SDS/THF体系下CO_(2)水合固化的动力学特性

Kinetic characteristics of CO_(2) hydration and curing with SDS/THF system

为研究SDS/THF对CO_(2)水合物动力学特性的影响,充分考虑固、液、气三相状态下CO_(2)的溶解特性,依据水合反应关系方程和Clausius-Clapeyron方程,建立了CO_(2)水合物耗气模型,研究了SDS/THF复配体系对CO_(2)水合物诱导时间、耗气量和耗气速率的影响。实验结果表明:SDS/THF能够改变CO_(2)水合物形成过程,与THF摩尔分数为1.0%体系相比,SDS/THF体系对水合物耗气量的提升不明显,但可大幅提高初始阶段水合物耗气量和耗气速率;SDS/THF可小幅缩短水合物诱导时间,诱导时间缩短了1.0~2.4 min。该研究可为高二氧化碳矿井抽采CO_(2)气体快速回收封存提供一定借鉴。

This paper aims to study the effect of SDS/THF on the kinetic characteristics of CO_(2)hydrate.The study involves establishing CO_(2)hydrate gas consumption model according to the hydration reaction equation and Clausius-Clapeyron equation,on the basis of dissolution characteristics of CO_(2)in solid,liquid and gas phases;studying the effects of SDS/THF complex system on CO_(2)hydrate induction time,gas consumption and gas consumption rate.The experimental results show that SDS/THF can change the formation process of CO_(2)hydrate,and compared with system of THF mole fraction is 1.0%,SDS/THF system does not significantly increase the gas consumption of hydrate,but can greatly increase the gas consumption and gas consumption rate of hydrate at the initial stage;SDS/THF can slightly shorten the induction time of hydrate by 1.0-2.4 min.The study can provide reference for the rapid recovery and storage of CO_(2)gas extracted from high carbon dioxide mines.