Natural convection retards supercritical CO(2) extraction of essential oils and lipids from vegetable substrates

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dc.contributor.authorGermain, JC
dc.contributor.authordel Valle, JM
dc.contributor.authorde la Fuente, JC
dc.date.accessioned2024-01-10T12:40:45Z
dc.date.available2024-01-10T12:40:45Z
dc.date.issued2005
dc.description.abstractExternal mass-transfer coefficients (k(f)) during supercritical fluid extraction (SCFE) of high-solubility solutes, under solvent upflow conditions and low superficial velocities, can be small because of the negative influence of natural convection phenomena. A shrinking-core model for mass transfer was used to estimate best-fit values of k(f) for data on SCFE of lipids from prepressed rapeseeds. Values of k(f) at a high Reynolds number (Re = 14.1) were similar when using solvent upflow or downflow, but k(f) at lower Re (1.57) was 3.6 times smaller when using solvent upflow than that predicted from a literature correlation for downflow conditions. These k(f)'s are consistent with values estimated by fitting literature data, or gathered from various sources under similar, nonadequate conditions (solvent upflow under low Re) for the extraction of both fatty and essential oils. Care is advisable when employing best-fit values of k(f) from laboratory data for process design purposes, especially when sizing of the solvent pumps for the experiments is questionable.
dc.fechaingreso.objetodigital2024-04-23
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1021/ie049119x
dc.identifier.issn0888-5885
dc.identifier.urihttps://doi.org/10.1021/ie049119x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77345
dc.identifier.wosidWOS:000228233200049
dc.information.autorucIngeniería;Del Valle J;S/I;57259
dc.issue.numero8
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final2886
dc.pagina.inicio2879
dc.publisherAMER CHEMICAL SOC
dc.revistaINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
dc.rightsacceso restringido
dc.subjectNEAR-CRITICAL FLUIDS
dc.subjectCARBON-DIOXIDE
dc.subjectMASS-TRANSFER
dc.subjectPHASE-EQUILIBRIA
dc.subjectPACKED-BEDS
dc.subjectSOLUBILITY
dc.subjectSEEDS
dc.subjectKINETICS
dc.subjectLIMONENE
dc.subjectMODEL
dc.titleNatural convection retards supercritical CO(2) extraction of essential oils and lipids from vegetable substrates
dc.typeartículo
dc.volumen44
sipa.codpersvinculados57259
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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