RT info:eu-repo/semantics/article
T1 Substrates emulsification process to improve lipase-catalyzed sardine oil glycerolysis in different systems. Evaluation of lipid oxidation of the reaction products
A1 García Solaesa, Ángela
A1 Sanz Díez, Mª Teresa
A1 Melgosa Gómez, Rodrigo
A1 Beltrán Calvo, Sagrario
K1 Fish oil
K1 Glycerolysis
K1 Microemulsion
K1 SC-CO2
K1 Peroxides adsorption
K1 Chemical engineering
K1 Ingeniería química
AB Mono- and diacylglycerols rich in omega-3 have a great interest due to their good bioavailability and oxidation stability compared with other kind of omega-3 concentrates. The main drawback in mono- and diacylglycerols production by glycerolysis is the immiscibility of the substrates, oil and glycerol. To improve mass transfer rates, avoiding the use of organic solvents, emulsification of both reactants as reverse micelles (glycerol-in-oil) was carried out previous to lipase-catalyzed sardine oil glycerolysis. Substrate emulsification yielded higher reaction rates compared to kinetics with no previous emulsification, but still lower than in organic solvents. To avoid the use of organic solvent, SC-CO2 was used as reaction medium but no kinetic advantages were demonstrated in the pressure range from 15 to 25 MPa. By increasing temperature, from 40 to 90 °C, reaction rates increased both in a solvent-free system and in SC-CO2 medium. It was also found that an increase in temperature does not lead to an increase in the final oxidation status of the reaction products. This behavior was due to the adsorption capacity of the Lipozyme 435 support, giving lower oxidation status at the highest temperature, 80–90 °C.
PB Elsevier
SN 0963-9969
YR 2017
FD 2017-10
LK http://hdl.handle.net/10259/4584
UL http://hdl.handle.net/10259/4584
LA eng
NO European Regional Development Fund (ERDF) and Junta de Castilla y León [grant number BU055U16] for financial support. AGS acknowledges University of Burgos and RM MINECO [grant number BES-2013-063937] for their pre-doctoral contracts.
DS Repositorio Institucional de la Universidad de Burgos
RD 19-abr-2024