2024-03-29T13:48:25Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/43222022-04-29T12:02:46Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245
2018-04-01T02:45:06Z
urn:hdl:10259/4322
Kinetic study and kinetic parameters of lipase‐catalyzed glycerolysis of sardine oil in a homogeneous medium
García Solaesa, Ángela
Sanz Díez, Mª Teresa
Beltrán Calvo, Sagrario
Melgosa Gómez, Rodrigo
Lipase
Glycerolysis
Tert-butanol
Mass transfer
Kinetic model
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.
2017-02-02T11:31:31Z
2018-04-01T02:45:06Z
2016-04
info:eu-repo/semantics/article
0253-9837
http://hdl.handle.net/10259/4322
eng
Chinese Journal of Catalysis. 2016, V. 37, n. 4, p. 596–606
http://dx.doi.org/10.1016/S1872-2067(15)61040-3
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Elsevier