热力学促进剂对瓦斯水合物相平衡的影响

Effect of thermodynamics promoters on phase equilibrium of mine gas hydrate

为研究热力学促进剂对瓦斯水合物相平衡的影响,利用全透明瓦斯水合分离实验装置,获取TBAB、THF和CP三种促进体系中瓦斯水合物生成的相平衡参数,结合Chen-Guo模型计算值分析实验数据。结果表明:三种热力学促进剂均能改善水合物相平衡条件,THF、TBAB和CP平均压降分别为36.5、14.9、5.1 MPa,最大压降分别为38.8、17.2、6.5 MPa,其影响效果由大到小依次为THF、TBAB、CP。

This paper is an effort to investigate the influence of thermodynamics promoters on the gas hydrate phase equilibrium.The investigation is performed by obtaining gas hydrate phase equilibrium parameters in three kinds of promotion system used in THF,TBAB and CP using a transparent experiment device for gas hydrate phase equilibrium;and analyzing the experimental data in combination with the calculated values of Chen-Guo model.Results show that the three thermodynamics promoters leads to an improvement in the conditions of hydrate phase equilibrium,suggesting an average pressure reductions of 36.5,14.9 and 5.1 MPa and the maximum pressure drops of 38.8,17.2 and 6.5 MPa respectively in the of THF,TBAB and CP,as occurs when the three thermodynamics promoters have an impact on the gas hydrate phase equilibrium in a descending order of THF,TBAB and CP.