Experimental Determination of CCl4 Hydrate Phase Equilibria up to High Pressures

Abstract

A number of hydrate phase boundaries of the binary system of tetrachloromethane (CCl4) + 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 CCl4–vapor, hydrate–water–vapor, hydrate–solid CCl4–liquid CCl4, hydrate–solid CCl4–water, and hydrate–liquid CCl4–water. From the points of intersections of the different boundaries, the three quadruple points of hydrate–ice–water–vapor, hydrate–liquid CCl4–water–vapor, and hydrate–solid CCl4–liquid CCl4–water were determined as (273.18 K, 4.72 kPa), (273.71 K, 5.25 kPa), and (273.35 K, 55.94 MPa), respectively.