Monolithic catalyst for catalyzing ozone to degrade VOCs as well as preparation and application of monolithic catalyst

Abstract

The invention relates to a monolithic catalyst for catalyzing ozone to degrade VOCs, and belongs to the technical field of catalyzing ozone to oxidize VOCs. The monolithic catalyst comprises inorganic ceramic and a molecular sieve, the molecular sieve is loaded on the inorganic ceramic, and the specific surface area of the inorganic ceramic is 30-250 m<2> / g; the surface of the inorganic ceramic comprises micropores, and the aperture of the micropores is 5-10 microns; the specific surface area of the molecular sieve is 300-600 m<2> / g, and the silica-alumina ratio of the molecular sieve is not less than 5; the molecular sieve is loaded with a non-noble metal oxide, and the mass of the non-noble metal oxide accounts for 0.5-10% of the mass of the molecular sieve; the surface of the inorganic ceramic is coated with silica sol, and an organic pore-forming agent is used in the preparation process of the catalyst; through the treatment that the surface of the inorganic ceramic is coated with the silica sol and the organic pore-forming agent, the mass transfer efficiency and the mechanical stability of the coating are improved while the catalytic action of the active components is fully exerted.

Description

technical field [0001] The invention belongs to the technical field of catalytic ozone oxidation of VOCs, and more specifically relates to a monolithic catalyst for catalytic ozone degradation of VOCs and its preparation and application. Background technique [0002] Catalyst, as the core of the catalytic process, is one of the key concerns in the field of catalysis research. Although noble metal catalysts represented by Pt, Pb, Au, and Ag have the advantages of low light-off temperature, high catalytic activity, and less likely to produce secondary pollutants, their cost is too high, their thermal stability is poor, and they are easy to be lost during use. Catalyst poisoning, which greatly limits the industrial application of noble metal catalysts. At present, oxides of non-noble metals are often used instead of noble metals to reduce catalyst preparation costs and improve application stability. Non-noble metal oxide catalysts mainly include transition metal oxides, perov...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem that the stability and mass transfer efficiency of the active components of the existing catalytic ozone oxidation VOCs catalysts are difficult to balance, a monolithic catalyst for catalytic ozone degradation VOCs is provided. The active component catalyzes the mass transfer efficiency and the mechanical stability of the coating at the same time;

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