Longinos Sotirios Nik, Parlaktuna Mahmut
Department of Petroleum and Natural Gas Engineering, Middle East Technical University, 06800 Ankara, Turkey.
ACS Omega. 2021 Jan 5;6(2):1636-1646. doi: 10.1021/acsomega.0c05615. eCollection 2021 Jan 19.
In the present study, the effect of different kinds of impellers with different baffles or no baffle was investigated. Up-pumping pitched blade turbine (PBTU) and Rushton turbine (RT) were the two types of impellers tested. The reactor was equipped with different designs of baffles: full, half and surface baffles, or no baffles. Single (PBTU or RT) and dual (PBTU/PBTU or RT/RT) use of impellers with full (FB), half (HB), surface (SB), and no baffle (NB) combinations formed two sets of 16 experiments. The first group of experiments was close to the equilibrium line ( = 26.5 bars and = 8.5 °C), and the second group was deep in the equilibrium line ( = 24.5 bars and = 2 °C). There was estimation of rate of hydrate formation, induction time, hydrate productivity, overall power consumption, split fraction, and separation factor. In both single and dual impellers, the results showed that RT experiments are better compared to PBTU in the rate of hydrate formation. The induction time is almost the same because we are deep in the equilibrium line while, hydrate productivity values are higher in PBTU compared to RT experiments. As a general view, RT experiments consume more energy compared to PBTU experiments.
在本研究中，研究了不同类型的叶轮在有不同挡板或无挡板情况下的效果。上抽式斜叶涡轮（PBTU）和六直叶涡轮（RT）是测试的两种叶轮类型。反应器配备了不同设计的挡板：全挡板、半挡板和表面挡板，或无挡板。单（PBTU或RT）和双（PBTU/PBTU或RT/RT）使用叶轮与全（FB）、半（HB）、表面（SB）和无挡板（NB）的组合形成了两组16个实验。第一组实验接近平衡线（ = 26.5巴和 = 8.5°C），第二组深入平衡线（ = 24.5巴和 = 2°C）。对水合物生成速率、诱导时间、水合物产率、总功耗、分离系数和分离因子进行了估算。在单叶轮和双叶轮实验中，结果表明，在水合物生成速率方面，RT实验比PBTU实验更好。诱导时间几乎相同，因为我们处于平衡线深处，而与RT实验相比，PBTU实验中的水合物产率值更高。总体而言，与PBTU实验相比，RT实验消耗更多能量。
