Trends and demands in the solid–liquid equilibrium of lipidic mixtures

Máximo, Guilherme J.; Costa, Mariana C.; Coutinho, João A. P.; Meirelles, Antônio J. A.

doi:10.1039/c4ra02715a

Cited by 38 publications

(28 citation statements)

References 93 publications

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“…This solid-liquid behavior sets most of the applicability of different fats and oils and several studies have been done to model the solid-liquid equilibrium in triacylglycerol systems. The solid-liquid equilibrium of fats and oils is complex and imposes several challenges to describe the multiple solid phases that can be formed (Hjorth et al, 2014;Maximo et al, 2014). Thermodynamic approaches for multicomponent mixtures can be found in the works of Won (1993), Wesdorp et al (2005) and Hjorth et al (2014).…”

Section: Introductionmentioning

confidence: 99%

Exploring amazonian fats and oils blends by computational predictions of solid fat content

Santos

Morgavi

Roux

2018

OCL

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-The Amazon region has richness of oleaginous plants that have attracted attention due to its unique properties. Integrating local communities in an economic chain of valorization of fats/oils can enhance the social dimension of local oleaginous industry sustainability. Given the large diversity of raw materials and the possibility to mix them in different proportions, an experimental effort must be done to evaluate the physical properties of such feedstocks. In this context, the development of computational tools able to estimate physical properties based on rigorous thermodynamic models can orient the experimental efforts thorough the mixtures of fats and oils most promising. The evaluation of the melting curves of nine Amazonian oils and fats is done by using thermodynamic modeling of the solid-liquid equilibrium and optimization tools. The binary blends of different raw materials were also evaluated. An average absolute error of 4.5°C was observed for the melting point and an absolute error of 3.8% was observed for the Solid Fat Content predictions over different temperatures and blends composition.Keywords: thermodynamics / optimization / solid fat content / Amazonian oils / modeling Résumé -Exploration de mélanges de graisses et d'huiles amazoniennes par prédiction informatique de la teneur en matières grasses solides. La région amazonienne est riche en plantes oléagineuses qui ont attiré l'attention en raison de leurs propriétés uniques. L'intégration des communautés locales dans une chaîne économique de valorisation des graisses / huiles peut renforcer la dimension sociale de la durabilité de l'industrie oléagineuse locale. Compte tenu de la grande diversité des matières premières et de la possibilité de les mélanger dans des proportions différentes, un effort expérimental doit être fait pour évaluer les propriétés physiques de ces matières premières. Dans ce contexte, le développement d'outils informatiques capables d'estimer les propriétés physiques à partir de modèles thermodynamiques rigoureux permet d'orienter les efforts expérimentaux sur les mélanges de graisses et d'huiles les plus prometteurs. L'évaluation des courbes de fusion de neuf huiles et graisses amazoniennes est réalisée en utilisant la modélisation thermodynamique de l'équilibre solide-liquide et des outils d'optimisation. Les mélanges binaires de différentes matières premières ont également été évaluées. Une erreur absolue moyenne de 4,5°C a été observée pour le point de fusion et une erreur absolue de 3,8 % a été observée pour les prédictions de teneur en matière grasse solide, et ce pour différentes températures et compositions de mélanges.

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Section: Introductionmentioning

confidence: 99%

Exploring amazonian fats and oils blends by computational predictions of solid fat content

Santos

Morgavi

Roux

2018

OCL

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“…The others systems of this set of data exhibit a temperature transition slightly above the eutectic one that may be related to the polymorphic transitions commonly found in fatty system. [39,40] The binary mixture equilibrium data of ethyl caprate, ethyl laurate and ethyl myristate with ethyl linoleate are presented in Table 6. Besides the predictive UNIQUAQ model it was also considered the ideal approach to both pure solid and liquid phases.…”

Section: Phase Diagrams With Unsaturated Faeesmentioning

confidence: 99%

Binary mixtures of fatty acid ethyl esters: Solid-liquid equilibrium

Boros

Batista

Coutinho

et al. 2016

Fluid Phase Equilibria

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“…These latter are promising PCM candidates. Indeed, not only do they represent more than 75% of PCMs derived from wastes or by-products of plant or animal oils, but they also have advantageous thermal properties and energy densities for a limited cost [10]. Therefore, the applicability of FA as low-cost biosourced PCMs is studied in the perspective of limiting CO 2 emissions and favoring renewable energy sources.…”

Section: Introductionmentioning

confidence: 99%

Phase Diagrams of Fatty Acids as Biosourced Phase Change Materials for Thermal Energy Storage

et al. 2019

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Featured Application: A potential application of this work consists of accelerating the screening step required for the study and selection of promising binary systems of phase change materials for thermal energy storage at medium temperature. Abstract: Thermal energy storage is known as a key element to optimize the use of renewable energies and to improve building performances. Phase change materials (PCMs) derived from wastes or by-products of plant or animal oil origins are low-cost biosourced PCMs and are composed of more than 75% of fatty acids. They present paraffin-like storage properties and melting temperatures ranging from −23 • C to 78 • C. Therefore, they could be appropriate for latent heat storage technologies for building applications. Although already studied, a more detailed exploration of this class of PCMs is still required. In this frame, a screening of fatty acids and of their related binary systems must be performed. The infrared thermography method (IRT), already used for the fast estimation of simple phase diagrams (~2 h), appears to be best suited to achieve this goal. IRT method applicability to the more complex fatty acids phase diagrams is hence studied in this work. A phase diagram comprising more than a hundred data sets was obtained for the palmitic acid-stearic acid binary system. The reliability of the results is assessed by comparison to differential scanning calorimetry (DSC) measurements or results from other standard methods presented in literature and to a solid-liquid equilibrium thermodynamic model.

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Trends and demands in the solid–liquid equilibrium of lipidic mixtures

Abstract: The increasing importance of oil chemistry in industry and academic research demands a deeper understanding of solid–liquid equilibria of lipidic systems that is still far from complete.

Cited by 38 publications

References 93 publications

Exploring amazonian fats and oils blends by computational predictions of solid fat content

Exploring amazonian fats and oils blends by computational predictions of solid fat content

Binary mixtures of fatty acid ethyl esters: Solid-liquid equilibrium

Phase Diagrams of Fatty Acids as Biosourced Phase Change Materials for Thermal Energy Storage

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