Thermodynamic properties of biodiesel and petro-diesel blends at high pressures and temperatures. Experimental and modeling
Само за регистроване кориснике
2016
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One of the solutions to greenhouse gases emission is the use of biodiesels, since their mixtures with petro-diesel can be used as fuel in existing diesel engines without additional corrections in engines' design. In order to estimate engine performance and increase its efficiency, it is necessary to know the basic properties of fuels under different operating conditions, and among the most important ones are density and viscosity. Therefore, the densities of pure petro-diesel, as well as densities of its blends with sunflower oil methyl and ethyl esters, in the ratio of 10 vol% and 20 vol% of the biodiesel, at temperatures 293.15-413.15 K and at pressures of 0.1-60 MPa, are presented here. Measurements were taken at an Anton Paar DMA HP densimeter. For the device calibration the classical calibration method with one reference fluid was applied. Also, for the same samples, the viscosities at 288.15-373.15 K and the refractive indices at 288.15-343.15 K at atmospheric pressure were measu...red. Measured densities decrease linearly as temperature rises along isobars and increase with pressure rise at a constant temperature for all examined samples. Refractive index, also, decreases linearly with temperature rise, while viscosity decreases exponentially with increase in temperature. Densities and refractive indices are higher for blends with sunflower oil methyl esters than with its ethyl esters, opposite to viscosity. Densities of blends increase linearly with rise in biodiesel share, while the increase of viscosity is exponential. Density data were fitted to the modified Tammann-Tait equation and the obtained results were used for calculation of derived thermodynamic properties such as the isothermal compressibility, the isobaric thermal expansivity, the internal pressure and the difference between specific heat capacity at constant pressure and the specific heat capacity at constant volume. The absolute average percentage deviations of the measured densities from those calculated using the modified Tammann-Tait equation were about 0.01%, for all studied samples, assessing positively the correlation procedure. The dependence of the measured and calculated properties of the blends on biodiesel amount was also examined.
Кључне речи:
Petro-diesel and biodiesel blends / High pressure density / Isothermal compressibility / Isobaric thermal expansivity / Viscosity / Refractive indexИзвор:
Fuel, 2016, 184, 277-288Издавач:
- Elsevier Sci Ltd, Oxford
Финансирање / пројекти:
- Faculty of Technology and Metallurgy, University of Belgrade
- Нови индустријски и еколошки аспекти примене хемијске термодинамике на унапређење хемијских процеса са вишефазним и вишекомпонентним системима (RS-172063)
- Наноструктурни функционални и композитни материјали у каталитичким и сорпционим процесима (RS-45001)
DOI: 10.1016/j.fuel.2016.07.023
ISSN: 0016-2361
WoS: 000381619800032
Scopus: 2-s2.0-84978204447
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Ivaniš, Gorica AU - Radović, Ivona AU - Veljković, Vlada B. AU - Kijevčanin, Mirjana PY - 2016 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3232 AB - One of the solutions to greenhouse gases emission is the use of biodiesels, since their mixtures with petro-diesel can be used as fuel in existing diesel engines without additional corrections in engines' design. In order to estimate engine performance and increase its efficiency, it is necessary to know the basic properties of fuels under different operating conditions, and among the most important ones are density and viscosity. Therefore, the densities of pure petro-diesel, as well as densities of its blends with sunflower oil methyl and ethyl esters, in the ratio of 10 vol% and 20 vol% of the biodiesel, at temperatures 293.15-413.15 K and at pressures of 0.1-60 MPa, are presented here. Measurements were taken at an Anton Paar DMA HP densimeter. For the device calibration the classical calibration method with one reference fluid was applied. Also, for the same samples, the viscosities at 288.15-373.15 K and the refractive indices at 288.15-343.15 K at atmospheric pressure were measured. Measured densities decrease linearly as temperature rises along isobars and increase with pressure rise at a constant temperature for all examined samples. Refractive index, also, decreases linearly with temperature rise, while viscosity decreases exponentially with increase in temperature. Densities and refractive indices are higher for blends with sunflower oil methyl esters than with its ethyl esters, opposite to viscosity. Densities of blends increase linearly with rise in biodiesel share, while the increase of viscosity is exponential. Density data were fitted to the modified Tammann-Tait equation and the obtained results were used for calculation of derived thermodynamic properties such as the isothermal compressibility, the isobaric thermal expansivity, the internal pressure and the difference between specific heat capacity at constant pressure and the specific heat capacity at constant volume. The absolute average percentage deviations of the measured densities from those calculated using the modified Tammann-Tait equation were about 0.01%, for all studied samples, assessing positively the correlation procedure. The dependence of the measured and calculated properties of the blends on biodiesel amount was also examined. PB - Elsevier Sci Ltd, Oxford T2 - Fuel T1 - Thermodynamic properties of biodiesel and petro-diesel blends at high pressures and temperatures. Experimental and modeling EP - 288 SP - 277 VL - 184 DO - 10.1016/j.fuel.2016.07.023 ER -
@article{ author = "Ivaniš, Gorica and Radović, Ivona and Veljković, Vlada B. and Kijevčanin, Mirjana", year = "2016", abstract = "One of the solutions to greenhouse gases emission is the use of biodiesels, since their mixtures with petro-diesel can be used as fuel in existing diesel engines without additional corrections in engines' design. In order to estimate engine performance and increase its efficiency, it is necessary to know the basic properties of fuels under different operating conditions, and among the most important ones are density and viscosity. Therefore, the densities of pure petro-diesel, as well as densities of its blends with sunflower oil methyl and ethyl esters, in the ratio of 10 vol% and 20 vol% of the biodiesel, at temperatures 293.15-413.15 K and at pressures of 0.1-60 MPa, are presented here. Measurements were taken at an Anton Paar DMA HP densimeter. For the device calibration the classical calibration method with one reference fluid was applied. Also, for the same samples, the viscosities at 288.15-373.15 K and the refractive indices at 288.15-343.15 K at atmospheric pressure were measured. Measured densities decrease linearly as temperature rises along isobars and increase with pressure rise at a constant temperature for all examined samples. Refractive index, also, decreases linearly with temperature rise, while viscosity decreases exponentially with increase in temperature. Densities and refractive indices are higher for blends with sunflower oil methyl esters than with its ethyl esters, opposite to viscosity. Densities of blends increase linearly with rise in biodiesel share, while the increase of viscosity is exponential. Density data were fitted to the modified Tammann-Tait equation and the obtained results were used for calculation of derived thermodynamic properties such as the isothermal compressibility, the isobaric thermal expansivity, the internal pressure and the difference between specific heat capacity at constant pressure and the specific heat capacity at constant volume. The absolute average percentage deviations of the measured densities from those calculated using the modified Tammann-Tait equation were about 0.01%, for all studied samples, assessing positively the correlation procedure. The dependence of the measured and calculated properties of the blends on biodiesel amount was also examined.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Fuel", title = "Thermodynamic properties of biodiesel and petro-diesel blends at high pressures and temperatures. Experimental and modeling", pages = "288-277", volume = "184", doi = "10.1016/j.fuel.2016.07.023" }
Ivaniš, G., Radović, I., Veljković, V. B.,& Kijevčanin, M.. (2016). Thermodynamic properties of biodiesel and petro-diesel blends at high pressures and temperatures. Experimental and modeling. in Fuel Elsevier Sci Ltd, Oxford., 184, 277-288. https://doi.org/10.1016/j.fuel.2016.07.023
Ivaniš G, Radović I, Veljković VB, Kijevčanin M. Thermodynamic properties of biodiesel and petro-diesel blends at high pressures and temperatures. Experimental and modeling. in Fuel. 2016;184:277-288. doi:10.1016/j.fuel.2016.07.023 .
Ivaniš, Gorica, Radović, Ivona, Veljković, Vlada B., Kijevčanin, Mirjana, "Thermodynamic properties of biodiesel and petro-diesel blends at high pressures and temperatures. Experimental and modeling" in Fuel, 184 (2016):277-288, https://doi.org/10.1016/j.fuel.2016.07.023 . .