Investigation of Carbon Dioxide Hydrate Formation Kinetics in Stirred Reactor at Isochoric Conditions

There are two approaches to study the gas hydrates, thermodynamics and kinetics. Although considerable studies have been conducted on the thermodynamic of gas hydrates, the kinetics of gas hydrates is still ambiguous and different researchers have proposed different approaches. In this work, carbon dioxide gas hydrate formation has been studied at isochoric and isothermal conditions in a stirred reactor. Based on experimental data, mass transfer coefficients were calculated for each experiment using the mass transfer approach model. The results illustrated that in the growth stage of hydrate crystals, gas consumption rate is almost constant. It was shown that mass transfer coefficient is directly affected by the pressure. It can be concluded that the mass transfer approach, can be used to model or predict the formation of CO2 hydrate in such experimental system. The benefit of the mass transfer approach is simplification of governing equations and avoiding from sophisticated modeling as it can be found in literature.