中文摘要：

为了探寻有效改善瓦斯水合分离动力学条件的方法,本文研究了十二烷基硫酸钠（SDS）和高岭土对瓦斯水合物生成过程及CH4分离效果的影响。实验获取了低浓度瓦斯在4个体系中,即：SDS质量分数为10.34%的SDS溶液及高岭土质量分数为1.47%、5.64%和8.23%的SDS-高岭土复配溶液中瓦斯水合物生成过程压力-温度-时间（p-T-t）曲线,利用气相色谱仪测定了分离产物中CH4的浓度。结果表明：SDS和SDS-高岭土复配体系缩短了瓦斯水合物生成诱导时间,提高了瓦斯水合物生成速率。4个体系中,瓦斯水合物生成诱导时间最短为72min,平均生成速率最大可达5.261×10^-6m^3·h^-1;一级水合分离产物中CH4浓度比原料气提高了12.40%～20.61%;在SDS-高岭土复配溶液中,瓦斯水合物分形生长,CH提纯浓度最高可达58.41%。

英文摘要：

The effects of sodium dodecyl sulfate （SDS） and the mixture of SDS and crystal seed kaolin on mine gas hydrate formation and CH4 separation were investigated to improve the dynamic conditions of mine gas hydrate formation. The pressure-temperature-time （p-T-t） curves for low concentration mine gas in hydrate formation were obtained in four test systems. The test systems are SDS solution with mass fraction of 10.34% and mixture of SDS with kaolin with three different mass fractions of 1.47%, 5.64% and 8.23%, respectively. CH4 concentrations in separation residues were analyzed by using gas chromatography. The results showed that the induction time was shortened and the hydrate formation rates increased by adding SDS and the mixture of SDS and kaolin~ the shortest induction time and the largest mean formation rate in four systems, were 72 min and 5. 261 × 10^-6 m^3 · h^-1, respectively; the concentrations of CH4 increased by 12.40G through 20.61% after first separation; the highest separation concentration of CH4 increased up to 58.41% in mixture system of SDS and kaolin, with fractal growth of mine gas hydrate existing in the systems.