2014
DOI: 10.1590/0104-6632.20140312s00002600
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Experimental density data and excess molar volumes of coconut biodiesel + n-hexadecane and coconut biodiesel + diesel at different temperatures

Abstract: -The density of the pure component (n-hexadecane), pure pseudo-components (coconut biodiesel and diesel) and pseudo-binary mixtures of coconut biodiesel with n-hexadecane (or + diesel) were measured at temperatures 293.15, 313.15, 333.15, 353.15 and 373.15 K and atmospheric pressure, over the entire composition range (mole fractions from 0.1 to 0.9, with a step de 0.1). Densities were determined using an Anton Paar SVM 3000 viscodensimeter. Experimental density values decreased with the increase of the tempera… Show more

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Cited by 12 publications
(11 citation statements)
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References 14 publications
(14 reference statements)
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“…To understand the mechanism with which this occurs, one should imagine benzene dissolved in cyclohexane. According to Malek et al, the mixture benzene/cyclohexane presents positive excess molar volume at all compositions at 298.15 K. Negative excess molar volume can be attributed to strong interactions between different molecules, while positive excess results from strong interactions between similar molecules, which indicates that benzene molecules tend to interact with each other rather than with cyclohexane. As soon as DMF is added to the mixture, the phase equilibrium occurs since DMF and cyclohexane are partially miscible with each other.…”
Section: Resultsmentioning
confidence: 93%
“…To understand the mechanism with which this occurs, one should imagine benzene dissolved in cyclohexane. According to Malek et al, the mixture benzene/cyclohexane presents positive excess molar volume at all compositions at 298.15 K. Negative excess molar volume can be attributed to strong interactions between different molecules, while positive excess results from strong interactions between similar molecules, which indicates that benzene molecules tend to interact with each other rather than with cyclohexane. As soon as DMF is added to the mixture, the phase equilibrium occurs since DMF and cyclohexane are partially miscible with each other.…”
Section: Resultsmentioning
confidence: 93%
“…Essa diferença representa o excesso positivo ou negativo da função da termodinâmica de solução em relação à solução ideal. De acordo com Mesquita et al (2014), o volume molar em excesso negativo pode ser atribuído a fortes interações entre as diferentes moléculas, enquanto um excesso positivo resulta de fortes interações entre as moléculas semelhantes. Na análise da Figura 2, foi verificado que as soluções com composições molares entre 25% molar de farnesano até 35% apresentam volume molar em excesso negativo, ou seja, as interações entre moléculas diferentes são muito fortes.…”
Section: Resultsunclassified
“…Nas misturas preparadas foi usado o Farnesano como bioquerosene a fim de estudar as interações que podem surgir com o QAv. O estudo de funções derivadas como volume molar em excesso, volume molar parcial e volume molar parcial em excesso de misturas líquidas binárias é útil para entender a natureza e a intensidade das interações intermoleculares entre as moléculas dos componentes (Mesquita et al, 2014).…”
Section: Introductionunclassified