Critical properties, heat capacities, and thermal diffusivities of four saturated triglycerides. (October 2017)

• Record Type: Journal Article
• Authors: Bogatishcheva, Nataliya S.; Faizullin, Mars Z.; Popov, Alexander P.; Nikitin, Eugene D.
• Is Part Of: Journal of chemical thermodynamics. Volume 113(2017)
• Page Start: 308
• Page End: 314
• Publication Date: 2017-10
• Subjects: Critical properties -- Heat capacity -- Thermal diffusivity -- Measurements -- Triglycerides; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2017.07.006
• Languages: English
• ISSNs: 0021-9614

Abstract

Highlights: 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. Abstract: The critical temperatures, pressures, heat capacities, and thermal diffusivities of saturated triglycerides C3 H5 [Cn H2n-1 O2 ]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 410–425 K. 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.