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Título : Kinetic study and kinetic parameters of lipase‐catalyzed glycerolysis of sardine oil in a homogeneous medium
Autor : Garcia Solaesa, Ángela
Sanz Díez, Mª Teresa
Beltrán Calvo, Sagrario
Melgosa Gómez, Rodrigo
Publicado en: Chinese Journal of Catalysis. 2016, V. 37, n. 4, p. 596–606
Editorial : Elsevier
Fecha de publicación : abr-2016
Fecha de disponibilidad: abr-2018
ISSN : 0253-9837
Resumen : The production of polyunsaturated fatty acids (PUFAs) concentrates by enzymatic catalysis has gained interest due to their stereospecificity and the milder conditions employed compared to the use of inorganic catalysts. The enzymatic glycerolysis of sardine oil by Lipozyme 435 to get PUFA concentrates in the forms of di‐ and monoacylglycerols (DAGs, MAGs) in an optimized amount of tert‐butanol as the organic solvent was studied. First, mass transfer limitation of the reaction system was analyzed. The effects of different operating variables such as lipase loading, temperature and feed composition were investigated. A semi‐empirical kinetic model based on the reversible elementary reactions of glycerolysis and hydrolysis of the glycerides was employed to correlate the experimental kinetic data. A molar ratio glycerol:oil of 3:1 was the optimum, which produced more than 84 wt% of MAG at 323 K. A comparison with other glycerolysis systems was performed using MAG yield, reaction rate and significance of kinetic parameters.
Palabras clave: Lipase
Glycerolysis
Tert-butanol
Mass transfer
Kinetic model
URI : http://hdl.handle.net/10259/4322
Versión del editor: http://dx.doi.org/10.1016/S1872-2067(15)61040-3
Aparece en las colecciones: Artículos BIOIND

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