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Liquid-liquid dispersion in co-current disc and doughnut pulsed column : effect of the operating conditions, physical properties and materials parameters

机译:并流圆盘和甜甜圈脉冲塔中的液-液分散体:操作条件,物理性质和材料参数的影响

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摘要

Pulsed columns are traditionally used to perform liquid liquid extractions at counter-current. They are currently seen as a potential tubular reactor to perform co-current continuous processes. In this paper the case of liquid liquid dispersion is considered. Various parameters are investigated such as the dispersed phase holdup, the flowrate and pulsation conditions but also some process parameters such as the packing material or the physical properties such as the type of surfactant. The energy dissipation rate is estimated according to correlations found in literature. Breakage and coalescence rate models are applied in order to understand the various observed phenomena. Finally, a correlation to predict the mean droplet size is proposed depending on various dimensionless numbers characterizing the flow, the internal and the physico-chemistry of the phase systems.
机译:传统上,脉冲色谱柱用于逆流进行液液萃取。目前,它们被视为执行并流连续过程的潜在管式反应器。本文考虑液体-液体分散的情况。研究了各种参数,例如分散相滞留率,流速和脉动条件,还研究了一些工艺参数(例如填料)或物理特性(例如表面活性剂的类型)。能量耗散率根据文献中的相关性估算。为了了解各种观察到的现象,应用了破裂和聚结速率模型。最后,根据表征相系统的流量,内部和物理化学的各种无量纲数字,提出了一种预测平均液滴尺寸的相关性。

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