CO_2水合物生成流动参数及形态变化的研究

在自行设计的高压水合物循环实验环路装置上进行了CO_2水合物生成实验,研究了CO_2水合物生成过程中流动参数的变化规律,并根据水合物的形态变化对其生成机理进行了分析。实验结果表明,实验过程中温度、压力在同一时刻突变,CO_2水合物在整个循环管路内几乎同时生成;循环回路中的压差随反应的进行先增大后减小;CO_2水合物生成诱导时间随体系压力的升高、流量的增加逐渐缩短,同时高压力、大流量也加快了诱导时间缩短的速率。实验结果对深水流动保障水合物控制技术与深水天然气水合物管道输送技术的研究具有意义。

Changes of flow parameters and morphology in CO_2 hydrate formation

The CO2 hydrate formation experiment was carried out on a self-designed high pressure hydrate circulation pipeline device.The variation of flow parameters in the CO2 hydrate formation process was experimentally studied,and the generation mechanism was analyzed based on the morphological changes.The study found that during the experiment,temperature and pressure mutated at the same time,and CO2 hydrate was generated almost simultaneously in the entire circulation pipeline.The pressure difference in the circulation loop first increased and then decreased as the reaction progressed.CO2 hydrate formation induction time was gradually shortened as the system pressure increased and the flow rate increased.At the same time,high pressure and high flow rate also accelerated the rate of induction time shortening.The development of this experiment has guiding significance for the research on deepwater flow protection hydrate control technology and deepwater gas hydrate pipeline transportation technology.