TY - JOUR
T1 - Thermophysical property measurements on tetrabutylphosphonium sulfate ionic semiclathrate hydrate consisting of the bivalent anion
AU - Arai, Yuta
AU - Koyama, Ryo
AU - Endo, Fuyuaki
AU - Hotta, Atsushi
AU - Ohmura, Ryo
N1 - Funding Information:
This study was supported by JKA Foundation (Grant No. 2018M-170 ) and JSPS KAKENHI (Grant No. 17H03122 ).
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/4
Y1 - 2019/4
N2 - To develop the “hydrate thermal energy storage technology” it is desired to reveal the mechanism of the thermophysical property manifestation on ionic semiclathrate hydrate. The influence of valence on thermophysical properties has not been investigated so far. In the present study, the phase equilibrium temperatures and the dissociation heats of tetrabutylphosphonium sulfate ((TBP)2SO4) ionic semiclathrate hydrate were experimentally studied. (TBP)2SO4 hydrate consists of the bivalent anion, SO42−. The highest phase equilibrium temperature was 6.5 °C at the mass fraction range from 0.363 to 0.384. The largest dissociation heat was (168.8 ± 2.4) kJ·kg−1 at the mass fraction 0.374. These values of the phase equilibrium temperature and the dissociation heat were respectively lower and smaller than those of the ionic semiclathrate hydrates with the monovalent anion. As a new choice for thermal energy storage medium, (TBP)2SO4 hydrate would be suitable to the automotive air conditioner and the cold chain for blood or perishable foods.
AB - To develop the “hydrate thermal energy storage technology” it is desired to reveal the mechanism of the thermophysical property manifestation on ionic semiclathrate hydrate. The influence of valence on thermophysical properties has not been investigated so far. In the present study, the phase equilibrium temperatures and the dissociation heats of tetrabutylphosphonium sulfate ((TBP)2SO4) ionic semiclathrate hydrate were experimentally studied. (TBP)2SO4 hydrate consists of the bivalent anion, SO42−. The highest phase equilibrium temperature was 6.5 °C at the mass fraction range from 0.363 to 0.384. The largest dissociation heat was (168.8 ± 2.4) kJ·kg−1 at the mass fraction 0.374. These values of the phase equilibrium temperature and the dissociation heat were respectively lower and smaller than those of the ionic semiclathrate hydrates with the monovalent anion. As a new choice for thermal energy storage medium, (TBP)2SO4 hydrate would be suitable to the automotive air conditioner and the cold chain for blood or perishable foods.
KW - Bivalent anion
KW - Dissociation heat
KW - Ionic semiclathrate hydrate
KW - Phase equilibrium temperature
KW - Tetrabutylphosphonium sulfate hydrate
KW - Thermal energy storage
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U2 - 10.1016/j.jct.2018.11.017
DO - 10.1016/j.jct.2018.11.017
M3 - Article
AN - SCOPUS:85057166998
SN - 0021-9614
VL - 131
SP - 330
EP - 335
JO - Journal of Chemical Thermodynamics
JF - Journal of Chemical Thermodynamics
ER -