化学添加剂对水合物生成和储气的影响

为了研究促进剂对水合物生成的影响,采用自行设计的水合物反应系统,通过恒温定容实验,研究了四氢呋喃(THF)和十二烷基硫酸钠(SDS)对二氧化碳水合物生成的影响。并在实时测量水合物生成过程中系统的温度、压力的基础上,计算得出水合物的生成速率、储气量及表观水合数。结果表明,适宜浓度的SDS能促进气体在液相的溶解,提高水合物的生长速率和储气密度;单独添加THF对水合物生成过程促进效果并不明显;SDS和THF复合添加剂共同作用对水合物促进效果最显著。

Influence of chemical additives on hydrate formation and gas storage

In order to study effects of promoters on hydrate formation ,adopting a self-de-signed hydrate reaction system ,influences of the tetrahydrofuran （T HF ） and sodium dodecyl sulfate （SDS） on carbon dioxide hydrate formation were studied through experiments with con-stant temperature and volume .Hydrate formation rate ,gas storage capacity and the apparent hy-dration number were calculated on the basis of real-time measurements of system temperature and pressure in the process of hydrate formation .The result showed that the suitable concentra-tion of SDS can promote the dissolution of gas in the liquid phase ,and improve the grow th rate and gas storage density of hydrate . T HF only had little effect on hydrate generation process . Compound additives SDS and THF working together could promote the hydrate formation impor-tantly .