RC1e和ReactIR测试四氢呋喃形成水合物过程

Hydrate formation process of tetrahydrofuran tested by RC1e and ReactIR

采用水合物研究中的THF测试方法,利用RC1e量热反应系统和ReactIR在线分析系统在线监控了四氢呋喃水溶液体系降温并形成水合物的过程,并考察了形成水合物溶液体系温度、热量以及内部组成的变化。实验结果表明:19%的四氢呋喃水溶液体系在-4℃形成水合物晶核,并因相变而释放大量的热,造成溶液体系温度上升;在形成水合物晶核时,在四氢呋喃的诱导作用下,水分子间多以氢键相互作用,形成水合物结构的基础。溶液体系热量和红外变化结果在一定层面上描述了四氢呋喃溶液形成水合物的过程和作用机理,可为今后防治管道内天然气水合物的堵塞提供理论基础。

THF test method in the hydrate research is used to conduct online monitoring of temperature drop and hydrate formation process of tetrahydrofuran aqueous solution system by RC1e calorimetry reaction system and ReactIR online analysis system and study the changes of temperature,heat and internal composition in the formation of hydrate solution system.Experimental results show that 19% tetrahydrofuran aqueous solution system forms hydrate crystal nucleus at-4℃ and releases a large amount of heat due to the phase change,causing temperature rise of the solution system.In the formation of hydrate crystal nucleus,under the induction of tetrahydrofuran,more water molecules are subject to interaction by hydrogen bonds to form the basis of hydrate structure.Solution system heat and infrared change results describe the process and action mechanism of hydrate formation in the tetrahydrofuran solution on a certain level,which can provide a theoretical basis to the future prevention of hydrate plugging in the natural gas pipeline.