On line analysis of structure of dispersions in an oscillatory baffled reactor using electrical impedance tomography
On line analysis of structure of dispersions in an oscillatory baffled reactor using electrical impedance tomography
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DOI：
10.1016/j.cej.2007.10.018
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发表时间：
2008-07
影响因子：
15.1
通讯作者：
G. Vilar;Richard A. Williams;Miao Wang;R. Tweedie
中科院分区：
文献类型：
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作者：
G. Vilar;Richard A. Williams;Miao Wang;R. Tweedie
提出了一种在线测量振荡折流板反应器(OBR)的新方法。我们展示了如何使用电阻抗断层成像(EIT)传感器来绘制分散相在乳状液中的空间浓度图，并获得速度分布信息。提供了基于实验工作的数据，以便能够使用EIT在线测量的结果来生产油包水/水包油乳状液。使用OBR的无量纲参数和通过层析成像信号的互相关获得的数据来量化过程性能。由EIT数据得到的速度结果与前人工作中描述的OBR的众所周知的流型吻合得很好。麦克斯韦关系式的应用使乳化过程中局部油量分布的定量化成为可能。研究证明了这种方法如何使用电阻抗断层扫描来监测OBR中的化学过程的原理。
A novel methodology of on line measurement in an oscillatory baffled reactor (OBR) is presented. We show how the use of an electrical impedance tomography (EIT) sensor can map the spatial concentration of the dispersed phase in the emulsion and also obtain velocity profile information. Data are presented based on experimental work to enable production of water-in-oil/oil-in-water emulsions using the results of the on line measurement with the EIT. Process performance is quantified using dimensionless parameters of the OBR and the data obtained from cross-correlation of tomographic signals. The velocity results derived from the EIT data show good agreement with the well known flow pattern of the OBR described in previous works. The application of Maxwell relations enables the quantification of the local oil volume distribution in the emulsion process. Research demonstrates the principle how such methods can be used to monitor a chemical process in the OBR using electrical impedance tomography.