Title :

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

Author(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]

Journal title :

Catalysis Today

Abbreviated title :

Catal. Today

Volume number :

329

Pages :

24-34

Publisher :

0920-5861

Publication date :

2019-06-01

ISSN :

0920-5861

English keyword(s) :

4
6-DMDBT
Heteropolyanion
Hydrodesulfurization
MoW catalysts
DBT
Hydrogenation

HAL domain(s) :

Chimie/Catalyse

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Other project(s) or funding source(s) :

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

Administrative institution(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

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

Research team(s) :

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

Submission date :

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