Solubility of beta-carotene in ethanol- and triolein-modified CO2

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dc.contributor.authorAraus, Karina A.
dc.contributor.authorCanales, Roberto I.
dc.contributor.authordel Valle, Jose M.
dc.contributor.authorde la Fuente, Juan C.
dc.date.accessioned2024-01-10T12:42:47Z
dc.date.available2024-01-10T12:42:47Z
dc.date.issued2011
dc.description.abstractModification of an experimental device and methodology improved speed and reproducibility of measurement of solubility of beta-carotene in pure and modified SuperCritical (SC) CO2 at (313 to 333) K. Solubilities of beta-carotene in pure CO2 at (17 to 34) MPa ranged (0.17 to 1.06) mu mol/mol and agreed with values reported in literature. The solubility of beta-carotene in CO2 modified with (1.2 to 1.6) % mol ethanol increased by a factor of 1.7 to 3.0 as compared to its solubility in pure CO2 under equivalent conditions. The concentration of triolein in equilibrated ternary (CO2 + beta-carotene + triolein) mixtures having excess triolein reached values (0.01 to 0.39) mmol/mol corresponding to its solubility in pure SC CO2 under equivalent conditions. Under these conditions, the solubility of beta-carotene in triolein-modified CO2 increased by a factor of up to 4.0 in relation with its solubility in pure CO2 at comparable system temperature and pressure, reaching an uppermost value of 3.3 mu mol/mol at 333 K and 32 MPa. Unlike in the case of ethanol, where enhancements in solubility where relatively independent on system conditions, solubility enhancements using triolein as co-solvent increased markedly with system pressure, being larger than using (1.2 to 1.6)% mol ethanol at about (24 to 28) MPa, depending on system temperature. The increase in the solubility beta-carotene in SC CO2 as a result of using ethanol or triolein as co-solvent apparently does not depend on the increase in density associated with the dissolution of the co-solvent in CO2. Enhancements may be due to an increase in the polarizability of SC CO2, which possibly growths markedly as triolein dissolves in it when the system pressure becomes higher. (C) 2011 Elsevier Ltd. All rights reserved.
dc.description.funderChilean agency Fondecyt
dc.fechaingreso.objetodigital27-03-2024
dc.format.extent11 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.jct.2011.07.013
dc.identifier.eissn1096-3626
dc.identifier.issn0021-9614
dc.identifier.urihttps://doi.org/10.1016/j.jct.2011.07.013
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77541
dc.identifier.wosidWOS:000295442500030
dc.information.autorucIngeniería;Araus K;S/I;168343
dc.information.autorucIngeniería;Del Valle J;S/I;57259
dc.issue.numero12
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final2001
dc.pagina.inicio1991
dc.publisherACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
dc.revistaJOURNAL OF CHEMICAL THERMODYNAMICS
dc.rightsacceso restringido
dc.subjectSolubility
dc.subjectbeta-Carotene
dc.subjectSupercritical carbon dioxide
dc.subjectCo-solvent
dc.subjectTriolein
dc.subjectEthanol
dc.subjectCorrelation
dc.subjectSUPERCRITICAL CARBON-DIOXIDE
dc.subjectPLUS ETHANOL
dc.subjectOPTIMUM CONDITIONS
dc.subjectFLUID EXTRACTION
dc.subjectFATTY-ACIDS
dc.subjectOLEIC-ACID
dc.subjectGREEN TEA
dc.subjectOIL
dc.subjectPRESSURE
dc.subjectLYCOPENE
dc.titleSolubility of beta-carotene in ethanol- and triolein-modified CO2
dc.typeartículo
dc.volumen43
sipa.codpersvinculados168343
sipa.codpersvinculados57259
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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