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Preparación sonoquímica de catalizadores de hidrodesulfurización con soporte

N A Dhas¹, A Ekhtiarzadeh, K S Suslick

¹School of Chemical Sciences, University of Illinois at Urbana-Champaign, 600 South, Mathews Avenue, Urbana, IL 61801, USA.

Journal of the American Chemical Society

|August 23, 2001

Resumen

Los métodos sonoquímicos producen catalizadores de disulfuro de molibdeno (MoS2) promovido por cobalto y níquel altamente activos en alumina para la hidrodesulfurización (HDS). Estos catalizadores de MoS2 reutilizables demuestran un rendimiento superior en la eliminación de azufre del tiofeno y el dibenzotiofeno.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
La catálisis es la catálisis.
Ingeniería Química Ingeniería Química.

Sus antecedentes:

El desarrollo de catalizadores eficientes para la hidrodesulfurización (HDS) es crucial para la refinación del petróleo.
Los catalizadores basados en disulfuro de molibdeno (MoS2) son ampliamente estudiados para aplicaciones HDS.
La síntesis sonoquímica ofrece una nueva ruta para la preparación de catalizadores.

Objetivo del estudio:

Para sintetizar Co y Ni promovió catalizadores de MoS2 en alumina utilizando métodos sonoquímicos.
Para evaluar la actividad de hidrodesulfurización de los catalizadores preparados para tiofeno y dibenzothiophene.
Caracterizar la estructura y las propiedades de los nuevos catalizadores.

Principales métodos:

Preparación sonoquímica de catalizadores mediante irradiación ultrasónica de alta intensidad.
Técnicas de caracterización que incluyen análisis elemental, XPS, SEM, TEM y XEDS.
Pruebas de actividad de hidrodesulfurización (HDS) con tiofeno y dibenzothiophene.

Principales resultados:

La síntesis sonoquímica produjo con éxito MoS2 hexagonal en capas sobre soportes de alumina.
Los catalizadores Co-Mo-S/Al2O3, Ni-Mo-S/Al2O3 y Co-Ni-Mo-S/Al2O3 exhibieron una actividad HDS extremadamente alta.
Las actividades fueron varias veces mayores que las de catalizadores comerciales comparables bajo condiciones idénticas.
La estructura en capas de MoS2 se mantuvo estable después de 120 horas de HDS, lo que indica la reutilización.

Conclusiones:

La preparación sonoquímica es un método eficaz para producir catalizadores HDS basados en MoS2 altamente activos.
Los catalizadores MoS2 promovidos muestran un potencial significativo para aplicaciones industriales en la desulfurización profunda.
Los catalizadores son estables y reutilizables, ofreciendo beneficios económicos y ambientales.

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