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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2020

Autores

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

Revista

Título: ChemCatChem

Vol. 12 Nº 4

Páginas: 1117-1128

ISSN: 1867-3880

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 1 Citação

ISI Web of Science

Scopus - 8 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12