Seulgi Kim1,2·Younggyu Son1,2,*
1
Department of Environmental Engineering, Kumoh National Institute of Technology
2
Department of Energy Engineering Convergence, Kumoh National Institute of Technology
김슬기1,2
·손영규1,2,
*
1
금오공과대학교 환경공학과
2
금오공과대학교 에너지공학융합전공
The performance of a
downward-irradiation sonoreactor was investigated using calorimetry, KI
dosimetry, luminol (Sonochemiluminescence, SCL) method, and aluminium foil
erosion method as one of the basic steps for the optimal design of
downward-irradiation sonoreactors. The applied frequency was 28 kHz and
the input electrical power was 280 - 300 W. The liquid height, from the
reactor bottom to the transducer module surface, ranged from 1λ (53.6 mm) to 2λ (107.1 mm). For various liquid heights, the magnitude of
calorimetric power and the mass of cavitation-generated I3- ion varied significantly. It
was found that the additional application of mechanical mixing resulted in
higher sonochemical activity, especially in the cavitational active zone, which
was induced by violent liquid flow in the reactor. In aluminium foil erosion
tests, it was found that less ultrasound energy reached the bottom of the
reactor due to the violent liquid flow and no significant sonophysical effect
was observed for higher mixing rate conditions (100 and 200 rpm).
Keywords: Cavitation, Sonoreactors, Calorimetry, KI dosimetry, Sonochemiluminescence (SCL)
2020; 25(3): 23-31
Published on Sep 30, 2020
1 Department of Environmental Engineering, Kumoh National Institute of Technology
2