Analysis by temperature-programmed reduction of the catalytic system Ni-Mo-Pd/Al2O3
Fecha
2023Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Identificador del proyecto
Impacto
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10.1016/j.fuel.2022.126789
Resumen
Alumina-supported nickel catalysts are used to facilitate many reactions at various scales. However, the deactivation
of these catalysts is an important problem that has prompted the search for solutions such as the addition
of other metals that act as promoters. In this research, the interactions that form between the support and the
metals have been studied, a fundamental property that direc ...
[++]
Alumina-supported nickel catalysts are used to facilitate many reactions at various scales. However, the deactivation
of these catalysts is an important problem that has prompted the search for solutions such as the addition
of other metals that act as promoters. In this research, the interactions that form between the support and the
metals have been studied, a fundamental property that directly affects the performance of the catalyst. With this
idea, several Ni-Pd and Ni-Mo bimetallic and various Ni-Mo-Pd trimetallic samples have been prepared, and the
reduction capacity of the oxide phases by temperatura-programmed reduction has been analyzed and studied. It
has been found that in bimetallic catalysts, Pd favors the appearance of NiO species that are more easily reducible
than Mo. In the same way, the data obtained from the trimetallic simples suggest that the impregnation order of
Mo and Pd is not a determining factor in these catalysts. In addition, it has been found that the co-impregnation
of Ni with Pd gives better results than the sequential impregnation of these metals. The results obtained have also
shown that the order of nickel impregnation is decisive. In the case of Ni-Mo catalysts, by impregnating the
molybdenum first, catalysts with better reducing properties can be obtained. [--]
Materias
Temperatura-programmed reduction,
Promoted alumina catalyst,
Nickel molybdenum catalyst,
Nickel palladium catalyst
Editor
Elsevier
Publicado en
Fuel 334 (2023) 126789
Departamento
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute for Advanced Materials and Mathematics - INAMAT2
Versión del editor
Entidades Financiadoras
The authors are grateful for financial support from the Spanish
Ministry of Science and Innovation (AEI/MINECO) and the Government
of Navarra through projects PID2020-112656RB-C21 and PC034-035
BIOGASOLANA. Open access funding provided by Universidad Pública
de Navarra. JJTH thanks Universidad Pública de Navarra for a postdoctoral
grant. AG also thanks Santander Bank for funding via the
Research Intensification Program.