CN104941571B - Adsorption catalyst and its preparation method and application and a kind of air cleaning unit and air purification method and its application - Google Patents
Adsorption catalyst and its preparation method and application and a kind of air cleaning unit and air purification method and its application Download PDFInfo
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- CN104941571B CN104941571B CN201510308746.3A CN201510308746A CN104941571B CN 104941571 B CN104941571 B CN 104941571B CN 201510308746 A CN201510308746 A CN 201510308746A CN 104941571 B CN104941571 B CN 104941571B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The present invention relates to air purification field, specifically provides a kind of adsorption catalyst and its preparation method and application, and the catalyst includes：Ordered structure carrier and the coating for being distributed in ordered structure inner surface of the carrier and/or outer surface；On the basis of the gross weight of the coating, hydrophobic silica and the 5 50 weight % catalytic active component that gaseous contaminant can be aoxidized that the coating contains 50 95 weight %.The invention provides a kind of air cleaning unit and a kind of air purification method and its application.The catalyst of the present invention enhances gaseous contaminant, the process that especially nonpolar gaseous contaminant is adsorbed in the porous duct of catalyst, spread, has good catalyticing purifying effect.The catalytic purification that the catalyst of the present invention is particularly suitable for use under high steam and high humility operating mode reacts.The method for preparing adsorption catalyst of the present invention, technique is simple, cost is low, possesses the potentiality of industrialized production.
Description
Technical field
The present invention relates to a kind of adsorption catalyst, and a kind of preparation method of adsorption catalyst, and a kind of adsoption catalysis
Application of the agent in purification of air；And a kind of air cleaning unit and a kind of air purification method and its with purification of air
Application in the household electrical appliance of function.
Background technology
Gaseous contaminant inside closing space is varied, but with formaldehyde, ozone, benzene homologues (benzene, toluene, diformazan
Benzene) it is major pollutants.Purification of air processing in closing space, relatively more is absorption method and catalytic purification at present
Method.The purpose of gaseous contaminant is removed as absorption method is reached by the absorption of gaseous contaminant on the sorbent, but absorption method
It is physical method, gaseous contaminant easily reaches adsorption saturation on the sorbent, the no longer adsorptive gaseous dirt of adsorbent after saturation
Thing is contaminated, is desorbed on the contrary under certain environment, forms pollution source.Such as catalytic purification method, urged by gaseous contaminant
The heat catalysis on agent surface, generates water and carbon dioxide reaches the purpose for removing pollutant, but at ambient temperature, mesh
Preceding only a small number of gaseous contaminants can realize degraded (such as ozone), other pollutants (such as formaldehyde, benzene homologues etc.) respectively
Degraded could be realized under the conditions of 100-300 DEG C.
The shortcomings that based on above Single Pollution thing degradation technique, it is one collection absorption and thermocatalytic two kinds of technologies of degraded occur
The air purifying process of body, a kind of the purification that is combined with heat catalytic oxidation regeneration in situ is adsorbed as CN101314101A is reported
Air method, by detecting degree of absorption, automatically controlled heating is controlled to realize the cyclic process of adsoption catalysis purification；And for example
CN1119262A disclose applied to a kind of in air conditioner be supported on can electrical heating carrier catalytic module, heating carrier with
It is connected between adsorbent, platinum with silicone film, adsorbent plays absorption and catalytic action respectively with platinum.Reach certain degree of absorption
Afterwards, start heating and realize that thermocatalytic purifies.
But above-mentioned technology, due to the difference of thermal coefficient of expansion, adsoption catalysis component and electricity can be caused by frequently heating cooling
The stripping of heating carrier, i.e. adsoption catalysis component are low with the bond strength of electrical heating carrier.The low suction of another aspect specific surface area
The practical application of the attached less adsorption capacity limiting catalyst of layer, while traditional hydrophilic-structure has to the catalytic activity of catalyst
There is negative effect.
The content of the invention
It is an object of the invention to for insufficient existing for existing adsorption cleaning, there is provided one kind has hydrophobic surface, height
Adsorption capacity and adsorption catalyst and preparation method with high carrier bond strength.
To realize object defined above, according to the first aspect of the invention, the present invention provides a kind of adsorption catalyst, the catalyst
Including：Ordered structure carrier and the coating for being distributed in ordered structure inner surface of the carrier and/or outer surface；With the gross weight of the coating
On the basis of amount, the coating contain 50-95 weight % hydrophobic silica and 5-50 weight % can be by gaseous contamination
The catalytic active component of thing oxidation.
According to the second aspect of the invention, the invention provides a kind of method for preparing catalyst of the present invention, wherein,
This method includes：
(1) a kind of coating is prepared, the catalysis that the coating contains silica source and can aoxidize gaseous contaminant is lived
Property component source；
(2) coating is coated or impregnated with ordered structure carrier, calcined after drying；
Wherein, the temperature of the calcining causes silica source to be converted into hydrophobic silica, and higher than in coating
Organic matter ablation temperature.
According to the third aspect of the invention we, the invention provides catalyst of the present invention in purification polluting objects containing
Air in application.
According to the fourth aspect of the invention, the invention provides a kind of air cleaning unit, the air cleaning unit bag
Clean unit is included, the clean unit contains adsorption catalyst of the present invention.
According to the fifth aspect of the invention, the invention provides a kind of air purification method, this method to include：
(1) particulate matter in air to be clean is removed；
(2) in a heated condition, the air for removing particulate matter is contacted with adsorption catalyst；
(3) optionally, the air after being contacted with adsorption catalyst is humidified；Wherein, the adsorption catalyst is this
The described adsorption catalyst of invention.
According to the sixth aspect of the invention, the invention provides the air purification method of the present invention with purification of air work(
Application in the household electrical appliance of energy.
The catalyst of the present invention enhances gaseous contaminant, porous of the especially nonpolar gaseous contaminant in catalyst
Absorption, diffusion process, have good catalyticing purifying effect in road.
The catalytic purification that the catalyst of the present invention is particularly suitable for use under high steam and high humility operating mode reacts.
The method for preparing adsorption catalyst of the present invention, technique is simple, cost is low, possesses the potentiality of industrialized production.
The air cleaning unit of the present invention, clean unit use adsorption catalyst of the invention so that air of the invention
Purifier is effectively reduced purifying step, had a extensive future without additional Dehumidifying element.
The present invention air purification method can apply to air purifier or with air-cleaning function air conditioner,
In the household electrical appliance such as dehumidifier, possesses broad prospect of application.
The air purification method of the present invention, without being dehumidified, feeding clean unit enters after can directly removing particulate matter
Row purified treatment so that air purification method process of the invention simplifies, and effectively reducing purification cost and improve industry should
Use prospect.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of schematic flow sheet of the air purification method of the air cleaning unit using the present invention.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As it was previously stated, the invention provides a kind of adsorption catalyst, the catalyst includes：Ordered structure carrier and it is distributed in
Ordered structure inner surface of the carrier and/or the coating of outer surface；On the basis of the gross weight of the coating, the coating contains 50-
95 weight % hydrophobic silica and the 5-50 weight % catalytic active component that gaseous contaminant can be aoxidized.
The catalyst of the present invention has hydrophobic surface, is not only combined with high-adsorption-capacity and with high carrier strong
Degree.
Catalyst according to the invention, as long as ensureing that the catalyst contains hydrophobic silica and the present invention can be achieved
Purpose, for the present invention, methyl and/or fluoroalkyl are contained in preferably described hydrophobic silica surface.
Catalyst according to the invention, the methyl on preferably described hydrophobic silica surface and/or the content of fluoroalkyl
For with quantification of 120 ° -145 ° of hydrophobic angle test.
The particle diameter of catalyst according to the invention, preferably hydrophobic silica is 3-15nm, preferably 10-15nm.
The specific surface area of catalyst according to the invention, preferably hydrophobic silica is 600-1000m2/ g, it is preferably
610-750m2/g。
In the present invention, particle diameter, specific surface area are determined by laser particle analyzer and BET specific surface area instrument respectively.
A preferred embodiment of the invention, the hydrophobic silica surface is rich in methyl and/or fluothane
Base, preferably particle diameter 3-15nm, 10-15nm, specific surface area 600-1000m2/ g, preferably 610-750m2/g。
Catalyst according to the invention, the thickness of preferred coatings is 5-1000 μm, preferably 150-1000 μm.
Catalyst according to the invention, the catalytic active component that can aoxidize gaseous contaminant can be this area
Conventional selection, for the present invention, the preferably described catalytic active component that can aoxidize gaseous contaminant be metal oxide
And/or precious metal simple substance, preferably MnOx、Co3O4、FeOx、CuO、NiO、TiO2、Al2O3, in Pt, Pd, Au, Ru, Rh and Ag
It is one or more.
It is preferably described to be by the catalytic active component that gaseous contaminant aoxidizes according to one embodiment of the present invention
The mixture of metal oxide and precious metal simple substance, wherein, preferably described metal oxide is TiO2And/or Al2O3, it is described expensive
Metal simple-substance is the one or more in Pt, Pd, Au, Ru, Rh and Ag.
It is preferably described to be by the catalytic active component that gaseous contaminant aoxidizes according to one embodiment of the present invention
Metal oxide or precious metal simple substance, wherein, preferably described metal oxide is MnOx、Co3O4、FeOx, in CuO and NiO one
Kind is a variety of；The precious metal simple substance is the one or more in Pt, Pd, Au, Ru, Rh and Ag.
Catalyst according to the invention, the material of the ordered structure carrier can be the conventional selection of this area, for
The present invention, the material of preferably described ordered structure carrier are the one or more in metal material, ceramic material and material made of paper,
The ordered structure carrier is that honeycomb structure carrier, foaming structure carrier, chip architecture carrier, silk structure carrier and grain structure carry
One or more in body.
Catalyst according to the invention, for the ease of the adsorption catalyst of the present invention is applied into clean air package, enter
The preferably described ordered structure carrier of one step is foaming structure and/or honeycomb.
Catalyst according to the invention, preferably described metal material include one kind in Cu, Ni, Fe, Al, Cr and its alloy
Or a variety of, preferably Cu simple substance, Ni simple substance, Fe simple substance, Al simple substance, Fe-Cr-Al alloys, Fe-Cr-Ni alloys, Ni-Cr alloy
With the one or more in Ni-Fe alloys；The Ni-Cr that more preferably Al simple substance, Ni simple substance, Fe-Cr-Al alloys and surface are aluminized
One or more in alloy.
Catalyst according to the invention, preferably described ceramic material include cordierite, mullite and corundum in one kind or
It is a variety of, preferably mullite.
Catalyst according to the invention, preferably described material made of paper are brown paper and/or PP materials.
Catalyst according to the invention, preferably described coating also contain dispersant and/or thickener；It is preferred that the dispersant
And/or thickener is the one or more in PEG, PVA, gelatin, guar gum, beta-schardinger dextrin and hydroxymethyl cellulose.
The catalyst of the present invention can use various methods to synthesize, as long as ensureing that the catalyst that synthesis obtains has the present invention
Adsorption catalyst aforesaid properties, for the present invention, preferably described adsorption catalyst is prepared in accordance with the following steps：
(1) a kind of coating is prepared, the catalysis that the coating contains silica source and can aoxidize gaseous contaminant is lived
Property component source；
(2) coating is coated or impregnated with ordered structure carrier, calcined after drying；
Wherein, the temperature of the calcining causes silica source to be converted into hydrophobic silica, and higher than in coating
Organic matter ablation temperature.
The method according to the invention, wherein, coating can be coated using painting method commonly used in the art, pin
To the present invention, it is preferred to use air spraying method is coated.
The method according to the invention, dry temperature adjustable range is wider, general to may be selected 80-110 DEG C.
The method according to the invention, time optional wider range of calcining, the time preferably calcined are enough organic matter portion
Divide ablation, can specifically be selected according to needs.
The method according to the invention, optional wider range of the species of the silica source, as long as ensureing in the present invention
Calcining heat under can be converted into hydrophobic silica, for the present invention, preferably described silica source is described
Hydrophobic silica, aerosol silica and/or the organic matter that silica can be provided, wherein, it is described to provide
The organic matter of silica is, for example, organo-silicon ester, organic silicon ether etc., and for the present invention, preferably described silica source is that gas is molten
One or more in glue silica, Hexamethyldisiloxane and tetraethyl orthosilicate.
The method according to the invention, meet optional wider range of temperature of the calcining of aforementioned claim, for the present invention, preferably
Calcining heat is 300-400 DEG C.
A preferred embodiment of the invention, the silica source are aerosol silica, hexamethyl two
One or more in first silicon ether and tetraethyl orthosilicate, the calcining heat are 300-400 DEG C.
With the method for the invention it is preferred to the catalytic active component source that can aoxidize gaseous contaminant is to calcine
At a temperature of can be changed into the materials of metal oxide and/or metal oxide containing precious metals, preferably manganese salt, cobalt salt, molysite, mantoquita,
One or more in nickel salt, titanium salt, aluminium salt and precious metal salt.Particularly preferably manganese nitrate, cobalt nitrate, iron nitrate,
Copper nitrate, nickel nitrate, Titanium alkoxides, titanium nitrate, aluminium nitrate, noble metal nitrate, precious metal salt hydrochlorate and organic expensive
One or more in metal salt.Wherein, Titanium alkoxides are, for example, the isopropoxide of titanium, and organic precious metal salt is, for example, acetylacetone,2,4-pentanedione
Salt.
The method according to the invention, when the ordered structure carrier is metal material and/or ceramic material, the preferred party
Method also includes, and before coating and/or dipping, removes the impurity of the ordered structure carrier surface attachment, such as pass through pickling, water
Washed, be then dried and be removed.
The method according to the invention, when the ordered structure carrier is papery material, preferably this method also includes to institute
Ordered structure carrier is stated to be purged to remove the impurity such as the dust of carrier surface.
The method according to the invention, according to needs, before the coating and/or dipping is carried out, preferably this method also includes
Anodic oxidation is carried out to the ordered structure carrier.For example, when the ordered structure carrier is metal Al, anode can be used
The method of oxidation, deepen coarse structure in ordered structure carrier surface.
With the method for the invention it is preferred to the catalytic active component source that can aoxidize gaseous contaminant is to calcine
At a temperature of when can be changed into the material of metal oxide containing precious metals, this method also includes：The step of hydrogen reducing is carried out after calcining, its
In, the temperature of reduction is 150-300 DEG C.
As it was previously stated, the answering in the air of purification polluting objects containing the invention provides catalyst of the present invention
With.
Application according to the present invention, preferably described gaseous contaminant include formaldehyde, acetaldehyde, H2S、NH3, ozone, benzene homologues and
One or more in CO, preferably described gaseous contaminant are benzene homologues.
The invention provides a kind of air cleaning unit, the air cleaning unit includes clean unit 1, and the purification is single
Member contains adsorption catalyst of the present invention.
The apparatus according to the invention, preferably as shown in figure 1, the air cleaning unit includes：On air-flow direction
The prefiltering net 2 and clean unit 1 being sequentially arranged, wherein, the prefiltering net 2 is used to trap the particulate matter in air, and institute
The upstream side for stating clean unit 1 is disposed with the blower fan 3 of guiding air flow, and the downstream of the clean unit 1 is disposed with auxiliary
The auxiliary heating element 4 that the clean unit 1 heats, optional described device also include：Humidifying unit 5, the humidifying unit 5
For the air wetting purified to clean unit 1.
The apparatus according to the invention, the mode of heating of preferably described auxiliary heating element 4 is electric-heating-wire-heating, PTC-ceramic
One or more in piece heating, heating wire-mica sheet heating and Far-infrared Heating mode.
The apparatus according to the invention, the heat conduction distance between preferably described auxiliary heating element 4 and clean unit 1 is 0-
10cm。
The device of the present invention, clean unit use adsorption catalyst of the invention so that air cleaning unit of the invention
Without additional Dehumidifying element, purifying step is effectively reduced, is had a extensive future.
As it was previously stated, the invention provides a kind of air purification method, this method includes：
(1) particulate matter in air to be clean is removed；
(2) in a heated condition, the air for removing particulate matter is contacted with adsorption catalyst；
(3) optionally, the air after being contacted with adsorption catalyst is humidified；Wherein, the adsorption catalyst is this
The described adsorption catalyst of invention.
According to a kind of preferred embodiment of the present invention, as shown in figure 1, the method for the present invention is in air cleaning unit
Carry out, the air cleaning unit includes：The prefiltering net 2 and clean unit 1 being sequentially arranged on air-flow direction, its
In, the prefiltering net 2 is used to trap the particulate matter in air, and the upstream side of the clean unit 1 is disposed with guiding air
The blower fan 3 of flowing, the downstream of the clean unit 1 are disposed with the auxiliary heating element 4 for aiding in the clean unit 1 to heat,
Heat conduction distance between the auxiliary heating element 4 and clean unit 1 is 0-10cm, wherein, the auxiliary heating element 4 adds
Hot mode be electric-heating-wire-heating, the heating of PTC-ceramic piece, the heating of heating wire-mica sheet and one kind in Far-infrared Heating mode or
A variety of, optional described device also includes：Humidifying unit 5, the humidifying unit 5 are used to add the air that clean unit 1 purifies
Wet, the clean unit contains the adsorption catalyst；This method includes：
Air to be clean (being referred to as the pending air containing particulate matter, gaseous contaminant etc. in Fig. 1) is sent into purification of air
Device, wherein, the air to be clean is directed through the prefiltering net 2 by the blower fan 3 and removes particulate matter, then will go
Except the air of particulate matter contacts by the clean unit 1 with adsorption catalyst, then will be connect according to needs with adsorption catalyst
Air after touch is sent into the humidifying unit 5 and humidified, wherein, the clean unit 1 is heated by auxiliary heating element 4,
Finally give clean air.
The method according to the invention, wherein, the relative humidity of air preferably to be clean is 50-70%.
With the method for the invention it is preferred to the temperature of contact is 150-250 DEG C in step (2).
The invention provides air purification method of the present invention in the household electrical appliance with air-cleaning function
Using.
Application according to the present invention, the household electrical appliance be air purifier, have air-cleaning function air conditioner and
One or more in dehumidifier.
In the present invention, relative humidity refers to the aerial vapour pressure of water and the saturated vapor of water under synthermal same pressure
The ratio of pressure.
Make exemplary illustration to the present invention below by embodiment, but the present invention is not limited to this.
Embodiment 1
The preparation of adsoption catalysis catalyst：
(1) by hydrophobicity SiO2(particle diameter is 14.2nm by laser particle analyzer test, and hydrophobic angle test is 121.1 °, than
Surface area is 615.3m2/ g), manganese nitrate：Cobalt nitrate (1:1, weight ratio) and dispersant PEG and PVA mixture (1:1, weight
Amount ratio) coating is made；
(2) using fin aluminium as structure carrier, it is clear by the way of pickling-alkali cleaning and washing to do surface to fin aluminium
It is clean, and fin aluminium is pre-processed by way of anodic oxidation, it is allowed to surface roughening；By institute by the way of air spraying
Coating is stated coated on fin aluminium, 2h is calcined at 400 DEG C after drying, obtaining catalyst, (coating layer thickness is 500 μm, and coating contains
There is the dispersant of 48 weight % hydrophobic silica, 48 weight % active component and 4 weight %, wherein, hydrophobicity
SiO2Particle diameter by laser particle analyzer test be 14.2nm, hydrophobic angle test is 121.1 °, specific surface area 615.3m2/g)；
Air purification method：
During use, above-mentioned adsoption catalysis catalyst is heated by the way of the auxiliary heating of PTC-ceramic piece, because
PTC-ceramic piece and above-mentioned catalyst are bonded (PTC-ceramic piece and catalyst heat transfer distances by this using heatproof heat conduction adhesive
0cm)；
Catalyst after bonding-auxiliary heating body system is put into air conditioner, in 30m3Degradation Formaldehyde is carried out in standard storehouse
(test relative humidity is 70%, and auxiliary heating face temperature is 160 DEG C, and air conditioner air outlet velocity is 4.88m/s, formaldehyde for experiment
Concentration is 2.0mg/m3), after measurement in 4 hours, the concentration of formaldehyde is 0.05mg/m3。
Embodiment 2
The preparation of adsoption catalysis catalyst：
(1) by Hexamethyldisiloxane, aluminum nitrate and ammonium chloroplatinate (mol ratio 50:And dispersant PEG, β-ring 1)
The mixture (1 of dextrin and hydroxymethyl cellulose:1:1, weight ratio) coating is made；
(2) using mullite ceramic honey comb as structure carrier, to mullite honeycomb by the way of pickling-alkali cleaning and washing
Ceramic surface cleans, and is calcined the coating after drying at 300 DEG C coated on mullite ceramic honey comb by the way of coating
5h, 150 DEG C of hydrogen reducing 1h, obtaining catalyst, (coating layer thickness is 967 μm, and coating contains 80 weight % hydrophobicity titanium dioxide
Silicon, 10 weight % active component and 10 weight % dispersant, the hydrophobicity SiO2Particle diameter surveyed by laser particle analyzer
It is 138.2 ° to try as 10nm, hydrophobic angle test, specific surface area 724.5m2/g)。
Air purification method：
During use, above-mentioned adsoption catalysis catalyst is added using the auxiliary mode of heating of heating wire-mica sheet
Heat, therefore, heating wire-mica sheet and above-mentioned catalyst are bonded into (heating wire-mica sheet and catalysis using heatproof heat conduction adhesive
Agent heat transfer distances 0cm)；
Catalyst after bonding-auxiliary heating body system is put into air conditioner, in 30m3Formaldehyde and smelly is carried out in standard storehouse
(test relative humidity is 50% to the degradation experiment of oxygen, and auxiliary heating face temperature is 180 DEG C, and air conditioner air outlet velocity is
4.88m/s, ozone and concentration of formaldehyde are respectively 8.0mg/m3And 2.0mg/m3), after measurement in 1 hour, ozone concentration is
0.06mg/m3, the concentration of formaldehyde is 0.04mg/m3。
Embodiment 3
The preparation of adsoption catalysis catalyst：
(1) by hydrophobicity SiO2(particle diameter is 12nm by laser particle analyzer test, and hydrophobic angle test is 130.4 °, compares table
Area is 649.8m2/ g), copper nitrate and ammonium chloropalladate (mol ratio 100:And dispersant PEG, beta-schardinger dextrin and hydroxyl first 1)
The mixture (1 of base cellulose:1:1, weight ratio) coating is made；
(2) using mullite ceramic honey comb as structure carrier, to mullite foam by the way of pickling-alkali cleaning and washing
Ceramic surface cleans.The coating is immersed on mullite ceramic honey comb by the way of dipping, in 400 DEG C of calcinings after drying
3h, 300 DEG C of hydrogen reducing 1h, obtaining catalyst, (thickness of coating is 197 μm, and coating contains 75 weight % hydrophobicity dioxy
SiClx, 20 weight % active component and 5 weight % dispersant, the hydrophobicity SiO2Particle diameter surveyed by laser particle analyzer
It is 130.4 ° to try as 12nm, hydrophobic angle test, specific surface area 649.8m2/g)；
Air purification method：
Above-mentioned adsoption catalysis catalyst is heated using the auxiliary mode of heating of heating wire-mica sheet, wherein electric heating
Silk-mica sheet and above-mentioned catalyst heat transfer distances are 10cm.
Above-mentioned catalyst-auxiliary heating body system is put into air conditioner, in 30m3Degradation of toluene experiment is carried out in standard storehouse
(test relative humidity is 60%, and auxiliary heating face temperature is 200 DEG C, and air conditioner air outlet velocity is 4.88m/s, toluene concentration
For 4.2mg/m3), after measurement in 1 hour, the concentration of toluene is 0.05mg/m3。
The adsorption catalyst of the present invention has good catalyticing purifying effect, energy it can be seen from embodiment 1-3 result
It is enough that catalytic purification is carried out under conditions of hot and humid.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (27)
1. a kind of adsorption catalyst, the catalyst includes：Ordered structure carrier and be distributed in ordered structure inner surface of the carrier and/or
The coating of outer surface；On the basis of the gross weight of the coating, the coating contains 50-95 weight % hydrophobic silica
With the 5-50 weight % catalytic active component that can aoxidize gaseous contaminant.
2. catalyst according to claim 1, wherein, methyl and/or fluothane are contained in the hydrophobic silica surface
Base, particle diameter 3-15nm, specific surface area 600-1000m2/g。
3. catalyst according to claim 2, wherein, the methyl and/or fluoroalkyl on the hydrophobic silica surface
Content with hydrophobic angle test it is quantification of 120 ° -145 °.
4. catalyst according to claim 2, wherein, the thickness of coating is 5-1000 μm.
5. according to the catalyst described in any one in claim 1-4, wherein, it is described to be urged what gaseous contaminant aoxidized
It is metal oxide and/or precious metal simple substance to change active component.
6. catalyst according to claim 5, wherein, it is described to be by the catalytic active component that gaseous contaminant aoxidizes
MnOx、Co3O4、FeOx、CuO、NiO、TiO2、Al2O3, one or more in Pt, Pd, Au, Ru, Rh and Ag.
7. catalyst according to claim 5, wherein, it is described to be by the catalytic active component that gaseous contaminant aoxidizes
The mixture of metal oxide and precious metal simple substance, wherein, the metal oxide is TiO2And/or Al2O3, the noble metal
Simple substance is the one or more in Pt, Pd, Au, Ru, Rh and Ag；Or the catalysis that can aoxidize gaseous contaminant is lived
Property component is metal oxide or precious metal simple substance, wherein, the metal oxide is MnOx、Co3O4、FeOx, in CuO and NiO
One or more, the precious metal simple substance be Pt, Pd, Au, Ru, Rh and Ag in one or more.
8. according to the catalyst described in any one in claim 1-4, wherein, the material of the ordered structure carrier is metal
One or more in material, ceramic material and PP materials, the ordered structure carrier are honeycomb structure carrier, foaming structure load
One or more in body, chip architecture carrier, silk structure carrier and grain structure carrier.
9. catalyst according to claim 8, wherein, the metal material is included in Cu, Ni, Fe, Al, Cr and its alloy
One or more, the ceramic material include cordierite, mullite and corundum in one or more.
10. catalyst according to claim 9, wherein, the metal material is Cu simple substance, Ni simple substance, Fe simple substance, Al mono-
One or more in matter, Fe-Cr-Al alloys, Fe-Cr-Ni alloys, Ni-Cr alloy and Ni-Fe alloys.
11. catalyst according to claim 9, wherein, the metal material is Al simple substance, Ni simple substance, Fe-Cr-Al conjunctions
One or more in the Ni-Cr alloy that gold and surface are aluminized.
12. catalyst according to claim 9, wherein, the ceramic material is mullite.
13. catalyst according to claim 8, wherein, the coating also contains dispersant and/or thickener.
14. catalyst according to claim 13, wherein, the dispersant and/or thickener are PEG, PVA, gelatin, melon
One or more in your bean gum, beta-schardinger dextrin and hydroxymethyl cellulose.
15. a kind of method for preparing catalyst described in any one in claim 1-14, wherein, this method includes：
(1) a kind of coating is prepared, the coating contains silica source and the catalytic activity group that can aoxidize gaseous contaminant
Divide source；
(2) coating is coated or impregnated with ordered structure carrier, calcined after drying；
Wherein, the temperature of the calcining causes silica source to be converted into hydrophobic silica, and higher than organic in coating
Thing ablation temperature.
16. according to the method for claim 15, wherein, the silica source is aerosol silica and/or can
The organic matter of silica is provided, the temperature of the calcining is 300-400 DEG C；The catalysis that gaseous contaminant can be aoxidized
Active component source is the material that can be changed into metal oxide and/or metal oxide containing precious metals at calcination temperatures.
17. according to the method for claim 16, wherein, the silica source is hydrophobic silica, aerosol two
One or more in silica, Hexamethyldisiloxane and tetraethyl orthosilicate.
18. the method according to claim 11, wherein, the catalytic active component source that gaseous contaminant can be aoxidized
For the one or more in manganese salt, cobalt salt, molysite, mantoquita, nickel salt, titanium salt, aluminium salt and precious metal salt.
19. application of the catalyst in the air of purification polluting objects containing in claim 1-14 described in any one.
20. application according to claim 19, wherein, the gaseous contaminant includes formaldehyde, acetaldehyde, H2S、NH3, ozone,
One or more in benzene homologues and CO.
21. application according to claim 20, wherein, the gaseous contaminant is benzene homologues.
22. a kind of air cleaning unit, it is characterised in that the air cleaning unit includes clean unit (1), and the purification is single
The adsorption catalyst of first (1) described in containing any one in claim 1-14.
23. air cleaning unit according to claim 22, wherein, the air cleaning unit includes：In air flow
The prefiltering net (2) and clean unit (1) being sequentially arranged on direction, wherein, the prefiltering net (2) is used to trap in air
Particulate matter, and the upstream side of the clean unit (1) is disposed with the blower fan (3) of guiding air flow, the clean unit (1)
Downstream is disposed with the auxiliary heating element (4) for aiding in clean unit (1) heating, and optional described device also includes：Add
Wet unit (5), the humidifying unit (5) are used for the air wetting to clean unit (1) purification.
24. a kind of air purification method, it is characterised in that this method includes：
(1) particulate matter in air to be clean is removed；
(2) in a heated condition, the air for removing particulate matter is contacted with adsorption catalyst；
(3) optionally, the air after being contacted with adsorption catalyst is humidified；Wherein, the adsorption catalyst will for right
Seek the adsorption catalyst described in any one in 1-14.
25. according to the method for claim 24, wherein, the relative humidity of air to be clean is 50-70%, step (2)
The temperature of middle contact is 150-250 DEG C.
26. application of the air purification method described in claim 24 or 25 in the household electrical appliance with air-cleaning function.
27. application according to claim 26, wherein, the household electrical appliance are air purifier, have purification of air work(
One or more in the air conditioner and dehumidifier of energy.
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| CN108906036B (en) * | 2018-07-12 | 2020-09-08 | 苏州大学 | Binuclear rhodium complex doped platinum/hollow mesoporous silica sphere composite material and preparation method and application thereof |
| CN109173565A (en) * | 2018-09-14 | 2019-01-11 | 宁波中傲环保科技有限公司 | A method of processing exhaust gas |
| CN109046327A (en) * | 2018-09-14 | 2018-12-21 | 宁波中傲环保科技有限公司 | A kind of adsorption catalyst |
| CN111036241B (en) * | 2018-10-12 | 2022-11-15 | 中国石油化工股份有限公司 | Catalyst with regular structure, preparation method and application thereof, and catalytic oxidation treatment method for ammonia-containing waste gas |
| CN110628274A (en) * | 2019-10-12 | 2019-12-31 | 谢海峰 | For removing H2CO and HCHO paint and preparation method thereof |
| CN110721680A (en) * | 2019-10-23 | 2020-01-24 | 中国科学院生态环境研究中心 | Catalyst for simultaneously catalyzing and oxidizing formaldehyde and CO, and preparation method and application thereof |
| CN114931952B (en) * | 2022-04-11 | 2023-11-10 | 华东理工大学 | Preparation method of internal heating type foam integral catalyst for hydrogen production by methane steam reforming |
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