冰点以下多孔介质中CO2水合物生成特性的实验研究

多孔介质对CO2水合物的生成过程具有明显的影响。为了研究冰点以下多孔介质中CO2水合物的生成特性，利用1.8L的高压水合反应釜研究了粒径分别为380 μm、500 μm和700 μm的多孔介质中CO2水合物的生成过程。结果表明：多孔介质对冰点以下CO2水合物的生成过程产生重要的影响。与粒径分别为500 μm和700 μm的多孔介质体系相比，粒径为380 μm的多孔介质中CO2水合物的平均生成速率和储气量分别达到了0.01614 mol/h和65.094 L/L。研究结果还表明，当多孔介质粒径在380 μm到700 μm之间时，多孔介质粒径越小，多孔介质中水合物生成过程的平均生成速率和储气量就越大。

Experimental Study on the Formation Characteristic of CO2 Hydrate in Porous Media below the Freezing Point

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 1.6-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 0.01614 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.