Experimental and correlational study of isobaric molar heat capacities of fatty acid esters: Ethyl nonanoate and ethyl dodecanoate

Liu, Xiang Yang; Zhu, Chenyang; Yang, Feng; Su, Chao; He, Maogang

doi:10.1016/j.fluid.2018.09.017

Cited by 24 publications

(19 citation statements)

References 29 publications

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“…The final relative expanded uncertainty of C p was estimated to be 1.28% (k = 2), and the specific calculation process of it can be found in the Supporting Information. More details of the experimental method and the calorimeter can be referred to our previous works 30,31 and Supporting Information, respectively. According to this method, the heat capacity is given by the following relation 32…”

Section: Methodsmentioning

confidence: 99%

Experimental Study on Isobaric Molar Heat Capacities of a Deep Eutectic Solvent: Choline Chloride + Ethylene Glycol

et al. 2020

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In this study, a flow calorimeter is used to measure the isobaric molar heat capacities (C p ) of one deep eutectic solvent (DES) containing choline chloride and ethylene glycol at different molar ratios. The experiment is performed at temperatures from 313 to 343 K and pressures up to 25 MPa, while the expanded uncertainties of temperature, pressure, molar fraction, and C p are estimated to be lower than 0.02 K, 5.0 kPa, 1.4 × 10 −4 , and 1.28%, respectively. The results show that C p change linearly with temperature, while it is almost constant with a variety of pressure. A quadratic relation between C p and molar fraction of ethylene glycol is observed, which shows a decreasing tendency with the increase of molar fraction. A correlation for the C p of the chosen DES and pure ethylene glycol is proposed for a better application of the data.

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Section: Methodsmentioning

confidence: 99%

Experimental Study on Isobaric Molar Heat Capacities of a Deep Eutectic Solvent: Choline Chloride + Ethylene Glycol

et al. 2020

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“…The isobaric heat capacities in the investigated temperature range at atmospheric pressure needed to initiate the computation procedure were measured by Liu et al and were correlated by where b l are the fitting parameters, which are listed in Table . The simultaneous step-by-step integration was started with the initial values c ( T ), ρ( T ), and c p ( T ) at reference pressure p 0 = 0.1 MPa.…”

Section: Resultsmentioning

confidence: 99%

“…The density reported by Perkin 28 is extremely lower than other density data because of the large uncertainty of the magnetic rotary method used by Perkin. 28 The isobaric heat capacities in the investigated temperature range at atmospheric pressure needed to initiate the computation procedure were measured by Liu et al 29 and were correlated by…”

Section: Resultsmentioning

confidence: 99%

“…Previous measurements of the density of ethyl nonanoate under atmospheric pressure were presented by Ortega et al at T = 298.15 K, Mumford et al . at T = 293.15 and 298.15 K, Senol et al at T = 293.2 K, Albert at T = 293.15–453.15 K, and Perkin at T = 288.15, 298.15 K. Besides, Liu et al carried out measurements of the heat capacity of ethyl nonanoate in the temperature range of 303–393 K at pressures up to 25 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Speed of Sound and Derived Properties of Ethyl Nonanoate

et al. 2019

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Ethyl nonanoate is a promising component of biodiesel with a satisfactory cetane number and reactivity. The speeds of sound in ethyl nonanoate were measured by the Brillouin light scattering (BLS) method within the temperatures from 295.24 to 593.15 K and at pressures up to 10 MPa. The relative expanded uncertainty (k = 2) of our BLS experimental system is estimated to be less than 0.7%. The densities of ethyl nonanoate were measured using a vibrating tube densimeter at atmospheric pressure in the temperature range of 293.15–353.15 K, and the absolute average relative deviation between the experimental densities and the literature data is 0.12%. For temperatures between 303.15 and 353.15 K and at pressures up to 10 MPa, these measurements were used to calculate densities, isobaric heat capacities, and indirect derivative properties including the isobaric thermal expansion, the isothermal compressibility, the isentropic compressibility, and the internal pressure. The comparison between the calculated isobaric heat capacities and the literature values shows a satisfactory agreement with an absolute average relative deviation of 0.18% and a maximum deviation of 0.38%. At the end, the dependences of internal pressure of ethyl nonanoate on temperature and pressure were found to be in accordance with those of ethyl caprylate and ethyl caprate.

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“…Typically, thermodynamic cycles have become the main approach used to conserve energy since the industrial revolution [1], while the working fluid is the energy carrier in the thermodynamic cycles. Therefore, the efficiency of thermodynamic cycles can be enhanced by employing a working fluid with good thermophysical properties [2][3][4]. Notably, mixing the working fluid with other materials is a promising way to modify the thermophysical properties of the basic working fluid.…”

Section: Introductionmentioning

confidence: 99%

Energy Storage Analysis of UIO-66 and Water Mixed Nanofluids: An Experimental and Theoretical Study

Zhou

Wang

2019

Energies

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The thermal energy storage properties of a working fluid can be modified by the exothermic and endothermic adsorption and desorption of fluid molecules in the micro/nanoporous materials. In this study, thermogravimetric (TG) analysis experiments and molecular simulations (molecular dynamics, MD, and grand canonical Monte Carlo, GCMC) were employed to examine the thermal energy storage properties of the UIO-66 metal organic framework material, UIO-66/H2O nanofluids and pure water. Our results showed that the molecular simulation calculations were, in principle, consistent with the obtained experimental data. The thermal energy storage performance of UIO-66/H2O nanofluids was enhanced with the increase in the UIO-66 mass fraction. In addition, the differences between the simulation calculations and experimental results could be mainly ascribed to the different structures of UIO-66 and the evaporation of fluid samples. Furthermore, this work indicated that molecular simulations contributed to developing novel working pairs of metal organic heat carriers (MOHCs).

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Experimental and correlational study of isobaric molar heat capacities of fatty acid esters: Ethyl nonanoate and ethyl dodecanoate

Cited by 24 publications

References 29 publications

Experimental Study on Isobaric Molar Heat Capacities of a Deep Eutectic Solvent: Choline Chloride + Ethylene Glycol

Experimental Study on Isobaric Molar Heat Capacities of a Deep Eutectic Solvent: Choline Chloride + Ethylene Glycol

Speed of Sound and Derived Properties of Ethyl Nonanoate

Energy Storage Analysis of UIO-66 and Water Mixed Nanofluids: An Experimental and Theoretical Study

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