Producción enzimática de ésteres etílicos del aceite de ricino

Autores/as

  • Claudia Delgado Universidad Nacional de Colombia
  • Vaselina Pashova Universidad Nacional de Colombia

DOI:

https://doi.org/10.17533/udea.redin.14004

Palabras clave:

biodiesel, transesterificación, lipasa, mecanismo Ping-Pong Bi Bi, aceite de ricino

Resumen

Se estudió la síntesis de biodiesel mediante la transesterificación de aceite de ricino con etanol, usando n-hexano como solvente y una lipasa comercial Lipozyme TL IM como biocatalizador. Se investigó el efecto de la relación molar etanol:aceite (3:1-10:1), temperatura de reacción (35-65ºC), carga enzimática (5-20 % p/p) y cantidad de agua (0-10 % p/p). La máxima conversión de biodiesel (etil-ésteres) se obtuvo a una temperatura de 35ºC, una relación molar etanol a aceite de 5:1, una carga enzimática inicial de 15 % p/p y una concentración inicial de agua de 2% p/p, ambos con base en el peso aceite de ricino. Para describir la cinética enzimática de la transesterificación del aceite de ricino con etanol se propuso un modelo simplificado, basado en el mecanismo Ping- Pong Bi Bi con inhibición competitiva por el alcohol. Los parámetros cinéticos del modelo se estimaron gráfica y paramétricamente; a bajas concentraciones de etanol (40-80 mol Kg-1) se encontró una buena aproximación entre los resultados predichos por el modelo y los datos experimentales.
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Publicado

2012-12-14

Cómo citar

Delgado, C., & Pashova, V. (2012). Producción enzimática de ésteres etílicos del aceite de ricino. Revista Facultad De Ingeniería Universidad De Antioquia, (53), 9–19. https://doi.org/10.17533/udea.redin.14004

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