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Experimental study on kinetic characteristics of CO2 hydrate formation in 1,3-dioxolane solution systems
- Low-Carbon Chemistry and Chemical Engineering Vol. 51, Issue 2, Pages: 137-144(2026)
- 作者机构：
1.重庆大学 煤矿灾害动力学与控制全国重点实验室，重庆 400044
2.重庆大学 资源与安全学院，重庆 400044
- 作者简介：
- 基金信息：
DOI：10.12434/j.issn.2097-2547.20250132
CLC： TE991.1;X701Received：24 March 2025，
Revised：2025-04-01，
Published：25 February 2026
- 稿件说明：
移动端阅览
韩玉婷,吴良猛,钟栋梁等.1,3-二氧戊环溶液体系CO2水合物生成动力学特性实验研究[J].低碳化学与化工,2026,51(2):137-144.
HAN Yuting,WU Liangmeng,ZHONG Dongliang,et al.Experimental study on kinetic characteristics of CO2 hydrate formation in 1,3-dioxolane solution systems[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(2):137-144.
韩玉婷,吴良猛,钟栋梁等.1,3-二氧戊环溶液体系CO2水合物生成动力学特性实验研究[J].低碳化学与化工,2026,51(2):137-144. DOI： 10.12434/j.issn.2097-2547.20250132.
HAN Yuting,WU Liangmeng,ZHONG Dongliang,et al.Experimental study on kinetic characteristics of CO2 hydrate formation in 1,3-dioxolane solution systems[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(2):137-144. DOI： 10.12434/j.issn.2097-2547.20250132.
摘要
改善CO
2
水合物生成动力学是提升水合物法捕集CO
2
效率的关键。从宏观与微观两个层面，研究了1
3-二氧戊环（DIOX）溶液中CO
2
水合物生成动力学特性，包括气液比（反应釜内气相与液相体积之比）、反应温度和DIOX浓度（物质的量分数，下同）对水合物生成动力学参数（诱导时间和气体消耗量等）的影响，并利用显微可视系统探讨了DIOX溶液中CO
2
水合物生成机理。结果表明，增大气液比有助于增强CO
2
在液相中的传质，促进CO
2
水合物生成，气液比为2.33时诱导时间最短（18 min）。提高反应温度能够增大CO
2
气体消耗量，但反应温度过高会降低CO
2
水合物生成速率，277.15 K时气体消耗量达到最大（26.04 mmol/mol）。增大DIOX浓度能够促进CO
2
水合物生成，DIOX浓度为5.56%时促进效果最佳。实验初始阶段，CO
2
会迅速溶解于DIOX溶液中，水合物首先在气液界面生成，随后持续向下生长，形成糊状水合物，并呈现上层致密、下层稀疏的空间分布特征。本研究可为CO
2
水合物生成动力学优化提供参考。
Abstract
Kinetics enhancement of CO
2
hydrate formation is the key to improving the efficiency of CO
2
capture via the hydrate-based method. The kinetic characteristics of CO
2
hydrate formation in 1
3-dioxolane (DIOX) solution were investigated from both macro- and microscopic perspectives
including the effects of gas-liquid ratio (ratio of gas-phase volume to liquid-phase volume in the reactor)
reaction temperature and DIOX concentration (mole fraction
the same below) on key kinetic parameters such as induction time and gas consumption. The mechanism of CO
2
hydrate formation in DIOX solution was also explored using a microscopic visualization system. The results show that increasing the gas-liquid ratio enhances CO
2
mass transfer in the liquid phase and promotes CO
2
hydrate formation
with the shortest induction time of 18 min obtained at a gas-liquid ratio of 2.33. Increasing the reaction temperature can increase gas consumption
but excessively high temperatures can reduce the hydrate formation rate. The maximum gas consumption of 26.04 mmol/mol is achieved at 277.15 K. Increasing the DIOX concentration promotes CO
2
hydrate formation
with the best promotion effect observed at 5.56%. At the initial stage of the experiment
CO
2
rapidly dissolves in the DIOX solution
and hydrates first form at the gas-liquid interface. The hydrates then grow continuously downward
forming pasty hydrates and exhibiting a spatial distribution characterized by a dense upper layer and a sparse lower layer. This study provides a theoretical basis for optimizing the kinetics of CO
2
hydrate formation.
关键词
Keywords
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