Department of Petroleum Engineering, Nazarbayev University, Nur-Sultan 010000, Kazakhstan.
Department of Petroleum and Natural Gas Engineering, Middle East Technical University, Ankara 06800, Turkey.
Molecules. 2022 Jul 8;27(14):4388. doi: 10.3390/molecules27144388.
Heat generation during gas hydrate formation is an important problem because it reduces the amount of water and gas that become gas hydrates. In this research work, we present a new design of an impeller to be used for hydrate formation and to overcome this concern by following the hydrodynamic literature. CH hydrate formation experiments were performed in a 5.7 L continuously stirred tank reactor using a butterfly turbine (BT) impeller with no baffle (NB), full baffle (FB), half baffle (HB), and surface baffle (SB) under mixed flow conditions. Four experiments were conducted separately using single and dual impellers. In addition to the estimated induction time, the rate of hydrate formation, hydrate productivity and hydrate formation rate, constant for a maximum of 3 h, were calculated. The induction time was less for both single and dual-impeller experiments that used full baffle for less than 3 min and more than 1 h for all other experiments. In an experiment with a single impeller, a surface baffle yielded higher hydrate growth with a value of 42 × 10 mol/s, while in an experiment with dual impellers, a half baffle generated higher hydrate growth with a value of 28.8 × 10 mol/s. Both single and dual impellers achieved the highest values for the hydrate formation rates that were constant in the full-baffle experiments.
水合物形成过程中的放热是一个重要问题，因为它会减少形成水合物的水和气体的量。在这项研究工作中，我们根据流体动力学文献提出了一种新的叶轮设计，用于水合物的形成，并通过这种设计来克服这一问题。在混合流动条件下，使用无挡板（NB）、全挡板（FB）、半挡板（HB）和表面挡板（SB）的蝶形涡轮（BT）叶轮，在 5.7L 连续搅拌釜式反应器中进行了 CH 水合物形成实验。分别进行了四个单独使用单叶轮和双叶轮的实验。除了估计的诱导时间外，还计算了水合物形成速率、水合物生产率和水合物形成速率常数，最大持续 3 小时。对于使用全挡板的单叶轮和双叶轮实验，诱导时间都小于 3 分钟，而对于所有其他实验，诱导时间都大于 1 小时。在单叶轮实验中，表面挡板产生的水合物生长值较高，为 42×10 mol/s，而在双叶轮实验中，半挡板产生的水合物生长值较高，为 28.8×10 mol/s。在全挡板实验中，单叶轮和双叶轮都达到了水合物形成速率的最高恒定值。
