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2020 Vol.25, Issue 3 Preview Page
Sonochemical and Sonophysical Effects in a Downward-Irradiation Sonoreactor

하향 초음파 조사 시스템에서의 초음파 화학적 및 물리적 효과 평가

Seulgi Kim12
,
Younggyu Son12*
김 슬기12
,
손 영규12*
1Department of Environmental Engineering, Kumoh National Institute of Technology
2Department of Energy Engineering Convergence, Kumoh National Institute of Technology
1금오공과대학교 환경공학과
2금오공과대학교 에너지공학융합전공
*Corresponding Author
30 September 2020. pp. 23-31
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Abstract

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)
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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 25
  • No :3
  • Pages :23-31
  • Received Date : 2020-08-28
  • Revised Date : 2020-09-04
  • Accepted Date : 2020-09-14
  • DOI :https://doi.org/10.7857/JSGE.2020.25.3.023
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