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El disolvente ajusta la selectividad de la reacción de hidrogenación sobre el catalizador α-MoC

  • 0Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT , Peking University , Beijing 100871 , P. R. China.
Journal of the American Chemical Society +

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24 de octubre de 2018

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24 de octubre de 2018

Ver abstracta en PubMed

Resumen

Este resumen es generado por máquina.

Los catalizadores de molibdeno activan selectivamente los enlaces en el furfural derivado de la biomasa para una mejora sostenible. La elección del disolvente influye dramáticamente en la formación del producto, permitiendo altos rendimientos de alcohol furfurílico o 2-metil furano.

Área De La Ciencia

  • Catálisis
  • Ciencias de los materiales
  • Química ecológica

Sus Antecedentes

  • La activación selectiva de enlaces en los oxigenados de biomasa es clave para la mejora sostenible.
  • Los carburos y nitritos de molibdeno son prometedores para la conversión de biomasa.

Objetivo Del Estudio

  • Investigar la activación selectiva del enlace en la hidrogenación con furfural utilizando catalizadores de molibdeno.
  • Explorar el papel de los disolventes en el control de la selectividad del producto.

Principales Métodos

  • Hidrogenación en fase líquida de furfural biológicamente derivado con carburo de molibdeno y nitruro de catalizadores.
  • Evaluaciones experimentales y teóricas de los efectos del disolvente en la catálisis.
  • Caracterización de la actividad y la selectividad del catalizador.

Principales Resultados

  • Los carburos y nitritos de molibdeno activan preferentemente los enlaces CO y C-OH.
  • El α-MoC de fase pura exhibió una actividad más alta que el β-Mo2C y el γ-Mo2N.
  • Selección del disolvente (por ejemplo, metanol, 2-butanol) selectividad controlada hacia el alcohol furfurílico o el 2-metil furano (> 90% de rendimiento).

Conclusiones

  • La capacidad de donación de hidrógeno por el disolvente rige las velocidades de reacción.
  • La adsorción de disolventes en los catalizadores modifica las propiedades de la superficie, controlando la selectividad a través del obstáculo estérico.
  • La modificación de la superficie inducida por disolventes ofrece una estrategia para la hidrodeoxigenación selectiva de la biomasa.

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