P16 円筒型超音波反応器のソノケミカル反応効率

概要

論文の詳細を見る
It is well known that bubbles produced by ultrasound in the frequency range from 20 kHz to a few MHz leads to various physical and chemical effects. However, there is little application of the ultrasound to the chemical process in an industrial scale. In order to design a large sonochemical reactor, it is important to investigate the sonochemical reactivity and the acoustic field in the reactor. The sealed type of a cylindrical reactor was made of acrylic pipe of a thickness of 5 mm and an inner diameter of 70 mm. The sonochemical efficiency for the cylindrical reactor was investigated with the upward, downward, and horizontal irradiation. A frequency of ultrasound was 490 kHz and a distance between a transducer and a reflector was 500 mm. The sonochemical reactivity was evaluated by KI dosimetry and the luminol image. The horizontal irradiation gave the concentration of I_3^- higher than upward irradiation by approximately 20%. The concentration of I_3^- for the downward irradiation was lower than that for upward irradiation by approximately 35%. In the cylindrical rector, the higher sonochemical reactivity was obtained near a reflector. This result was supported by the result of a luminol image.
日本ソノケミストリー学会の論文
2005-10-14