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Catalizador selectivo y estable de compuestos intermetálicos no nobles para la deshidrogenación directa de propano a

Yang He¹, Yuanjun Song¹, David A Cullen²

¹Department of Chemical and Biomolecular Engineering , University of Tennessee , Knoxville , Tennessee 37996 , United States.

Journal of the American Chemical Society

|October 23, 2018

Resumen

Un nuevo catalizador de níquel y galio en alumina muestra una alta selectividad y estabilidad para la deshidrogenación del propano en propileno. Este catalizador no noble es renovable y prometedor para aplicaciones industriales.

Área de la Ciencia:

Catálisis
Ciencias de los materiales
Ingeniería Química

Sus antecedentes:

La deshidrogenación directa del propano al propileno es crucial para la producción de polímeros.
El desarrollo de catalizadores eficientes, selectivos y estables es esencial.
Los catalizadores de metales no nobles ofrecen una alternativa rentable a los catalizadores de metales preciosos.

Objetivo del estudio:

Desarrollar un catalizador de compuestos intermetálicos no nobles para la deshidrogenación directa del propano.
Para lograr una alta selectividad, actividad, estabilidad y regenerabilidad en el proceso.
Comprender el papel de la composición del catalizador en la conversión del propano en propileno.

Principales métodos:

Síntesis de las nanopartículas de Ni3Ga con soporte de Al2O3.
Ajuste de la composición de la superficie a través de diferentes cargas de Ni y Ga.
Caracterización del rendimiento del catalizador a 600 °C.
Estudios comparativos con diferentes formulaciones de catalizadores (Ni3Ga/SiO2, NiGa/Al2O3)

Principales resultados:

Desarrollado catalizador Ni3Ga/Al2O3 con una selectividad de ~94% y 4,7 × 10^-2 s^-1 TOF.
Se ha demostrado una buena estabilidad (94% a 81% durante 82 horas) y regenerabilidad.
Se ha identificado un rango óptimo de composición superficial de Ni:Ga para la producción de propileno.
El Ni confirmado es crítico para la deshidrogenación, mientras que el Ga mejora la selectividad y la estabilidad.

Conclusiones:

El catalizador Ni3Ga/Al2O3 es muy eficaz para la deshidrogenación directa del propano.
La composición de la superficie del catalizador juega un papel clave en la optimización del rendimiento del propileno y la longevidad del catalizador.
Este catalizador no noble presenta una alternativa viable y sostenible para la síntesis industrial de propileno.

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