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Gas/liquid mass transfer phenomena in micellar multiphase systems
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2021-07-13 , DOI: 10.1016/j.cep.2021.108547
M. Petzold 1 , N. Paul 1 , L. Hohl 1 , L. Böhm 1 , M. Kraume 1
Affiliation  

Micellar multiphase systems are versatile examples for smart solvent systems, which can be applied to intensify important process aspects like reaction rate and product separation. Choosing different temperatures and compositions, the phase behaviour of micellar multiphase systems can be changed, and the reaction conditions altered. Due to the changing phase behaviour, mass transfer is affected, i.e., by altered interfacial areas which can influence the rate of a reaction. Up to two liquid dispersed phases can appear. For fast reactions with a gaseous component, the dispersion conditions and mass transfer are, therefore, complex. In this work, the gas/liquid mass transfer in two and three-phase micellar multiphase systems was observed to gain a better understanding of the transport mechanisms in such systems. The phase behaviour was found to influence the mass transfer strongly. When a microemulsion formed the continuous phase, the mass transfer was enhanced by a factor up to 2.4. Whenever a second liquid phase appeared, the volumetric mass transfer coefficient was decreased. While the mass transfer of the gas to a pure single liquid phase could be predicted by known theory, current mass transfer equations fail to capture the effect in micellar multiphase systems.



中文翻译:

胶束多相系统中的气/液传质现象

胶束多相系统是智能溶剂系统的通用示例,可​​用于加强重要的工艺方面,如反应速率和产物分离。选择不同的温度和组成,可以改变胶束多相体系的相行为,从而改变反应条件。由于相行为的变化,传质受到影响,即会影响反应速率的改变的界面区域。最多可以出现两个液体分散相。因此,对于与气态组分的快速反应,分散条件和传质是复杂的。在这项工作中,观察了两相和三相胶束多相系统中的气/液传质,以更好地了解此类系统中的传输机制。发现相行为强烈影响传质。当微乳液形成连续相时,传质提高了 2.4 倍。每当出现第二个液相时,体积传质系数就会降低。虽然可以通过已知理论预测气体向纯单一液相的传质,但当前的传质方程未能捕捉到胶束多相系统中的影响。

更新日期:2021-07-13
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