document type :
Journal articles
Complete list of metadata

Cited literature [68 references]  Display  Hide  Download

Contributor : Catherine Belli Connect in order to contact the contributor
Submitted on : Monday, January 14, 2019 - 2:39:31 PM
Last modification on : Monday, January 10, 2022 - 10:16:07 AM


Effect of Reduction on Co Cata...
Files produced by the author(s)



S. Humbert, G. Desjouis, T. Bizien, L. Lemaitre, Ahmed Taleb, et al.. Effect of reduction on Co catalyst active phase highlighted by an original approach coupling ASAXS and electron tomography. Journal of Catalysis, Elsevier, 2018, 366, pp.202-212. ⟨10.1016/j.jcat.2018.07.024⟩. ⟨hal-01980505⟩



Record views


Files downloads