Support Effect on the Characteristics of Supported Manganese Catalysts in the O3-Catalytic Oxidation of Volatile Organic Compounds

IF 1.3 4区化学 Q4 CHEMISTRY, PHYSICAL

Kinetics and Catalysis Pub Date : 2023-12-12 DOI:10.1134/S0023158423060034

D. A. Bokarev, I. V. Paramoshin, A. V. Rassolov, S. A. Kanaev, G. O. Bragina, A. Yu. Stakheev

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Abstract

The characteristics of Mn catalysts supported on different carriers (SiO₂ and BEA zeolite) in the processes of ozone decomposition and ozone-catalytic oxidation (OZCO) of volatile organic compounds (VOCs) were studied using n-butane as an example. The parent SiO₂ was inactive in the test reactions, and the characteristics of Mn/SiO₂ were determined by the catalytic properties of the supported MnO_x oxide. In contrast to SiO₂, BEA zeolite demonstrated significant catalytic activity, although at a temperature 50°C higher than that for Mn/BEA. The data obtained allowed us to conclude that the catalytic characteristics of Mn/BEA at 30–100°C were also determined by the Mn component of the catalyst. At higher temperatures, the catalytic properties of BEA significantly affected the course of the OZCO process. The zeolite carrier improved hydrocarbon conversion at 100–200°C and decreased the amount of ozone required for the OZCO process over Mn/BEA.

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支撑物对 O3 催化氧化挥发性有机化合物中支撑锰催化剂特性的影响

以正丁烷为例，研究了不同载体（二氧化硅和 BEA 沸石）上支撑的锰催化剂在臭氧分解和臭氧催化氧化（OZCO）挥发性有机化合物（VOCs）过程中的特性。母体二氧化硅在测试反应中没有活性，而 Mn/SiO2 的特性则是通过支撑的氧化锰的催化特性来确定的。与二氧化硅相比，BEA 沸石具有显著的催化活性，尽管其温度比 Mn/BEA 沸石高 50°C。根据所获得的数据，我们可以得出结论：Mn/BEA 在 30-100°C 的催化特性也是由催化剂中的锰成分决定的。在较高温度下，BEA 的催化特性对 OZCO 工艺的进程产生了显著影响。与 Mn/BEA 相比，沸石载体提高了 100-200°C 时的碳氢化合物转化率，并减少了 OZCO 工艺所需的臭氧量。

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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.