Phase equilibrium for ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide
Takayuki Kobori, Sanehiro Muromachi, Ryo Ohmura
This paper reports the vapor-liquid-hydrate three phase equilibrium conditions of ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide. The three phase equilibrium temperatures were measured in the ranges from 278.8 to 287.4 K of temperature and from 0.05 to 0.45 of mass fraction of tetra-n-butylammonium bromide (wTBAB). Measurements were performed at the system pressures of 0.3 MPa, 0.6 MPa, and 1 MPa. For the three system pressures, the equilibrium temperatures increased with the increase in wTBAB for wTBAB < 0.35 and decreased for wTBAB > 0.40. The highest equilibrium temperatures were obtained at wTBAB = 0.35 and 0.40. The equilibrium temperatures of the tetra-n-butylammonium bromide + carbon dioxide hydrates were higher than those of the simple tetra-n-butylammonium bromide hydrates formed under atmospheric pressure. The improvement of the thermodynamic stability of the tetra-n-butylammonium bromide + carbon dioxide hydrates is ascribed to the incorporation of carbon dioxide molecules into the hydrate cages. The data obtained in the present study may be utilized to specify the thermodynamic conditions to form the tetra-n-butylammonium bromide + carbon dioxide hydrates without forming the simple tetra-n-butylammonium hydrates.
Journal of Chemical and Engineering Data
https://doi.org/10.1021/je500589z
Chemical Engineering(all)
10.1021/je500589z
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Bromides Chemical Compounds
Phase equilibria Chemical Compounds
Hydrates Chemical Compounds
Carbon Dioxide Chemical Compounds
Carbon dioxide Engineering & Materials Science
Atmospheric pressure Chemical Compounds
Kobori, T., Muromachi, S., & Ohmura, R. (2015). Phase equilibrium for ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide. Journal of Chemical and Engineering Data, 60(2), 299-303. https://doi.org/10.1021/je500589z
Phase equilibrium for ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide. / Kobori, Takayuki; Muromachi, Sanehiro; Ohmura, Ryo.
In: Journal of Chemical and Engineering Data, Vol. 60, No. 2, 12.02.2015, p. 299-303.
Kobori, T, Muromachi, S & Ohmura, R 2015, 'Phase equilibrium for ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide', Journal of Chemical and Engineering Data, vol. 60, no. 2, pp. 299-303. https://doi.org/10.1021/je500589z
Kobori T, Muromachi S, Ohmura R. Phase equilibrium for ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide. Journal of Chemical and Engineering Data. 2015 Feb 12;60(2):299-303. https://doi.org/10.1021/je500589z
Kobori, Takayuki ; Muromachi, Sanehiro ; Ohmura, Ryo. / Phase equilibrium for ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide. In: Journal of Chemical and Engineering Data. 2015 ; Vol. 60, No. 2. pp. 299-303.
@article{62dfca9b24214aa382036ae182940501,
title = "Phase equilibrium for ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide",
abstract = "This paper reports the vapor-liquid-hydrate three phase equilibrium conditions of ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide. The three phase equilibrium temperatures were measured in the ranges from 278.8 to 287.4 K of temperature and from 0.05 to 0.45 of mass fraction of tetra-n-butylammonium bromide (wTBAB). Measurements were performed at the system pressures of 0.3 MPa, 0.6 MPa, and 1 MPa. For the three system pressures, the equilibrium temperatures increased with the increase in wTBAB for wTBAB < 0.35 and decreased for wTBAB > 0.40. The highest equilibrium temperatures were obtained at wTBAB = 0.35 and 0.40. The equilibrium temperatures of the tetra-n-butylammonium bromide + carbon dioxide hydrates were higher than those of the simple tetra-n-butylammonium bromide hydrates formed under atmospheric pressure. The improvement of the thermodynamic stability of the tetra-n-butylammonium bromide + carbon dioxide hydrates is ascribed to the incorporation of carbon dioxide molecules into the hydrate cages. The data obtained in the present study may be utilized to specify the thermodynamic conditions to form the tetra-n-butylammonium bromide + carbon dioxide hydrates without forming the simple tetra-n-butylammonium hydrates.",
author = "Takayuki Kobori and Sanehiro Muromachi and Ryo Ohmura",
doi = "10.1021/je500589z",
journal = "Journal of Chemical and Engineering Data",
publisher = "American Chemical Society",
T1 - Phase equilibrium for ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide
AU - Kobori, Takayuki
AU - Muromachi, Sanehiro
AU - Ohmura, Ryo
N2 - This paper reports the vapor-liquid-hydrate three phase equilibrium conditions of ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide. The three phase equilibrium temperatures were measured in the ranges from 278.8 to 287.4 K of temperature and from 0.05 to 0.45 of mass fraction of tetra-n-butylammonium bromide (wTBAB). Measurements were performed at the system pressures of 0.3 MPa, 0.6 MPa, and 1 MPa. For the three system pressures, the equilibrium temperatures increased with the increase in wTBAB for wTBAB < 0.35 and decreased for wTBAB > 0.40. The highest equilibrium temperatures were obtained at wTBAB = 0.35 and 0.40. The equilibrium temperatures of the tetra-n-butylammonium bromide + carbon dioxide hydrates were higher than those of the simple tetra-n-butylammonium bromide hydrates formed under atmospheric pressure. The improvement of the thermodynamic stability of the tetra-n-butylammonium bromide + carbon dioxide hydrates is ascribed to the incorporation of carbon dioxide molecules into the hydrate cages. The data obtained in the present study may be utilized to specify the thermodynamic conditions to form the tetra-n-butylammonium bromide + carbon dioxide hydrates without forming the simple tetra-n-butylammonium hydrates.
AB - This paper reports the vapor-liquid-hydrate three phase equilibrium conditions of ionic semiclathrate hydrates formed in the system of water + tetra-n-butylammonium bromide pressurized with carbon dioxide. The three phase equilibrium temperatures were measured in the ranges from 278.8 to 287.4 K of temperature and from 0.05 to 0.45 of mass fraction of tetra-n-butylammonium bromide (wTBAB). Measurements were performed at the system pressures of 0.3 MPa, 0.6 MPa, and 1 MPa. For the three system pressures, the equilibrium temperatures increased with the increase in wTBAB for wTBAB < 0.35 and decreased for wTBAB > 0.40. The highest equilibrium temperatures were obtained at wTBAB = 0.35 and 0.40. The equilibrium temperatures of the tetra-n-butylammonium bromide + carbon dioxide hydrates were higher than those of the simple tetra-n-butylammonium bromide hydrates formed under atmospheric pressure. The improvement of the thermodynamic stability of the tetra-n-butylammonium bromide + carbon dioxide hydrates is ascribed to the incorporation of carbon dioxide molecules into the hydrate cages. The data obtained in the present study may be utilized to specify the thermodynamic conditions to form the tetra-n-butylammonium bromide + carbon dioxide hydrates without forming the simple tetra-n-butylammonium hydrates.
U2 - 10.1021/je500589z
DO - 10.1021/je500589z
JO - Journal of Chemical and Engineering Data
JF - Journal of Chemical and Engineering Data