Heat capacity and phase transition of trimethylolethane

Suenaga, Keishi; Matsuo, Takasuke; Suga, Hiroshi

doi:10.1016/0040-6031(90)80406-o

Cited by 23 publications

(15 citation statements)

References 12 publications

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“…Experimental data, such as enthalpies and temperatures of phase transitions for pure PG, TRIS, and AMPL used for this calculation were taken from this work (listed in Table 1). The solid-solid and solid-liquid phase transition temperatures of pure PG reported from Murrill and Breed [14] were lower than our present work, but our values were close to those reported earlier [16,18,19]. The melting temperature of pure TRIS (~445 K) which was reported by previous literatures [12, 13, and 20] was close to the values we reported in this study.…”

Section: Thermodynamic Properties Of Pure Pg Tris and Amplsupporting

confidence: 90%

“…The data from above experiments [18,25, and our unpublished work] complement each other and are in good agreement in the mid-range where these data overlap with those of reference [18]. The heat capacity data of TRIS was obtained by using DSC from Chandra et al [25] in the temperature range of 305K-447.5K, by using MDSC from Suresh et al [26] over a temperature range of 193.5K-473.15K.…”

Section: Thermodynamic Properties Of Pure Pg Tris and Amplsupporting

confidence: 72%

“…The experimental heat capacity of PG was measured using DSC by Chandra et al [25] in the temperature range of 305K-447.5K including above ambient solidsolid phase properties. The low temperature heat capacity of PG was obtained adiabatically by Keishi et al [18] over temperatures ranging from 18.36K to 374.56K; the sub-ambient heat capacity of PG was also obtained adiabatically from our groups' unpublished work from 1.91K to 300.444K.…”

Section: Thermodynamic Properties Of Pure Pg Tris and Amplmentioning

confidence: 86%

“…However, the data for pure TRIS from Chandra et al [25] and Zhang et al [28] are slightly scattered above ambient solid-solid phase transition temperature. In the optimization, the higher weight for heat capacity was assigned to the data from Keishi et al [18], Chandra et al [25], and our unpublished work (previous work) for PG as well as assigned to the data from Suresh et al [26] and Arvidsson et al [27] for TRIS due to better convergence of heat capacity. Thermodynamic description of AMPL with experimental heat capacity from Chandra et al [25] and Zhang et al [23] was performed by Witusiewicz et al [24] by using CAPPHAD method.…”

Section: Thermodynamic Properties Of Pure Pg Tris and Amplmentioning

confidence: 99%

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Thermodynamic assessment of binary systems Tris(hydroxymethyl)aminomethane-Pentaglycerine (TRIS-PG) and 2-amino-2-methyl-1,3-propanediol-Pentaglycerine (AMPL-PG) phase diagrams

Shi

Gantan

Chandra

et al. 2016

Calphad

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Solid state phase change materials are considered as potential candidates for thermal energy storage. Among the solid-solid heat storage materials, the most promising heat storage materials are organic polyalcohol globular tetrahedral molecular crystals such as (CH 3)C(CH 2 OH) 3 for PG, (NH 2)C(CH 2 OH) 3 for TRIS, and (CH 3)(NH 2)C(CH 2 OH) 2 for AMPL, which store a large amount of thermal energy in their solid state high temperature phases with orientationally disorder crystal structure. In this study, we obtained the Gibbs energies of pure PG and pure TRIS derived utilizing the available experimental data including temperature-dependency of heat capacity, enthalpy, and transitions temperatures, as well as obtained optimized binary phase diagrams of TRIS-PG and AMPL-PG by CALPHAD calculations. The phase boundaries are verified by in-situ X-ray diffraction (XRD). Optimized database of these two binaries will allow exploration of ternary and higher order systems using CALPHAD methodology that will provide a wider selection of materials for practical thermal energy storage applications. Regular and sub-regular solution models are used for calculations in which the excess Gibbs energies are expressed by the Redlich-Kister-Muggianu polynomial. A set of self-consistent interaction parameters formulating the Gibbs energies of various phases in binary systems are obtained. The TRIS-PG binary phase diagram was calculated from room temperature to the liquid phase temperature, the modeled phase diagram and the experimental data from our work are in good agreement. We also used experimental data of TRIS-PG from the literature which shows a good agreement between the two data sets. Our optimized TRIS-PG phase diagrams show a wider solid-state two phase region, where there is demixing of phases, whereas the calculations from the literature show a very narrow region. We also present optimized AMPL-PG binary phase diagram using PARROT module in Thermal-Calc

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Section: Thermodynamic Properties Of Pure Pg Tris and Amplsupporting

confidence: 90%

Section: Thermodynamic Properties Of Pure Pg Tris and Amplsupporting

confidence: 72%

Section: Thermodynamic Properties Of Pure Pg Tris and Amplmentioning

confidence: 86%

Section: Thermodynamic Properties Of Pure Pg Tris and Amplmentioning

confidence: 99%

See 2 more Smart Citations

Thermodynamic assessment of binary systems Tris(hydroxymethyl)aminomethane-Pentaglycerine (TRIS-PG) and 2-amino-2-methyl-1,3-propanediol-Pentaglycerine (AMPL-PG) phase diagrams

Shi

Gantan

Chandra

et al. 2016

Calphad

View full text Add to dashboard Cite

show abstract

“…We have reported thermodynamic properties (4) of 2-hydroxymethyl-2-methyl-1,3-propanediol {CH 3 C(CH 2 OH) 3 } in a series of the hydroxymethyl-substituted neopentane family (CH 3 ) 4−n C(CH 2 OH) n . The aim of the study was to investigate the effect of substitution of a hydrogen-bond forming group for methyl groups in neopentane on the nature of the phase transition.…”

Section: Introductionmentioning

confidence: 99%