不同类型表面活性剂复配对水合物生成的影响

Effects of different types of surfactants on hydrate formation

表面活性剂的存在能够有效促进水合物的生成。研究了阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)、非离子表面活性剂烷基多糖苷(APG)和阴离子表面活性剂十二烷基硫酸钠(SDS)在7 MPa、275.15 K条件下以不同比例进行两两复配后对水合物生成的影响。结果表明,阴、阳离子表面活性剂复配后导致表面活性剂失活而抑制水合物的生成。非、阳离子表面活性剂复配后,随着CTAB所占比例的减小,水合物的储气密度增大。非、阴离子表面活性剂复配后效果最优,使储气密度达到135.81 V_(g)/V_(w),且随着SDS所占比例的减小,水合物的储气密度随之增大。

The presence of surfactant can effectively promote the formation of hydrate.The effects of pair mixing of cationic surfactant cetyltrimethylammonium bromide(CTAB),non-ionic surfactant alkyl polyglycoside(APG)and anionic surfactant sodium dodecyl sulfate(SDS)at different ratios at 7 MPa and 275.15 K on hydrate formation were studied.The results show that the combination of anionic and cationic surfactants leads to the deactivation of surfactants and inhibits the formation of hydrate.The gas storage capacity of hydrate increases with the decrease of CTAB ratio after the mixing of non-cationic and non-cationic surfactants.The gas storage capacity reached 135.81 V_(g)/V_(w)after the combination of non-anionic surfactants and anionic surfactants.The gas storage capacity of hydrate increased with the decrease of SDS ratio.