Titre :

Mixed oxides supported low-nickel formulations for the direct amination of aliphatic alcohols with ammonia

Auteur(s) :

Tomer, Ajay [Auteur]
Yan, Zhen [Auteur]
Ponchel, Anne [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Pera-Titus, Marc [Auteur]

Titre de la revue :

Journal of Catalysis

Numéro :

356

Pagination :

133-146

Date de publication :

2017-12

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

The present study focuses on the selective synthesis of primary amines from aliphatic alcohols and ammonia using alumina-ceria supported nickel formulations based on very low nickel loading (≤2 wt%) and without any additive ...
Lire la suite >The present study focuses on the selective synthesis of primary amines from aliphatic alcohols and ammonia using alumina-ceria supported nickel formulations based on very low nickel loading (≤2 wt%) and without any additive or external H2 supply. The effect of the catalyst preparation methods and modes of nickel impregnation were studied in detail and comprehensively characterized. The best formulation afforded 80% n-octanol conversion with 78% selectivity to n-octylamine at optimized reaction conditions, which were far better than control catalysts and benchmark Ni-alumina formulations relying on high Ni loadings. The enhanced activities of the alumina-ceria supported nickel catalysts was attributed to three combined effects: (1) a higher reducibility of surface nickel oxide species, (2) the genesis of very small and homogeneously distributed nickel nanoparticles (2–3 nm), and (3) a strong decline in the formation of nickel aluminates. Furthermore, unlike benchmark Ni catalysts, these formulations afforded a higher resistance to leaching.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

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

Équipe(s) de recherche :

Catalyse et chimie supramoléculaire (CASU)

Date de dépôt :

2019-09-25T14:05:54Z