Clathrate hydrate-based technologies have been considered as promising alternatives for the effective management of the climate change risks related to emissions of carbon dioxide produced by human activities. This work presents a combined experimental and computational investigation of the effects of experimental parameters, operational procedures, and experimental configuration characteristics on the phase behavior of CO2-H2O systems and CO2 hydrates formation, growth and dissociation conditions. The operational modes involved (i) the incremental (step-wise) temperature cycling mode and (ii) the continuous temperature cycling processes, by applying the Isochoric Pressure-search method. Also, two different high pressure PVT configurations were used, of which one encompassed a stirred tank reactor of constant volume and the other incorporated an autoclave of constant volume with magnetic agitation. The determined (P-T) conditions for hydrate formation and dissociation, and the respective phase diagrams were compared with respect to the operational conditions, temperature cycling mode and utilized PVT configuration. The experimental findings were complemented by a thermodynamic simulation model, with the aim to resolve the phase diagrams including the CO2 dissolution over the entire range of the applied (P-T) conditions.
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