Phase equilibrium study for the separation and fractionation of fatty oil components using supercritical carbon dioxide

Bharath, Ragunath; Inomata, Hiroshi; Adschiri, Tadafumi; Arai, Kunio

doi:10.1016/0378-3812(92)85159-6

Cited by 108 publications

(83 citation statements)

References 4 publications

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“…This can be observed in Figure 12. Although the deviation was higher between the data, the experimental data of this work had a lower deviation compared to Bharath et al (1992).…”

Section: Resultscontrasting

confidence: 55%

“…These data can also be observed for the oleic and linoleic acids at 40 and 60ºC for pressures up to 300 bar (Zou et al, 1990). Bharath et al (1992) also measured the phase equilibrium data for the system CO 2 -oleic acid at 40, 60 and 80ºC for pressures between 100 and 300 bars. 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.…”

Section: Literature Reviewmentioning

confidence: 67%

“…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: 92%

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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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“…This can be observed in Figure 12. Although the deviation was higher between the data, the experimental data of this work had a lower deviation compared to Bharath et al (1992).…”

Section: Resultscontrasting

confidence: 55%

Section: Literature Reviewmentioning

confidence: 67%

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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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“…This is quite reasonable to expect due to the different equipments and procedures employed in the experimental determinations, which can produce systematic differences between the data reported. For example, in the case of the CO 2 þ oleic acid mixture at 313 K, the R 2 values obtained considering separately the different sources of solubility data available [14][15][16] were quite satisfactory but when merging all the experimental data available a quite poorer regression resulted (R 2 ¼ 0.826). Figure 3 shows that this result should be attributed to the high discrepancies found between the experimental data reported at 313 K and not to a failure of Eq.…”

mentioning

confidence: 79%

“…3 to correlate the CO 2 solubility data. Actually, considering the same system (CO 2 þ oleic acid) and the same sources of experimental data [14][15][16] but a different temperature (333 K), the R 2 values obtained were higher than 0.950 considering separately each source of solubility data or merging the data all together in the regression procedure (see Table 3). …”

mentioning

confidence: 90%

Correlating the solubility of supercritical gases in high‐molecular weight substances using a density‐dependent equation

2011

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in Wiley Online Library (wileyonlinelibrary.com).Chrastil (1982) established that the solubility of a substance in a supercritical fluid can be correlated with the density of the pure supercritical gas. Recently, the solubility of supercritical fluids in different organic liquids was successfully correlated as a function solely of the supercritical fluid density, since we demonstrated that the supercritical fluid density also defines the solubility of the gas in the liquid phase. In this work, the solubility of supercritical carbon dioxide in high-molecular weight substances, such as high-molecular weight paraffins, alcohols, fatty acids, fatty acid methyl and ethyl esters, has been correlated and constants provided. More than 20 binary systems comprising around 1000 solubility data points were correlated, obtaining regression coefficients greater than 0.96 and confirming the goodness of the density-dependent equation previously reported. V V C 2010 American Institute of Chemical Engineers AIChE J, 57: [765][766][767][768][769][770][771] 2011

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References

2021

Modeling, Simulation, and Optimization of Supercritical and Subcritical Fluid Extraction Processes

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Phase equilibrium study for the separation and fractionation of fatty oil components using supercritical carbon dioxide

Cited by 108 publications

References 4 publications

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

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

Correlating the solubility of supercritical gases in high‐molecular weight substances using a density‐dependent equation

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