中文摘要：

Porous medium has an obvious effect on the formation of carbon dioxide hydrate. In order to study the characteristics of CO2 hydrate formation in porous medium below the freezing point, the experiment of CO2 hydrate formation was conducted in a high-pressure 1.8-L cell in the presence of porous media with a particle size of 380 μm, 500 μm and 700 μm, respectively. The test results showed that the porous medium had an important influence on the process of CO2 hydrate formation below the freezing point. Compared with porous media with a particle size of 500 μm and 700 μm, respectively, the average hydrate formation rate and gas storage capacity of carbon dioxide hydrate in the porous medium with a particle size of 380 μm attained 0.016 14 mol/h and 65.094 L/L, respectively. The results also indicated that, within a certain range of particle sizes, the smaller the particle size of porous medium was, the larger the average hydrate formation rate and the gas storage capacity of CO2 hydrate during the process of hydrate formation would be.

英文摘要：

Porous medium has an obvious effect on the formation of carbon dioxide hydrate. In order to study the characteristicsof CO2 hydrate formation in porous medium below the freezing point, the experiment of CO2 hydrate formation wasconducted in a high-pressure 1.8-L cell in the presence of porous media with a particle size of 380 μm, 500 μm and 700 μm,respectively. The test results showed that the porous medium had an important influence on the process of CO2 hydrate formationbelow the freezing point. Compared with porous media with a particle size of 500 μm and 700 μm, respectively, theaverage hydrate formation rate and gas storage capacity of carbon dioxide hydrate in the porous medium with a particle sizeof 380 μm attained 0.016 14 mol/h and 65.094 L/L, respectively. The results also indicated that, within a certain range ofparticle sizes, the smaller the particle size of porous medium was, the larger the average hydrate formation rate and the gasstorage capacity of CO2 hydrate during the process of hydrate formation would be.