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Abstract
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In this study, hydrate dissociation conditions of
carbon dioxide in the presence of methanol/ethylene glycol CaCl 2 at the temperature range of 262.2 ? 276.8 K and the
pressure range of 1.49 ?3.36 MPa, not found in the related
literature, were measured and reported. The equilibrium data were
conducted by isochoric pressure search method. The experimental
? ndings showed that methanol inhibition power was superior to
that of ethylene glycol at similar mass concentrations. An available
thermodynamic model was used to predict and compare the
results with the measured experimental data. In addition, in order
to investigate the inhibitory e? ect of various inhibitors as well as
their synergy to one another, the suppressed temperature of
hydrate formation in the presence of various inhibitory solutions
used in this work and also in the similar studies in the literature was examined. This measurement indicated no e ?ect of pressure
on the reduction amount of suppressed temperature for each solution, so that it can be considered to be independent of pressure.
Moreover, at low concentrations synergy level of CaCl 2 with methanol or ethylene glycol was negligible, indicating no e ?ect of
these two inhibitors on the performance of each other. By increasing the concentration of alcohol and glycol, this rule was
interrupted and inhibitors interacted each other and the synergy level increased.
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