Hydrogen Spillover in the Fischer-Tropsch Synthesis on Carbon-supported Cobalt Catalysts

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Katerine Soulantica (Author) Other; Amel C. Ghogia (Author) Other; Simon Cayez (Author) Other; Bruno F. Machado (Author) FEUP; Ange Nzihou (Author) Other; Philippe Serp (Author) Other; Doan Pham Minh (Author) Other

Journal

Title: ChemCatChem

Vol. 12 No. 4

Pages: 1117-1128

ISSN: 1867-3880

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 1 Citation

ISI Web of Science

Scopus - 8 Citations

Other information

Authenticus ID: P-00R-DSC

DOI: 10.1002/cctc.201901934

Abstract (EN): The Fischer-Tropsch reaction transforms syngas into high added value products, among which liquid fuels. Numerous parameters determine catalytic activity and selectivity towards the most desired hydrocarbons. The performances of cobalt-based catalysts used in the reaction are known to depend critically on Co particle size and crystallographic phase. Here, we present a comparative study of Co-based catalysts supported on three carbon supports: multi-wall carbon nanotubes, carbon nanofibers and a fibrous material. Our results show that, while the selectivity towards C5+ follows the expected tendency with respect to Co particle size, this is not the case for the TOF. These results can be rationalized considering that the amount of H-2 uptake on each catalyst increases with oxygen and defect concentration on the support. The catalyst on the support presenting many edges and oxygen surface groups, necessary for H-2 spillover, presents the highest activity. Furthermore, the hydrogen spillover contributes to the enhancement of olefin hydrogenation and methane production.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12