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Abstract
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In this study, the experimental data for dissociation conditions of carbon dioxide hydrates in the presence of 0.05
and 0.1 mass fraction KCl solution 0.1 and 0.2 mass fraction methanol and ethylene glycol were measured and then reported at
di ?erent temperatures and pressure ranges not available in the related literature. The phase equilibrium curves were drawn using
an isochoric pressure-search method. To validate the used apparatus and the experimental ? ndings of the current study and also
to show the inhibition e? ects of the aqueous solutions used in this study, the experimental values were compared with some
selected experimental data from the literature about the dissociation conditions of carbon dioxide hydrates in the presence of
pure water and aqueous solution with 0.05 mass fraction KCl. Finally, to examine the inhibitory e ?ect of various inhibitors and
their synergies on each other, the suppressed temperature for hydrate formation was evaluated in the presence of di ?erent
inhibitor solutions. This value showed that the rate of suppressed temperature for hydrate formation for each solution has been
almost constant in various pressures. The synergy e ?ect of KCl with methanol or glycol at low concentrations is negligible
indicating that these two inhibitors have no impact on each other. It was also shown that, by increasing the concentration of the
inhibitors, this rule was violated, the inhibitors were a? ected by each other, and the amount of inhibition e? ect increases. This
synergy is of utmost importance for oil and gas pipelines and also for the industrial equipment that naturally contain some salt, in
which alcohol or glycol will be added to prevent hydrate formation
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