Experimental Determination of CCl₄ Hydrate Phase Equilibria up to High Pressures

Abstract

A number of hydrate phase boundaries of the binary system of tetrachloromethane (CCl 4 ) + water were measured experimentally at several temperatures and from low pressures up to 89.25 MPa. These hydrate phase boundaries included hydrate−ice−vapor, hydrate−liquid CCl 4 −vapor, hydrate−water−vapor, hydrate−solid CCl 4 −liquid CCl 4 , hydrate−solid CCl 4 −water, and hydrate−liquid CCl 4 −water. From the points of intersections of the different boundaries, the three quadruple points of hydrate−ice−water−vapor, hydrate−liquid CCl 4 −water−vapor, and hydrate−solid CCl 4 −liquid CCl 4 −water were determined as (273.18 K, 4.72 kPa), (273.71 K, 5.25 kPa), and (273.35 K, 55.94 MPa), respectively.