THF-SDS对瓦斯水合分离过程温度场分布影响

Effect of THF-SDS on the temperature field distribution of mine gas hydrate separation process

为探究THF-SDS复配溶液对瓦斯水合反应过程温度场影响,利用配备阵列式温度传感器的水合反应装置,研究了3组促进剂溶液(1 mol/L THF,1 mol/L THF+0.02 mol/L SDS,1 mol/L THF+0.1 mol/L SDS)体系中瓦斯混合气(85%CH4,7%N2,3%O2,5%CO2)水合分离过程温度场分布特征。结果表明:瓦斯水合体系中SDS浓度增加,反应放热速率呈递增趋势(0.030~0.230 k J/min);反应热导致水合体系温度分布发生变化,体系上层温度最高,下层温度最低,体系中SDS浓度越高,温度梯度越明显;瓦斯水合物导热系数随体系温度分布发生改变(0.529~0.534 W/(m·K)),SDS浓度越高,瓦斯水合物导热系数越大。分析认为,THF-SDS复配溶液改善了瓦斯水合分离热力学条件,提高了气-水转化率,影响了不同水合体系温度场分布。

To explore the effect of THF-SDS complex solution on the distribution characteristics of the temperature field in gas hydrate reaction process,using the hydration reaction apparatus with arraying temperature sensors,distribution characteristics of temperature field in hydrate separation process of gas mixtures(85% CH4,7% N2,3% O2,5% CO2)in three groups of promoter solution(1 mol / L THF,1 mol / L THF + 0. 02 mol / L SDS,1 mol / L THF + 0. 1 mol / L SDS) were investigated. Studies show that accompanying the increasing of the SDS concentration of the gas hydration systems,the exothermic reaction rate shows an increasing trend(0. 030- 0. 230 k J / min). The reaction rate changes results in the variation of the temperature distribution in the hydration systems,the upper temperature is the highest and the lower is the lowest in the system,and the higher the SDS concentration is,the more significant temperature gradient is. Gas hydrate thermal conductivity changes while the temperature distribution(0. 529- 0. 534 W /( m·K)) is altering,and the higher the SDS concentration is,the greater the gas hydrate thermal conductivity is. Analysis suggests that THF- SDS complex solution improves the thermodynamic conditions of gas hydrate separation process,advancesthe air-water conversion rate,and affects the temperature field distribution of different hydration systems.