The maximum methane storage capacity (MSC) is of critical importance of methane hydrate to store methane. This paper reports the effects of vesicle solutions, formed through combination of carboxylate surfactants with cationic quaternary ammonium salt including hydroxypropyl trimethyl ammonium chloride chitosan (HACC) or dodecyl trimethyl ammonium chloride (DTAC), on the formation of methane hydrate. It was found that vesicles could raise the maximum MSC of hydrate by about 10 (V/V, the volume of methane stored by one volume of hydrate) at appropriate anion and cation concentrations. For example, at 800 ppm (parts per million) of sodium laurate (SL) and 600 ppm of HACC concentrations, the formed vesicles could elevate the maximum capacity to 151 V/V, 5.3% higher than that of sodium laurate alone. The vesicles formed could increase the maximum MSC, from 136 V/V to 147 V/V by sodium oleate (SO) and HACC, 145 V/V to 153 V/V by sodium decanoate (SD) and HACC and 137 V/V to 149 V/V by SO and DTAC. The reason for the enhancement is that the large hydrophobic space of the vesicles could solubilize methane molecules and facilitate them to contact with water molecules.

最大甲烷储存容量（MSC）对于甲烷水合物储存甲烷至关重要。本文报道了通过羧酸盐表面活性剂与阳离子季铵盐（包括羟丙基三甲基氯化铵壳聚糖（HACC）或十二烷基三甲基氯化铵（DTAC））组合形成的囊泡溶液对甲烷水合物形成的影响。发现在适当的阴离子和阳离子浓度下，囊泡可以将水合物的最大 MSC 提高约 10（V/V，一体积水合物储存的甲烷体积）。例如，在 800 ppm（百万分率）的月桂酸钠 (SL) 和 600 ppm 的 HACC 浓度下，形成的囊泡可以将最大容量提升至 151 V/V，比单独使用月桂酸钠的容量高 5.3%。形成的囊泡可以增加最大的MSC，油酸钠 (SO) 和 HACC 从 136 V/V 到 147 V/V，癸酸钠 (SD) 和 HACC 从 145 V/V 到 153 V/V，SO 和 DTAC 从 137 V/V 到 149 V/V . 增强的原因是囊泡的大疏水空间可以溶解甲烷分子并促进它们与水分子接触。