CN110314531A - A kind of VOCs absorption-electrically heated catalytic coupling function component and preparation method thereof - Google Patents
A kind of VOCs absorption-electrically heated catalytic coupling function component and preparation method thereof Download PDFInfo
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- CN110314531A CN110314531A CN201810294237.3A CN201810294237A CN110314531A CN 110314531 A CN110314531 A CN 110314531A CN 201810294237 A CN201810294237 A CN 201810294237A CN 110314531 A CN110314531 A CN 110314531A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1023—Palladium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1025—Rhodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/104—Silver
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/106—Gold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/209—Other metals
- B01D2255/2092—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/30—Silica
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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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
Abstract
The present invention relates to a kind of VOCs absorption-electrically heated catalytic coupling function components and preparation method thereof, and VOCs thermocatalyst is supported on the PTC resistor by the component using PTC resistor as skeleton.By preparing base coating on PTC resistor surface, then the base coating surface that VOCs thermocatalyst is supported on PTC resistor is obtained.The present invention is by the way that VOCs thermocatalyst to be supported on heated at constant temperature PTC resistor, it realizes the direct thermocatalytic in 200 to 300 DEG C of temperature ranges and decomposes VOCs, compared with conventional two-piece Resistant heating air catalytic decomposes VOCs, greatly reduce energy consumption, improve energy utilization rate, safety is improved simultaneously, it is with good economic efficiency.Preparation process of the present invention is simple, and obtained workpiece module is small and exquisite, and the thermal efficiency is high, can be applied in the devices such as Household Air Purifier, fresh air purifier, smoke exhaust ventilator, has a good application prospect.
Description
Technical field
The present invention relates to organic matter field of purification, and in particular to a kind of VOCs absorption-electrically heated catalytic coupling function component and
Preparation method.
Background technique
VOCs (volatile organic matter) architectural decorative and fitting materials can release volatile organic matter (VOCs), deenergized period
Up to the several years.The World Health Organization (WHO), may studies have shown that be chronically exposed to containing in formaldehyde, benzene homologues high risk VOCs
It will lead to cancer and leukaemia.There are many VOCs type in family's air, and there are the release of decoration material furniture, kitchen oil in source
Cigarette etc..
Currently, the purification of VOCs mainly uses active carbon adsorption in room air, there are adsorbable multiple gases, price
Cheaply, advantage easy to use, but disadvantage causes secondary pollution it is also obvious that the pernicious gas of absorption is easy desorption, and living
Property charcoal have a high-hydroscopicity, the easy moisture absorption blocking of internal capillary is practical to purify the service life and there was only some months, and such as rainy season, there was dampness in the air, the longevity
Life only has several weeks, and the release of home decoration material VOCs is up to even more than ten years several years, and active carbon obviously cannot be met the requirements.
VOCs can be resolved into carbon dioxide and water by catalysis method, it is considered to be desired cleansing VOCs method.It is common to there is light to urge
Change method and heat catalytic oxidation method, but photocatalytic method decomposition rate is slow and by-product is more, it is difficult to effectively promoted.
VOCs can be effectively catalytically decomposed using industrial thermocatalytic combustion technology, by the effort of scientist, catalyst heat
It decomposes VOCs temperature to have already decreased between 200 DEG C to 300 DEG C, but heating source generally uses surface temperature in the prior art
1000 DEG C or more of resistance wire passes through Resistant heating surface using blower blows air, and high temperature air passes through catalyst mould
Block decomposes VOCs.This kind of unit temp is too high, and the thermal efficiency is too low, can not apply in the domestic air that plastic member is main structure body
In clarifier.
Summary of the invention
In view of problems of the prior art, the present invention provides a kind of VOCs absorption-electrically heated catalytic coupling function groups
Part and preparation method thereof has the characteristics that constant temperature in a certain fixed temperature using heated at constant temperature PTC resistor calandria, as
Skeleton, surface coat catalyst, and electrified regulation PTC skeleton realizes that direct thermocatalytic decomposes in 200 to 300 DEG C of temperature ranges
The advantages of VOCs improves energy utilization rate, greatly reduces energy consumption, be provided simultaneously with energy-saving safe has good economic effect
Benefit and application prospect.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the component is the present invention provides a kind of VOCs absorption-electrically heated catalytic coupling function component with PTC
Resistance is skeleton, and VOCs thermocatalyst is supported on the PTC resistor.
According to the present invention, the constant temperature section of the PTC resistor is 100-400 DEG C, preferably 200-300 DEG C；Such as it can be with
It is the specific point value between 100 DEG C, 150 DEG C, 200 DEG C, 250 DEG C, 300 DEG C, 350 DEG C or 400 DEG C and above-mentioned numerical value, is limited to
Length and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the PTC resistor is tabular, circular tube shaped or porous honeycomb.
According to the present invention, the VOCs thermocatalyst is noble metal catalyst.
According to the present invention, the noble metal catalyst includes active component and carrier.
According to the present invention, the active component be platinum, palladium, rhodium, gold or silver in any one or at least two combination；
Such as it can be any one in platinum, palladium, rhodium, gold or silver, typical but non-limiting combination are as follows: platinum and palladium, rhodium and gold, platinum
And silver, Jin Heyin, platinum, palladium and gold, platinum, palladium, rhodium and gold etc., but it is non-be only limitted to this, as space is limited and for concise consideration, this
Invention no longer exclusive list.
According to the present invention, the carrier is any one in aluminium oxide, titanium oxide or silicon oxide powder.
Second aspect, the present invention provide a kind of VOCs absorption-electrically heated catalytic coupling function component as described in relation to the first aspect
Preparation method, the described method comprises the following steps:
(1) base coating is prepared on PTC resistor surface；
(2) VOCs thermocatalyst is supported on to the base coating surface for the PTC resistor that step (1) obtains.
According to the present invention, the concrete operations of step (1) are as follows: will support powder, water and carrier colloidal sol mix after be coated to through
The PTC resistor surface of ultrasonic cleaning is crossed, is calcined after dry, obtains base coating on PTC resistor surface.
Carrier in above-mentioned support powder and carrier colloidal sol is corresponding carrier in noble metal catalyst, such as when described expensive
When metallic catalyst is using aluminium oxide as carrier, above-mentioned support powder is alumina powder, and carrier colloidal sol is Aluminum sol；When described expensive
When metallic catalyst is using silica as carrier, above-mentioned support powder is silicon oxide powder, and carrier colloidal sol is silica solution；Similar,
When the noble metal catalyst is using titanium oxide as carrier, above-mentioned support powder is titanium dioxide powder, and carrier colloidal sol is titanium colloidal sol.
The present invention is not specifically limited the additional amount of water in above-mentioned mixed process, and water is added and mainly plays diluting effect,
Additive amount should be selected and be adjusted according to the concrete condition in actual mechanical process.
Before the present invention coats VOCs thermocatalyst on PTC resistor surface, base coating, base first are prepared on PTC resistor surface
Priming coat can increase the binding force of PTC resistor and VOCs thermocatalyst, so that the two is firmly combined, avoid it in Isothermal Structural Decomposition In Certain
It falls off during VOCs.Due to containing noble metal, higher cost, for the purpose for reducing cost, base coating in catalyst
It is mixed with by support powder and carrier colloidal sol, and catalyst (noble metal) is not added.
According to the present invention, the mass ratio of the support powder and carrier colloidal sol is (1-2): 1, such as can be 1:1,1.1:
1, specific between 1.2:1,1.3:1,1.4:1,1.5:1,1.6:1,1.7:1,1.8:1,1.9:1 or 2:1 and above-mentioned numerical value
Point value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the temperature of the calcining is 400-800 DEG C, preferably 600 DEG C；Such as it can be 400 DEG C, 450
DEG C, 500 DEG C, 550 DEG C, 600 DEG C, 650 DEG C, 700 DEG C, 750 DEG C or the specific point value between 800 DEG C and above-mentioned numerical value, be limited to
Length and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the time of the calcining is 0.5-2h, preferably 1h；Such as can be 0.5h, 1h, 1.5h or
Specific point value between 2h and above-mentioned numerical value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the concrete operations of step (2) are as follows: coated after mixing VOCs thermocatalyst, water and carrier colloidal sol
The base coating surface of the PTC resistor obtained to step (1) is calcined after dry, is obtained catalyst on PTC resistor surface and is applied
Layer.
Carrier in above-mentioned carrier colloidal sol is corresponding carrier in noble metal catalyst, such as when the noble metal catalyst
When using aluminium oxide as carrier, above-mentioned carrier colloidal sol is Aluminum sol；It is above-mentioned when the noble metal catalyst is using silica as carrier
Carrier colloidal sol is silica solution；When the noble metal catalyst is using titanium oxide as carrier, above-mentioned carrier colloidal sol is titanium colloidal sol.
The present invention is not specifically limited the additional amount of water in above-mentioned mixed process, and water is added and mainly plays diluting effect,
Additive amount should be selected and be adjusted according to the concrete condition in actual mechanical process.
According to the present invention, the mass ratio of the VOCs thermocatalyst and carrier colloidal sol is (3-10): 1；Such as it can be 3:
1, the specific point value between 4:1,5:1,6:1,7:1,8:1,9:1 or 10:1 and above-mentioned numerical value, as space is limited and for simplicity
The considerations of, the present invention no longer exclusive list.
According to the present invention, the temperature of the calcining is 400-800 DEG C, preferably 600 DEG C；Such as it can be 400 DEG C, 450
DEG C, 500 DEG C, 550 DEG C, 600 DEG C, 650 DEG C, 700 DEG C, 750 DEG C or the specific point value between 800 DEG C and above-mentioned numerical value, be limited to
Length and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the time of the calcining is 1-3h, preferably 2h；Such as can be 1h, 1.5h, 2h, 2.5h or
Specific point value between 3h and above-mentioned numerical value, as space is limited and for concise consideration, the present invention no longer exclusive list.
VOCs absorption of the present invention-electrically heated catalytic coupling function component preparation method as a preferred technical solution,
The following steps are included:
(1) support powder, water and carrier colloidal sol are mixed, gained mixed liquor is coated to the electricity of the PTC by ultrasonic cleaning
Surface is hindered, 0.5-2h is calcined at 400-800 DEG C after dry, obtains base coating on PTC resistor surface；The support powder and
The mass ratio of carrier colloidal sol is (1-2): 1；
(2) VOCs thermocatalyst, water and carrier colloidal sol are mixed, gained mixed liquor is coated to the PTC that step (1) obtains
The base coating surface of resistance calcines 1-3h at 400-800 DEG C after dry, obtains catalyst coat on PTC resistor surface；Institute
The mass ratio for stating VOCs thermocatalyst and carrier colloidal sol is (3-10): 1.
Compared with prior art, the present invention is at least had the advantages that
(1) present invention is using PTC resistor as skeleton, real by the way that VOCs thermocatalyst to be supported on heated at constant temperature PTC resistor
The direct thermocatalytic in 200 to 300 DEG C of temperature ranges is showed and has decomposed VOCs, with conventional two-piece Resistant heating air catalytic point
Solution (1000 DEG C of surface temperature or more) is compared, and is greatly reduced energy consumption, is improved energy utilization rate, while improving safety,
It is with good economic efficiency.
(2) preparation process of the present invention is simple, and obtained workpiece module is small and exquisite, and the thermal efficiency is high, and it is net to can be applied to domestic air
Change in the devices such as device, household smoke exhaust ventilator, has a good application prospect.
Detailed description of the invention
Fig. 1 is the pictorial diagram for the PTC resistor skeleton that specific embodiment of the invention part uses；
Fig. 2 is the planar structure schematic diagram for the PTC resistor skeleton that specific embodiment of the invention part uses；
Fig. 3 is VOCs absorption-electrically heated catalytic coupling function component pictorial diagram that the embodiment of the present invention 1 obtains；
Fig. 4 is a cellular unit in VOCs absorption-electrically heated catalytic coupling function component that the embodiment of the present invention 1 obtains
Structural schematic diagram, wherein 1- honeycomb PTC resistor, 2- base coating, 3- catalyst coat；
Fig. 5 is VOCs absorption-electrically heated catalytic coupling function component catalyzed conversion ethyl acetate that the embodiment of the present invention 1 obtains
Effect diagram；
Fig. 6 is the air cleaning that VOCs absorption-electrically heated catalytic coupling function component that the embodiment of the present invention 1 obtains is combined into
Clean-up effect schematic diagram of the device to ortho-xylene.
The present invention is described in more detail below.But following examples is only simple example of the invention, not generation
Table or limitation the scope of the present invention, protection scope of the present invention are subject to claims.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, of the invention is typical but non-limiting
Embodiment is as follows:
The heated at constant temperature PTC resistor skeleton selected in the specific embodiment of the invention is the cavernous cylindrical body of honeycomb, such as
Shown in Fig. 1, outer diameter 41mm is highly 10mm, volume 13.2mL.
Embodiment 1
(1) alumina powder, water and Aluminum sol are uniformly mixed and obtain mixed liquor, the quality of alumina powder and Aluminum sol
Than gained mixed liquor being coated to the PTC resistor surface by ultrasonic cleaning, then 140 DEG C of dryings are forged at 600 DEG C for 2:1
1h is burnt, obtains base coating on PTC resistor surface；
(2) by Pd/AL2O3Catalyst (Pd 1wt%), water and Aluminum sol are uniformly mixed and obtain mixed liquor, VOCs thermocatalytic
The mass ratio of agent and Aluminum sol is 5:1, and gained mixed liquor is uniformly coated to the base coating for the PTC resistor that step (1) obtains
Surface, 140 DEG C of dryings, then calcines 2h at 600 DEG C, obtains catalyst coat, i.e. VOCs absorption-electricity on PTC resistor surface
Thermocatalytic coupling function component, the structure of gained component are as shown in Figure 3 and Figure 4.
Embodiment 2
(1) alumina powder, water and Aluminum sol are uniformly mixed and obtain mixed liquor, the quality of alumina powder and Aluminum sol
Than gained mixed liquor being coated to the PTC resistor surface by ultrasonic cleaning, then 140 DEG C of dryings are forged at 500 DEG C for 1:1
1.5h is burnt, obtains base coating on PTC resistor surface；
(2) by Pt/AL2O3Catalyst (Pt 1wt%), water and Aluminum sol are uniformly mixed and obtain mixed liquor, VOCs thermocatalytic
The mass ratio of agent and Aluminum sol is 4:1, and gained mixed liquor is uniformly coated to the base coating for the PTC resistor that step (1) obtains
Surface, 140 DEG C of dryings, then calcines 1.5h at 650 DEG C, obtains catalyst coat, i.e. VOCs absorption-on PTC resistor surface
Electrically heated catalytic coupling function component.
Embodiment 3
(1) silicon oxide powder, water and silica solution are uniformly mixed and obtain mixed liquor, the quality of silicon oxide powder and silica solution
Than gained mixed liquor being coated to the PTC resistor surface by ultrasonic cleaning, then 140 DEG C of dryings are forged at 800 DEG C for 3:2
0.5h is burnt, obtains base coating on PTC resistor surface；
(2) by Rh/SiO2Catalyst (Rh 1wt%), water and silica solution are uniformly mixed and obtain mixed liquor, VOCs thermocatalytic
The mass ratio of agent and silica solution is 8:1, and gained mixed liquor is uniformly coated to the base coating for the PTC resistor that step (1) obtains
Surface, 140 DEG C of dryings, then calcines 2.5h at 500 DEG C, obtains catalyst coat, i.e. VOCs absorption-on PTC resistor surface
Electrically heated catalytic coupling function component.
Performance test:
(1) VOCs absorption-electrically heated catalytic coupling function component catalytic performance is tested
VOCs absorption-electrically heated catalytic coupling function component that embodiment 1 obtains is placed in glass pipe reactor, point temperature
Test surfaces temperature is counted, catalyzed gas is ethyl acetate, and initial concentration 1000ppm, gas flow rate 300mL/min pass through
Changing input voltage, regulatory function assembly surface temperature tests the conversion ratio of ethyl acetate under different temperatures, as shown in figure 5,
The conversion ratio of ethyl acetate reaches 90% or more at 205 DEG C.
(2) in 3m3In Laboratory Module, clean-up effect of the test air cleaning unit to ortho-xylene
The VOCs absorption for taking 16 embodiments 2 to obtain-electrically heated catalytic coupling function component, total volume 211.2mL divide 4
Layer, 4 pieces every layer are fabricated to VOCs absorption-electrically heated catalytic coupling function component, select adjustable air volume blower and VOCs absorption-electric heating
Catalysis coupling function component is assembled into a set of air cleaning unit, is powered to component alternating current 220V, controls electric current 0.12A, surface
Temperature is 290 DEG C, adjusts air quantity to air speed 50000h-1, according to GB/T 18801 " air purifier " national standard, in 3m3It is close
Test device in cabin is closed to the clean-up effect of ortho-xylene, as shown in fig. 6, with the extension of processing time, ortho-xylene it is dense
Degree is gradually reduced, and 0.2mg/m is down to after 6h3Below.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
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 also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of VOCs absorption-electrically heated catalytic coupling function component, which is characterized in that the component, will using PTC resistor as skeleton
VOCs thermocatalyst is supported on the PTC resistor.
2. component as described in claim 1, which is characterized in that the constant temperature section of the PTC resistor is 100-400 DEG C, preferably
It is 200-300 DEG C；
Preferably, the PTC resistor is tabular, circular tube shaped or porous honeycomb.
3. component as claimed in claim 1 or 2, which is characterized in that the VOCs thermocatalyst is noble metal catalyst.
4. the method according to claim 1, which is characterized in that the noble metal catalyst include active component and
Carrier；
Preferably, the active component be platinum, palladium, rhodium, gold or silver in any one or at least two combination；
Preferably, the carrier is any one in aluminium oxide, titanium oxide or silicon oxide powder.
5. VOCs absorption according to any one of claims 1-4-electrically heated catalytic coupling function component preparation method, feature
It is, the described method comprises the following steps:
(1) base coating is prepared on PTC resistor surface；
(2) VOCs thermocatalyst is supported on to the base coating surface for the PTC resistor that step (1) obtains.
6. method as claimed in claim 5, which is characterized in that the concrete operations of step (1) are as follows: by support powder, water and load
It is coated to the PTC resistor surface by ultrasonic cleaning after the mixing of body colloidal sol, is calcined after dry, is obtained on PTC resistor surface
Base coating.
7. method as claimed in claim 6, which is characterized in that the mass ratio of the support powder and carrier colloidal sol is (1-2):
1；
Preferably, the temperature of the calcining is 400-800 DEG C, preferably 600 DEG C；
Preferably, the time of the calcining is 0.5-2h, preferably 1h.
8. such as the described in any item methods of claim 5-7, which is characterized in that the concrete operations of step (2) are as follows: urge VOCs heat
It is coated to the base coating surface for the PTC resistor that step (1) obtains after agent, water and the mixing of carrier colloidal sol, is forged after dry
It burns, obtains catalyst coat on PTC resistor surface.
9. method according to claim 8, which is characterized in that the mass ratio of the VOCs thermocatalyst and carrier colloidal sol is
(3-10):1；
Preferably, the temperature of the calcining is 400-800 DEG C, preferably 600 DEG C；
Preferably, the time of the calcining is 1-3h, preferably 2h.
10. such as the described in any item methods of claim 5-9, which is characterized in that the described method comprises the following steps:
(1) support powder, water and carrier colloidal sol are mixed, gained mixed liquor is coated to the PTC resistor table by ultrasonic cleaning
Face calcines 0.5-2h at 400-800 DEG C after dry, obtains base coating on PTC resistor surface；The support powder and carrier
The mass ratio of colloidal sol is (1-2): 1；
(2) VOCs thermocatalyst, water and carrier colloidal sol are mixed, gained mixed liquor is coated to the PTC resistor that step (1) obtains
Base coating surface, calcine 1-3h at 400-800 DEG C after dry, obtain catalyst coat on PTC resistor surface；It is described
The mass ratio of VOCs thermocatalyst and carrier colloidal sol is (3-10): 1.
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| CN201810294237.3A CN110314531A (en) | 2018-03-30 | 2018-03-30 | A kind of VOCs absorption-electrically heated catalytic coupling function component and preparation method thereof |
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| CN201810294237.3A CN110314531A (en) | 2018-03-30 | 2018-03-30 | A kind of VOCs absorption-electrically heated catalytic coupling function component and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112569778A (en) * | 2020-09-30 | 2021-03-30 | 天津大学 | Formaldehyde removal method by using PTC (positive temperature coefficient) ceramic heater and filter element |
| CN114846226A (en) * | 2020-01-07 | 2022-08-02 | 日本碍子株式会社 | Electric heating type carrier and exhaust gas purification device |
| CN115253587A (en) * | 2022-06-02 | 2022-11-01 | 昆明理工大学 | Method and device for purifying organic waste gas by combining electro-catalysis and biochemistry |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114846226A (en) * | 2020-01-07 | 2022-08-02 | 日本碍子株式会社 | Electric heating type carrier and exhaust gas purification device |
| CN114846226B (en) * | 2020-01-07 | 2023-08-08 | 日本碍子株式会社 | Electric heating type carrier and exhaust gas purifying device |
| CN112569778A (en) * | 2020-09-30 | 2021-03-30 | 天津大学 | Formaldehyde removal method by using PTC (positive temperature coefficient) ceramic heater and filter element |
| CN115253587A (en) * | 2022-06-02 | 2022-11-01 | 昆明理工大学 | Method and device for purifying organic waste gas by combining electro-catalysis and biochemistry |
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