Abstract
This paper presents phase-equilibrium pressure−temperature data for the clathrate hydrates formed in two three-component systemsthe difluoromethane + fluorocyclopentane + water system and the krypton + fluorocyclopentane + water system. The vapor + liquid + liquid + hydrate four-phase equilibrium in the former system was measured at pressures from (0.110 to 1.040) MPa and at temperatures from (288.65 to 299.55) K, while that in the latter system was measured at pressures from (0.111 to 4.866) MPa and at temperatures from (286.55 to 308.45) K. The temperature in the former four-phase equilibrium was found to exceed that in the three-phase equilibrium in the two-component difluoromethane + water system by 9 K or more over the pressure range up to 1.040 MPa. The temperature in the latter four-phase equilibrium was found to be higher than that in the three-phase equilibrium in the two-component krypton + water system by more than 23 K over the pressure range up to 4.866 MPa.
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