Abstract:

In order to study the effects of surfactant，sodium dodecyl sulfate (SDS), on formation of new-type cool storage medium-isobutene gas hydrates, a small agitating type gas hydrate preparation apparatus was designed.With the constant volume method, the isobutene gas hydrates formation with and without surfactant SDS was studied.Results showed that compared with the situation without SDS, the induction time decreased by 18min with SDS, and the gas fraction in formed hydrate increased，because surfactant SDS can effectively reduce the interfacial tension of gas-water contact and accelerate the rate of gas molecules’ entering into gas-water interfacial layer.Besides, the induction time was very close(about 20 min) under different SDS concentrations (0.8×10^-3,1.0×10^-3 and 1.2×10^-3), and the amount of formed hydrate tended to coincide.

摘要：

为探讨表面活性剂十二烷基硫酸钠 (SDS)对新型蓄冷工质——异丁烷水合物快速生成的影响，利用自行设计的小型搅拌式水合物制备系统，在定容法实验条件下，比较无SDS情况下和不同SDS浓度情况下水合物的生成特性。实验结果表明: 与无SDS情况下相比,有SDS情况下的异丁烷水合物诱导时间缩短约18 min, 且水合物生成量较多,含气率较大,主要是SDS能有效降低水气界面的界面张力,增快气体分子进入水气界面层速率。此外，不同SDS浓度下(0.8×10^-3、1.0×10^-3和1.2×10^-3)水合物生成诱导时间比较接近(约20 min),且水合物生成量趋于一致。