多孔介质内甲烷水合物生成动力学研究

Kinetics of methane hydrate formation in porous media

中文关键词: 气体水合物  成核  生长  生成动力学

英文关键词: Gas hydrate  nucleation  growth  formation kinetics

中文摘要:

      天然气水合物作为一种潜在的新型潜在替代能源，分布广泛、储量巨大。水合物生成动力学特性对于了解自然界天然气水合物形成规律与水合物相关技术应用具有重大意义。本文针对甲烷水合物生成动力学特性进行研究，设计开发了甲烷水合物生成测试系统，研究了不同温度和不同孔隙粒径的多孔介质对于水合物生成动力学的影响。结果表明，随着温度的降低以及多孔介质孔隙粒径的减小，甲烷水合物生成过程中的气体消耗速率越快，生成结束时消耗的气体的量越多。同时，利用水合物生成多步骤机制模型，获得了甲烷水合物生成过程各中间产物的变化规律。

英文摘要:

      As a potential new alternative energy, natural gas hydrate is widely distributed and has huge reserves. The kinetic characteristics of hydrate formation are of great significance for understanding the laws of natural gas hydrate formation in nature and the application of hydrate technology. In view of the kinetic characteristics of methane hydrate formation, methane hydrate formation test system was designed and developed. The effects of porous media with different particle size and different temperature on the kinetics of hydrate formation were studied. The results show that with the decrease of temperature and the decrease of particle size of porous media, the rate of gas consumption was faster during the formation of methane hydrate, and the more gas were consumed at the end of the formation. At the same time, by using the multi-step mechanism model of hydrate formation, the change rules of the intermediate products in the process of methane hydrate formation were obtained.