Microstructural effects on internal mass transfer of lipids in prepressed and flaked vegetable substrates

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dc.contributor.authordel Valle, JM
dc.contributor.authorGermain, JC
dc.contributor.authorUquiche, E
dc.contributor.authorZetzl, C
dc.contributor.authorBrunner, G
dc.date.accessioned2024-01-10T12:40:22Z
dc.date.available2024-01-10T12:40:22Z
dc.date.issued2006
dc.description.abstractPredictive models that describe supercritical fluid extraction (SCFE) processes would be welcomed to support its industrial application, particularly for the supercritical carbon dioxide (SC-CO2) extraction of vegetable oil from seeds subjected to common high-shear pretreatments. This work explores the application of microstructure-extractability relationships for modeling the SCFE of lipids from vegetable substrates. We measured the extraction kinetics of prepressed rapeseeds, olive husks, and flaked rosehip seeds, with SC-CO2 at 313 K and 30 MPa, and simulated the extractions using a shrinking-core model. Model parameters included the oil solubility and film mass transfer coefficient from literature correlations, and an effective diffusivity (D-e) inside the porous particles. We determined that D, could be calculated as D-12 x F, where D-12 is the diffusivity of oil in CO2, and F is a microstructural correction factor, estimated as the ratio between the final porosity (epsilon(p) from Hg porosimetry) and pore-network tortuosity (tau, from fractal-texture analysis of binary light-microscopy irnages) of the substrates. Simulations adjusted the experimental data reasonably well (5.4% < mean percent error < 15%). Additionally, best-fit estimates of D, were obtained for literature data on SC-CO2 extraction of lipids from prepressed and flaked seeds. Resulting values of F did not depend on particle size and spanned a narrow range - one order of magnitude (0.030-0.29) - as it would be expected when comparing similar systems. Although further work will be required to refine the relationship between tau and fractal parameters, or between tau and the hysteresis of Hg infiltration, this work demonstrates that is possible to develop predictive models for SCFE of solid substrates subjected to high-shear pretreatments. (c) 2005 Published by Elsevier B.V.
dc.fechaingreso.objetodigital11-04-2024
dc.format.extent13 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.supflu.2005.09.002
dc.identifier.eissn1872-8162
dc.identifier.issn0896-8446
dc.identifier.urihttps://doi.org/10.1016/j.supflu.2005.09.002
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77302
dc.identifier.wosidWOS:000236165100006
dc.information.autorucIngeniería;Del Valle J;S/I;57259
dc.issue.numero2
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final190
dc.pagina.inicio178
dc.publisherELSEVIER
dc.revistaJOURNAL OF SUPERCRITICAL FLUIDS
dc.rightsacceso restringido
dc.subjectsupercritical CO2
dc.subjectextraction
dc.subjectflaking
dc.subjectolive husk
dc.subjectrapeseed
dc.subjectrosehip seed
dc.subjectoil
dc.subjectmass transfer
dc.subjectprepressing
dc.subjectSUPERCRITICAL CO2 EXTRACTION
dc.subjectCARBON-DIOXIDE EXTRACTION
dc.subjectPARTICLE-SIZE
dc.subjectOIL
dc.subjectSOLUBILITY
dc.subjectPRETREATMENT
dc.subjectDIFFUSION
dc.subjectEXTRACTABILITY
dc.subjectSORPTION
dc.subjectSURFACE
dc.titleMicrostructural effects on internal mass transfer of lipids in prepressed and flaked vegetable substrates
dc.typeartículo
dc.volumen37
sipa.codpersvinculados57259
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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