Phenol Degradation around Different Oxidative Systems with the Participation of Hydrogen Peroxide

• Published in: Russian Journal of Physical Chemistry A Vol. 98; no. 8; pp. 1698 - 1703
• Main Authors: Zimin, Yu. S., Akhmetnabieva, K. A., Shaikhitdinov, R. Z., Mustafin, A. G.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-08-2024; Springer Nature B.V
• Subjects: Aqueous solutions; Chemical Kinetics and Catalysis; Chemistry; Chemistry and Materials Science; Consumption; Degradation; Hydrogen peroxide; Oxidizing agents; Phenols; Physical Chemistry; Reaction kinetics; Room temperature; Temperature dependence; shock wave; phenol; degradation; hydrogen peroxide; ozone–oxygen mixture
• ISSN: 0036-0244; 1531-863X
• DOI: 10.1134/S0036024424700742

The authors study the kinetics of the oxidative degradation of phenol (PhOH) in three reaction systems (PhOH + H
2
O
2
+ H
2
O, PhOH + H
2
O
2
+ O
3
+ O
2
+ H
2
O, and PhOH + H
2
O
2
+ shock wave + H
2
O). It is shown that the reaction between phenol and hydrogen peroxide in aqueous solutions occurs according to a second-order kinetic law (first-order with respect to PhOH and first-order with respect to H
2
O
2
). The temperature dependence of the second-order rate constant in the range of 313–353 K is studied, and the parameters of the activation of the reaction are determined. It is shown that the combined use of H
2
O
2
and an O
3
–O
2
mixture allows the initial rates of PhOH consumption to be raised by several tens to several hundred times (by factors of 70 and 195 at 313 and 333 K, respectively), compared to the effect of a single oxidizing agent. The simultaneous use of H
2
O
2
and a shock wave also raises the initial rate of PhOH consumption by more than four orders of magnitude, while ensuring a high degree of degradation of PhOH (96%) even at an extremely short period of exposure (30 s) and room temperature.