Double-metal integral type plasma catalyst as well as preparation method and application of double-metal integral type plasma catalyst

Abstract

The invention provides a double-metal integral type plasma catalyst as well as a preparation method and application of the double-metal integral type plasma catalyst and belongs to the technical field of plasma catalysts. The catalyst is prepared by adopting an excessive immersion method; the catalyst is prepared through the following steps: pre-treating a carrier, and drying and roasting; taking water as a solvent and adding gamma-Al2O3 powder and active components; ultrasonically stirring; putting pre-treated cordierite honeycomb ceramic into slurry and carrying out ultrasonic treatment; drying and roasting to obtain the double-metal integral type plasma catalyst. According to the double-metal integral type plasma catalyst, the water is used as the solvent in a preparation process, so that no environment pollution is caused; a silica sol solution is used as a bonding agent and a dispersant, and the excessive immersion method is adopted, so that the active components can be relatively uniformly dispersed on the surface of the carrier, and furthermore, the degradation efficiency of volatile pollutants is easy to improve. The technology provided by the invention is simple to operate, the raw materials are cheap, preparation conditions are moderate and no pollution is caused in the process, so that the technology is a novel environment-friendly technology capable of easily popularizing industrialization and marketization.

Description

technical field [0001] The invention belongs to the technical field of plasma catalysis, and in particular relates to a bimetal monolithic plasma catalyst material and a preparation method thereof, which can be used for the removal of volatile organic pollutants. Background technique [0002] Volatile Organic Compounds (VOCs for short), as one of the main pollutants of air pollution, have complex components and various types. harm. The Outline of my country's Thirteenth Five-Year Plan clearly proposes to include VOCs in the total control index, which strengthens the national and local VOCs control. Traditional VOCs treatment methods, such as catalytic oxidation method, absorption method, adsorption method, photocatalytic oxidation method, membrane separation method, plasma method, etc., all have low treatment efficiency, high energy consumption, complex process, high operating cost and secondary pollution. In order to overcome the shortcomings of various degrees such as se...

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Problems solved by technology

Traditional VOCs treatment methods, such as catalytic oxidation method, absorption method, adsorption method, photocatalytic oxidation method, membrane separation method, plasma method, etc., all have low treatment efficiency, high energy consumption, complex process, high operating cost and secondary pollution. In order to overcome the shortcomings of different degrees such as secondary pollution, in recent years, low-temperature plasma co-catalyst removal of VOCs technology has attracted more and more attention from scholars.

[0003] There are many studies on low-temperature plasma catalysts, such as Chinese patents CN103785390A, CN104607172A, ZL200710009641 and ZL011805477.3, which introduce catalyst materials into the plasma field to improve the removal effect, but the carriers in the patents are all in powder form, which is not conducive to the promotion of industrialization ; Chinese patent CN105478136A discloses using SiC as a carrier, introducing precious metals Ag, Pt, Pd, etc. as main active components, and transition metals Mn, Co, Ni, etc. Inactivation is not conducive to the application in engineering practice. In order to overcome the deficiencies of the prior art, the present invention uses cordierite ceramics as a carrier and introduces dual active components of transition metals and rare earth metals to further promote the industrial application of isothermal plasma catalysts

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