Solubilities of Triolein in Supercritical CO2

Ribeiro, M. Albertina; Bernardo‐Gil, M. Gabriela

doi:10.1021/je00022a006

Cited by 21 publications

(8 citation statements)

References 9 publications

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“…The expected linear relationship between ln(solubility) and ln(density) has been observed for fatty acids, ,, triglycerides, , and fatty acid ethyl esters , by others; however, the temperature dependence of k has not been well established. Both parallel and nonparallel isotherms have been reported for pure lipids.…”

Section: Solubility Data and Correlationmentioning

confidence: 82%

Correlating the Solubility Behavior of Fatty Acids, Mono-, Di-, and Triglycerides, and Fatty Acid Esters in Supercritical Carbon Dioxide

and

Temelli

2000

Ind. Eng. Chem. Res.

130

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The knowledge of the solubility behavior of different lipid classes in supercritical carbon dioxide (SCCO2) is of great importance in the design of SCCO2 fractionation, extraction, and reaction processes. Solubility data from the literature for binary mixtures of SCCO2 and pure lipids (fatty acids, mono-, di-, and triglycerides, and fatty acid esters) were correlated using Chrastil's equation to determine the effect of compound properties (molecular weight and polarity) and operating conditions (density of CO2, pressure, and temperature) on the solubility behavior. The physical state of the lipid solute had a significant effect on model parameters and, hence, the solubility behavior. An isothermal increase in the pressure and a temperature increase at constant CO2 density led to an increase in solubility for all the compounds studied. Retrograde solubility behavior was observed for liquid solutes, whereas the solid solutes were in the nonretrograde region under the examined conditions. In a homologous series, solubility decreased with an increase in the molecular weight and polarity. The effect of solute properties on solubility was observed to be dependent on operating conditions. The solubility behaviors of pure lipid classes outlined in this study are intended to provide the basis for further study of complex multicomponent lipid mixtures in supercritical processes.

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Section: Solubility Data and Correlationmentioning

confidence: 82%

Correlating the Solubility Behavior of Fatty Acids, Mono-, Di-, and Triglycerides, and Fatty Acid Esters in Supercritical Carbon Dioxide

and

Temelli

2000

Ind. Eng. Chem. Res.

130

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“…Experimental solubility data were collected from literature (1,(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) for the following systems: lauric acid (C12), myristic acid (C14), palmitic acid (C16), stearic acid (C18), oleic acid (C18:1), linoleic acid (C18:2), methyl myristate (mC14), methyl palmitate (mC16), methyl stearate (mC18), methyl oleate (mC18:1), ethyl stearate (eC18), ethyl oleate (eC18:1), ethyl linoleate (eC18:2), ethyl eicosapentanoate (EPA), ethyl docosahexanoate (DHA), triolein (OOO), tristearin (SSS), tripalmitin (PPP), and trilinolein (LLL). All the experimental data were written in terms of the mass fraction Y (kg solute/kg CO 2 ).…”

Section: Methodsmentioning

confidence: 99%

A new method for estimating solubility of fatty acids, esters, and triglycerides in supercritical carbon dioxide

Vasconcellos

Cabral

2001

J Americ Oil Chem Soc

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A method to predict solubility of fat compounds (fatty acids, fatty acid esters, and triglycerides) in supercritical CO2 in the absence of experimental data is presented. The method is based on the idea of group contribution, so only knowledge about the chemical structure of the substance is needed to predict its solubility in CO2. Chrastil's equation was used to correlate the solubilities of fatty acids, fatty acid esters, and triglycerides in CO2. The three parameters determined from fitting of the data were calculated. A nonlinear fit routine was used to determine the chemical group contributions to the three parameters. Analysis of the results shows that it is possible to correlate the parameters of Chrastil's equation to molecular groups. The average deviation from the experimental data was 8%.

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“…Several studies report the phase behavior of systems involving triacylglycerols, fatty acids and carbon dioxide [11][12][13][14][15][16][17][18][19]. These studies showed that triacylglycerols and fatty acids are poorly soluble in CO 2 , due to its non-polarity.…”

Section: Introductionmentioning

confidence: 99%