EFECTO DE LA MODIFICACIÓN DEL SOPORTE CON GALIO Y LA PROMOCIÓN CON VANADIO EN LA HIDROSULFURACIÓN DE DIBENZOTIOFENO UTILIZANDO CATALIZADORES NiMoV-S/Al2O3-Ga2O3

Autores/as

  • Esneyder puello polo UNIVERSIDAD DEL ATLANTICO

DOI:

https://doi.org/10.15665/rp.v22i2.3441

Palabras clave:

hidrodesulfuración, galio, vanadio, método síntesis heteropolimolibdatos tipo Anderson.

Resumen

Se evaluó el efecto de modificación del soporte con galio y la promoción con vanadio en la reacción de hidrodesulfuración de dibenzotiofeno utilizando catalizadores NiMoV-S/Al2O3-Ga2O3. Los catalizadores se caracterizaron FRX, área específica BET, FT-IR, TPR y determinación de sitios ácidos. FRX mostró que la relación atómica Mo/Ni de 6.2 y 5.2 para el método 1 y 2, respectivamente.  Las isotermas adsorción-desorción establecieron la formación de materiales mesoporosos con área específicas entre 124 y 272 m2/g. FTIR mostró para todos los catalizadores la presencia de estiramientos asignables a polioxomolibdatos y los soportes modificados con galio la asignación de Ga-O-Ga y Ga-O-Al, mientras que la alúmina sin modificar presento sus señales características Al-O (AlO4 y AlO6) y O=Al-OH. TPR indicó mayor interacción metal-soporte para NiMoV-S/Al y NiMoV-S/Al-Ga-M2 relacionadas al método de modificación y la presencia de V.  Los catalizadores y soporte, presentaron acidez débil y muy débil, respectivamente. El catalizador obtenido por el método 1 fue más activo para la eliminación de DBT: NiMoV-S/Al-Ga-M2 < NiMo/Al < NiMoV-S/Al-Ga-M1 con constantes de velocidad de pseudoprimer orden globales (k) de 1.86, 2.48 y 8.50 L/(h·mol·m2), respectivamente.

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Publicado

2024-08-20