Critical properties, heat capacities, and thermal diffusivities of four saturated triglycerides

• Published in: The Journal of chemical thermodynamics 2017-10, Vol.113, p.308-314
• Main Authors: Bogatishcheva, Nataliya S., Faizullin, Mars Z., Popov, Alexander P., Nikitin, Eugene D.
• Format: Article
• Language: English
• Subjects: Critical properties; Heat capacity; Measurements; Thermal diffusivity; Triglycerides
• ISSN: 0021-9614; 1096-3626
• DOI: 10.1016/j.jct.2017.07.006

•Critical properties, heat capacities, thermal diffusivities of four triglycerides were measured.•The triglycerides studied have 8, 10, 12, 14 carbon atoms in a parent acid.•The triglycerides decompose at near-critical temperatures.•Pulse-heating method with short residence times was used. The critical temperatures, pressures, heat capacities, and thermal diffusivities of saturated triglycerides C3H5[CnH2n-1O2]3 with n=8, 10, 12, 14 have been measured. The experimental critical constants of triglycerides have been compared with those calculated using the group contribution methods of Constantinou and Gani, Marrero and Gani, Hukkerikar and co-workers, and Cunico and co-workers. The heat capacities and thermal diffusivities have been measured in the temperature range from about the melting point of a triglyceride to 410–425K. The temperature dependencies of the heat capacities and thermal diffusivities have been approximated by a third-order and a first-order polynomial, respectively. The coefficients of these polynomials have been given. Using the experimental data, the thermal conductivities of triglycerides have been calculated.