Research On The Kinetics Of Methane Hydrate Formation In Kinetic Inhibitor Systems

The kinetics of methane hydrate formation in the systems containing kinetic inhibitors was investigated in this paper. The work can be divided into five parts.In the first part, the status of research on the kinetics of hydrate formation, thermodynamic inhibition and kinetic inhibition were briefly reviewed. The molecular simulations on the crystal structures, properties, formation and kinetic inhibitors of hydrate were discussed.In the second part, the kinetic data of hydrate formation in pure water and the systems containing kinetic inhibitors was obtained. The kinetic inhibitors, PVP and VC-713, were used in experiments. The experiments were conducted at temperatures range extends from 273.85 to 273.95K, pressures from 4.47 to 7.003MPa and the inhibitor concentrations from 0.1 to 1.5%(mass).In the third part, the factors that affected hydrate formation such as pressure, temperature and inhibitor concentration were analyzed in detail.In the fourth part, the application of Hu-Qiu model to the systems containing kinetic inhibitors were demonstrated. The kinetic parameters and the representative data of the experiments were gained.In the last, the effect of pressure, temperature and inhibitor concentration on the estimated kinetic parameters was determined. The capability of the kinetic model for the prediction of hydrate formation was tested with the measured data. It shows that the model is capable of describing the behavior of hydrate formation in kinetic inhibitor systems with good accuracy. Combined with the mechanism of hydrate formation, the inhibition process was explained from the point of structure and energy. Then a novel academic viewpoint was developed to explain the inhibition mechanism of kinetic inhibitors.