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.

中文翻译：

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臭氧分解反应中氧化物催化剂活性与n-С4H10 O3催化氧化反应的关系

摘要

_{研究了γ-Al 2} O ₃负载过渡金属(V、Cr、Mn、Fe、Co、Ni、Cu、Zn)氧化物在臭氧分解反应中的活性。在此过程中研究了高活性（NiO/Al ₂ O ₃）、低活性（Cr ₂ O ₃ /Al ₂ O ₃）和中活性（MnO _x /Al ₂ O ₃ ）样品的臭氧分解催化特性。正丁烷的臭氧催化氧化（OZCO）。_{获得的结果使我们得出这样的结论：过渡金属氧化物在 O 3}分解中的最佳活性在 OZCO 流程中至关重要。在臭氧分解速率较低的情况下，碳氢化合物的氧化受到原子氧物质形成速率的限制；在分解速率过高时，由于原子氧重组的竞争过程，碳氢化合物转化率会降低。基于Mn氧化物的催化剂在n -C ₄ H ₁₀的氧化中观察到最佳的催化性能，其在O ₃的分解中具有最佳的活性。