CN103517752A - Air purification system including adsorption unit provided with catalyst and method of manufacturing the adsorption unit - Google Patents

Air purification system including adsorption unit provided with catalyst and method of manufacturing the adsorption unit Download PDF

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Publication number
CN103517752A
CN103517752A CN201280023029.0A CN201280023029A CN103517752A CN 103517752 A CN103517752 A CN 103517752A CN 201280023029 A CN201280023029 A CN 201280023029A CN 103517752 A CN103517752 A CN 103517752A
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Prior art keywords
unit
air
pollutant
cleaning system
clean unit
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CN201280023029.0A
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Chinese (zh)
Inventor
李贤宰
金世中
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ENBLON Co Ltd
Enbion Inc
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ENBLON Co Ltd
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Publication of CN103517752A publication Critical patent/CN103517752A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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    • B01D53/261—Drying gases or vapours by adsorption
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  • Thermal Sciences (AREA)
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  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

Disclosed herein is an air purification system having an adsorption unit provided with a catalyst, including: a first purification unit having a structure including an adsorbing member for adsorbing gaseous pollutants included in externally-supplied air, and a catalytic member for purifying the gaseous pollutants adsorbed on the adsorbing member by an oxidation reaction; a desorption unit for desorbing the gaseous pollutants adsorbed in the first purification unit by supplying air toward the first purification unit; and a second purification unit for purifying air including the gaseous pollutants desorbed from the first purification unit, wherein the desorption unit desorbs the gaseous pollutants adsorbed on a predetermined region of the first purification unit while the first purification unit is rotated. The air purification system is advantageous in that gaseous pollutants included in inflowing air can be primarily and secondarily purified, thus improving purification performance.

Description

Comprise the air cleaning system of the absorbing unit that is equipped with catalyst and the method for this absorbing unit of manufacture
Technical field
The present invention relates to comprise the air cleaning system of the absorbing unit that is equipped with catalyst and the method for this absorbing unit of manufacture, and relate more specifically to comprise the air cleaning system of the absorbing unit that is equipped with catalyst and the method for this absorbing unit of manufacture, this absorbing unit can be removed gas pollutant effectively from contaminated air.
Background technology
Conventionally, air cleaning system is widely used as processing the method for pollutant, such as bacterium contained in the air in home dwelling, main facilities or industrial occasions, peculiar smell, VOC (VOC) and other harmful components, process, clean air is provided.
This type of air cleaning system comprises: a plurality of filters for the treatment of particulate matters such as dust and bacterium; And for the treatment of the odor removal filter of gaseous matters such as peculiar smell, VOC and harmful components.As the filter for the treatment of particulate matter, the general sieve formula filter that utilizes particle screening effect and the electrostatic filter that utilizes electrostatic phenomenon of using.
And, for the odor removal filter for the treatment of gaseous matter, the general ADSORPTION IN A FIXED BED filter that utilizes active carbon and zeolite and the ozone oxidation filter that utilizes ozone of using.
Yet, the problem of ADSORPTION IN A FIXED BED filter is: the desorb that is adsorbed pollutant is subject to the impact such as the external factor of temperature and concentration etc., because equilibrium adsorption rate (equilibium adsorptivity) becomes low at low temperatures, and the absorption of pollutant is undertaken by physical bond, and its useful life shortens, because it does not have self-regeneration (self-regeneration) function.
The benefit of ozone oxidation filter is: it can be used and for a long time without replacing, because what it used is the oxidability of ozone, but its problem is: when unreacted ozone is discharged into outside, can cause asthma and allergy etc., because ozone is environmental contaminants.
Summary of the invention
Technical problem
Therefore, design the present invention and solve the problems referred to above, and the object of this invention is to provide a kind of a kind of air cleaning system and method for manufacturing absorbing unit that comprises absorbing unit, wherein, this absorbing unit can purify for the gas pollutant comprising in leaked-in air more efficiently, and purification efficiency can be maintained for a long time.
Solution for problem
In order to realize object above, one aspect of the present invention provides a kind of air cleaning system with the absorbing unit that is equipped with catalyst, described air cleaning system comprises: the first clean unit, it has the structure that comprises absorbed portion and catalysed partial, described absorbed portion adsorbs for the gas pollutant that the air of externally supply is comprised, and described catalysed partial is for purifying by oxidation reaction the gas pollutant adsorbing on described absorbed portion; Desorb unit, for by the gas pollutant that comes desorb to adsorb at described the first clean unit to described the first clean unit supply air; And, the second clean unit, for purifying comprising from the air of the gas pollutant of described the first clean unit desorb, wherein, the described desorb unit gas pollutant that desorb is adsorbed in the presumptive area of described the first clean unit when described the first clean unit is rotated.
At this, described catalysed partial can comprise at least one that select group that free platinum, rhodium, cobalt, molybdenum and palladium form.
And, when by described desorb unit desorption gas pollutant, can carry out oxidation reaction.
And described absorbed portion can comprise at least one that select group that free zeolite, activated alumina and porous silica form.
And described the second clean unit can comprise: heat exchange unit, for carrying out heat exchange to comprising from the air of the gas pollutant of described the first clean unit desorb; Pollutant recovery unit, for from by air gas recovery pollutant and the water of described heat exchange unit; And air feeding unit, for having passed through the air of described pollutant recovery unit to described the first clean unit supply.
And described pollutant recovery unit can be condenser.
Described air cleaning system may further include pollutant removal unit, and it is positioned at the upstream end of described the first clean unit, and removes the gas pollutant comprising in the air of described outside supply.
In order to realize object above, another aspect of the present invention provides a kind of manufacture to be equipped with the method for the absorbing unit of catalyst, comprises step: (a) catalysed partial is dissolved in solvent, to form the first solution; (b) to described the first solution, add absorbed portion, to form the second solution; (c) described the second solution is carried out to ultrasonic wave processing so that described catalysed partial is combined with described absorbed portion; (d) the described absorbed portion of being combined with described catalysed partial is dried; And the absorbed portion of (e) dried and described catalysed partial being combined activates.
Beneficial effect of the present invention
According to the benefit of air cleaning system of the present invention, be: can carry out firsts and seconds purification for the gas pollutant comprising in leaked-in air, therefore improve purifying property.
And, according to the benefit of air cleaning system of the present invention, be: carry out at low temperatures the technique that purifies for gas pollutant with catalytic oxidation, make not need in addition air heater, oxidation reactor and temperature controller etc., reduce thus its size and production cost.
And, according to the benefit of air cleaning system of the present invention, be: gas recovery pollutant more easily, because they can be liquefied.
And, according to the benefit of air cleaning system of the present invention, be: sorption and desorption gas pollutant continuously in described the first clean unit, therefore keep the purification efficiency of described the first clean unit, and increased the useful life of described the first clean unit simultaneously.
Accompanying drawing explanation
The detailed description below of carrying out in conjunction with the drawings, will more clearly understand above and other object of the present invention, feature and other advantages, in the accompanying drawings:
Fig. 1 is according to the block diagram of air cleaning system that is equipped with the absorbing unit of catalyst comprising of the first embodiment of the present invention;
Fig. 2 and Fig. 3 are the schematic diagrames of operation of the first clean unit of explanation air cleaning system;
Fig. 4 is the block diagram of the air cleaning system that comprises the absorbing unit that is equipped with catalyst according to a second embodiment of the present invention; And
Fig. 5 is the flow chart that the method for manufacturing absorbing unit is shown.
The specific embodiment
Below, with reference to accompanying drawing, describe the preferred embodiments of the present invention in detail.In institute's drawings attached, identical drawing reference numeral is used for indicating same or similar parts, and has omitted the explanation repeating.And, in explanation of the present invention, when determining that the detailed description of prior art will be obscured purport of the present invention, by the description thereof will be omitted.And technological thought of the present invention is not limited to these embodiment, and can be carried out by those skilled in the art.
Fig. 1 is according to the block diagram of air cleaning system that is equipped with the absorbing unit of catalyst comprising of the first embodiment of the present invention, and Fig. 2 and Fig. 3 are the schematic diagrames of operation of the first clean unit of explanation air cleaning system.
As shown in Figure 1 to Figure 3, according to the air cleaning system 1 of the first embodiment of the present invention, comprise the first clean unit 10, desorb unit 20 and the second clean unit 30.
The gas pollutant comprising in the air (a1) of the first clean unit 10 for externally supply adsorbs and purifies.
In this case, the first clean unit 10 can have the structure that comprises following part: absorbed portion, for the gas pollutant comprising at leaked-in air (a1) is adsorbed; And catalysed partial, for purifying for the gas pollutant adsorbing on absorbed portion by oxidation reaction.
And, can rotate in a predetermined direction the first clean unit 10, and can for example, in the lower oxidation reaction of carrying out the gas pollutant in catalysed partial of low temperature (, 20～200 ℃).
And absorbed portion can comprise at least one in zeolite, activated alumina and porous silica, and catalysed partial can comprise at least one in platinum, rhodium, cobalt, molybdenum and palladium.As the example that comprises the structure of absorbed portion and catalysed partial, when sorbing material is porous silica, a plurality of holes that this structure can be configured such that to use catalytic portions to assign to be coated in and forms in absorbed portion.
Therefore, in the first clean unit 10, this absorbed portion comprises gas pollutant is had at least one in zeolite, activated alumina and the porous silica of good adsorptivity, can adsorb for the gas pollutant comprising in the air (a1) of externally supplying, and this catalysed partial comprises gas pollutant is had at least one in good reactive platinum, rhodium, cobalt, molybdenum and palladium, can for gas pollutant, purify by low temperatures gas pollutant being carried out to oxidation reaction.
Desorb unit 20 is by the gas pollutant adsorbing the first clean unit 10 from the first clean unit 10 desorbs to the first clean unit 10 supply air.
In this case, the gas pollutant that desorb unit 20 can adsorb the first clean unit 10 from the first clean unit 10 desorbs by the predetermined binding domain supply air to the first clean unit 10.Below, with reference to Fig. 2, describe the technique of using the gas pollutant that 20 desorbs of desorb unit adsorb in the first clean unit 10 in detail.
Desorb unit 20 may further include heating unit, for heating to the air (a3) of the predetermined binding domain supply of the first clean unit 10.
At this, desorb unit 20 comprises that the reason of the heating unit that the air (a3) for the predetermined binding domain supply of subtend the first clean unit 10 heats is, by making to be equal to or higher than to the temperature of the air (a3) of the binding domain supply of the first clean unit 10 adsorption temp of gas pollutant, can easily carry out the desorb that gas pollutant leaves the binding domain of the first clean unit 10 and the oxidation reaction of the gas pollutant being undertaken by catalysed partial.
The temperature that is heated the air (a3) of unit heating can be 50～500 ℃, and preferably 100～300 ℃.
The second 30 pairs of clean units air purifies, in the air of accepting to purify, comprise accessory substance, water and gas pollutant, these accessory substances, water and gas pollutant are that then this gas pollutant produces through peroxidization because desorb unit 20 goes out gas pollutant from the first clean unit 10 desorbs.
In this case, the second clean unit 30 comprises: heat exchange unit 32, for carrying out heat exchange to comprising from the air (a4) of the gas pollutant of the first clean unit 10 desorbs; Pollutant recovery unit 34, for from by air (a5) gas recovery pollutant and the water of heat exchange unit 32; And air feeding unit 36, for having passed through the air (a6) of pollutant recovery unit 34 to the first clean unit 10 supplies.
At this, pollutant recovery unit 34 can be condenser, and it can be by making gas pollutant liquefaction receive back and forth gas pollutant.
Thus, in the second clean unit 30, pollutant recovery unit 34 is by carrying out from passing through gas recovery pollutant the air (a5) of heat exchange unit 32 gas pollutant liquefaction, and air feeding unit 36 is supplied to the first clean unit 10 by air (a6) (pollutant recovery unit 34 is gas recovery pollutant from air a6), so that be supplied to remaining gas pollutant in the air (a7) of the first clean unit 10, further purified.
As shown in Figure 2, the air (a1) that the first clean unit can externally be supplied adsorbs the gas pollutant comprising in this air during by the first clean unit 10.
The first clean unit 10 is rotation continuously in a predetermined direction.In this case, because gas pollutant be attracted to the binding domain (d2) of the first clean unit 10 upper and then the rotation by the first clean unit 10 to be positioned in its desorbent zone (d1) upper, so can come from the first clean unit 10 desorption gas pollutants by the air (a3) to its desorbent zone (d1) supply.
Therefore, in the first clean unit 10, because sorption and desorption gas pollutant continuously, so can self-regeneration the first clean unit 10, therefore keep the purification efficiency for gas pollutant, and increased the useful life of the first clean unit 10 simultaneously.
And, as shown in Figure 3, the air (a1) of the outside supply of air inclusion pollutant is by the binding domain (d2) of the first clean unit 10, and be then cleaned, and can be by coming desorb to be positioned at the gas pollutant its desorbent zone (d1) from desorb unit 20 to the air (a3) of its desorbent zone (d1) supply.
In this case, can be by a part (a11) for the air (a1) of outside supply as air (a3).This air (a11) is being converted to desorbent zone (d1) for cooling the region (d3) that binding domain (d2) exists before.
Fig. 4 is the block diagram of the air cleaning system that comprises the absorbing unit that is equipped with catalyst according to a second embodiment of the present invention.
As shown in Figure 4, air cleaning system 1 according to a second embodiment of the present invention comprises: the first clean unit 10; Pollutant removal unit 40, it is positioned at the first clean unit 10 upstream, and removes gas pollutant from the air of outside supply; Post-processing unit 50, it is positioned at the first clean unit 10 downstream, and removes remaining particulate pollutant and gas pollutant in passing through the air of the first clean unit 10; Desorb unit 20; And, the second clean unit 30.
At this, pollutant removal unit 40 can be primary air filter (air filter), performance air cleaner (medium filter), HEPA filter (high-efficient granule air cleaner) or electrostatic filter, and post-processing unit 50 can be for removing the active carbon filter of gas pollutant or for removing HEPA or the electrostatic filter of particulate pollutant.A plurality of pollutant removals unit 40 and a plurality of post-processing unit 50 can lay respectively at the upstream and downstream of the first clean unit 10.
Fig. 5 is the flow chart that the method for manufacturing the absorbing unit that is equipped with catalyst is shown.
As shown in Figure 5, manufacture is equipped with the method for the absorbing unit of catalyst to comprise step below.First, catalysed partial is dissolved in to (S10) in solvent.
At step 10(S10) in, solvent can be the mixed solvent of water, ethanol or water and ethanol, and catalysed partial can comprise at least one in platinum, rhodium, cobalt, molybdenum and palladium.Catalysed partial can be placed in the mixed solvent of water, ethanol or water and ethanol with the amount of 0.01～25wt% of the amount based on absorbed portion.
At step 10(S10) after, the method may further include step: stir the solution that comprises catalysed partial.
Subsequently, to the solution that comprises catalysed partial, add absorbed portion (S20).
At step 20(S20) in, absorbed portion can comprise at least one in zeolite, activated alumina and porous silica.
Subsequently, the solution that comprises catalysed partial and absorbed portion is carried out to ultrasonic wave processing, catalysed partial is combined to (S30) with absorbed portion.
At step 30(S30) in, the ultrasonic wave that can carry out absorbed portion by supersonic generator is processed, and its ultrasonic treatment time can be 2 hours or still less, and preferably 20～60 minutes.
Subsequently, take out the absorbed portion of being combined with catalysed partial and it is dried to (S40).
At step 40(S40) in, can be at 50～200 ℃ of temperature dry absorbed portion of being combined with catalysed partial.Carry out the dry of the absorbed portion of being combined with catalysed partial to remove and be dried remaining slurries in absorbed portion.
Subsequently, with hydrogen or such as the inert gas of helium or nitrogen, with catalytic way, activate dried absorbed portion (S50).
At step 50(S50) in, can be 100～500 ℃ of temperature, and preferably at 200～300 ℃, carry out the catalytic activation of dried absorbed portion, and its catalytic activation time can be 5 hours or still less, and is preferably 2 hours.
And, at step 50(S50) in, when activating the absorbed portion of being combined with catalysed partial with catalytic way, prepare the absorbing unit that is equipped with catalyst according to an embodiment of the invention.The absorbing unit that is equipped with catalyst can be the structure that comprises following part: absorbed portion, and it comprises at least one in zeolite, activated alumina and porous silica; And, catalysed partial, it comprises at least one in platinum, rhodium, cobalt, molybdenum and palladium.
According to of the present invention, comprise that the air cleaning system 1 of the absorbing unit that is equipped with catalyst allows the first clean unit 10 by the gas pollutant comprising in the air of externally supply is adsorbed these gas pollutants are carried out to first class purification, and allow the second clean unit 20 by carrying out secondary purification for liquefying and retrieve from the gas pollutant of the first clean unit 10 desorbs by desorb unit 20 for these gas pollutants, improve thus the purifying property of air cleaning system 1.
And, according to air cleaning system 1, the technique that catalytic oxidation by the gas pollutant with catalysed partial purifies for the gas pollutant adsorbing on absorbed portion is carried out at low temperatures, make not need in addition air heater, oxidation reactor and temperature controller etc., reduce thus its size and production cost.
And, according to air cleaning system 1, because pollutant recovery unit 34 can be by gas pollutant and water condensation are received to gas pollutant back and forth, so can more easily remove gas pollutant.
And, according to air cleaning system 1, sorption and desorption gas pollutant continuously in the first clean unit 10, making can self-regeneration the first clean unit 10, has kept thus the purification efficiency of the first clean unit 10 and has increased the useful life of the first clean unit 10 simultaneously.
To make comparisons according to the purifying property of the air cleaning system that comprises absorbing unit (platinum that comprises 0.1wt%) of the present invention and traditional air cleaning system, and in table 1, provide its result below.And, in table 2 below, provide according to the measurement result of the purifying property of the air cleaning system that comprises absorbing unit of the present invention.
Table 1
[table]
Table 2
[table]
Gas pollutant Entrance (ppm) Outlet (ppm) Final handling rate (%) Running time (hour)
HCHO 5.2 0.8 84.6 50
H 2S 12.5 2.5 80.0 50
NH 3 13.5 0.6 95.6 50
CO 4.2 0 100.0 50
O 3 5.5 0 100.0 50
As provided in the table 1 above, respectively by traditional air cleaning system and air cleaning system of the present invention operation 50 hours, and then, using air cleaning system of the present invention for the toluene (C as gas pollutant 7h 8) purifying property and conventional air cleaning system for toluene (C 7h 8) purifying property make comparisons.As a result, can determine, the purifying property of air cleaning system of the present invention improves about 50% than conventional air cleaning system.
And, at table 2, provide, by air cleaning system operation of the present invention 50 hours, and then, measure air cleaning system of the present invention for the formaldehyde as gas pollutant (HCHO), hydrogen sulfide (H 2s), ammonia (NH 3), carbon monoxide (CO) and ozone (O 3) purifying property.As a result, can determine that it is for formaldehyde (HCHO), hydrogen sulfide (H 2s), ammonia (NH 3), carbon monoxide (CO) and ozone (O 3) purifying property be respectively 84.6%, 80%, 95.6%, 100% and 100%.
Although for illustrative object discloses the preferred embodiments of the present invention, but those skilled in the art can understand, do not departing under the prerequisite of disclosed scope and spirit of the present invention in the appended claims various modifications, increase and to substitute be possible.Disclosed embodiment and accompanying drawing are presented illustration the present invention in the present invention, and scope of the present invention is not limited to this.Therefore, any and whole modifications, change or equivalent arrangements should be considered within the scope of the invention, and disclose detailed scope of the present invention by appended claim.

Claims (14)

1. an air cleaning system, it has the absorbing unit that is equipped with catalyst, and described air cleaning system comprises:
The first clean unit, it has the structure that comprises absorbed portion and catalysed partial, described absorbed portion adsorbs for the gas pollutant that the air of externally supply is comprised, and described catalysed partial is for purifying for the gas pollutant adsorbing on described absorbed portion by oxidation reaction;
Desorb unit, for by the gas pollutant that comes desorb to adsorb at described the first clean unit to described the first clean unit supply air; And
The second clean unit, for purifying the air comprising from the gas pollutant of described the first clean unit desorb,
Wherein, the described desorb unit gas pollutant that desorb is adsorbed in the presumptive area of described the first clean unit when described the first clean unit is rotated.
2. air cleaning system according to claim 1, wherein, described catalysed partial comprises at least one that select group that free platinum, rhodium, cobalt, molybdenum and palladium form.
3. air cleaning system according to claim 1, wherein, when by described desorb unit desorption gas pollutant, carries out described oxidation reaction.
4. air cleaning system according to claim 1, wherein, described absorbed portion comprises at least one that select group that free zeolite, activated alumina and porous silica form.
5. air cleaning system according to claim 1, wherein, described the second clean unit comprises: heat exchange unit, for carrying out heat exchange to comprising from the air of the gas pollutant of described the first clean unit desorb; Pollutant recovery unit, for reclaiming described gas pollutant and water from the air by described heat exchange unit; And air feeding unit, for having passed through the air of described pollutant recovery unit to described the first clean unit supply.
6. air cleaning system according to claim 5, wherein, described pollutant recovery unit is condenser.
7. air cleaning system according to claim 1, further comprises pollutant removal unit, and it is arranged in the upstream end of described the first clean unit and removes the gas pollutant comprising at the described outside air of supplying.
8. manufacture is equipped with a method for the absorbing unit of catalyst, comprises step:
(a) catalysed partial is dissolved in solvent, to form the first solution;
(b) to described the first solution, add absorbed portion, to form the second solution;
(c) described the second solution is carried out to ultrasonic wave processing so that described catalysed partial is combined with described absorbed portion;
(d) the described absorbed portion of being combined with described catalysed partial is dried; And
(e) absorbed portion of dried and described catalysed partial being combined activates.
9. method according to claim 8, wherein, in step (a), described catalysed partial comprises at least one that select group that free platinum, rhodium, cobalt, molybdenum and palladium form.
10. method according to claim 8, wherein, in step (a), the amount of the described catalysed partial comprising is 0.01～25wt% of the amount based on described absorbed portion.
11. methods according to claim 8, wherein, in step (a), described absorbed portion comprises at least one that select group that free zeolite, activated alumina and porous silica form.
12. methods according to claim 8, wherein, in step (c), carry out described ultrasonic wave and process 20～60 minutes.
13. methods according to claim 8, wherein, in step (d), the described of described absorbed portion that carries out being combined with described catalysed partial at 50～200 ℃ is dried.
14. methods according to claim 8, wherein, in step (e), are used helium, nitrogen or hydrogen at the temperature of 100～500 ℃, to carry out described catalytic activation.
CN201280023029.0A 2011-05-12 2012-05-11 Air purification system including adsorption unit provided with catalyst and method of manufacturing the adsorption unit Pending CN103517752A (en)

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Application publication date: 20140115