Experimental determination and prediction of (solid+liquid) phase equilibria for binary mixtures of heavy alkanes and fatty acids

Benziane, Mokhtar; Khimeche, Kamel; Dahmani, Abdallah; Nezar, Sawsen

doi:10.1080/00268976.2011.650229

Cited by 19 publications

(17 citation statements)

References 22 publications

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“…The predominantly monotectic behavior of this mixture was consistent with the behavior shown by binary mixtures of triacylglycerols [16] and mixtures of diacylglycerols [17] in which the difference between the melting temperatures of the system components (ΔT M ) was close to or above 20 °C. On the other hand, mixtures of n-tetracosane/stearic acid (ΔT M ≈ 19 °C) had a eutectic phase diagram and solid solutions (only one melting endotherm was evident) at mole fractions below 0.15 stearic acid [6]. From this analysis, n-alkanes in CW not only co-crystallize small fractions of long-chain fatty acids but also cause an important decrease in the melting temperature (>20 °C) of the fatty acid fraction.…”

Section: Resultsmentioning

confidence: 84%

“…This information is fundamental to understand and tailor the functionality (e.g., melting profile, organogelling capacity, and rheological properties) of this natural wax.The phase behavior of long-chain n-alkanes and fatty acids has been extensively studied, but mixtures of these compounds are largely unexplored. To the best of our knowledge only Benziane et al [6] have studied this type of mixture and observed a eutectic behavior of Abstract Candelilla wax (CW) organogelation is a promising method for providing structure to solid-like fat-based foods, cosmetics, and drug delivery systems. The main component, n-hentriacontane (C31), defines, to a large extent, the thermal properties of CW.…”

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confidence: 99%

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Phase Behavior and Structure of Systems Based on Mixtures of n‐Hentriacontane and Melissic Acid

Serrato-Palacios

Toro‐Vázquez

Dibildox‐Alvarado

et al. 2015

J Americ Oil Chem Soc

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Candelilla wax (CW) organogelation is a promising method for providing structure to solid‐like fat‐based foods, cosmetics, and drug delivery systems. The main component, n‐hentriacontane (C31), defines, to a large extent, the thermal properties of CW. CW is a complex mixture of n‐alkanes, fatty acids, triterpenic alcohols, and fatty alcohols. In this initial examination of the role of CW components on the phase behavior and structure, CW and binary mixtures of C31 and melissic acid (C30) were studied in bulk and in solutions of vegetable oil. Binary mixtures of C31 and C30 presented a predominantly monotectic phase behavior in which the melting temperature of C31 remained constant independently of the mixture composition. Crystal packing of the pure components and mixtures had an orthorhombic subcell, and the microstructures of the mixtures were extremely different from that of the pure components. In solutions with less than 50 % C31, the order–disorder transition observed in bulk C31 was absent. Organogels of C31, C30, or the mixture were softer than those of CW. The increased strength of CW organogels is associated with the relatively small crystal size of this system.

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Section: Resultsmentioning

confidence: 84%

mentioning

confidence: 99%

Phase Behavior and Structure of Systems Based on Mixtures of n‐Hentriacontane and Melissic Acid

Serrato-Palacios

Toro‐Vázquez

Dibildox‐Alvarado

et al. 2015

J Americ Oil Chem Soc

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“…The group assignments of individual compounds in the present study are listed in Table . On the basis of our previous studies , and other earlier work, we hypothesized that both models were appropriate to represent phase equilibria for biodiesel production systems and fatty acid and triglyceride or fatty acid and alkane systems.…”

Section: Resultsmentioning

confidence: 99%

“…While the SLE for the systems of components of biofuels such as fatty acids, triglycerides, and esters have been broadly studied, studies on the SLE for systems including SFAs or STGs and alkanes are not so much. − SLE data for SFA + alkane systems are available for lauric acid + hexane (C 6 H 14 ), octadecane (C 8 H 18 ), n -eicosane (C 20 H 42 ), palmitic acid + hexane, heptane (C 7 H 16 ), n -octacosane (C 28 H 58 ), and stearic acid + hexane, − heptane, , decane (C 10 H 22 ), , dodecane (C 12 H 26 ), n -tetracosane (C 24 H 50 ) . The SLE data of STG + alkane system are reported for tristearin + n -hexane .…”

Section: Introductionmentioning

confidence: 99%

Solid–Liquid Equilibria in the Binary Systems of Saturated Fatty Acids or Triglycerides (C12 to C18) + Hexadecane

et al. 2016

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Solid–liquid equilibria (SLE) for the binary systems of C12–C18 saturated fatty acids or their triglycerides + hexadecane (systems of dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acic), octadecanoic acid (stearic acid), 1,2,3-propanetriyl tridodecanoate (trilaurin), 1,2,3-propanetriyl tritetradecanoate (trimyristin), 1,2,3-propanetriyl trihexadecanoate (tripalmitin), or 1,2,3-propanetriyltrioctadecanoate (tristearin), + hexadecane) were measured in the hexadecane fractions of 0 to 1 and temperatures from (273.2 to 353.2) K, using differential scanning calorimetry. These systems were selected as model systems for blending oily content extracted from restaurant trap grease with fossil fuel oils. The obtained liquidus curves were discussed in terms of the effects of carbon chain length, chemical form, and variation in the liquid component. In addition, the experimental liquidus curves were compared with predictions based on ideal solution approximation and on the LLE-UNIFAC and Dortmund-UNIFAC models. The triglyceride and hexadecane binary systems were close to the ideal solution, while the fatty acid–hexadecane binary systems were not. The Dortmund-UNIFAC model successfully predicted all liquidus curves of the nonideal, fatty acid–hexadecane systems.

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“…This study is a continuation of research works on the thermodynamic properties of organic compounds present in diesel/biodiesel blends and phase equilibria of their mixtures [8,9]. It concerns the experimental determination and modeling of solid-liquid equilibria (LSE) of the binary system: Methyl palmitate (1) + Naphthalene (2).…”

Section: Introductionmentioning

confidence: 99%

Experimental determination and prediction of liquid-solid equilibria for binary (methyl palimitate + naphthalene) mixture

Benziane

Khimeche

Dahmani

2013

MATEC Web of Conferences

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Abstract. Solid-liquid equilibria for binary mixtures of {Methyl palmitate (1) + Naphthalene (2)} were measured using differential scanning calorimeter (DSC). Simple eutectic behaviours for this system are observed. The experimental results were correlated by means of the NRTL, Wilson, UNIQUAC and ideal models. The root-mean-square deviations of the solubility temperatures for all measured data vary from 0.5477 K (for UNIQUAC model) to 3.34K; the deviation depend on the model used. The best solubility correlation was obtained with UNIQUAC model and this observation confirms previous results.

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Experimental determination and prediction of (solid+liquid) phase equilibria for binary mixtures of heavy alkanes and fatty acids

Cited by 19 publications

References 22 publications

Phase Behavior and Structure of Systems Based on Mixtures of n‐Hentriacontane and Melissic Acid

Phase Behavior and Structure of Systems Based on Mixtures of n‐Hentriacontane and Melissic Acid

Solid–Liquid Equilibria in the Binary Systems of Saturated Fatty Acids or Triglycerides (C12 to C18) + Hexadecane

Experimental determination and prediction of liquid-solid equilibria for binary (methyl palimitate + naphthalene) mixture

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