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Air purification method combined of adsorption and heat catalytic oxidation regeneration in situ

A catalytic oxidation and thermal catalysis technology, which is applied in the fields of public health and environmental protection, to achieve the effect of solving the inconvenience of replacing the adsorbent, overcoming high energy consumption, and solving the effect of limited life of the adsorbent

Inactive Publication Date: 2008-12-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also combines the effects of adsorption and plasma oxidation, and has the same shortcomings as the aforementioned patents

Method used

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  • Air purification method combined of adsorption and heat catalytic oxidation regeneration in situ
  • Air purification method combined of adsorption and heat catalytic oxidation regeneration in situ

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The air to be treated contains 2.12mg / m 3 Formaldehyde, 10.11mg / m 3 Benzene series (2.21mg / m 3 Benzene, 6.11mg / m 3 Toluene and 1.79mg / m 3 xylene), the air to be treated first passes through the particle filter 1 under the suction of the blower fan 2 to remove the particles mixed in the air.

[0036] (2) Utilize the porous material 3 with both adsorption and catalytic functions and the porous material 4 with protective adsorption function to adsorb low-concentration formaldehyde and benzene series in the air.

[0037] The porous material 3 with both adsorption and catalytic functions is activated alumina loaded with 0.5% Pt (Pt / Al 2 o 3 ); The porous material 4 that plays a protective adsorption role is activated carbon particles (Mn / AC) impregnated with 1% manganese oxide.

[0038] The air filtered by the particle filter 1 first passes through the Pt / Al 2 o 3 , and then through Mn / AC, the space velocity is 3×10 4 h -1 .

[0039] (3) monitor the concentrat...

Embodiment 2

[0045] (1) The air to be treated contains 3.20mg / m 3 Formaldehyde, 8.10mg / m 3 Benzene series (0.96mg / m 3 Benzene, 2.58mg / m 3 Toluene and 4.56mg / m 3 xylene), the air to be treated first passes through the particle filter 1 under the suction of the blower fan 2 to remove the particles mixed in the air.

[0046] (2) Utilize the porous material 3 with both adsorption and catalytic functions and the porous material 4 with protective adsorption function to adsorb low-concentration formaldehyde and benzene series in the air.

[0047] The porous material 3 with both adsorption and catalytic functions is 13X molecular sieve (Au / 13XMS) loaded with 2% Au; the porous material 4 with protective adsorption function is activated carbon particles (AC).

[0048] The air filtered by particle filter 1 first passes through Au / 13XMS, and then passes through AC with a space velocity of 3×10 4 h -1 .

[0049] (3) With the help of instruments or people's sense of smell, the concentration of fo...

Embodiment 3

[0055] (1) The air to be treated contains 4.1mg / m 3 Formaldehyde, 8.10mg / m 3 Benzene series (0.96mg / m 3 Ethylbenzene, 6.58mg / m 3 Styrene and 0.56mg / m 3 Cumene), the air to be treated first passes through the particle filter 1 under the suction of the blower fan 2 to remove the particles mixed in the air.

[0056] (2) Utilize the porous material 3 with both adsorption and catalytic functions and the porous material 4 with protective adsorption function to adsorb low-concentration formaldehyde and benzene series in the air.

[0057] The porous material 3 with both adsorption and catalytic functions is titanium dioxide loaded with 1% Pt (Pt / TiO 2 ); the porous material with protective adsorption is activated carbon fiber (Mn / ACF) impregnated with 6% manganese oxide on the surface.

[0058] The air filtered by the particle filter 1 first passes through the Pt / TiO 2 , and then through Mn / ACF, the space velocity is 3×10 4 h -1 .

[0059] (3) With the help of instruments or ...

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Abstract

The invention discloses a method for purifying air by combining adsorption and in-situ heat catalytic oxidation regeneration. The method uses a porous material with adsorption and catalysis functions and a porous material with protective adsorption to adsorb low concentration of formaldehyde and benzene series in the air; when the adsorption of the porous material approaches to saturation, electrical heating is started to activate the catalytic activity of the porous material with the adsorption and catalysis functions, thereby catalytically oxidizing the formaldehyde and the benzene series which are adsorbed on the surface of the porous material into carbon dioxide and water; at the same time, the adsorption capability of the porous material is regenerated; the regenerated porous material is reused for adsorption; thus air purification can be realized through the circulation. The method has the advantages of high efficiency, energy conservation, low cost, no secondary pollution and so on. The method is suitable for purifying air containing the low concentration formaldehyde and the benzene series in a building, a cabin or other restricted spaces.

Description

technical field [0001] The invention belongs to the field of public health and environmental protection, and relates to a limited space that uses adsorption and in-situ thermal catalytic oxidation regeneration to deal with poor ventilation, including the interior of buildings on the ground, semi-underground or underground, and airtight or semi-closed cabins. A method for purifying low-concentration formaldehyde and benzene series (benzene, toluene, xylene, ethylbenzene, styrene and cumene) in the air to obtain clean air. Background technique [0002] Residences, underground parking lots, civil air defense projects, underground passages, crowded public places and building interiors, as well as cabin ambient air quality and human health, life safety, physical performance, and indoor supplies, weapons and equipment of various types of transportation and transportation vehicles , Instrument performance is closely related. However, due to the enclosure effect of building materia...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01D53/86B01D46/10
Inventor 朱天乐樊星王美艳陈运法
Owner BEIHANG UNIV
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