Abstract: The kinetics of methane hydrate decomposition was studied using Sapphire cell apparatus. Two different ways were adopted to measure the kinetic data of methane hydrate decomposition at temperatures from 269-279K and pressures from 0.1-3.0MPa.It was revealed that the decomposition rate of methane hydrate was proportional to the difference between gas fugacity at the equilibrium state and that at the actual decomposing state.A new kinetic model for methane hydrate decomposition was developed. It was shown that calculated results by the model were in good agreement with experimental data.The activation energy of decomposition reaction for methane hydrate was determined as 73.3kJ·mol ^-1(methane).

摘要： 根据两种测量水合物分解动力学的方法———恒定分解压力法及压力变化法 ,采用气体水合物静力学实验装置测定了甲烷水合物的分解动力学数据 .由建立的分解动力学模型计算了甲烷水合物的分解速率 ,较好地拟合了所测得的实验数据 .实验数据验证了分解速率和水合物平衡压力下的逸度与实验压力下的逸度之差有关 ,计算的分解活化能为 73.3kJ·mol^-1(甲烷 ) .