TY - JOUR
T1 - Phase equilibrium for structure H hydrates formed with methane plus cycloheptane, cycloheptanone, or oxacycloheptane
AU - Kozaki, Takahiro
AU - Taguchi, Tatsuhiko
AU - Takeya, Satoshi
AU - Ohmura, Ryo
PY - 2010/9/9
Y1 - 2010/9/9
N2 - Pressure and temperature conditions for the four-phase equilibrium in systems that include liquid water, structure H hydrate, methane gas, and liquid hydrocarbon substances (cycloheptane, cycloheptanone, or oxacycloheptane) were measured over the temperature range (273.5 to 284.1) K. The measurements indicate that, at 274 K, the equilibrium pressures of the systems with cycloheptane, cycloheptanone, and oxacycloheptane were lower by (1.6, 1.3, and 1.5) MPa, respectively, than those of the structure I methane hydrates in equilibrium with liquid water and methane vapor. Powder X-ray diffraction measurements of the formed hydrate samples confirmed structure H hydrates.
AB - Pressure and temperature conditions for the four-phase equilibrium in systems that include liquid water, structure H hydrate, methane gas, and liquid hydrocarbon substances (cycloheptane, cycloheptanone, or oxacycloheptane) were measured over the temperature range (273.5 to 284.1) K. The measurements indicate that, at 274 K, the equilibrium pressures of the systems with cycloheptane, cycloheptanone, and oxacycloheptane were lower by (1.6, 1.3, and 1.5) MPa, respectively, than those of the structure I methane hydrates in equilibrium with liquid water and methane vapor. Powder X-ray diffraction measurements of the formed hydrate samples confirmed structure H hydrates.
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U2 - 10.1021/je9010745
DO - 10.1021/je9010745
M3 - Article
AN - SCOPUS:77956517764
VL - 55
SP - 3059
EP - 3062
JO - Journal of Chemical & Engineering Data
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
IS - 9
ER -