25. 超音波による有機物分解に及ぼす物質移動の影響

概要

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In order to develop the ultrasonic reactor, the effect of mass transfer on the decomposition performance by ultrasonic irradiation is experimentally examined. The rectangular reactor (400 × 150 × 400(height)mm) was used and the sample to be decomposed was tetraphenylporhyrine tetrasulfonic acid. A stirrer was set in the reactor, and the location and rotation speed were changed. After a period of ultrasonic irradiation, the decomposition conversion was estimated. As a measure of liquid mixing behavior, the liquid mixing time in reactor was measured. As the rotation speed of stirrer becomes higher, the decomposition conversion increases in the case of stirrer located near the ultrasonic oscillator, but it decreases in the case of stirrer located far from the oscillator. The liquid mixing time decreases with increasing rotation speed of stirrer, independently of stirrer location. Based on the visualization of flow pattern in reactor and the results calculated by CFD, the reactor is modeled to consist of three parts. By using this model the data are analyzed, and the effect of stirrer location on the volumetric mass transfer coefficient is clarified.
日本ソノケミストリー学会の論文
2001-11-28