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Heat capacities and thermal diffusivities of n-alkane acid ethyl esters—biodiesel fuel components

  • Chemical Thermodynamics and Thermochemistry
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Abstract

The heat capacities and thermal diffusivities of ethyl esters of liquid n-alkane acids C n H2n–1O2C2H5 with the number of carbon atoms in the parent acid n = 10, 11, 12, 14, and 16 are measured. The heat capacities are measured using a DSC 204 F1 Phoenix heat flux differential scanning calorimeter (Netzsch, Germany) in the temperature range of 305–375 K. Thermal diffusivities are measured by means of laser flash method on an LFA-457 instrument (Netzsch, Germany) at temperatures of 305–400 K. An equation is derived for the dependence of the molar heat capacities of the investigated esters on temperature. It is shown that the dependence of molar heat capacity C p,m (298.15 K) on n (n = 1–6) is close to linear. The dependence of thermal diffusivity on temperature in the investigated temperature range is described by a first-degree polynomial, but thermal diffusivity a (298.15 K) as a function of n has a minimum at n = 5.

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Authors and Affiliations

  1. Institute of Thermal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620016, Russia

    N. S. Bogatishcheva, M. Z. Faizullin & E. D. Nikitin

Authors
  1. N. S. Bogatishcheva
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  2. M. Z. Faizullin
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  3. E. D. Nikitin
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Correspondence to N. S. Bogatishcheva.

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Original Russian Text © N.S. Bogatishcheva, M.Z. Faizullin, E.D. Nikitin, 2017, published in Zhurnal Fizicheskoi Khimii, 2017, Vol. 91, No. 9, pp. 1484–1490.

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Bogatishcheva, N.S., Faizullin, M.Z. & Nikitin, E.D. Heat capacities and thermal diffusivities of n-alkane acid ethyl esters—biodiesel fuel components. Russ. J. Phys. Chem. 91, 1647–1653 (2017). https://doi.org/10.1134/S0036024417090084

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  • DOI: https://doi.org/10.1134/S0036024417090084

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