Kinetic Role of CO2 Escape in the Oscillatory H2O2-HSO3-HCO3- Flow System

G. Rábai, Noriaki Okazaki, Ichiro Hanazaki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Experiments have been performed in a CSTR closed to the air to clarify the kinetic role of CO2 in the complex behavior observed during the autocatalytic oxidation of an aqueous solution of sulfur(IV) by hydrogen peroxide in the presence of hydrogen carbonate ions in a continuous-flow stirred tank reactor. Neither complex periodic nor chaotic oscillations, but simple periodic relaxation pH oscillations have been found if neither spontaneous escape nor controlled removal of CO2 from the reactor to the air were allowed. State diagrams delineating the behavior of the system at 4.0 °C under various input concentrations and flow rates have been obtained. A simple empirical rate law model could be used to simulate the behavior of the reaction system in a wide range of conditions. The critical role of CO2 escape is discussed.

Original languageEnglish
Pages (from-to)7224-7229
Number of pages6
JournalJournal of Physical Chemistry A
Volume103
Issue number36
Publication statusPublished - Sep 9 1999

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escape
Kinetics
kinetics
Bicarbonates
Air
reactors
Sulfur
Hydrogen Peroxide
oscillations
air
Flow rate
Ions
hydrogen peroxide
Oxidation
carbonates
sulfur
flow velocity
diagrams
aqueous solutions
oxidation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Kinetic Role of CO2 Escape in the Oscillatory H2O2-HSO3-HCO3- Flow System. / Rábai, G.; Okazaki, Noriaki; Hanazaki, Ichiro.

In: Journal of Physical Chemistry A, Vol. 103, No. 36, 09.09.1999, p. 7224-7229.

Research output: Contribution to journalArticle

Rábai, G. ; Okazaki, Noriaki ; Hanazaki, Ichiro. / Kinetic Role of CO2 Escape in the Oscillatory H2O2-HSO3-HCO3- Flow System. In: Journal of Physical Chemistry A. 1999 ; Vol. 103, No. 36. pp. 7224-7229.
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