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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/6114
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dc.contributor.authorAzevedo, Álvaro Bandeira Antunes de-
dc.contributor.authorMazzafera, Paulo-
dc.contributor.authorMohamed, R. S.-
dc.contributor.authorMelo, Silvio Alexandre Beisl Vieira de-
dc.contributor.authorKieckbusch, Theo Guenter-
dc.creatorAzevedo, Álvaro Bandeira Antunes de-
dc.creatorMazzafera, Paulo-
dc.creatorMohamed, R. S.-
dc.creatorMelo, Silvio Alexandre Beisl Vieira de-
dc.creatorKieckbusch, Theo Guenter-
dc.date.accessioned2012-06-13T17:14:05Z-
dc.date.available2012-06-13T17:14:05Z-
dc.date.issued2008-
dc.identifier.issn0104-6632-
dc.identifier.urihttp://www.repositorio.ufba.br/ri/handle/ri/6114-
dc.descriptionp. 543 - 552pt_BR
dc.description.abstractThe paper reports on experimental data on the extraction of caffeine, coffee oil and chlorogenic acids from green coffee beans using pure supercritical CO2 and supercritical CO2 modified with ethanol (5% w/w) and isopropyl alcohol (5% w/w) at 50 and 60ºC and 15.2 24.8 e 35.2 MPa. In this study extraction kinetics were obtained for all assays i.e. samples were collected at several time intervals for each solvent and mixed solvent. When pure CO2 and CO2-ethanol mixed solvent were used, an increase in pressure resulted in an increase in the amount of oil extracted. When CO2 was modified with isopropyl alcohol, the amount of coffee oil extracted also increased with pressure. Caffeine extraction initially increased and subsequently decreased with pressure. Chlorogenic acids were only extracted when isopropyl alcohol was used as a co-solvent. An increase in extraction temperature resulted in a decrease of caffeine and oil extraction (retrograde condensation) when only CO2 was used as solvent. With the use of co-solvent this retrograde behavior was no longer observed and the increase in temperature resulted in the increase in the extracted amounts of caffeine, coffee oil and chlorogenic acids.pt_BR
dc.language.isoenpt_BR
dc.sourcehttp://dx.doi.org/10.1590/S0104-66322008000300012pt_BR
dc.subjectSupercritical extractionpt_BR
dc.subjectCoffeept_BR
dc.subjectCoffee oilpt_BR
dc.subjectCaffeinept_BR
dc.subjectChlorogenic acidpt_BR
dc.subjectCo-solventpt_BR
dc.titleExtraction of caffeine, chlorogenic acids and lipids from green coffee beans using supercritical carbon dioxide and co-solventspt_BR
dc.title.alternativeBrazilian Journal of Chemical Engineeringpt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 25, n. 3pt_BR
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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