Study of the phase equilibrium formed inside the flash tank used at the separation step of a supercritical fluid extraction unit

In the present work the influence of a non-ideal separation step of a supercritical fluid extraction (SFE) unit was studied; the solvent used was carbon dioxide. The behavior of clove bud ( Eugenia caryophyllus), vetiver grass ( Vetiveria zizanioides), and fennel ( Foeniculum vulgare) was analyzed....

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Published inThe Journal of supercritical fluids Vol. 43; no. 3; pp. 447 - 459
Main Authors Takeuchi, Thais M., Leal, Patrícia F., Favareto, Rogério, Cardozo-Filho, Lúcio, Corazza, Marcos L., Rosa, Paulo T.V., Meireles, M. Angela A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2008
Subjects
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ISSN0896-8446
1872-8162
DOI10.1016/j.supflu.2007.08.002

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Abstract In the present work the influence of a non-ideal separation step of a supercritical fluid extraction (SFE) unit was studied; the solvent used was carbon dioxide. The behavior of clove bud ( Eugenia caryophyllus), vetiver grass ( Vetiveria zizanioides), and fennel ( Foeniculum vulgare) was analyzed. The starting point was a previous study on the same subject, which considered that no solute is lost in the vapor phase and a fixed fraction of 2% of the CO 2 is lost within the heavy phase. The flash separation step was simulated using the SuperPro Designs 6.0 ® Software, which calculates the phase equilibrium that occurs during the separation step using the Peng–Robinson equation of state. Experimental data for extraction kinetics from vetiver grass were obtained at 313 K and 20 MPa. Phase equilibria for CO 2/vetiver extract were measured at pressures from 7.5 to 30 MPa and temperatures of 303.2, 318.2 and 333.2 K; CO 2 weight fraction varied from 0.1 to 0.99. The flash tank experimental data was obtained for fennel at 4 MPa and 293 K; the resulting anethole loss was 1.45%. The costs of manufacturing (COM) of the SFE extracts were determined according to Turton et al. using Tecanalysis v 1.0; the influence of the non-ideal flash separation step on COM was studied for clove buds.
AbstractList In the present work the influence of a non-ideal separation step of a supercritical fluid extraction (SFE) unit was studied; the solvent used was carbon dioxide. The behavior of clove bud ( Eugenia caryophyllus), vetiver grass ( Vetiveria zizanioides), and fennel ( Foeniculum vulgare) was analyzed. The starting point was a previous study on the same subject, which considered that no solute is lost in the vapor phase and a fixed fraction of 2% of the CO 2 is lost within the heavy phase. The flash separation step was simulated using the SuperPro Designs 6.0 ® Software, which calculates the phase equilibrium that occurs during the separation step using the Peng–Robinson equation of state. Experimental data for extraction kinetics from vetiver grass were obtained at 313 K and 20 MPa. Phase equilibria for CO 2/vetiver extract were measured at pressures from 7.5 to 30 MPa and temperatures of 303.2, 318.2 and 333.2 K; CO 2 weight fraction varied from 0.1 to 0.99. The flash tank experimental data was obtained for fennel at 4 MPa and 293 K; the resulting anethole loss was 1.45%. The costs of manufacturing (COM) of the SFE extracts were determined according to Turton et al. using Tecanalysis v 1.0; the influence of the non-ideal flash separation step on COM was studied for clove buds.
Author Favareto, Rogério
Corazza, Marcos L.
Leal, Patrícia F.
Cardozo-Filho, Lúcio
Takeuchi, Thais M.
Rosa, Paulo T.V.
Meireles, M. Angela A.
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  givenname: Marcos L.
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  givenname: M. Angela A.
  surname: Meireles
  fullname: Meireles, M. Angela A.
  email: meireles@fea.unicamp.br
  organization: LASEFI-DEA/FEA (College of Food Engineering), UNICAMP (State University of Campinas), Cx. Postal 6121, 13083-862 Campinas, São Paulo, Brazil
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Issue 3
Keywords Fennel
Vetiver
Phase equilibrium
Supercritical fluid extraction
Clove
Separation step
Language English
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Snippet In the present work the influence of a non-ideal separation step of a supercritical fluid extraction (SFE) unit was studied; the solvent used was carbon...
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SubjectTerms Clove
Fennel
Phase equilibrium
Separation step
Supercritical fluid extraction
Vetiver
Title Study of the phase equilibrium formed inside the flash tank used at the separation step of a supercritical fluid extraction unit
URI https://dx.doi.org/10.1016/j.supflu.2007.08.002
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