Methane Hydrate Dissociation Conditions in High-Concentration NaCl/KCl/CaCl 2 Aqueous Solution: Experiment and Correlation

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The dissociation conditions of methane hydrate in high concentration aqueous solutions of NaCl, KCl, and CaCl2 are reported in this work. A total of 80 sets of H−L−V equilibrium data of methane hydrate in aqueous solutions of NaCl (9.45−23.71 wt %), KCl (13.93−21.88 wt %), and CaCl2 (13.78−35.50 wt %) were measured at the temperature range of (273.65−291.85) K and the pressure range of (5.43−65.12) MPa. A modified step-heating method with high efficiency was employed in the measurements. Good agreements were recorded when the measured data were compared with the literature data and the predictions of well-known software. A generalized correlation was developed for the equilibrium conditions of methane hydrate in aqueous salt solutions. Excellent agreement was recorded in the comparison of the prediction and the experimental data in the literature and those measured in this work.

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Methane Hydrate Dissociation Conditions in High-Concentration NaCl/KCl/CaCl 2 Aqueous Solution: Experiment and Correlation

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