The temperature and pressure conditions for vapor + liquid + liquid + hydrate four-phase equilibrium in the krypton + 2,2-dimethylbutane + water system have been measured over the temperatures from 273.5 K to 285.6 K. The four-phase equilibrium pressure at a given temperature is lower by 1 MPa to 2.1 MPa than the corresponding equilibrium pressure of structure-II hydrate-forming krypton + water system without 2,2-dimethylbutane. This reduction in the equilibrium pressure due to the addition of 2,2-dimethylbutane suggests the formation of a structure-H hydrate containing krypton as a small-molecule guest and 2,2-dimethylbutane as a large-molecule guest substance. The formation of structure-H hydrate has been confirmed by means of X-ray diffraction measurement.
ASJC Scopus subject areas
- Chemical Engineering(all)