Mechanical Alloying: an Alternative Method to Produce NiMoW HDS Catalysts
DOI:
https://doi.org/10.29356/jmcs.v65i1.1277Keywords:
Alloys, mechanical alloying, hydrodesulfurization, catalystsAbstract
Abstract. In this work, quaternary alloys of Ni-Mo-W-Al were prepared by mechanical alloying. In addition, a process of chemical extraction by alkaline leaching was applied to remove aluminum in order to increase the specific surface area (SSA) and to generate porous materials, which were tested in the dibenzothiophene (DBT) hydrodesulfurization (HDS) reaction to determine their catalytic activity and selectivity. This study reveals the impact of the surface and structural modification of quaternary alloys on the catalyst performance and serves as well, as guidance for the design of novel HDS catalysts.
Resumen. En este trabajo, se prepararon mediante aleado mecánico aleaciones cuaternarias de Ni-Mo-W-Al. Adicionalmente, un proceso de extracción química mediante lixiviación alcalina se aplicó para eliminar aluminio con la finalidad de incrementar el área específica y generar materiales porosos, los cuales fueron activados y evaluados en la reacción de hidrodesulfuración (HDS) de dibenzotiofeno (DBT) para determinar su actividad catalítica y selectividad. Este estudio revela el impacto de la modificación estructural y superficial de las aleaciones cuaternarias sobre el comportamiento de los catalizadores y sirve como guía, además, para el diseño de nuevos catalizadores para HDS.
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