Cauliflower-shaped LaMnO3-CuMnCeOx mixed composite oxide catalyst, preparation method and application of cauliflower-shaped LaMnO3-CuMnCeOx mixed composite oxide catalyst

Abstract

The invention discloses a cauliflower-shaped LaMnO3-CuMnCeOx mixed composite oxide catalyst as well as a preparation method and application thereof, and belongs to the field of treatment of volatile organic compounds (VOCs). The invention relates to a cauliflower-shaped LaMnO3-CuMnCeOx mixed composite oxide catalyst, which is prepared by taking a cauliflower-shaped LaMnO3-CuMnCeOx mixed composite oxide as an active component and silicon dioxide, aluminum oxide and kaolin as carriers through the steps of mixing, stirring, mud grinding, extruding, drying and roasting, and the catalyst can efficiently and stably catalyze and oxidize VOCs (Volatile Organic Compounds) at normal temperature (0-35 DEG C) and in a thermal environment (200-400 DEG C) respectively.

Description

technical field [0001] The invention belongs to the field of volatile organic matter treatment, in particular to a cauliflower-shaped LaMnO 3 -CuMnCeO x Mixed composite oxide catalyst, preparation method and application thereof. Background technique [0002] With the continuous development of science and technology, volatile organic compounds (VOCs), as common air pollutants, are accompanied by irritating odor and are flammable and explosive. 2.5 ) and ozone (O 3 ) is an important precursor of ); it has attracted much attention due to its wide range of sources, strong acute toxicity, high bioaccumulation, and refractory degradation, which cause great harm to the atmospheric environment, animal and plant growth, and human health. [0003] At present, the technologies for dealing with VOCs mainly include recycling technology and destruction technology. The recovery technology mainly enriches and separates VOCs by changing the physical conditions such as temperature and pre...

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Problems solved by technology

Precious metal catalysts mainly use noble metals such as Pt, Pd, and Rh as active components, and are often widely used in the catalytic industry. loss, easy sintering and other problems, and easy to be poisoned by chlorine; transition metal catalysts mainly include Ni, Co, Cr, Mn, Fe, Cu and Ce, etc., due to their good catalytic performance, chlorine poisoning resistance and low cost It has attracted widespread attention; transition metal oxides are often prepared as composite oxide catalysts for the catalytic oxidation of VOCs, which have high catalytic performance and stability, and some components even exceed noble metal catalysts; molecular sieve catalysts have a large specific surface area , Appropriate B acid sites and L acid sites contribute to the performance of catalytic oxidation performance and the improvement of chlorine poisoning resistance, but the B acid sites are easy to cause carbon deposition, and the L acid sites are easy to cause the generation of chlorine-containing by-products; therefore , the research and development of efficient and stable composite transition metal oxide catalysts, combined with honeycomb cordierite or molecular sieve as a carrier to replace noble metal catalysts will become a hot spot and trend in the research of industrial catalytic oxidation catalysts at home and abroad

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