Title :

W-SBA based materials as efficient catalysts for the ODS of model and real feeds: Improvement of their lifetime through active phase encapsulation

Author(s) :

Estephane, G. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lancelot, Christine [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Blanchard, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Dufaud, V. [Auteur]
Université Claude Bernard Lyon 1 [UCBL]
Chambrey, Stephane [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Toufaily, Joumana [Auteur]
Rafik Hariri University [RHU]
Hamiye, T. [Auteur]
Rafik Hariri University [RHU]
Lamonier, Carole [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Journal title :

Applied Catalysis A. General

Volume number :

571

Pages :

42-50

Publication date :

2019

English keyword(s) :

Oxidative desulfurization
Phosphotungstic acid
Incorporation
DBT
SRGO

HAL domain(s) :

Chimie/Catalyse

English abstract : [en]

Incorporated W-SBA based catalysts were prepared by a direct synthesis method involving phosphotungstic acic (HPW) together with mixed structure directing agents, and by incipient wetness impregnation for comparison purpose. ...
Show more >Incorporated W-SBA based catalysts were prepared by a direct synthesis method involving phosphotungstic acic (HPW) together with mixed structure directing agents, and by incipient wetness impregnation for comparison purpose. In the oxidative desulfurization CODS) of dibenzothiophene (DBT, 500-1500 ppmS) and of a Straight Run Gas Oil (SRGO, 2000 ppmS) in batch reactor, the impregnated solids showed higher efficiency than the incorporated ones, which was attributed to a better accessibility of the active phase present at the surface of the support in the impregnated catalysts. However, in continuous evaluation using a fixed bed reactor, the incorporated catalyst showed a stable conversion in the ODS of SRGO 2000 ppmS for 9 days while within 24 h the impregnated solid was almost completely deactivated. Higher interaction of the active phase with the support in incorporated catalysts was evidenced by Time-of-Flight Secondary Ions Mass Spectrometry (ToF-SIMS) analysis, which can be at the origin of less leaching of tungsten species during reaction and thus explain their better resistance towards deactivation. The lower efficiency of incorporated catalysts compared to impregnated ones in ODS reaction carried out in a batch reactor is clearly compensated by their resistance towards leaching of the active phase in a continuous test. These results highlight the importance of evaluating not only the catalysts performance but also their lifetime in conditions more representative of industrial ones.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
Université de Lille
CNRS
Centrale Lille
Univ. Artois

Collections :

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

Research team(s) :

Catalyse pour l’énergie (CATEN)

Submission date :

2019-09-25T15:07:02Z
2020-10-22T13:08:21Z