天然气水合物大多赋存于海底沉积层或永久冻土带的沉积层孔隙中。用0.5~1 mm和2~4 mm 2种粒径的二氧化硅（SiO₂）颗粒模拟真实环境，并量取不同体积SiO₂分别与300 mg/L的十二烷基硫酸钠（SDS）进行复配，考察了不同体积的二氧化硅颗粒与SDS的复配体系对水合物生成过程的影响；探究不同初始压力对该体系的影响。结果表明，加入二氧化硅颗粒后能够缩短水合物的诱导时间；同体积2~4 mm二氧化硅颗粒生成水合物的剩余压力均要低于0.5~1 mm粒径；2种粒径中都是50 mL的颗粒中剩余压力最低、储气效果更好；此外，水合物在较高的初始压力下生成效果最好。

Natural gas (methane) hydrates are mostly found in the pores of the sediments of seafloor or permafrost. Two kinds of silica (SiO₂) particles with diameters of 0.5-1 mm and 2-4 mm, respectively are used to simulate the real environment for methane hydrates. Different volumes of silica particles are mixed with 300 mg·L^-1 sodium dodecyl sulfate (SDS). The effects of silica particles-SDS complex system on methane hydrate formation process are investigated, and the impacts of different initial pressure on the system are explored. The results show that the addition of silica particles can greatly shorten the induction time of hydrates and overall reaction time. The pressure for 2-4 mm silica particles to form hydrates shall be less than that for 0.5-1 mm silica particles under the same volume. Among different volumes, 50 mL of both sizes of particles have the lowest residual pressure and the best gas storage effect. In addition, hydrates form best at higher initial pressures.

黄仙智(1995-),女,硕士研究生,研究方向为天然气水合物,2633516537@qq.com