Síntesis y caracterización de los sistemas ácidos WO3/ZrO2 y WO3/TiO2 aplicados en la hidratación de etileno a etanol

  • Juan Carlos Salazar Departamento de Química, Universidad del Valle
  • Mario A. Llano Escuela de Ingeniería Química, Universidad del Valle
  • Julián D. Urresta Departamento de Física, Universidad del Valle

Resumen

Este trabajo se enfoca en la síntesis y la caracterización de dos sistemas ácidos obtenidos por el método de impregnación húmeda incipiente, partiendo de una sal de tungsteno y empleando a los óxidos metálicos ZrO2 y TiO2 como soportes. Los dos sistemas de catalizadores WO3/ZrO2 y WO3/TiO2 se prepararon con cargas de tungsteno de 10, 30 y 40% en peso. Para los dos tipos de catalizadores se determinaron las densidades superficiales, transiciones de fase, estructura morfológica y estabilidad térmica para cada una de las cargas de tungsteno empleadas para preparar los catalizadores. Adicionalmente, se evaluó la actividad catalítica de estos catalizadores sólidos para la hidratación de etileno a etanol en presencia de una mezcla de fases líquida y gaseosa, empleando una relación equimolar de etileno a agua a presiones entre 30 y 40bar. Los resultados revelaron que los catalizadores que presentaron un mejor desempeño alcanzando una selectividad hacia el etanol de 98%, fueron aquellos con una carga baja de tungsteno (10% en peso) y a una presión de trabajo entre 30 y 40bar.

Palabras clave: etileno, hidratación, tungsteno, catalizadores ácidos

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Publicado
2018-05-06
Sección
Artículos