Comparison of characterization methods in high frequency sonochemical reactors of differing configurations

Ultrasonics Sonochemistry
Samuel de La Rochebrochard d'AuzayEmmanuel Naffrechoux

Abstract

The aim of this study was to compare different characterization methods in order to evaluate the sonochemical efficiency of a cavitational reactor. The selected characterization methods were calorimetry and dosimetry based on potassium iodide oxidation or nitrite and nitrate ion formation. The effects of experimental parameters on physical and chemical effects of ultrasound were quantified with two transducers at a frequency of 366kHz. The studied factors comprised temperature (16-28 degrees C), acoustic power (6-38W), power density (4-61WL(-1)) and reactor configuration (D(reactor 1)=65mm, D(reactor 2)=102mm). Spectrophotometry was compared to ionic chromatography as a method to quantify nitrite and nitrate ions. Spectrometry was shown to be as representative as ionic chromatography. The reaction system based on the formation of both nitrite and nitrate ions was demonstrated to be as reliable as a potassium iodide dosimeter. The representativity of calorimetry was limited since part of acoustic energy was assumed to be used in the chemical reactions observed by dosimetry. Similar sonochemical efficiencies resulted from an increase of sonified surface (D(reactor 1)=65mm vs. D(reactor 2)=102mm) coupled to a 2-time decrease in po...Continue Reading

References

Aug 6, 2002·Ultrasonics Sonochemistry·Jan-Martin LöningUlrich Hoffmann
Aug 6, 2002·Ultrasonics·M W A KuijpersJ T F Keurentjes
Sep 11, 2002·Ultrasonics Sonochemistry·Darcey G Wayment, Dominick J Casadonte
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Jul 15, 2005·Ultrasonics Sonochemistry·Marcio InoueMikio Sakakibara

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Citations

Aug 30, 2011·Ultrasonics Sonochemistry·Samuel de La RochebrochardEmmanuel Naffrechoux
Nov 11, 2010·Angewandte Chemie·David Fernandez RivasHan J G E Gardeniers
Apr 22, 2011·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Gerald Harvey, Anthony Gachagan
Sep 3, 2013·Ultrasonics Sonochemistry·François ZaviskaEmmanuel Naffrechoux
Aug 31, 2016·Topics in Current Chemistry·Parag R Gogate, Pankaj N Patil
Sep 10, 2014·Chemical Society Reviews·G Chatel, D R MacFarlane
May 11, 2018·Bulletin of Environmental Contamination and Toxicology·Xiao TanZhipeng Duan
May 19, 2021·Ultrasonics Sonochemistry·Michael AdamskiSteven Holdcroft
Nov 25, 2021·Chemical Reviews·Daniela MeroniDaria C Boffito

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