文献类型：期刊文献

中文题名：热力学和动力学促进剂下CO_(2)水合物动力学与形貌研究

英文题名：Kinetics and morphology of CO_(2) hydrates under thermodynamic accelerator and kinetic accelerator

作者：吴昱辰[1];左晓琳[1];王兴军[1,2];郭庆华[1,2];于广锁[1,2];王辅臣[1,2]

机构：[1]华东理工大学资源与环境工程学院,上海200237;[2]洁净煤技术研究所,上海200237

年份：2025

卷号：53

期号：8

起止页码：77

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：;北大核心:【北大核心2023】；

基金：国家自然科学基金联合基金资助项目(U21A20319)。

语种：中文

中文关键词：水合物;可视化;水合物膜;生成路径;标准气体吸收量

外文关键词：hydrate;visualization;hydrate film;formation path;standard gas absorption capacity

摘要：CO_(2)水合物具有稳定性好、力学强度高、储气量大等优势,有望成为实现碳达峰、碳中和的有效途径之一,但CO_(2)水合物生成过程速率低,需对CO_(2)水合物生成过程的影响因素进行深入研究。文中通过可视化实验,探究SDS(十二烷基硫酸钠)与TBAB(四丁基溴化铵)复配溶液中CO_(2)水合物生成过程。结果表明:在有机械搅拌的条件下,TBAB和SDS组成的复配溶液体系的水合物生成呈现清晰的阶段性。在诱导期间,气液界面出现明显的水合物膜,随后溶液快速浑浊,溶液内迅速生成大量的小水合物絮凝体,表明CO_(2)水合物成核并进入水合物生长阶段,并提出以水合物膜为关键步骤的生成路径;在271.15—275.15 K水浴温度以及3.0—4.0 MPa初始压力区间范围内,随着温度的降低、压力的升高,过冷度不断提高,水合物生成过程的耗气量以及标准气体吸收量呈上升趋势,标准气体吸收速率的极大值也随之增加。
CO_(2) hydrate is considered as one of the effective ways to achieve carbon peak and carbon neutrality for the advantages of good stability,high mechanical strength and large gas storage.However,the low formation rate of CO_(2) hydrate limits its industrial applications.The process of CO_(2) hydrate formation in the complex solution of SDS(sodium dodecyl sulphate)and TBAB(tetrabutylammonium bromide)was investigated through visualisation experiments.The results reveal that under the condition of mechanical stirring,the hydrate formation of the complex solution system composed of TBAB and SDS shows a clear stage.A clear hydrate film appears at the gas-liquid interface during the induction period,followed by a rapid turbidity of the solution,and dramatic small hydrate flocs are rapidly formed in the solution at the end of the induction,indicating CO_(2) hydrate nucleation occurs and subsequently enter the hydrate growth stage.The appearance of hydrate film is the key step of formation path.In the range of 271.15-275.15 K of the water bath temperature and 3.0-4.0 MPa of the initial pressure,the subcooling increases with temperature decreasing and pressure increasing,and the gas consumption as well as the standard gas absorption capacity for the hydrate formation process are on an upward trend,and the maximum value of the standard gas absorption rate increases.