Tetrahedral Phase Research Articles

Solubility of natural gases in aqueous salt solutions—I: Liquidus surfaces in the system CH 4-H 2O-NaCl 2-CaCl 2 at room temperatures and at pressures below 1000 psia

The solubility of methane in water, in aqueous solutions of sodium chloride, calcium chloride, and both sodium and calcium chloride has been determined at room temperatures and at pressures up to 1000 psia by the pressure decline method. The results for water agree with previous published values, but the solubilities in the salt solutions are considerably higher. The data obtained, augmented by other solubility figures from the literature, permit the construction of the liquidus surfaces in the tetrahedral phase model for the system CH 4-H 2O-NaCl-CaCl 2 at fixed temperature and pressure. An orthogonal projection of these surfaces is presented.