Thermodynamic assessment of binary solid-state thermal storage materials

Thermodynamic modeling of binary phase diagram of 2-amino-2-methyl-1, 3-propanediol and TRIS(hydroxymethyl)aminomethane system with experimental verification

“…There are few known crystals that exhibit this solid state energy storage property. In order to develop more materials for practical applications, binary or ternary systems are sought [4][5][6][7][8][9][10]. Typically, the low temperature phases have layered or chained tetragonal or monoclinic structures and transform to a cubic structure with orientational disorder [11,12].…”

Thermodynamic assessment of binary erythritol-xylitol phase diagram for phase change materials design

“…These phase diagrams contain complex phase equilibrium features including eutectics, peritectics, eutectoids and peritectoids. The phase diagrams of the AMPL-NPG [34], [36], PER-AMPL [35], [36], and AMPL-TRIS [39], TRIS-PG, AMPL-PG [43], PER-PG-NPG [10], and PER-NPG-AMPL [38] systems were thermodynamically optimized, obtaining satisfactory agreements with the experimental data. For the TRIS-NPG system, an unoptimized phase diagram using ideal solutions assumption was found to have reasonable agreements with the experimental data, possibly owing to small excess molar Gibbs free energy parameters of the system [36].…”

“…The phase diagrams of the AMPL-NPG [34], [36], PER-AMPL [35], [36], and AMPL-TRIS [39], TRIS-PG, AMPL-PG [43], PER-PG-NPG [10], and PER-NPG-AMPL [38] systems were thermodynamically optimized, obtaining satisfactory agreements with the experimental data. For the TRIS-NPG system, an unoptimized phase diagram using ideal solutions assumption was found to have reasonable agreements with the experimental data, possibly owing to small excess molar Gibbs free energy parameters of the system [36]. In these organic systems, different liquid and solid solution phases were thermodynamically described by employing: regular and sub-regular solution models [10], [34], [35], [37], [38], [43]; substitutional solution models [10], [37], [38]; and ideal solution models [34].…”

“…By employing the CALPHAD method together with Thermo-Calc (PARROT module), the phase diagrams of: the binary polyol systems 2-amino-2-methyl-1,3-propanediol (AMPL)-neopentylglycol (NPG) [34], [36], pentaerythritol (PER)-AMPL [35], [36], and AMPL-pentaglycerine (PG) [43]; the binary amine-polyol systems tris(hydroxymethyl)aminomethane (TRIS)-NPG [36], TRIS-AMPL [39], and TRIS-PG [43]; and the ternary polyol systems PER-PG-NPG [10], [37] and PER-NPG-AMPL [38]; have been thermodynamically assessed. These phase diagrams contain complex phase equilibrium features including eutectics, peritectics, eutectoids and peritectoids.…”

Preparation of microencapsulated medium temperature phase change material of Tris(hydroxymethyl)methyl aminomethane@SiO2 with excellent cycling performance

“…Solid-solid PCMs show more advantages compared to the solid-liquid counterpart because of the liquid-free phase transition process. The phase change characteristics of the solid-solid PCMs including Pentaerythritol, Tris(hydroxymethyl)methyl aminomethane, Neopentyl glycol and 2-Amino-2-methyl-1,3-propanediol were widely studied [25][26][27][28][29]. Tris(hydroxymethyl)methyl aminomethane (Tris) with latent heat enthalpy of about 260 J/g is one of the most favorite solid-solid PCMs which can be applied in medium temperature range [29][30][31].…”