(181am) CO2 + H2O + 1-Propanol Semiclathrate Hydrate Phase Equilibrium

Clathrate hydrates are ice-like crystalline compounds wich form through a combination of water "host" and suitably sized "guest" molecules, tipically under low temperatures and elevated pressures. In clathrate hydrates, water molecules form hydrogen-bonded cavity structures encapsulating the guest molecules. Gas hydrates could cause operational problems in the chemical industry. To inhibit the formation of gas hydrates, glycols and alcohols are normally used. The knowledge about gas hydrate phases equilibrium in the presence of an inhibitor is of interest to calculate the limit of hydrate formation. In this work, we first describe the detail of an experiment for measuring the dissociation conditions of CO₂ + 1-propanol (5 and 10 %wt) + H₂O clathrate hydrates; then, we report the dissociation conditions at temperatures between (273 and 280) K and pressures up to 5 MPa, which were measured by an isochoric pressure-search method. The reported experimental values are compared with some selected experimental data from the literature and the agreement is found to be acceptable.