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Comparative study of sonochemical reactors with different geometry using thermal and chemical probes
- Source :
- Ultrasonics Sonochemistry, Ultrasonics Sonochemistry, 2007, 14, pp.330-336. ⟨10.1016/j.ultsonch.2006.06.006⟩, Ultrasonics Sonochemistry, Elsevier, 2007, 14, pp.330-336. ⟨10.1016/j.ultsonch.2006.06.006⟩
- Publication Year :
- 2007
- Publisher :
- HAL CCSD, 2007.
-
Abstract
- Laboratory scale 20 kHz sonochemical reactors with different geometries have been tested using thermal probes, the kinetics of H 2 O 2 formation, and the kinetics of diphenylmethane (DPhM) sonochemical darkening. Results revealed that the overall sonochemical reaction rates in H 2 O and DPhM are driven by the total absorbed acoustic energy and roughly independent the geometry of the studied reactors. However, the sonochemical efficiency, defined as η = VG / S , where G is a sonochemical yield of H 2 O 2 , V is a volume of sonicated liquid, and S is a surface of the sonotrode, was proved to increase with the decrease of S . This phenomenon was explained by growing of the maximum cavitating bubble size with ultrasonic intensity and its independence towards the specific absorbed acoustic power. For the cleaning bath reactor the kinetics of the sonochemical reactions in H 2 O and DPhM depends strongly on the reaction vessel materials: the reaction rates decreased with the increase of the materials elasticity. Kinetic study of H 2 SO 4 sonolysis using a sonoreactor without direct contact with titanium sonotrode showed that sulphate anion is an effective scavenger of OH radicals formed during water sonolysis.
- Subjects :
- Acoustics and Ultrasonics
Kinetics
Diphenylmethane
Geometry
02 engineering and technology
010402 general chemistry
7. Clean energy
01 natural sciences
Sonochemistry
Inorganic Chemistry
Reaction rate
chemistry.chemical_compound
Dosimetry
Chemical Engineering (miscellaneous)
Environmental Chemistry
Radiology, Nuclear Medicine and imaging
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Sulphuric acid
Sonotrode
Organic Chemistry
Sulfuric acid
Chemical reactor
021001 nanoscience & nanotechnology
Hydrogen peroxide
0104 chemical sciences
chemistry
13. Climate action
Cavitation
0210 nano-technology
[CHIM.OTHE]Chemical Sciences/Other
Sonoreactor
Subjects
Details
- Language :
- English
- ISSN :
- 13504177
- Database :
- OpenAIRE
- Journal :
- Ultrasonics Sonochemistry, Ultrasonics Sonochemistry, 2007, 14, pp.330-336. ⟨10.1016/j.ultsonch.2006.06.006⟩, Ultrasonics Sonochemistry, Elsevier, 2007, 14, pp.330-336. ⟨10.1016/j.ultsonch.2006.06.006⟩
- Accession number :
- edsair.doi.dedup.....bc392e7bd97c478575b686964482afb4