P2 エタノール水溶液の超音波霧化分離において生起する液柱のX線回折による液体構造研究

概要

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When the high power ultrasound waves irradiates the liquid surface, a capillary fountain jet is formed and small liquid droplets are generated from it. This phenomenon is called as ultrasonic atomization. Recently, Sato et al. have reported that ethanol is concentrated from the aqueous solution by ultrasonic atomization [J. Chem. Phys. 114, 2382(2001)]. To investigate the properties of the ultrasonically irradiated liquids will help to find out the mechanism for the ultrasonic separation. In-situ x-ray diffraction measurements of the capillary fountain jet were carried out by using a special designed ultrasonic atomization system with x-ray windows. The x-ray diffraction patterns of pure water and ethanol show exactly the same patterns as those without ultrasonic irradiation. The diffraction pattern of the 20 mol% ethanol-water mixture also shows the same behavior. These results indicate that ethanol would be concentrated when the small liquid droplets are generated from the fountain jet.
2005-10-14