Highly active NiMo/TiO2–Al2O3 catalysts: Influence of the preparation and the activation conditions on the catalytic activity - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Applied Catalysis A : General Année : 2007

Highly active NiMo/TiO2–Al2O3 catalysts: Influence of the preparation and the activation conditions on the catalytic activity

Résumé

Abstract NiMo/TiO2–Al2O3 catalysts were prepared over a TiO2–Al2O3 mixed oxide (5% of Al2O3) by impregnation with nickel and molybdenum salts precursors at different pH solution and the catalysts have been activated by several calcination–sulfidation procedures. Evaluation of the catalysts in tetraline hydrogenation under pressure indicated that the sample obtained after impregnation under basic condition and sulfided without any previous calcination presents the highest activity. Characterizations of the samples by Raman and UV–vis diffuse reflectance spectroscopies, XPS and HRTEM allowed to follow the evolution of the Ni and Mo species along the different steps of the preparation and to understand how to get a high promoting effect of Ni over such a TiO2 rich support.

Dates et versions

hal-00175771 , version 1 (01-10-2007)

Identifiants

Citer

A. Guevara-Lara, R. Bacaud, M. Vrinat. Highly active NiMo/TiO2–Al2O3 catalysts: Influence of the preparation and the activation conditions on the catalytic activity. Applied Catalysis A : General, 2007, 328, pp.99-108. ⟨10.1016/j.apcata.2007.05.028⟩. ⟨hal-00175771⟩
124 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More