Kinetic Regime Changes in the Ozonation of 1,3-Cyclohexanedione in Aqueous Solutions

Abstract

The reaction between ozone and 1,3-cyclohexanedione in aqueous solutions at different pH was investigated from the point of view of the film theory. The rate of ozone absorption is accompanied by a second order irreversible reaction with 1,3-cyclohexanedione. The kinetic regime of absorption was found to change from fast (the reaction being of pseudo first order) to instantaneous, according to the ozone partial pressure applied. The former kinetic regime allows the determination of the reaction rate constant, while the latter leads to the volumetric mass transfer coefficient of the system.

Key Words:

• Ozone
• Ozonation
• Kinetics
• Film Theory
• 1,3-Cyclohexanedione
• Kinetic Regimes
• Chemical Absorption
• Ozone Oxidation
• Ozone Mass Transfer Coefficients