【摘要】 设甲烷分子占据5个小格(3个512和2个435666),最大的格子(1个51268)由较大的可溶性烷烃(新己烷)分子所填充,计算结构H型天然气水合物储存甲烷气的最大潜能,为201sm3/m3,相当于-162℃下甲烷气储藏容量的1/3;在甲烷气只占据小孔穴的情况下,结构H型水合物储藏甲烷气的潜能大于结构Ⅰ型和Ⅱ型水合物(分别为56和154sm3/m3)。在震动室反应器装置中测定了结构H型水合物的储藏能力,加入0.1%卵磷脂或聚乙烯基吡咯烷酮(PVP)使等容、压力补偿、恒压条件下转换成水合物的水量增加,即形成的天然气水合物的量增加,而且卵磷脂促进水合物形成的作用强于PVP。等容条件下结构H型天然气水合物形成和分解的压力～温度关系曲线表明,在PVP特别是卵磷脂存在下,水合物形成中压力降较大,形成的水合物融化和分解温度都较高,即水合物的稳定性较大。图3表2参9。更多还原

【Abstract】 Supposing that the methane molecules occupy five small cages (three 5¹² and two 4³5⁶6³) while a larger soluble alkane （neohexane） molecule—the largest cage (one 5¹²6⁸) in the cage model, the maximal storage capacity of methane in gas hydrate of structure H thus calculated theoretically accounts 201 standard cubic meters per cubic meter of cage volume and, in cases that methane molecules occupy only the small cages in the cage model, is higher than that in hydrates of structure Ⅰ and Ⅱ, being of 56 and 154 sm³/m³, respectively. The storage behavior of gas hydrate of structure H is investigated experimentally in a rocking cell reactor and it is shown that introducing 0.1% lecithin or polyvinylpyrrolidone （PVP） leads to increasing the quantity of water converted into hydrate of structure H, that is, the quantity of the hydrate formed under conditions isochoric, isobaric and of pressure compensation while the promotion of hydrate formation by lecithin is stronger than that by PVP. The pressure-temperature relationship of isochoric formation of methane hydrate of structure H indicates that at the presence of lecithin and, in less extent, PVP, larger pressure drop in hydrate formation is observed and the hydrate formed has higher melt and decomposition temperatures and is more stable. "更多还原