季铵盐对煤层气水合物相平衡条件的影响

发布时间：2018-05-15 22:09

本文选题：水合物 + 煤层气　；参考：《过程工程学报》2017年04期

【摘要】：对四甲基氟化铵(TMAF)、四甲基氯化铵(TMAC)、四甲基溴化铵(TMAB)、四丁基氟化铵(TBAF)和四丁基氯化铵(TBAC)五种季铵盐在低浓度含氧煤层气[30%CH4+65%N2+5% O_2(mol)]中形成水合物的热力学促进作用进行了实验研究,采用恒容压力搜索法得到每种季铵盐在浓度0.17%,0.29%,0.62%,1.38%,3.5%(mol)、温度282.3~304.5 K、压力0.919~8.435 MPa条件下的水合物相平衡数据,从季铵盐浓度、季铵盐卤素离子种类及季铵盐烷基种类3个方面综合比较了5种季铵盐的热力学促进效果.结果表明,5种季铵盐均能改善煤层气水合物形成的热力学条件,最佳促进效果3.5%TBAF0.62%TMAF3.5%TBAC1.38%TMAB1.38%TMAC,季铵盐卤素离子的促进作用氟离子氯离子或溴离子,季铵盐烷基的影响丁基甲基.
[Abstract]:The thermodynamic effects of five quaternary ammonium salts (TMAF, TMAF, TMA, TMA, TBA, TBA, TBA) on the formation of hydrates in low concentration (30%CH4 65%N2 5% O 2 mol) were studied in the presence of five quaternary ammonium salts. Using constant volume pressure search method, the hydrate phase equilibrium data of each quaternary ammonium salt at 0.17 ~ 0.29 ~ 0.62 and 1.38 and 3.5mol ~ (-1), 282.3n ~ 304.5 K and 0.919 ~ 8.435 MPa were obtained, respectively, from the concentration of quaternary ammonium salt. The thermodynamic promotive effects of five quaternary ammonium salts were comprehensively compared in three aspects: halogen ion species and alkyl groups of quaternary ammonium salts. The results showed that all five quaternary ammonium salts could improve the thermodynamic conditions for the formation of coal-bed methane hydrates, and the best promotion effect was 3.5TBAF0.62TMAF3.5TBAC1.38TMAC1.38TMAC1.38TMAC1.38TMAC1.38TMAC, the promotion of halogen ions of quaternary ammonium salts by fluorine chloride ions or bromine ions, and the influence of quaternary ammonium salt alkyl groups on Ding Ji methyl.
【作者单位】：太原理工大学化学化工学院;
【基金】：国家自然科学基金资助项目(编号:51106104) 山西省自然科学基金资助项目(编号:2120210022-5)
【分类号】：TD712

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