Gas–liquid mass transfer in a slurry bubble column operated at gas hydrate forming conditions
Gas–liquid mass transfer in a slurry bubble column operated at gas hydrate forming conditions
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DOI：
10.1016/j.ces.2009.05.023
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发表时间：
2009-08
影响因子：
4.7
通讯作者：
S. Hashemi;A. Macchi;P. Servio
中科院分区：
文献类型：
--
作者：
S. Hashemi;A. Macchi;P. Servio
研究了CO2水合物在浆态鼓泡塔中的气液相间传质过程。模拟天然气水合物的形成需要质量传递和系统流体动力学的知识。当表观气速为0.20m/S时，压力为0.1~4 MPa，温度为室温~277K，用可润湿的离子交换树脂颗粒模拟CO2水合物的物性对体系流体力学的影响。浆料浓度最高可达10%体积分数。体积传质系数(KLAL)随表观气速和表观压力的增大而增大，与气含率的变化趋势一致。而气含率和气含率均随温度降低而降低，且前者更为敏感。在实验范围内，固体浓度对气含率的影响不显著。将水动力数据和运输数据与现有的最佳相关性进行了比较。
Gas–liquid interphase mass transfer was investigated in a slurry bubble column under CO2hydrate forming operating conditions. Modeling gas hydrate formation requires knowledge of mass transfer and the hydrodynamics of the system. The pressure was varied from 0.1 to 4MPa and the temperature from ambient to 277K while the superficial gas velocity reached 0.20m/s. Wettable ion-exchange resin particles were used to simulate the CO2hydrate physical properties affecting the system hydrodynamics. The slurry concentration was varied up to 10%vol. The volumetric mass transfer coefficient (klal) followed the trend in gas holdup which rises with increasing superficial gas velocity and pressure. However, klaland gas holdup both decreased with decreasing temperature, with the former being more sensitive. The effect of solid concentration on klaland gas holdup was insignificant in the experimental range studied. Both hydrodynamic and transport data were compared to best available correlations.