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基于瓦斯水合分离实验,研究了3种THF-SDS复配体系(THF,0.50mol/L,SDS,0.20,0.35和0.50mol/L)对3种合成瓦斯气样(Ⅰ型、Ⅱ型和Ⅲ型)水合分离过程影响,并对THF-SDS复配体系的促进机理进行了初步分析.结果表明:在THF-SDS复配溶液中,φ(CH4)分别为24.90%,40.40%和59.80%的气样经过一级水合分离后,φ(CH4)分别提高13.81%,15.63%和20.04%;THF-SDS复配体系可以改善瓦斯水合分离热力学条件,有效缩短瓦斯水合物生成的诱导时间,随着复配体系中SDS浓度的升高,诱导时间逐渐缩短;然而随着THF-SDS复配体系中SDS浓度的增加,水合物中瓦斯气体含量减少,分离效果变差,高浓度的SDS对CH4-N2-O2-THF-H2O体系水合物晶体生长过程有一定抑制作用.
Based on gas hydration separation experiments, the effects of three THF-SDS complex systems (THF, 0.50 mol / L, SDS, 0.20, 0.35 and 0.50 mol / L) The results showed that φ (CH4) was 24.90%, 40.40% and 59.80% respectively in THF-SDS complex solution After CH4 was increased by 13.81%, 15.63% and 20.04% respectively, the THF-SDS complex system could improve the thermodynamic conditions of gas hydration and separation and effectively shorten the induction time of gas hydrate formation. However, with the increase of SDS concentration, the content of gas in hydrate reduced and the separation effect deteriorated. High concentrations of SDS could inhibit the growth of CH4- N2-O2-THF-H2O system hydrate crystal growth process has a certain inhibitory effect.