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首页> 外文期刊>American journal of engineering and applied sciences >Flow Dynamic Behavior of Fish Oil/Silver Nitrate Solution in Mini-Channel, Effect of Alkane Addition on Flow Pattern and Interfacial Tension
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Flow Dynamic Behavior of Fish Oil/Silver Nitrate Solution in Mini-Channel, Effect of Alkane Addition on Flow Pattern and Interfacial Tension

机译：鱼油/硝酸银溶液在微通道中的流动动力学行为，烷烃添加量对流型和界面张力的影响

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摘要

The mini-fluidic contacting system is developed as process intensification platform as an attractive alternative for existing liquid-liquid extraction system for separation of Omega 3 PUFA from using Aqueous 50% Wt. Silver nitrate solution. To improve the performance of extraction in mini-fiuidics, it is necessary to study the flow-dynamic behavior of fish oil silver nitrate system in the channel. Moreover, different flow patterns influence mass transfer and mixing which indirectly influence the separation efficiency of omega 3 PUFA from fish oil. Therefore, Different flow patterns were studied at Y-junction that connected to mini-channel and classified over a range of organic phase and aqueous flow rate. The flow is stratified at the "Y" Junction after phase inversion and also due to the reduction of interfacial tension between fish oil and silver nitrate solution. The addition of alkane's solvents into the fish oil ethyl ester is attempted to change the flow pattern of fish oil silver nitrate system by elevation of interfacial tension. The formation mechanism of slug and stratified flow was studied by a competition between the gravity, inertia, viscous forces and the interfacial tension forces. The flow patterns maps is presented in terms of Ca, Re and We and identified the three regions namely gravity force dominant region, transition region and interfacial force dominant region. The flow patterns observed in real Fish Oil/AgNO_3 system was significantly different than previously reported for a synthetic DHA/AgNO_3 system. The addition of organic solvent into the fish oil ethyl ester increase the interfacial tension between fish oil and silver nitrate system, however, the increase was not sufficient to produce slug flow. This would suggest that practical processing of fish oils with AgNO_3 would require the handling of stratified flow within the processing units.
机译：微型流体接触系统是作为过程强化平台而开发的，是现有液-液萃取系统的引人注目的替代品，用于从使用50％的Wt水溶液中分离Omega 3 PUFA。硝酸银溶液。为了提高微流体中的萃取性能，有必要研究鱼油硝酸银系统在通道中的流动动力学行为。此外，不同的流态会影响传质和混合，从而间接影响omega 3 PUFA从鱼油中的分离效率。因此，研究了在Y形接头处连接到微通道并在有机相和水相流速范围内进行分类的不同流型。相转化后，流在“ Y”形结处分层，也归因于鱼油和硝酸银溶液之间的界面张力降低。试图通过提高界面张力来将烷烃​​溶剂添加到鱼油乙酯中以改变鱼油硝酸银系统的流动方式。通过重力，惯性，粘性力和界面张力之间的竞争研究了团状流和分层流的形成机理。用Ca，Re和We表示了流型图，并确定了三个区域，即重力主导区域，过渡区域和界面主导区域。在真实的鱼油/ AgNO_3系统中观察到的流动模式与先前针对合成DHA / AgNO_3系统报告的流动模式显着不同。向鱼油乙酯中添加有机溶剂会增加鱼油与硝酸银系统之间的界面张力，但这种增加不足以产生团状流。这表明用AgNO_3进行鱼油的实际加工将需要在加工单元内处理分层流。

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