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搅拌是促进CO2水合物快速制备的1种有效的机械强化方法。为提高水合物的生成速率并且降低能耗,在小型高压水合物反应装置上实验研究不同搅拌时机对CO2水合物生成特性的影响。结果发现,搅拌可以大大提高CO2的溶解速率,使CO2气体在3 min内即可达到溶解饱和。此外,水合物生成过程中搅拌时机的选择也非常关键。研究发现,仅在气体溶解和降温成核过程中实施35 min的搅拌不仅可以显著提高CO2水合物的生成速率,而且大大缩短了搅拌时间,与静态反应系统相比,能耗可降低86%。
Stirring is an effective method of mechanical strengthening that promotes the rapid preparation of CO2 hydrate. In order to increase the hydrate formation rate and reduce the energy consumption, the effect of different mixing timing on the formation characteristics of CO2 hydrate was experimentally investigated on a small high pressure hydrate reactor. The results showed that stirring can greatly increase the rate of CO2 dissolution, so that the CO2 gas within 3 min to reach saturation. In addition, the timing of mixing in hydrate formation is also crucial. It was found that only 35 min of stirring during gas-dissolving and cooling nucleation can not only significantly increase the rate of CO2 hydrate formation but also greatly shorten the mixing time, which can reduce the energy consumption by 86% compared with the static reaction system.