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Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption

Microalgae contain valuable biologically active lipophilic substances such as omega-3 fatty acids and carotenoids. In contrast to the recovery of vegetable oils from seeds, where the extraction with supercritical CO(2) is used as a mild and selective method, economically viable application of this m...

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Autores principales: Sovová, Helena, Nobre, Beatriz P., Palavra, António
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456766/
https://www.ncbi.nlm.nih.gov/pubmed/28773546
http://dx.doi.org/10.3390/ma9060423
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author Sovová, Helena
Nobre, Beatriz P.
Palavra, António
author_facet Sovová, Helena
Nobre, Beatriz P.
Palavra, António
author_sort Sovová, Helena
collection PubMed
description Microalgae contain valuable biologically active lipophilic substances such as omega-3 fatty acids and carotenoids. In contrast to the recovery of vegetable oils from seeds, where the extraction with supercritical CO(2) is used as a mild and selective method, economically viable application of this method on similarly soluble oils from microalgae requires, in most cases, much higher pressure. This paper presents and verifies hypothesis that this difference is caused by high adsorption capacity of microalgae. Under the pressures usually applied in supercritical fluid extraction from plants, microalgae bind a large fraction of the extracted oil, while under extremely high CO(2) pressures their adsorption capacity diminishes and the extraction rate depends on oil solubility in supercritical CO(2). A mathematical model for the extraction from microalgae was derived and applied to literature data on the extraction kinetics in order to determine model parameters.
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spelling pubmed-54567662017-07-28 Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption Sovová, Helena Nobre, Beatriz P. Palavra, António Materials (Basel) Article Microalgae contain valuable biologically active lipophilic substances such as omega-3 fatty acids and carotenoids. In contrast to the recovery of vegetable oils from seeds, where the extraction with supercritical CO(2) is used as a mild and selective method, economically viable application of this method on similarly soluble oils from microalgae requires, in most cases, much higher pressure. This paper presents and verifies hypothesis that this difference is caused by high adsorption capacity of microalgae. Under the pressures usually applied in supercritical fluid extraction from plants, microalgae bind a large fraction of the extracted oil, while under extremely high CO(2) pressures their adsorption capacity diminishes and the extraction rate depends on oil solubility in supercritical CO(2). A mathematical model for the extraction from microalgae was derived and applied to literature data on the extraction kinetics in order to determine model parameters. MDPI 2016-05-27 /pmc/articles/PMC5456766/ /pubmed/28773546 http://dx.doi.org/10.3390/ma9060423 Text en © 2016 by the authors; Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sovová, Helena
Nobre, Beatriz P.
Palavra, António
Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption
title Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption
title_full Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption
title_fullStr Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption
title_full_unstemmed Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption
title_short Modeling of the Kinetics of Supercritical Fluid Extraction of Lipids from Microalgae with Emphasis on Extract Desorption
title_sort modeling of the kinetics of supercritical fluid extraction of lipids from microalgae with emphasis on extract desorption
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456766/
https://www.ncbi.nlm.nih.gov/pubmed/28773546
http://dx.doi.org/10.3390/ma9060423
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