The Kinetics of Thermal Decomposition of Ozone Dissolved
in Sub- and Supercritical Carbon Dioxide

V. V. Timofeev*, D. A. Lemenovskii*, Yu. N. Zhitnev*, V. V. Lunin*, M. V. Avdeev**,
V. K. Popov**, and V. N. Bagratashvili**

* Faculty of Chemistry, Moscow State University, Vorob’evy gory, Moscow, 119899 Russia

** Institute of Problems of Laser and Information Technologies, Russian Academy of Sciences,
Troitsk, Moscow oblast, Russia

Received December 20, 2002

Abstract—The kinetics of ozone decomposition in a gas mixture with CO₂ and in a supercritical carbon diox-
ide fluid was studied. The rate constants for ozone decomposition in the temperature range 295–324 K were
found. The activation energy of ozone destruction in these systems was determined. The rate of ozone thermal
decomposition in mixtures with CO₂ decreased as the pressure (density) of CO₂ increased. The decomposition
of ozone in both systems was heterogeneous in nature.

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