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Low-temperature plasma air purification catalytic reactor and its preparation process

A catalytic reactor, low-temperature plasma technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of activated carbon consumption, uneconomical, secondary pollution, etc., to achieve no secondary pollution, compact structure , easy maintenance

Inactive Publication Date: 2005-11-23
BEIJING CLEAR SKY CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Filtration technology can remove some medium and coarse particles, but aerosols are difficult to remove; using absorption technology to remove organic matter requires periodic replacement, and it will pollute the environment when the absorption liquid is poured out; activated carbon adsorption is the most used, but in adsorption After saturation, activated carbon needs to be replaced, which is inconvenient to use; when using activated carbon catalyst, because C and O 3 A chemical reaction will take place, and the reaction equation is: , so that the activated carbon is consumed, and it will produce secondary pollution CO; when using low-temperature plasma and high-voltage electrostatic dust removal, it will produce O 3 , a special catalytic reactor is required to remove O 3 , so that the structure becomes huge, this kind of catalytic reactor needs to be heated to meet the working requirements, and the purification effect of this kind of catalytic reactor for organic matter with low concentration and large air volume is not good, energy consumption is large, and it is uneconomical; When combined with photocatalyst technology, the actual effect is not good, and the presence of certain water molecules is required, the reaction is not complete, and there is secondary pollution

Method used

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  • Low-temperature plasma air purification catalytic reactor and its preparation process
  • Low-temperature plasma air purification catalytic reactor and its preparation process
  • Low-temperature plasma air purification catalytic reactor and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Take a stainless steel wire mesh with 25% Cr content of 0.3mm wire diameter and 1mm mesh side length, roll the steel mesh into a tube and weld the joints; it is corroded in oxalic acid, washed with water, and anodized to form a wire on the wire. Layer oxide film; take 100 parts by weight of γ-Al 2 O 3 Moisten with water, stir well, add 1 part by weight of concentrated HNO 3 Beating, adding 1 part by weight of binder Al(NO 3 ) 3 ·9H 2 O, then add 10 parts by weight of CeO 2 Powder, 3 parts by weight of La 2 O 3 Powder, 2 parts by weight of ZrO 2 Stir the powder into a slurry, then immerse the oxidized stainless steel mesh into the slurry, take it out after 3 minutes, blow off the excess paint with compressed air, and dry it at a temperature of 100°C for two hours before drying , The tube furnace can be used for automatic and continuous feeding and discharging. The sintering time for entering and leaving the furnace is one hour. The middle section of the furnace is a constant...

Embodiment 2

[0056] Refer to figure 1 with figure 2 When using the method described in Example 1 to prepare the product, the inner wall of the cathode tube can be treated to make a layer of Pt as a catalyst attached to the inner wall of the cathode tube. The process includes the following steps:

[0057] (1) To roughen the aluminum plate, you can sand the surface with sandpaper, then degreasing, washing with water, corroding in 2% oxalic acid, then anodizing, cleaning and drying;

[0058] (2) Spray a Pt element salt solution with a concentration of 10 g / L on the aluminum plate obtained in step (1), and reduce it with hydrogen after drying. The reduction reaction temperature is 480° C., and the reduction time is 2 hours.

[0059] It is also possible to paint Pt black directly on the aluminum plate to make the thickness of Pt black 5μm.

[0060] The product number obtained in this example is 2, and its purification effect is shown in Tables 1 to 4.

[0061] Similarly, when the chemical composi...

Embodiment 3

[0063] Take a stainless steel wire mesh containing 25% Cr with a wire diameter of 0.3mm and a mesh side length of 1mm. The stainless steel mesh is made into a plate, corroded in 6% oxalic acid, washed with water, and anodized to form an oxide film on the wire. ; Take 100 parts by weight of γ-Al 2 O 3 Moisten with water, stir well, add 1 part by weight of concentrated HNO 3 Beating, adding 1 part by weight of binder Al(NO 3 ) 3 ·9H 2 O, then add 15 parts by weight of CeO 2 Powder, 5 parts by weight of La 2 O 3 Powder, 2 parts by weight of ZrO 2 Stir the powder into a slurry, then immerse the oxidized stainless steel mesh into the slurry, take it out after 4 minutes, blow off the excess paint with compressed air, and dry it at 100°C for two hours before drying , The tube furnace can be used for continuous feeding and discharging, the middle section of the furnace is a constant temperature section, and the constant temperature is 500 ℃.

[0064] Put the stainless steel wire mesh obta...

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Abstract

This invention discloses a low-temperature plasma air purification catalytic reactor, in addition to a preparing method, which can be used for removing the secondary pollution of O3 and cleaning air with volatile organics. The reactor comprises a corona discharge power and several pipe-type or plate-pipe type corona discharge devices connected in parallel, wherein inside the anode of the corona discharge devices has a catalyst web whose shape and size is corresponding to the anode, and the web comprises stainless steel cloth and catalyst layer covering the cloth; the catalyst layer comprises the carrier material and active component, wherein the carrier material comprises gamma-Al2O3,CeO2,La2O3 and ZrO2, while the active component comprises one or two elements of Pd, Rh, Pt.

Description

Technical field [0001] The invention relates to a low-temperature plasma air purification catalytic reactor and a preparation process of the reactor. Background technique [0002] With the continuous improvement of living standards, people have higher and higher requirements for indoor air quality. The main purpose of the existing air purification technology is to remove smoke, organic matter, sterilization, disinfection, and deodorization. According to the working principle, it can be divided into filtration, Absorption, activated carbon adsorption, high-voltage static electricity and low-temperature plasma, ultraviolet light, photocatalyst, etc., the existing technology is often a combination of one or more of the above technical means. Some medium and coarse particles can be removed by filtration technology, but aerosols are difficult to remove; the use of absorption technology to remove organic matter requires periodic replacement, and it will pollute the environment when the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86
Inventor 李毅民孙世玉
Owner BEIJING CLEAR SKY CATALYST
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