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

A technology for eliminating formaldehyde and room temperature, applied in the field of air purification, can solve the problems of unfavorable reaction molecular adsorption product molecular desorption, limit the wide application of catalyst, reduce catalyst efficiency and other problems, achieve excellent low temperature activity and removal efficiency, low noble metal loading, The effect of improving catalytic activity and purification efficiency

Active Publication Date: 2016-02-03
展宗城
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 na

Method used

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

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preparation example Construction

[0057] A method for preparing a catalytic module that eliminates formaldehyde at room temperature, the preparation of the above-mentioned catalytic module includes the following steps: coating the coating 2 on the surface of the foamed ceramic structure by a vacuum coating method, and then using the dipping method or precipitation method on the coating 2 The step of carrying the catalyst layer 3 on the surface so as to obtain the catalytic module, the specific operation process includes the following steps:

[0058](1) Mix 10-40 parts by weight of coating precursor powder, 0.1-20 parts by weight of binder, 0.01-5 parts by weight of film-forming aid and deionized water, and the deionized water and coating precursor The mass ratio of the powder is 9:1~6:4; place the uniformly mixed slurry on a disperser, and disperse it at 300~550r / min for 20~60min; then use nitric acid or hydrochloric acid solution with a mass concentration of 5~20% to dissolve Adjust the pH of the slurry to pH...

Embodiment 1

[0072] Embodiment 1 Foam ceramic structure surface coating coating 2:

Embodiment 1-1

[0074] 50gTiO 2 (Type A), 1.5gHPMC-6000, 0.25g fatty alcohol polyoxyethylene ether (R=C16~18, n=20) and 250mLH 2 O Mix evenly, put it on a disperser and disperse at 350r / min for 30min, adjust the pH of the slurry to 3~4 with a 10% nitric acid solution, and continue to disperse for 15min; transfer the slurry to a sand mill for 1.5h Then transfer it to the storage tank of the vacuum coating machine, and then place the silicon carbide foam ceramic structure with a size of 100×100×20mm in the sample chamber for vacuum coating for 10 minutes, and use compressed air to blow out the excess slurry in the channel 4.

[0075] Put the slurry-coated foam ceramics in a curing box at 25°C and a relative humidity of 70% for 6 hours, dry at 80°C for 6 hours, and bake at 400°C in air flow for 4.0 hours to obtain carrier 1-1. 2 The coating amount is 57.8g / L.

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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...

Claims

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Application Information

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IPC IPC(8): B01D53/88B01D53/72B01J23/42B01J23/58
Inventor 展宗城李顺马保安杨艳林袁小芳
Owner 展宗城
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