Catalytic module capable of removing formaldehyde at room temperature and preparation method thereof

Abstract

The invention discloses a catalytic module capable of removing formaldehyde at room temperature and a preparation method thereof. The catalytic module comprises a skeleton carrier, coatings and catalyst layers, the skeleton carrier is a foam ceramic structure with three-dimensional pore channels, and the foam ceramic structure is internally provided with multiple pore channels which are interwoven into a net-shaped structure and arranged in any one of the X direction, the Y direction and the Z direction; the coatings are evenly coated on the surfaces of the pore channels in the foam ceramic structure and the other surface of the foam ceramic structure, and the catalyst layers are highly dispersed on the coatings. By means of the catalytic module capable of removing the formaldehyde at the room temperature and the preparation method thereof, at the room temperature and environment humidity, low-concentration formaldehyde can be oxidized into H2O and CO2, excellent low-temperature activity and removing efficiency are achieved, and the formaldehyde removing efficiency can be kept above 98 percent at the airspeed SV equal to 50,000 h<-1>. The preparation process is simple, the precious metal load is low, and accessory equipment such as light sources and heating are not needed. The catalytic module is suitable for air purification of closed and semi-closed spaces such as living rooms, office buildings, schools, dormitories, shopping malls, furniture markets and automobiles.

Description

technical field [0001] The invention relates to an environmental catalytic material for purifying air and a preparation method thereof, belonging to the technical field of air purification, in particular to a catalytic module for eliminating formaldehyde at room temperature and a preparation method thereof. Background technique [0002] As we all know, formaldehyde is a colorless, pungent-smelling toxic gas at ambient temperature, and is the most toxic pollutant in indoor air pollution. Formaldehyde has been identified by the World Health Organization as a carcinogenic, mutagenic and teratogenic substance. Is a recognized source of allergies. Formaldehyde poses a serious threat to human survival and health. When the concentration of formaldehyde in the air exceeds 0.10mg / m 3 May significantly irritate the upper respiratory tract. Formaldehyde is even more harmful to children and pregnant women. Statistics from the China Environmental Protection Association show that 90% of...

AI Technical Summary

Problems solved by technology

The above-mentioned patents use straight-hole cordierite honeycomb as the carrier skeleton, which limits the wide application of the catalyst

[0005] Catalysts used to oxidize formaldehyde at room temperature have disadvantages such as poor low-temperature activity, short life, and narrow application range. The existing monolithic catalytic modules use straight-hole cordierite honeycomb ceramics as the carrier skeleton, which is not conducive to the adsorption of reaction molecules and the adsorption of product molecules. desorption, reducing catalyst efficiency

Images