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

IF 1.3 4区化学 Q4 CHEMISTRY, PHYSICAL

Kinetics and Catalysis Pub Date : 2023-10-05 DOI:10.1134/S0023158423050026

D. A. Bokarev, I. V. Paramoshin, S. A. Kanaev, A. Yu. Stakheev

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Abstract

The activity of transition metal (V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) oxides supported on γ-Al₂O₃ in the reaction of ozone decomposition was studied. The catalytic characteristics of the samples with high (NiO/Al₂O₃), low (Cr₂O₃/Al₂O₃), and intermediate (MnO_x/Al₂O₃) 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 O₃ 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-C₄H₁₀ was observed for a catalyst based on Mn oxide, which has an optimal activity in the decomposition of O₃.

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氧化物催化剂在臭氧分解和O3催化氧化n-С4H10反应中的活性关系

研究了负载在γ-Al2O3上的过渡金属（V、Cr、Mn、Fe、Co、Ni、Cu和Zn）氧化物在臭氧分解反应中的活性。研究了正丁烷臭氧催化氧化过程中高（NiO/Al2O3）、低（Cr2O3/Al2O3）和中等（MnOx/Al2O3）臭氧分解活性样品的催化特性。所获得的结果使我们能够得出结论，过渡金属氧化物在O3分解中的最佳活性在OZCO过程中至关重要。在低臭氧分解速率下，碳氢化合物的氧化受到原子氧物种形成速率的限制；在过高的分解速率下，由于原子-氧复合的竞争过程，烃转化率降低。基于氧化锰的催化剂在n-C4H10的氧化中观察到最佳的催化性能，其在O3的分解中具有最佳的活性。

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来源期刊

Kinetics and Catalysis 化学-物理化学

CiteScore

2.10

自引率

27.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Kinetics and Catalysis Russian is a periodical that publishes theoretical and experimental works on homogeneous and heterogeneous kinetics and catalysis. Other topics include the mechanism and kinetics of noncatalytic processes in gaseous, liquid, and solid phases, quantum chemical calculations in kinetics and catalysis, methods of studying catalytic processes and catalysts, the chemistry of catalysts and adsorbent surfaces, the structure and physicochemical properties of catalysts, preparation and poisoning of catalysts, macrokinetics, and computer simulations in catalysis. The journal also publishes review articles on contemporary problems in kinetics and catalysis. The journal welcomes manuscripts from all countries in the English or Russian language.