表面活性剂促进CO_2水合物生成的实验及动力学模型

采用自行设计的水合物生成实验系统,在静态条件下,在十二烷基苯磺酸钠(SDBS)、十二烷基硫酸钠(SDS)体系中进行了CO2水合物生成的实验。考察了表面活性剂浓度对CO2水合物生成的影响;建立了CO2水合物生成动力学模型;分析了表面活性剂对CO2水合物生成促进作用机理。实验结果表明,SDBS和SDS均能缩短CO2水合物生成的诱导时间、提高生长速率和储气密度;SDBS比SDS具有更好的CO2水合物生成促进效果,两种添加剂的最佳用量分别为0.5,0.3 g/L;建立的CO2水合物生成动力学模型能对水合物生成过程进行准确预测。

Promoting Effects of Surfactants on Carbon Dioxide Hydrate Formation and the Kinetics

Carbon dioxide hydrate formation experiments were conducted in self-designed static sodium dodecyl benzene sulfonate(SDBS) and sodium dodecyl sulfat(SDS) systems separately.The effects of the surfactant concentrations on the carbon dioxide hydrate formation were investigated.A kinetic model for the carbon dioxide hydrate formation was established.The promoting mechanism of surfactants for the hydrate formation was analyzed.The experimental results indicated that both SDBS and SDS could shorten the induction time of the hydrate formation and could heighten the capability for storing carbon dioxide.The promoting effect of SDBS on the carbon dioxide hydrate formation is stronger than that of SDS.Their optimum dosages are 0.5 g/L and 0.3 g/L,respectively.