Transesterificación de aceite de canola con Sr/CaO mediante el método Box-Behnken
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Dada la necesidad de nuevos materiales catalíticos para la transesterificación de aceites para la generación de biodiesel, el objetivo de este trabajo fue optimizar esta reacción usando catalizadores de Sr/CaO obtenidos a partir de cascarón de huevo mediante el estudio del efecto de la cantidad de estroncio, temperatura de calcinación y el método Box-Behnken. Se prepararon catalizadores de Sr/CaO con 3, 6 y 9 %p/p de Sr por calcinación a 500, 650 y 800 °C usando el método de impregnación húmeda de Sr(NO3)2 disuelto en metanol. Se encontró que, al aumentar la cantidad de Sr y la temperatura de calcinación de todas las series, también lo hace el rendimiento de biodiesel. Esto se debe a que con alta concentración de Sr y temperatura de calcinación se generan más sitios activos superficiales. Asimismo, se observó que se formarían especies SrCO3 las cuales limitarían el rendimiento del catalizador. Considerando los resultados, el catalizador con 9 %p/p de Sr calcinado a 800 °C fue el más activo y usado en la optimización. Para esto se utilizó el método Box-Behnken tomando como factores la relación molar metanol/aceite, la temperatura y el tiempo usando 8 %p/p de catalizador respecto al aceite. Se encontró que el rendimiento óptimo fue del 90.81% con una relación metanol/aceite = 10, 68.58 °C por 2 h.
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Mundo Nano. Revista Interdisciplinaria en Nanociencias y Nanotecnología, editada por la Universidad Nacional Autónoma de México, se distribuye bajo una Licencia Creative Commons Atribución-NoComercial 4.0 Internacional.
Basada en una obra en http://www.mundonano.unam.mx.
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