Characteristics of a Flow-Channel Type Sonochemical Reactor Equipped with Multitransducer

Abstract

Ultrasound was irradiated to an aqueous solution of KI for oxidizing iodide ions in a rectangular-channel type sonoreactor with 14 oscillators mounted in series. The ultrasonic frequency was 133.2 kHz. For different setting conditions with or without a reflector, the reaction was carried out in a batch and continuous operation mode, and the conversion of iodide ions was compared to investigate the characteristics of a reactor. Under the batch operation mode, a reaction rate constant without a reflector was higher than that with a reflector. For a continuous mode, similar rate constants were observed for both conditions with and without a reflector, and the constants were close to that for the batch mode with a reflector. The results indicate that horizontal sweeping flow along the air-liquid interface may have suppressed the cavitation. The effect of the liquid flow should be taken into consideration to design flow-type sonochemical reactors.