Pages 371-372
Solid-liquid equilibrium (SLE), containing clathrate hydrate formation, was measured for tertahydrofurane (THF) + water (H_2O) system by use of a static type apparatus at 272.07-277.64 K. The experimental data were correlated with Schroder-van Laar equation assuming ideal solution and group contribution model of heat of fusion for THF・17H_2O hydrate. The density of THF hydrate was also measured by use of a flow type apparatus at 276.37 K. An oscillation U-tube densimeter was equipped with the apparatus, and the apparent density was measured for the mixture of liquid and THF・17H_2O hydrate. Using the calculated SLE, and mass and volume balances in the oscillation U-tube, the density of THF・17H_2O hydrate was estimated to be 999.04kg/m^3. The value was close to the theoretical one, 999.14kg/m^3.
