Quantitative calculation of reaction performance in sonochemical reactor by bubble dynamics
Xu Zheng (徐峥)a b, Yasuda Keiji (安田启司)b, Liu Xiao-Jun (刘晓峻)c
a School of Physics Science and Engineering, Tongji University, Shanghai 200092, China; b Department of Chemical Engineering, Nagoya University, Nagoya 464-8603, Japan; c School of Physics, Nanjing University, Nanjing 210093, China
Abstract In order to design a sonochemical reactor with high reaction efficiency, it is important to clarify the size and intensity of the sonochemical reaction field. In this study, the reaction field in a sonochemical reactor is estimated from the distribution of pressure above the threshold for cavitation. The quantitation of hydroxide radical in a sonochemical reactor is obtained from the calculation of bubble dynamics and reaction equations. The distribution of the reaction field of the numerical simulation is consistent with that of the sonochemical luminescence. The sound absorption coefficient of liquid in the sonochemical reactor is much larger than that attributed to classical contributions which are heat conduction and shear viscosity. Under the dual irradiation, the reaction field becomes extensive and intensive because the acoustic pressure amplitude is intensified by the interference of two ultrasonic waves.
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