Thermodynamic study of CO2 hydrate formation in the presence of SDS and graphene oxide nanoparticles

Gas consumption rate is an important factor in the kinetic study of gas hydrate formation. In this study, the kinetics of the hydrate formation was examined in water + carbon dioxide + graphene oxide and water + carbon dioxide + graphene oxide + sodium dodecyl sulfate (SDS) systems. The experiments are carried out at 0.05 and 0.1% of graphene oxide nanoparticle weight and 400 mg/l SDS solution at 3.6 MPa and 4 MPa pressures and temperatures of 275.65, 277.65, and 279.65 K. The results show that as the pressure rises, graphene oxide is responsible for the increase in the storage capacity and gas consumption at constant temperature so that using graphene oxide at 0.1% weight increases the storage capacity by 4.2% and molar gas consumption by 3.8% at the pressure of 3.4 MPa compared to the 0.05% weight. When the surfactant, SDS with the concentration of 400 mg/l, is used, storage capacity and gas consumption increase by 38% and 26%, respectively.