Titre :

Enhancing the hydrodesulfurization of 4,6-dimethyldibenzothiophene through the use of mixed mows2 phase evidenced by haadf

Auteur(s) :

Nikul'shina, M. S. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Samara State University [SSAU]
Mozhaev, A. V. [Auteur]
Samara State University [SSAU]
Lancelot, Christine [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Blanchard, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Marinova, Maya [Auteur]
Institut Chevreul - FR2638
Lamonier, Carole [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Nikul'shin, P. A. [Auteur]
Samara State University [SSAU]

Titre de la revue :

Catalysis Today

Nom court de la revue :

Catal. Today

Numéro :

329

Pagination :

24-34

Éditeur :

0920-5861

Date de publication :

2019-06-01

ISSN :

0920-5861

Mot(s)-clé(s) en anglais :

4
6-DMDBT
Heteropolyanion
Hydrodesulfurization
MoW catalysts
DBT
Hydrogenation

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

MoW alumina supported hydrotreating (HDT) catalysts were synthesized by using mixed SiMonW12-n heteropolyacids (HPAs) and also from a mixture of SiMo12 and SiW12 HPAs with the same Mo/W ratios for reference. Gas phase ...
Lire la suite >MoW alumina supported hydrotreating (HDT) catalysts were synthesized by using mixed SiMonW12-n heteropolyacids (HPAs) and also from a mixture of SiMo12 and SiW12 HPAs with the same Mo/W ratios for reference. Gas phase sulfidation of the catalysts prepared from mixed MoW HPAs led to the formation of a mixed phase evidenced by high-angle annular dark-field (HAADF) images, where a core of Mo atoms was surrounded by W atoms. Contrariwise, most of MoS2 or WS2 slabs were observed in the solids prepared from a mixture of the HPAs. This mixed phase induced higher hydrodesulfurization (HDS) of DBT, as well as hydrogenation (HYD) of naphthalene, than it was observed in the case of the reference catalysts. Comparison of activation procedures (gas phase versus liquid phase) confirmed that sulfidation in gas phase led to more efficient catalysts, even in the case of the formation of the mixed slabs. Beneficial effect of the mixed MoWS phase was even more pronounced in the case of the HDS of a more refractory molecule, 4,6-dimethyldibenzothiophene (4,6-DMDBT), which was attributed to the more hydrogenating properties of this mixed phase.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Autre(s) projet(s) ou source(s) de financement :

Ministry of Education and Science of the Russian Federation, project No. 14.586.21.0054 (unique identifier of project RFMEFI58617X0054)
Ministry of Foreign Affairs and International Development
Ministry of National Education, Higher Education and Research (France) in framework of PHC Kolmogorov Programme 2017-2019
Chevreul Institute (FR 2638)
Ministère de l’Enseignement Supérieur et de la Recherche
Région Nord – Pas de Calais
FEDER

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 :

Catalyse pour l’énergie et la synthèse de molécules plateforme (CEMOP)

Date de dépôt :

2022-03-02T07:13:48Z
2024-01-16T09:13:26Z
2024-02-20T08:50:23Z