Block Catalysts Based on Ce and Mn Oxides and Cordierite Ceramics for Ozone Decomposition

IF 1.3 Q4 ENGINEERING, CHEMICAL
M. V. Chernykh, G. V. Mamontov
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引用次数: 0

Abstract

The effect of the ratio of Ce and Mn oxides supported on cordierite ceramics on the structure and catalytic activity in the ozone decomposition reaction at room temperature was studied. The catalysts were prepared by impregnating cordierite ceramic blocks with citric acid at varying atomic ratios Ce : Mn. The physicochemical characteristics of the catalysts were studied using low-temperature nitrogen adsorption, X-ray phase analysis, scanning electron microscopy, and H2 temperature-programmed reduction, and the catalytic activity of the samples in ozone decomposition was tested at high flow rate (20–50 L/min) and an initial O3 concentration of 1–2 ppm. It has been shown that mixed oxide Ce–Mn catalysts are more active than catalysts based on individual Ce and Mn oxides. The activity passes through a maximum at the atomic ratio Ce : Mn = 1 : 2, which is due to the highly dispersed state of the supported oxides.

Abstract Image

基于铈锰氧化物和堇青石陶瓷的臭氧分解嵌段催化剂
研究了铈锰氧化物负载比对堇青石陶瓷结构和室温臭氧分解反应催化活性的影响。用不同原子比的柠檬酸浸渍堇青石陶瓷块制备催化剂。采用低温氮气吸附、x射线物相分析、扫描电镜、H2程序升温还原等方法研究了催化剂的理化特性,并在高流速(20 ~ 50 L/min)、初始O3浓度1 ~ 2 ppm条件下测试了催化剂对臭氧分解的催化活性。研究表明,混合氧化物铈锰催化剂比单独的铈锰氧化物催化剂具有更强的活性。在原子比为Ce: Mn = 1:2时,活性达到最大值,这是由于负载氧化物的高度分散状态。
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来源期刊
Catalysis in Industry
Catalysis in Industry ENGINEERING, CHEMICAL-
CiteScore
1.30
自引率
14.30%
发文量
21
期刊介绍: The journal covers the following topical areas: Analysis of specific industrial catalytic processes: Production and use of catalysts in branches of industry: chemical, petrochemical, oil-refining, pharmaceutical, organic synthesis, fuel-energetic industries, environment protection, biocatalysis; technology of industrial catalytic processes (generalization of practical experience, improvements, and modernization); technology of catalysts production, raw materials and equipment; control of catalysts quality; starting, reduction, passivation, discharge, storage of catalysts; catalytic reactors.Theoretical foundations of industrial catalysis and technologies: Research, studies, and concepts : search for and development of new catalysts and new types of supports, formation of active components, and mechanochemistry in catalysis; comprehensive studies of work-out catalysts and analysis of deactivation mechanisms; studies of the catalytic process at different scale levels (laboratory, pilot plant, industrial); kinetics of industrial and newly developed catalytic processes and development of kinetic models; nonlinear dynamics and nonlinear phenomena in catalysis: multiplicity of stationary states, stepwise changes in regimes, etc. Advances in catalysis: Catalysis and gas chemistry; catalysis and new energy technologies; biocatalysis; nanocatalysis; catalysis and new construction materials.History of the development of industrial catalysis.
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