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Adsorptive catalyst and preparation method and application thereof as well as air purification device, and air purification method and application thereof

A catalyst and air technology, applied in the field of adsorption catalysts, can solve the problems of low bonding strength of adsorption catalytic components and electric heating carriers, negative catalytic activity of catalysts, etc., and achieve the effects of improving industrial application prospects, good catalytic purification effect, and simplified process.

Active Publication Date: 2015-09-30
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, due to the difference in thermal expansion coefficient of the above-mentioned technology, frequent heating and cooling will lead to the peeling off of the adsorbed catalytic component and the electric heating carrier, that is, the binding strength of the adsorbed catalytic component and the electric heating carrier is low.
On the other hand, the small adsorption capacity of the adsorption layer with a low specific surface area limits the practical application of the catalyst, while the traditional hydrophilic structure has a negative effect on the catalytic activity of the catalyst.

Method used

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  • Adsorptive catalyst and preparation method and application thereof as well as air purification device, and air purification method and application thereof

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Embodiment approach

[0035] According to a preferred embodiment of the present invention, the surface of the hydrophobic silica is rich in methyl and / or fluoroalkyl groups, the particle size is 3-15nm, preferably 10-15nm, and the specific surface area is 600-1000m 2 / g, preferably 610-750m 2 / g.

[0036] According to the catalyst of the present invention, it is preferred that the thickness of the coating is 5-1000 μm, preferably 150-1000 μm.

[0037] According to the catalyst of the present invention, the catalytically active component capable of oxidizing gaseous pollutants can be a conventional choice in the art. For the present invention, it is preferred that the catalytically active component capable of oxidizing gaseous pollutants be metal oxides and / or noble metal element, preferably MnO x 、Co 3 o 4 , FeO x , CuO, NiO, TiO 2 、Al 2 o 3 , one or more of Pt, Pd, Au, Ru, Rh and Ag.

[0038] According to one embodiment of the present invention, it is preferred that the catalytically ac...

Embodiment 1

[0081] Preparation of adsorption catalytic catalyst:

[0082] (1) The hydrophobic SiO 2 (The particle size is 14.2nm by laser particle size analyzer, the hydrophobic angle test is 121.1°, and the specific surface area is 615.3m 2 / g), manganese nitrate: the mixture (1:1, weight ratio) of cobalt nitrate (1:1, weight ratio) and dispersant PEG and PVA is made coating;

[0083] (2) With finned aluminum as the structural carrier, the surface of the finned aluminum is cleaned by pickling-alkali washing and water washing, and the finned aluminum is pretreated by anodic oxidation to roughen the surface; The coating is coated on the fin-shaped aluminum by means of pressure spraying, and after drying, it is calcined at 400°C for 2h to obtain the catalyst (the thickness of the coating is 500 μm, and the coating contains 48% by weight of hydrophobic silicon dioxide, 48% by weight active ingredient and 4% by weight of the dispersant, where the hydrophobic SiO 2 The particle size is 14.2...

Embodiment 2

[0088] Preparation of adsorption catalytic catalyst:

[0089] (1) Mix hexamethylsilyl ether, aluminum nitrate and ammonium chloroplatinate (50:1 in molar ratio) and a mixture of dispersant PEG, β-cyclodextrin and hydroxymethyl cellulose (1:1: 1, weight ratio) made into coating;

[0090] (2) Using mullite honeycomb ceramics as the structural carrier, the surface of mullite honeycomb ceramics is cleaned by pickling-alkali washing and water washing, and the coating is coated on the mullite honeycomb ceramics by coating , calcined at 300° C. for 5 h after drying, and reduced with hydrogen at 150° C. for 1 h to obtain a catalyst (the thickness of the coating is 967 μm, the coating contains 80% by weight of hydrophobic silica, 10% by weight of active components and 10% by weight of dispersed agent, the hydrophobic SiO 2 The particle size is 10nm by laser particle size analyzer, the hydrophobic angle is 138.2°, and the specific surface area is 724.5m 2 / g).

[0091] Air purificatio...

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Abstract

The invention relates to the field of air purification, and particularly provides an adsorptive catalyst, and a preparation method and application thereof. The adsorptive catalyst comprises a structured carrier and a coating distributed on the inner surface and / or outer surface of the structured carrier; the total weight of the coating is standard, and the coating comprises 50-95% by weight of hydrophobic silica and 5-50% by weight of catalytically active components capable of oxidizing gaseous pollutants. The invention further provides an air purification device, and an air purification method and application thereof. The adsorptive catalyst provided by the invention can enhance the adsorption and diffusion processes of the gaseous pollutants, especially non-polar gaseous pollutants, in porous channels of the adsorptive catalyst to realize an excellent catalytic purification effect, and is particularly suitable for catalytic purification reactions under high-moisture and high-humidity working conditions. The preparation method is simple in process and low in cost and has the industrial production potential.

Description

technical field [0001] The present invention relates to an adsorption catalyst, a preparation method of the adsorption catalyst, and an application of the adsorption catalyst in air purification; an air purification device, an air purification method and its application in a household with air purification function Applications in electrical appliances. Background technique [0002] There are various gaseous pollutants in the enclosed space, but formaldehyde, ozone, and benzene series (benzene, toluene, xylene) are the main pollutants. Around the air purification treatment in the closed space, adsorption method and catalytic purification method are more commonly used at present. For example, the adsorption method achieves the purpose of removing gaseous pollutants through the adsorption of gaseous pollutants on the adsorbent. However, the adsorption method is a physical method, and the gaseous pollutants can easily reach adsorption saturation on the adsorbent, and the satur...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30B01D53/86B01D53/72B01D53/58B01D53/52B01D53/62B01D46/00B01J23/889B01J23/42B01J23/89B01J35/02B01J35/04
CPCY02A50/20Y02A50/2351
Inventor 刘刚
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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