Liquid-liquid equilibrium of systems containing triolein + (fatty acid/ partial acylglycerols/ester) + ethanol: Experimental data and UNIFAC modeling

Ferreira, Marcela C.; Bessa, Larissa C.B.A.; Abreu, Charlles R. A.; Meirelles, Antônio J. A.; Batista, Eduardo Augusto Caldas

doi:10.1016/j.fluid.2018.07.030

Cited by 9 publications

(2 citation statements)

References 24 publications

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“…Thermodynamic modeling can be used to predict or correlate the experimental behavior of fatty acid systems described through LLE data. The approach using excess Gibbs energy models is widely applied to describe biodiesel and vegetable oil systems through thermodynamic models, such as NRTL [18][19][20][21][22], UNIQUAC [18,[22][23][24], and UNIFAC [25][26][27][28]. Although thermodynamic models, such as UNIQUAC and NRTL, are capable of accurately representing the experimental data, both are restricted to the specificity of the type of vegetable oil used, as the phase equilibrium parameters are adjusted solely for the system described in the experimental data used for the LLE data fitting.…”

Section: Introductionmentioning

confidence: 99%

Ethanol as a Subgroup of the UNIFAC Model in the Prediction of Liquid-Liquid Equilibrium in Food and Fuel Systems

M. Ortega Bacicheti,

D. Machado,

Nishiyama

et al. 2023

Ethanol and Glycerol Chemistry - Production, Modelling, Applications, and Technological Aspects

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Ethanol has been employed as a solvent in biodiesel production and vegetable oil refining since it is more economically attractive and less toxic than methanol and hexane. Furthermore, ethanol has demonstrated easy recovery, good selectivity, and distribution coefficient for free fatty acids (FFA), which is the primary target in the refining process since high acidity oil can lead to the formation of side products. As the knowledge of phase equilibrium behavior of fatty systems is essential to design and optimize the extraction of FFA, this chapter will present two new UNIFAC subgroups for ethanol: EtOH-B, focused on biodiesel production; and EtOH-D, focused on the deacidification process. Except for ethanol and water subgroups fitted in this study, all remaining UNIFAC parameters were taken from the literature. The new EtOH-B and EtOH-D parameters provide a considerably lower mean square error (1.20% and 0.87%) than the other works available in the literature. The results show that new ethanol subgroups and the developed methodology are valuable tools in predicting liquid-liquid phase equilibrium for ethyl biodiesel and vegetable oil deacidification systems considered, resulting in reduced computational calculations and a relatively small split with the complex dataset established by the UNIFAC-LL model.

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Section: Introductionmentioning

confidence: 99%

Ethanol as a Subgroup of the UNIFAC Model in the Prediction of Liquid-Liquid Equilibrium in Food and Fuel Systems

M. Ortega Bacicheti,

D. Machado,

Nishiyama

et al. 2023

Ethanol and Glycerol Chemistry - Production, Modelling, Applications, and Technological Aspects

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“…Liquid–liquid extraction laboratory experiments of the vegetable oils with polar solvents have been performed (Ferreira, Bessa, Abreu, Meirelles, & Caldas Batista, 2018; Gonçalves et al, 2016; Homrich et al, 2017). However, pilot scale apparatus to liquid–liquid refining has not yet been extensively studied and, in this way may present novelties for this area of study.…”

Section: Introductionmentioning

confidence: 99%

Improving quality of refined canola oil byliquid–liquidextraction on pilot scale apparatus

Tiritan

Tonial

Dalmolin

et al. 2020

J Food Process Engineering

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The aim of this work was to refine expeller‐pressed crude canola oil by pilot scale liquid–liquid extraction with hydrated ethanol as solvent. Quality indices were determined, and shelf life was estimated in the accelerated test. The scale projection was performed based on the results of the pilot scale. The experimental device operates in a batch process with 89.6% yield deacidification and an average of 4.4 contacts per assay. In this process, without bleaching and deodorization steps, physicochemical parameters were according to the Codex Alimentarius standards, except moisture. In this way, it will be necessary to apply nonthermal techniques to remove water. The major fatty acids identified were oleic and linoleic acid and the absence of trans fatty acids. For the shelf life, the refined oil presented free fatty acids 0.28% and peroxide value 12.65 meq O2 kg−1 after 24 hr at 65°C. The pilot scale results showed that the technique is suitable to produce edible oils. A liquid–liquid extractor was designed for industrial scale with the total volume will be 12,000 L. To process 6 tons of crude canola oil per day, the unit will be able to produce 1.3 thousand tons per year of refined canola oil. Practical applications After acid degumming, canola oil was submitted to liquid–liquid extraction, using ethanol as solvent. As a result, two traditional steps of refining vegetable oils have been eliminated: bleaching and deodorization. This fact directly impacts on physical space of industry, maintenance of equipment and need for operators. Trans fats were not detected in canola oil, pointing that the technique is efficient in the production of healthier oils, with less environmental impact.

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Deacidification of Amazonian Pracaxi (Pentaclethra macroloba) and Patawa (Oenocarpus bataua) oils: experimental and modeling of liquid–liquid extraction using alcoholic solvents

Pereira

Ferreira

et al. 2020

Braz. J. Chem. Eng.

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Liquid-liquid equilibrium of systems containing triolein + (fatty acid/ partial acylglycerols/ester) + ethanol: Experimental data and UNIFAC modeling

Cited by 9 publications

References 24 publications

Ethanol as a Subgroup of the UNIFAC Model in the Prediction of Liquid-Liquid Equilibrium in Food and Fuel Systems

Ethanol as a Subgroup of the UNIFAC Model in the Prediction of Liquid-Liquid Equilibrium in Food and Fuel Systems

Improving quality of refined canola oil byliquid–liquidextraction on pilot scale apparatus

Deacidification of Amazonian Pracaxi (Pentaclethra macroloba) and Patawa (Oenocarpus bataua) oils: experimental and modeling of liquid–liquid extraction using alcoholic solvents

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