Titre :

Hydrodeoxygenation of m-cresol over Pd/Al-SBA-15 catalysts: Effect of Al content on the deoxygenation reaction pathways

Auteur(s) :

Teles, Camila [Auteur]
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
Ciotonea, Carmen [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Chimie Environnementale et Interactions sur le Vivant [UCEIV]
Gomes, Nicolas. [Auteur]
Gonçalves, Vinicius O.O. [Auteur]
Ungureanu, Adrian [Auteur]
"Gheorghe Asachi" Technical University of Iasi [TUIASI]
Catrinescu, Cezar [Auteur]
"Gheorghe Asachi" Technical University of Iasi [TUIASI]
Marinova, Maya [Auteur]
Institut Chevreul - FR2638
Clacens, Jean-Marc [Auteur]
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
royer, sebastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bellot Noronha, Fabio [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Richard, Frédéric [Auteur]
Institut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]

Titre de la revue :

Applied Catalysis A : General

Numéro :

641

Éditeur :

Elsevier

Date de publication :

2022

ISSN :

0926-860X

Mot(s)-clé(s) en anglais :

HDO M-cresol Palladium
SBA-15
aluminium
acidity

Discipline(s) HAL :

Chimie/Chimie organique
Chimie/Catalyse

Résumé en anglais : [en]

The effect of aluminium content (x = 5, 20 and 40 wt %) in SBA-15 type silica supports used to obtain Pd/xAl-SBA-15 catalysts was evaluated in the HDO reaction of m-cresol at 300 ◦C, under atmospheric and high (30 bar) ...
Lire la suite >The effect of aluminium content (x = 5, 20 and 40 wt %) in SBA-15 type silica supports used to obtain Pd/xAl-SBA-15 catalysts was evaluated in the HDO reaction of m-cresol at 300 ◦C, under atmospheric and high (30 bar) pressure. Aluminium incorporation was performed using the two-step pH-adjustment method, affording the deposition of Al phases over silica previously precipitated. Pd was thereafter deposed using incipient wetnessimpregnation. Physico-chemical properties of the catalysts were investigated by XRD, N2 physisorption, H2 chemisorption, DRIFTS of adsorbed pyridine, STEM-EDX mapping coupled to HAADF imaging. The acidity (Brønsted and Lewis sites) generated by the incorporation of aluminium at low content (i.e. 5 wt %) onto the SBA-15 structure resulted in the improvement of HDO of m-cresol, with an increase in selectivity toward thedeoxygenated products, toluene under atmospheric pressure (38 % for the Pd/SBA vs. 77 % for the Pd/Al5-SBA) and methylcyclohexane under high pressure (14 % for the Pd/SBA vs. 30 % for Pd/Al5-SBA). The selectivity into methylcyclohexanone was also affected by the total pressure: 5 % under atmospheric pressure vs 64 % under 30 bar over Pd/Al5-SBA). However, under atmospheric pressure, at higher Al contents, side reactions catalyzed by acid sites were promoted, such as isomerization and disproportionation reactions, which were not observed under high pressure. Besides that, the increase of quantity of Al leaded to the decrease of the surface accessibility and hence drop on the reactions rate over both pressure conditions. This work demonstrated the efficiency of Pd catalyst in HDO reaction which can be obtained by a precise adjustment of the quantity of Al in the SBA catalyticsupport.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet ANR :

ULNE

Établissement(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

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

Équipe(s) de recherche :

Matériaux pour la catalyse (MATCAT)
Valorisation des alcanes et de la biomasse (VAALBIO)

Date de dépôt :

2023-10-23T10:47:56Z