Predicting Droplet Size Distributions of Emulsions Produced in a Sonolator

Predicting Droplet Size Distributions of Emulsions Produced in a Sonolator
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预测超声波发生器中产生的乳液的液滴尺寸分布

DOI:
10.1021/acs.iecr.9b05596
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发表时间:
2020
影响因子:
4.2
通讯作者:
John T
John T
中科院分区:
工程技术3区
文献类型:
--
作者:
John T

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与批量生产相比,连续生产乳液具有许多优点,例如提高生产速度和灵活性。Sonolator是一种类似于高压均质器的设备,能够进行连续生产。本文研究了乳化过程中产生的液滴尺寸,以适应不同的孔压降、分散相粘度和孔尺寸。分散相的相分数,高达10%v/v,和存在的叶片后的孔被发现不影响液滴尺寸分布(DSD)。模式液滴尺寸随着压降的增加而减小,并且由于卫星液滴的形成,DSD大多是双峰的,这意味着d3,2是一个较差的基准参数。我们提出了一个模型,能够预测完整的DSD的乳液。这揭示了使用Sonolators扩大生产规模的关键参数,有助于提高产品质量和工艺效率。
Producing emulsions continuously compared to in batch production has many benefits, such as increased speed and agility of production. A Sonolator, a device similar to a high-pressure homogenizer, is capable of this continuous production. In this paper, the size of droplets produced during emulsification has been investigated for various orifice pressure drops, dispersed phase viscosities, and orifice sizes. The phase fraction of the dispersed phase, up to 10% v/v, and the presence of a blade after the orifice were found not to affect the droplet size distribution (DSD). The mode droplet size decreased with increasing pressure drop and the DSDs were mostly bimodal, due to the formation of satellite droplets, meaning thatd3,2is a poor benchmarking parameter. We propose a model capable of predicting the full DSD of the emulsion. This reveals key parameters for scale-up of production using Sonolators and can help to improve product quality and process efficiency.
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DOI: 10.1002/cjce.5450570203
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