Abstract
It is important to control the gas absorption in the gas-liquid reaction process. Using microbubble, the gas-liquid interfacial area is large and the residence time is long. On the other hand, when the ultrasound was irradiated into the microbubble solution, microbubbles approached and were agglomerated. After ultrasonic irradiation was stopped, microbubbles dispersed again. In this study, the effects of ultrasonic frequency on thebehavior of microbubbles were investigated. When ultrasound was irradiated, microbubbles approached by second Bjerknes force. However, microbubbles did not unite by the electrical repulsive force. It was also found that ultrasonic frequency influenced size and density of the agglomerate microbubble. It is considered that potential of surface of microbubble and second Bjerknes force affect the agglomeration behavior.
