Relationship between the Activity of Oxide Catalysts in the Reaction of Ozone Decomposition and O3-Catalytic Oxidation of n-С4H10

• Published in: Kinetics and catalysis 2023-10, Vol.64 (5), p.683-685
• Main Authors: Bokarev, D. A., Paramoshin, I. V., Kanaev, S. A., Stakheev, A. Yu
• Format: Article
• Language: English
• Subjects: Aluminum oxide; Atomic oxygen; Catalysis; Catalysts; Catalytic oxidation; Chemistry; Chemistry and Materials Science; Chromium; Copper; Decomposition; Decomposition reactions; Hydrocarbons; Iron; Manganese; Oxidation; Oxygen recombination; Ozone; Physical Chemistry; Transition metal oxides; Transitional aluminas
• ISSN: 0023-1584; 1608-3210
• DOI: 10.1134/S0023158423050026

The activity of transition metal (V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) oxides supported on γ-Al 2 O 3 in the reaction of ozone decomposition was studied. The catalytic characteristics of the samples with high (NiO/Al 2 O 3 ), low (Cr 2 O 3 /Al 2 O 3 ), and intermediate (MnO x /Al 2 O 3 ) activity in ozone decomposition were studied in the process of ozone catalytic oxidation (OZCO) of n -butane. The results obtained allowed us to conclude that the optimal activity of a transition metal oxide in the decomposition of O 3 is of key importance in the OZCO process. At a low rate of ozone decomposition, hydrocarbon oxidation is limited by the rate of formation of atomic oxygen species; at an excessively high rate of decomposition, hydrocarbon conversion decreases due to an competitive process of atomic oxygen recombination. The best catalytic performance in the oxidation of n -C 4 H 10 was observed for a catalyst based on Mn oxide, which has an optimal activity in the decomposition of O 3 .