水合物分离二氧化碳气体的研究

气体水合物是在一定的温度和压力下由气体分子填充水分子产生的晶格而形成的一种笼形晶体.这种水结晶体具有高密度的特性使其成为诸多基于气体水合物应用技术的基础.利用气体水合物生成的原理,将空气中的二氧化碳分离出来,并以气体水合物的形式储存在海洋深处.对二氧化碳气体水合物的生成过程和表面活性剂的促进作用进行了实验研究.选取十二烷基硫酸钠(SDS)、十二烷基苯磺酸钠(SDBS)、对甲苯磺酸(p-TSA)三种表面活性剂进行了二氧化碳气体水合物生成的促进研究,确定了促进气体水合物生成的机理与途径.结果表明:三种表面活性剂在一定的程度上都能缩短气体水合物生成的诱导时间,提高了气体水合物的生成速率.

Research on Separation of Carbon Dioxide by Gas Hydrate

Gas hydrate, a kind of clathrate, is an ice-like solid material form when gas or gas mixture is in contact with aqueous solutions or ice under high pressure and at low temperature. The character of high density of the water crystalline makes itself the basis of application technologies based on gas hydrate. Carbon dioxide can be separated through forming gas hydrate, and carbon dioxide gas hydrate can be stored in seabed. The effect of surfactant on carbon dioxide gas hydrate formation has been investigated exprimentally. Sodium dodecyl sulfonate (SDS) , sodium dodecyl benzene sulfonate(SDBS) and para-toluene sulfonic acid(p-TSA) were selected as surfactant. The mechanisms and ways of promotion have been determined. The results show that three surfactants can reduce the induction time of carbon dioxide gas hydrate formation, and increase the growth rate of carbon dioxide gas hydrate.