Experimental Vapor–Liquid Equilibria for the Systems {2-Ethyl-1-hexanol + Glycerol + CO<sub>2</sub>} and {2-Methyl-2-propanol + Glycerol + CO<sub>2</sub>}

Ferreira, M.O.; Ferreira-Pinto, Leandro; Souza, E. M. B. D.; Castier, Marcelo; Voll, Fernando Augusto Pedersen; Cabral, Vladimir Ferreira; Cardozo‐Filho, Lúcio

doi:10.1021/je400398e

Cited by 11 publications

(14 citation statements)

References 45 publications

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“…Phase transitions at high pressure were measured with the static synthetic method using the same variable‐volume cell apparatus (Figure ). The high‐pressure cell has an internal diameter of 18 mm and an internal volume of 25 mL.…”

Section: Methodsmentioning

confidence: 99%

“…Although oil extraction from sesame seeds by supercritical CO 2 has been reported in the literature, there is no data on phase equilibrium of sesame seed oil and CO 2 at high pressures. Knowledge of phase behaviour of this system is important for developing and optimizing supercritical extraction, reaction, and particle formation . Thus, the objective of this work was to measure phase behaviour data of CO 2 + black sesame oil at pressures up to 20 MPa, temperatures from 303–333 K, and CO 2 mass fractions from 0.12–0.4 g/g.…”

Section: Introductionmentioning

confidence: 99%

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Phase behaviour of sesame (Sesamum indicum L.) seed oil using supercritical CO₂

et al. 2016

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New experimental data were measured for phase transition of the binary system CO2 + black sesame oil. A variable volume cell was employed using the static synthetic method in a temperature range of 303–333 K, pressures up to 20 MPa, and CO2 mass fractions between 0.12–0.39 g/g. For mass fractions > 0.39, phase transition data were not measured due to pressure limitations of the high‐pressure system used. Vapour‐liquid transitions (VLE) of bubble point (BP) were determined. Phase transition data of CO2 + black sesame oil were compared to reported data from the literature involving CO2 and similar oils. The trend of the phase transition behaviour between all systems compared was similar. Phase equilibrium data obtained experimentally were successfully modelled with the Peng‐Robinson equation of state (PR‐EoS) combined with the van der Waals mixing rule (PR‐vdW2) and Wong‐Sandler mixing rule (PR‐WS).

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase behaviour of sesame (Sesamum indicum L.) seed oil using supercritical CO₂

et al. 2016

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“…Knowledge of the phase behaviour of a system is critically important for the development or optimization of any supercritical extraction, reaction, or particle formation processes . Thus, a study of the phase behaviour of the pseudo‐binary system was performed for the {Propane (1) + Moringa oleífera oil (2)} system.…”

Section: Resultsmentioning

confidence: 99%

Extraction and phase behaviour of Moringa oleifera seed oil using compressed propane

et al. 2016

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This study reports the oil extraction efficiency using Moringa oleifera seed and pressurized propane, new experimental data for phase transition of the binary system {n-propane þ Moringa oleifera oil}, and the profile of fatty acid compositions of the extracted Moringa oil. During the present study, the knowledge of the phase behaviour proved to be of great importance to optimize supercritical extraction using pressurized fluid. This project also compares the classical Soxhlet method including mathematical modelling of kinetic curves of extraction. The extraction experiments were performed in the temperature and pressure ranges of 303-333 K and 2.5-12 MPa, respectively, at a constant flow rate of 1.0 cm 3 /min of n-propane. All the conditions applied during the n-propane extraction process provided similar or higher yields (32.8 to 42.1 %) compared to extractions using n-hexane (42.6 %) and supercritical carbon dioxide (SC-CO 2 ) (37.8 %). In addition, phase transition study for the {Propane (1) þ Moringa ole ıfera oil (2)} system was performed using a variable volume cell and the static synthetic method in a temperature range of 303-343 K, pressures up to 3.23 MPa, and n-propane mass fraction between 0.2 and 0.8. Vapour-liquid (VLE), liquid-liquid (LLE), and vapourliquid-liquid (VLLE) phase transitions were observed at relatively low pressures. The fatty acid profiles of the extracted Moringa oils were evaluated using gas chromatography. They all have very close composition regardless of the solvent used and oleic acid as the major component (%76 %). The Sovov a mathematical model indicated a good fit for all the conditions investigated.

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“…The apparatus used in this work consisted of a high-pressure variable-volume cell, following the static synthetic method. Methodology and apparatus were described in previous works (Ferreira et al, 2013;Giufrida et al, 2014;Giufrida et al, 2016;Pinto et al, 2013;Zanette et al, 2014). Maximum internal volume of the equilibrium cell was 25 cm 3 , internal cell diameter was 1.8 cm and contained a movable piston.…”

Section: Apparatus and Experimental Proceduresmentioning

confidence: 99%

“…Previous work (Ferreira et al, 2013) conducted by our research group described the procedure to minimize the objective function. According to the authors, the "Solver" tool available in the Microsoft Excel (2016 version) spreadsheet for Windows and the XSEOS (Castier et al, 2008) Excel add-in were used to minimize the objective function and fit Peng-Robinson interaction parameters.…”

Section: Thermodynamic Modelingmentioning

confidence: 99%

Phase Behavior Data and Thermodynamic Modeling of the Binary System {Co2 + Coumarin} at High Pressures

Lima

Jaski

Cabral

et al. 2019

Braz. J. Chem. Eng.

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In this work, vapor-liquid (VLE) equilibrium for the binary system carbon dioxide (1) + coumarin (2) at high pressures was measured by a static synthetic method using a variable-volume view cell. Experimental data were obtained in the temperature range of 318-338 K and pressures up to 20 MPa. Coumarin molar fraction ranged from 3.0x10-3 to 6.0x10-3. Coumarin melting point reduction at high pressures was observed. The experimental results were modeled using the Peng-Robinson (PR) equation of state with van der Waals quadratic mixing rules (vdW-QMRs), providing a good representation of the experimental phase equilibrium data. Critical properties and the acentric factor were estimated using the Constantinou and Gani method, which showed to be satisfactory on the quality of data correlation. Results indicate coumarin solubility increases with increasing phase transition pressure at a given temperature.

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Experimental Vapor–Liquid Equilibria for the Systems {2-Ethyl-1-hexanol + Glycerol + CO₂} and {2-Methyl-2-propanol + Glycerol + CO₂}

Cited by 11 publications

References 45 publications

Phase behaviour of sesame (Sesamum indicum L.) seed oil using supercritical CO₂

Phase behaviour of sesame (Sesamum indicum L.) seed oil using supercritical CO₂

Extraction and phase behaviour of Moringa oleifera seed oil using compressed propane

Phase Behavior Data and Thermodynamic Modeling of the Binary System {Co2 + Coumarin} at High Pressures

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Experimental Vapor–Liquid Equilibria for the Systems {2-Ethyl-1-hexanol + Glycerol + CO2} and {2-Methyl-2-propanol + Glycerol + CO2}

Cited by 11 publications

References 45 publications

Phase behaviour of sesame (Sesamum indicum L.) seed oil using supercritical CO2

Phase behaviour of sesame (Sesamum indicum L.) seed oil using supercritical CO2

Extraction and phase behaviour of Moringa oleifera seed oil using compressed propane

Phase Behavior Data and Thermodynamic Modeling of the Binary System {Co2 + Coumarin} at High Pressures

Contact Info

Product

Resources

About

Experimental Vapor–Liquid Equilibria for the Systems {2-Ethyl-1-hexanol + Glycerol + CO₂} and {2-Methyl-2-propanol + Glycerol + CO₂}

Phase behaviour of sesame (Sesamum indicum L.) seed oil using supercritical CO₂

Phase behaviour of sesame (Sesamum indicum L.) seed oil using supercritical CO₂