Enhancement of sonochemical reactions by second-harmonic superimposition

Shinichiro Umemura, Ken ichi Kawabata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Effect of second-harmonic superimposition on cavitation and sonochemical reaction was investigated in a propagation mode by using a plane wave transducer piezoelectrically active at both fundamental and second-harmonic frequencies. The rate of iodine release induced by ultrasound at 1 MHz with a superimposed wave at 2 MHz showed significant dependence on the phase relation between the two waves. The largest rate was obtained at the relative phase which maximizes the magnitude of negative peak pressure while almost no iodine release was observed at the relative phase which maximizes the magnitude of positive peak pressure. At this optimum relative phase, the dependence of iodine release and subharmonic emission on the ultrasound power at 1 MHz and 2 MHz was studied. The results clearly show the synergistic effects of the fundamental and second harmonic on the chemical reaction and on higher-order subharmonic emission which typically accompanies acoustic cavitation.

Original languageEnglish
Title of host publicationProceedings of the IEEE Ultrasonics Symposium
PublisherPubl by IEEE
Pages917-920
Number of pages4
ISBN (Print)0780312783
Publication statusPublished - 1993 Dec 1
EventProceedings of the IEEE 1993 Ultrasonics Symposium - Baltimore, MD, USA
Duration: 1993 Oct 311993 Nov 3

Publication series

NameProceedings of the IEEE Ultrasonics Symposium
Volume2
ISSN (Print)1051-0117

Other

OtherProceedings of the IEEE 1993 Ultrasonics Symposium
CityBaltimore, MD, USA
Period93/10/3193/11/3

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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  • Cite this

    Umemura, S., & Kawabata, K. I. (1993). Enhancement of sonochemical reactions by second-harmonic superimposition. In Proceedings of the IEEE Ultrasonics Symposium (pp. 917-920). (Proceedings of the IEEE Ultrasonics Symposium; Vol. 2). Publ by IEEE.