JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Online ISSN : 1881-1299
Print ISSN : 0021-9592
Transport Phenomena, Fluid Mechanics and Mixing
The Effects of Surfactant on the Mass Transfer in Extraction Column
Yuh-Lang LeeJer-Ru MaaYu-Min Yang
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1998 Volume 31 Issue 3 Pages 340-346

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Abstract
A single-drop extraction apparatus was used to investigate the dependency of mass transfer coefficient on the amount of surfactant added. The mass transfer rate during drop formation and falling period, as well as the overall mass transfer coefficient were studied. The theory of dynamic surface effect was used to explain these phenomena. The results show that the mass transfer resistance increases with the added amount of SLS when the surfactant concentration is below 20 ppm. If the concentration is higher than this value, the resistance becomes constant. The mass transfer during drop formation plays an important part on the overall mass transfer efficiency and will be significantly affected by the presence of surfactant. According to this study, it is more appropriate to explain the mass transfer resistance induced by the surfactant from the viewpoint of hydrodynamics, rather than from the model of barrier layer.
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© 1998 The Society of Chemical Engineers, Japan
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