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Title:
Size-Dependent Belousov-Zhabotinsky Oscillation in Small Beads

Language:English
Type:Article
Authors:Kenichi Yoshikawa, Ryoichi Aihara and Konstantin Agladze
Editors:
Journal:Journal of Physical Chemistry A
Volume:102
Number:39
Month:9
Year:1998
Actual year:1998
Pages:7649–7652
doi:10.1021/jp982136d
bibtex id:190_1998_JPCA_Yoshikawa
Abstract:
We examined chemical oscillations in the Belousov-Zhabotinsky (BZ) reaction with spherical ion-exchange resin bends (radius: 0.1-0.4 mm) loaded with a cationic catalyst, ferroin, in which no traveling wave appears and the oscillation is synchronized over individual beads. The period of the oscillation increases with a decrease in the size of the beads. Based on a theoretical consideration of the effect of the diffusion of active species through the surface of the bead reactor into the bulk aqueous solution, the following relationship was deduced: f/[H2SO4](gamma) proportional to (1 - eta/R) where f is the frequency (Hz) of the oscillation, R is the radius (mm) of the beads, [H2SO4] is the concentration (mol/dm(3)) of sulfuric acid, and gamma and eta are constants. This relationship was consistent with experimental results with values of gamma = 1.4 and eta = 7.4 x 10(-4).
Acknowledgment:
1998
"Size-Dependent Belousov-Zhabotinsky Oscillation in Small Beads"
Kenichi Yoshikawa, Ryoichi Aihara and Konstantin Agladze, Journal of Physical Chemistry A, 102(39), 7649–7652 (1998)
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doi:10.1021/jp982136d