Accurate DSC measurement of the phase transition temperature in the TBPB–water system

Lin, Wei; Dalmazzone, Didier; Fürst, Walter; Delahaye, Anthony; Fournaison, Laurence; Clain, Pascal

doi:10.1016/j.jct.2013.02.005

Cited by 81 publications

(46 citation statements)

References 33 publications

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“…After complete melting of the hydrate, there are only the base line and sharp signals from thermal lag due to temperature change. The heat flow curve returns to the baseline [4,32] after complete hydrate melting. Therefore, the way to determine the equilibrium temperature for hydrate containing salts is to find the temperature when the heat flow curve start to return to the baseline.…”

Section: High-pressure Differential Scanning Calorimetry (Dsc) Methodmentioning

confidence: 99%

Methane hydrate phase equilibria for systems containing NaCl, KCl, and NH 4 Cl

Cha

Sum

2016

Fluid Phase Equilibria

106

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Section: High-pressure Differential Scanning Calorimetry (Dsc) Methodmentioning

confidence: 99%

Methane hydrate phase equilibria for systems containing NaCl, KCl, and NH 4 Cl

Cha

Sum

2016

Fluid Phase Equilibria

106

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“…Integration of each heat flow peaks allows then to build the specific enthalpy curve (Figure 32 part C). STEP method has been used for PCM mixture characterization such as commercial paraffin [29] and salts hydrates [30][31][32]. It has also recently been applied to the studied of semi clathrate hydrates with progressive dissociation [31].…”

Section: Step Methodsmentioning

confidence: 99%

Challenges of the Usual Graphical Methods Used to Characterize Phase Change Materials by Differential Scanning Calorimetry

et al. 2018

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Abstract:Modeling the thermal behavior of a plant or devices using Phase Change Materials (PCM) requires to know their thermophysical properties. The Differential Scanning Calorimetry (DSC) is a technic largely used to investigate them. However, under the pretext to experiment with small samples, some authors consider the DSC curves as directly representing the properties of the materials without realizing that this interpretation is very often incompatible with the thermodynamics laws: as an example, although a pure substance melts at a fixed temperature T F , it is proposed a melting through a temperature range higher than T F and depending on the experiments (heating rates, sample masses. . . ), for solutions the suggested characteristic temperatures are incompatible with the phase diagram, and also a hysteresis phenomenon is invented. . . . In this paper, we demonstrate by a model coupling thermodynamics and conduction heat transfers, that the DSC curves are exactly compatible with the thermodynamics of phase changes (melting at fixed temperature for pure substances, in conformity with phase diagrams for solutions. . . ). The cases of pure substances, saline solutions, substances with impurities or solid solutions are detailed. We indicate which information can, however, be given by the curves. We also propose a more sophisticated method by inverse calculations to determine the specific enthalpy whose all the thermodynamical properties can be deduced. Finally, we give some indications to understand and use the results indicating supercooling.

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“…Despite the very time consuming aspect of the stepwise scheme, this method provides a high accuracy of 0.1 K which is the temperature increment. Further detailed information about the dynamic and stepwise method are available in previous works [36,37].…”

Section: Experimental Methodsmentioning

confidence: 99%