Titre :

Hydrogen production by the steam reforming of ethanol over cobalt catalysts supported on different carbon nanostructures

Auteur(s) :

Lobato, Bruno [Auteur]
Ribeiro, Mauro Celso [Auteur]
Aires, Francisco J. Cadete Santos [Auteur]
Da Silva, Victor Teixeira [Auteur]
Bellot Noronha, Fabio [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Titre de la revue :

Catalysis Today

Nom court de la revue :

Catal. Today

Numéro :

344

Pagination :

66-74

Date de publication :

2020-03-15

ISSN :

0920-5861

Mot(s)-clé(s) en anglais :

Carbon nanofibers
Cobalt catalysts
Steam reforming of ethanol
Carbon nanotubes
Hydrogen production

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

In this work, we studied the performance of Co catalysts supported on different carbonaceous structures (activated carbon, carbon nanofibers and carbon nanotubes) for the steam reforming of ethanol at 773 K. Co supported ...
Lire la suite >In this work, we studied the performance of Co catalysts supported on different carbonaceous structures (activated carbon, carbon nanofibers and carbon nanotubes) for the steam reforming of ethanol at 773 K. Co supported on activated carbon and carbon nanofiber exhibited the smallest Co particle size and the highest activity. All catalysts deactivated but the loss of activity depended on the carbon structure. Co/C and Co/CNT catalysts significantly deactivated, while only a slight decrease in activity was observed for Co/CNF. TG analysis did not detect the formation of carbon deposits. In situ XANES and EXAFS showed that Co was partially oxidized after reduction at 623 K and the catalyst was further reduced during reaction, which rules out the oxidation of the metallic particles as the reason for catalyst deactivation. TEM of the fresh and spent catalyst showed a significant growth of the particles for Co/C and Co/CNT, indicating that sintering is the main cause of catalyst deactivation. Co/CNF only slightly deactivated because Co sintering extent was low.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Valorisation des alcanes et de la biomasse (VAALBIO)

Date de dépôt :

2022-03-02T07:14:29Z