THERMODYNAMIC PROPERTIES OF BIOFUEL COMPONENTS
L.A. Akhmedova-Azizova1, I.M. Abdulagatov2, M.A. Mammedova3, G.N. Najafov4, M.A. Talybov5
2024   C   en   p.85-89

ABSTRACT

The density (r) and speed of sound (u) of two main components of biofuels, methyl laurate and methyl stearate, were measured at temperatures from (283 to 353) K and from (313 to 353) K at atmospheric pressure, respectively. An Anton Paar DSA 5000 М sound-speed analyzer, has been used to simultaneously measurements of the density and speed of sound of the methyl laurate and methyl stearate as the primary components of biodiesel fuel. The measured values of density and speed of sound were used to calculate other derived key thermodynamic properties such as the adiabatic coefficient of bulk compressibility (βS), coefficient of thermal expansion (αP), isothermal coefficient of bulk compressibility (βT), isochoric (CV) and isobaric (CP) heat capacities, enthalpy (ΔH) and entropy (ΔS) difference, partial temperature derivative of enthalpy (∂H/∂T)P and entropy (∂S/∂T)P, and the partial specific volume derivatives of internal energy (∂U/∂V)T (internal pressure) of methyl laurate 20 and methyl stearate as a function of temperature. The overall uncertainties (at the 95 % confidence level) of the reference correlations of the density and speed of sound of methyl laurate and methyl stearate are 0.025 % and 0.045 %, respectively.

Keywords: density, speed of sound, methyl esters (FAMEs), methyl laurate and methyl stearate.
DOI:10.70784/azip.3.2024CE85

Received: 2024
Internet publishing: 2024

AUTHORS & AFFILIATIONS

1. Azerbaijan Technical University, Department of Energy efficiency and green energy technologies akhmedova_la@yahoo.com
2. Geothermal and Renewal Energy Institute, High Temperature Joint Institute of the Russian Academy of Sciences, Makhachkala, Dagestan, Russia Federation. Dagestan State University, Makhachkala, Dagestan, Russian Federation. ilmutdina@gmail.com
3. Azerbaijan Technical University, Department of Energy efficiency and green energy technologies e.a.8900@mail.ru
4. PhD Associate professor, Baku Engineering University, Department of Physics, Baku, Azerbaijan gachaynajafov@gmail.com
5. Azerbaijan Technical University, Department of Energy efficiency and green energy technologies misirkhantalibov@yahoo.com

E-mail:

[1]   M.E. Tat, J.H. van Gerpen. Measurement of Biodiesel Speed of Sound and Its Impact on Injection Timing National Renewable Energy Laboratory Measurement of Biodiesel Speed of Sound and Its Impact on Injection Timing. NREL/SR-510-31462, Golden, Colorado, 2003.
[2]   M.L. Huber, E.W. Lemmon, A. Kazakov, L.S. Ott, T.J. Bruno. Model for the Thermodynamic Properties of a Biodiesel Fuel. Energy & Fuels, 2009, 23, 3790-3797.
[3]   S.M. Rasulov, I.M. Abdulagatov. PVT, saturated liquid density and vapor-pressure measurements of main components of the biofuels at high temperatures and high pressures: Methyl palmitate. Fuel 2018, 218, 282-294.
[4]   S.M. Rasulov, I.A. Isaev, M. Dzida, I.M. Abdulagatov. High-temperature and high-pressure density and liquid–vapor phase transition properties of methyl octanoate as main biofuel component. Fuel, 2021, 291, 120058.
[5]   R.A. Usmanov, S.V. Mazanov, A.R. Gabitova, L.Kh. Miftakhova, F.M. Gumerov, R.Z. Musin, I.M. Abdulagatov. The effect of fatty acid ethyl esters concentration on the kinematic viscosity of biodiesel fuel. J. Chem. Eng. Data, 2015, 60, 3404–3413.
[6]   D. Sagdeev, I. Gabitov, Ch. Isyanov, V. Khairutdinov, M. Farakhov, Z. Zaripov, I.Abdulagatov. Temperature effect on density and viscosity of oleic acid. J. Am. Oil Chem. Soc., 2019, 96, 647- 662.
[7]   I.M. Abdulagatov, N.G. Polikhronidi, R.G. Batyrova, M. Dzida. Isochoric heat capacity, phase transition and derived key thermodynamic properties of methyl decanoate, Fuel, 2022, 310, 122251.
[8]   I.M. Abdulagatov, L.A. Akhmedova-Azizova, R.M. Aliev, G.B. Badavov. Measurements of the Density, Speed of Sound, Viscosity and Derived Thermodynamic Properties of Geothermal Fluids. Part. I . J. Chem. Eng. Data, 2016, 61, 234–246.
[9]   I.M. Abdulagatov, L.A. Akhmedova-Azizova, R.M. Aliev, G.B. Badavov. Measurements of the density, speed of sound, viscosity and derived thermodynamic properties of geothermal fluids. Part II. Appl. Geochem., 2016, 69, 28-41.
[10]  I.M. Abdulagatov, G.B. Badavov, L.A.Akhmedova-Azizova, R.M. Aliev. Thermodynamic properties of geothermal fluids from South Russia. Kayakent and Kizlyar hot sources, In: Heat- Mass Transfer and Geodynamics of the Lithosphere, ed. Dr. V. Svalova, Springer, 2021, pp. 275- 301.
[11]  I.M. Abdulagatov, G.B. Badavov, L.A.Akhmedova-Azizova, R.M. Aliev. Thermodynamic properties of geothermal fluids from South Russia: Izberbash and Thernair hot sources, In: Heat- Mass Transfer and Geodynamics of the Lithosphere, ed. Dr. V. Svalova, Springer, 2021, pp.303- 333.
[12]  K. Moodley. Density, Speed of Sound, and Refractive Index Data for Butan-1-ol (1) + Butane- 1,4-diol (2)/Butane-2,3-diol (2) Mixtures at T= (298.15−338.15) K and 0.101 MPa. J. Chem. Eng. Data, 2021, 66, 12, 4391–4403.
[13]  L.A. Akhmedova-Azizova, M.A. Mammedova, G.N. Nazhafov, I.M. Abdulagatov, M.A. Talybov, Measurements and reference correlation of the density and speed of sound and derived thermodynamic properties of methyl laurate and methyl stearate. Journal of Chemical & Engineering Data, 2022, 67(3), 580-593