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.