Vapor–liquid equilibria of carbon dioxide with linoleic acid, α-tocopherol and triolein at elevated pressures

Chen, Chia-Cheng; Chang, Chieh-Ming J.; Yang, Po

doi:10.1016/s0378-3812(00)00442-8

Cited by 41 publications

(22 citation statements)

References 7 publications

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“…The solubility of each heavy compound in the vapor phase increases with increasing pressure, which also increases the K values (distribution coefficients). This fact was also reported by Chen et al (2000).…”

Section: Resultssupporting

confidence: 84%

“…Pressure (bar) Chen et al (2000) this work Pressure (bar) Yin et al (1992) this work Bharath et al (1992) 40.00 80.00 120.00 160.00 200.00 240.00 P (bar) …”

Section: Resultsmentioning

confidence: 88%

“…Figure 5: Equilibrium curve for the binary system CO 2 -C16, at 40, 60 and 80ºC Because of the different operational conditions studied for the binary systems, the better system to compare the experimental data is CO 2 -linoleic acid (C18:2), from the work of Chen et al (2000), presented in Figures 10 and 11, for the temperatures of 313.15K and 333.15K. The results from Chen et al (2000) show a good agreement with those obtained in this work, confirming the experimental methodology adopted.…”

Section: Resultsmentioning

confidence: 99%

“…In 1993, Bharath et al studied the behavior of the system CO 2 -palmitic acid at 80 and 100ºC at pressures from 130 to 305 bars. Chen et al (2000) measured liquid-vapor equilibrium data for the system CO 2 -linoleic acid in the range of 40 to 60ºC at pressures up to 241.2 bars. At constant density, the solubility increases with increasing temperature.…”

Section: Literature Reviewmentioning

confidence: 99%

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Phase equilibria of oleic, palmitic, stearic, linoleic and linolenic acids in supercritical CO2

Penedo

Coelho

Mendes

2009

Braz. J. Chem. Eng.

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-The knowledge of the phase equilibrium is one of the most important factors to study the design of separation processes controlled by the equilibrium. Fatty acids are present in high concentration as byproducts in vegetable oils but the equilibrium data involving these components is scarce. The objective of this work is the experimental determination of the liquid-vapor equilibrium of five binary different systems formed by carbon dioxide and palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2) and linolenic acid (C18:3). The equilibrium experimental data was collected at 40, 60 and 80ºC at 60, 90 and 120 bar, at the extract and raffinate phases, using an experimental apparatus containing an extractor, a gas cylinder and pressure and temperature controllers. The data was modeled using the cubic equation of state of Peng-Robinson with the mixing rule of van der Waals with binary interaction parameters. The model was adequate to treat the experimental data at each temperature and at all the temperatures together. The best model that includes the van der Waals mixing rule with two parameters has maximum deviation of 17%. The distribution coefficients were also analyzed and it was concluded that the fractionation of the fatty acids is possible using supercritical carbon dioxide.

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Section: Resultssupporting

confidence: 84%

“…Pressure (bar) Chen et al (2000) this work Pressure (bar) Yin et al (1992) this work Bharath et al (1992) 40.00 80.00 120.00 160.00 200.00 240.00 P (bar) …”

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

See 2 more Smart Citations

Phase equilibria of oleic, palmitic, stearic, linoleic and linolenic acids in supercritical CO2

Penedo

Coelho

Mendes

2009

Braz. J. Chem. Eng.

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show abstract

“…Chrastil [2] published the first set of data on solubility of ␣-tocopherol in supercritical CO 2 , followed by Ohgaki et al [3], Zehnder et al [4], and Johannsen and Brunner [5]. Liquid-vapour equilibrium compositions in wide ranges of temperature and pressure were measured by Pereira et al [6], Meier et al [7], Moser et al [8], Chen et al [9] and, very recently, Škerget et al [10].…”

Section: Introductionmentioning

confidence: 99%