Heat capacities and thermal diffusivities of n-alkane acid ethyl esters—biodiesel fuel components
- Авторлар: Bogatishcheva N.1, Faizullin M.1, Nikitin E.1
-
Мекемелер:
- Institute of Thermal Physics, Ural Branch
- Шығарылым: Том 91, № 9 (2017)
- Беттер: 1647-1653
- Бөлім: Chemical Thermodynamics and Thermochemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/169685
- DOI: https://doi.org/10.1134/S0036024417090084
- ID: 169685
Дәйексөз келтіру
Аннотация
The heat capacities and thermal diffusivities of ethyl esters of liquid n-alkane acids CnH2n–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 Cp,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.
Негізгі сөздер
Авторлар туралы
N. Bogatishcheva
Institute of Thermal Physics, Ural Branch
Хат алмасуға жауапты Автор.
Email: Bogatishcheva@mail.ru
Ресей, Yekaterinburg, 620016
M. Faizullin
Institute of Thermal Physics, Ural Branch
Email: Bogatishcheva@mail.ru
Ресей, Yekaterinburg, 620016
E. Nikitin
Institute of Thermal Physics, Ural Branch
Email: Bogatishcheva@mail.ru
Ресей, Yekaterinburg, 620016