Film growth kinetics data of methane hydrate were measured by a suspended gas bubble in water over the temperature and pressure ranges of 273.4～279.4 K and 3.60～11.90 MPa, respectively. The dimensionless Gibbs free energy difference (－ΔG^exp/RT) was used as the driving force to correlate the experimental data and a model involving parameters of physical significance for hydrate film growth kinetics was proposed. The reaction order (n＝1.60), apparent activation energy (55.95 kJ•mol^－1) and pre-exponential factor (1.65×10¹¹ mm²•s^－1) of methane hydrate film growth kinetics was regressed. Meanwhile the influences of temperature and pressure upon the film growth rate of methane hydrate were also discussed.

Key words: methane, hydrate, suspended bubble, kinetics, activation energy