CN108236954A - A kind of method of low temperature removing formaldehyde - Google Patents
A kind of method of low temperature removing formaldehyde Download PDFInfo
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- CN108236954A CN108236954A CN201810140663.1A CN201810140663A CN108236954A CN 108236954 A CN108236954 A CN 108236954A CN 201810140663 A CN201810140663 A CN 201810140663A CN 108236954 A CN108236954 A CN 108236954A
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- 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
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/656—Manganese, technetium or rhenium
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Abstract
The present invention provides a kind of methods of low temperature removing formaldehyde, include the following steps：Using catalyst oxidation of formaldehyde；The catalyst is the manganese dioxide for loading potassium and platinum；The temperature of the catalysis oxidation is 10~25 DEG C.Using above-mentioned catalyst, efficiently catalyzing and oxidizing removes formaldehyde to the present invention at low temperature, the catalyst has excellent low-temperature catalytic oxidation removing formaldehyde catalytic performance, removal efficiency is high, it is pollution-free to remove product, it is and with good stability, the contradiction between catalyst cost and performance is efficiently solved, can be widely applied to prepare various air purifier removal formaldehyde.
Description
Technical field
The present invention relates to removing formaldehyde catalyst technical field more particularly to a kind of methods of low temperature removing formaldehyde.
Background technology
Formaldehyde (HCHO) is a kind of important organic pollution in air.The source of formaldehyde is than wide in ambient air,
Wherein a source is mainly industry and the discharge of vehicle exhaust, the imperfect combustion of biomass and fossil fuel, construction material
Release and certain natural processes generation；Secondary source is air VOCs (volatile organic matter) such as methane, isoprene
Deng photochemical oxidation, almost the photochemical oxidation of each VOCs all comprising generation formaldehyde process.Formaldehyde be also it is indoor most
One of serious pollutant has higher toxicity, second is on China's toxic chemical priority acccess control list, and
Oneself by the World Health Organization through being determined as carcinogenic and causing deformed material.
Since Form aldehyde release is slow in finishing material, 3-5 still has the Form aldehyde release of low concentration after often fitting up.And people
The space containing formaldehyde is chronically at, can cause to shed tears, bronchitis, pharyngitis, pneumonia even lung cancer.China's national quality supervision inspection
Epidemic disease general bureau and Minstry of Housing and Urban-Rural Development of People Republic of China (MOHURD) were in joint publication in 2001《Code for indoor environmental pollution control of civil building engineering》Middle regulation,
The I such as private residence, school, hospital classes house requires content of formaldehyde in 0.08mg/m3Below；The II class house such as shop, hotel requires first
Aldehyde is in 0.12mg/m3Below.《Indoor Air Quality standards》(GB/T18883-2002) it is provided in, formaldehyde in indoor air
Sanitary standard (maximum permissible concentration) be 0.10mg/m3。
At present, there are many ways to administering formaldehyde pollution, such as ventilation technology, room temperature adsorption technology, anion skill
Art, non-thermal plasma trap, green plants absorption, formaldehyde scavenger and catalytic oxidation technologies etc., but mostly there are some shortcomings.
Green plants is limited by time and concentration；Adsorption technology is limited by adsorption capacity and regeneration with adsorbent inactivation；Bear from
Sub- technology is more demanding to transmitting equipment, and secondary fly-up easily occurs；Lower temperature plasma technology then there are power consumption it is big, two
The problems such as secondary pollution.In addition, use at present in the market elimination formaldehyde product, mostly there are product quality it is not high, eliminate efficiency
Not high, the shortcomings of secondary pollution is more serious, persistence is poor.
Formaldehyde in catalytic oxidation degradation air is a kind of long-acting method.United States Patent (USP) US5585083 has invented one
Kind Pt/SnO2The method that catalyst removes formaldehyde in air, catalyst is in not additional energy input and -5-25 DEG C of conditions
Under, it is oxidant by the degradable Cheng Shui of formaldehyde and carbon dioxide with the oxygen in air.But in catalyst, the content of Pt is up to
12%, lead to the expensive of catalyst, this catalyst can be only applied to the special occasions such as some military projects or aerospace.
Therefore, by the improvement to active component and preparation process, while high catalytic activity is pursued, catalyst is reduced
Cost simplifies preparation process, and it will be main direction of studying from now on to obtain efficient stable and catalyst cheap and easy to get.
Invention content
In view of this, the technical problem to be solved in the present invention is to provide a kind of method of low temperature removing formaldehyde, cost compared with
It is low, and removal efficiency is higher.
For solution more than technical problem, the present invention provides a kind of methods of low temperature removing formaldehyde, include the following steps：
Using catalyst oxidation of formaldehyde；
The catalyst is the manganese dioxide for loading potassium and platinum；
The temperature of the catalysis oxidation is -10~25 DEG C.
Preferably, the manganese dioxide is 3D- manganese dioxide.
Preferably, the specific surface area of the manganese dioxide is 40~110m2/ g, aperture are 1.5~5nm；The grain of the platinum
Diameter is 1~3nm.
Preferably, in the catalyst, platinum content is 0.1wt%~1wt%, and potassium content is 1wt%~13wt%.
Preferably, the catalyst is prepared in accordance with the following methods：
Manganese dioxide is impregnated in potassium resource compound, platinum source compound, NaBH4In the mixed solution of sodium citrate, so
After dry.
Preferably, the time of the dipping for 1~for 24 hours；The temperature of the drying is 20~80 DEG C, the time of the drying
For 1~for 24 hours；The temperature of the calcining is 300~650 DEG C, and the time of the calcining is 1~10h.
Preferably, the potassium resource compound is the water soluble compound containing potassium atom；The platinum source compound is former for platiniferous
The water soluble compound of son.
Preferably, the atmosphere of the catalysis oxidation is 15~30ppm HCHO+80%N2+ 20%O2, reaction gas flow speed 40
~60mL/min, humidity level RH are 30%~80%, and catalyst space velocities are 40000~60000h-1。
Compared with prior art, the present invention provides a kind of method of low temperature removing formaldehyde, include the following steps：Using urging
Agent catalysis oxidation formaldehyde；The catalyst is the manganese dioxide for loading potassium and platinum；The temperature of the catalysis oxidation is -10~25
℃.Using above-mentioned catalyst, there is the present invention excellent low temperature to urge for efficiently catalyzing and oxidizing removal formaldehyde, the catalyst at low temperature
Change oxidation removal formaldehyde catalytic performance, removal efficiency is high, and removing product is pollution-free and with good stability, effectively solves
The contradiction determined between catalyst cost and performance can be widely applied to prepare various air purifier removal formaldehyde.
Description of the drawings
Fig. 1 is K-Pt/MnO in the embodiment of the present invention 12The TEM figures of catalyst；
Fig. 2 is K-Pt/MnO in the embodiment of the present invention 12With MnO in comparative example 12, K/MnO in comparative example 22, in comparative example 3
Pt/MnO2The catalysis formaldehyde performance test figure of catalyst；
Fig. 3 is K-Pt/MnO in the embodiment of the present invention 72The catalysis formaldehyde stability test chart of catalyst.
Specific embodiment
The present invention provides a kind of methods of low temperature removing formaldehyde, include the following steps：
Using catalyst oxidation of formaldehyde；
The catalyst is the manganese dioxide for loading potassium and platinum；
The temperature of the catalysis oxidation is -10~25 DEG C.
The present invention provides a kind of methods using catalyst, at low temperature efficiently catalyzing and oxidizing removal formaldehyde.
The present invention is to the source of the formaldehyde and is not particularly limited, and can be the formaldehyde in all air.
The method is specially using catalyst, in reaction atmosphere, formaldehyde is converted and is removed.The removal temperature is preferred
It it is -10~25 DEG C, in some embodiments of the invention, the removal temperature is 0~5 DEG C.
Wherein, the catalyst is support type Mn oxide, specially loads the manganese dioxide of potassium and platinum.
In the catalyst, the content of platinum is preferably 0.1wt%~1wt%, more preferably 0.5wt%~1wt%；Potassium
Content is preferably 1wt%~13wt%, more preferably 6wt%~13wt%.
The manganese dioxide is preferably 3D- manganese dioxide.
The specific surface area of the manganese dioxide is preferably 40~110m2/ g, aperture are preferably 1.5~5nm.
The grain size of the platinum loaded is preferably 1~3nm.
The present invention is substantially increased using the synergistic effect of above-mentioned active component potassium/platinum and carrier manganese dioxide for first
The removal effect of aldehyde.
In the present invention, the catalyst is prepared in accordance with the following methods：
Manganese dioxide is impregnated in potassium resource compound, platinum source compound, NaBH4In the mixed solution of sodium citrate, so
After dry.
The potassium resource compound can be the water soluble compound containing potassium atom, preferably potassium carbonate；Platinum source chemical combination
Object can be the water soluble compound of platiniferous atom, preferably H2PtCl6。
The present invention is for the potassium resource compound, platinum source compound, NaBH4There is no special limit with the source of sodium citrate
It is fixed, it is commercially available.
The present invention for the dipping concrete operations without limit, it is well known to those skilled in the art.It is described
The time of dipping is preferably 1-24h；More preferably 5-15h；Most preferably 5-6h.
The present invention for the drying concrete mode without limit, it is well known to those skilled in the art.It is described
Dry temperature is preferably 20-80 DEG C；More preferably 55-65 DEG C；The time of the drying is preferably 1-24h；More preferably 8-
20h；Most preferably 10-15h.
The present invention is to the source of the 3D- manganese dioxide and is not particularly limited, and can be general commercially available or according to ability
Prepared by method known to field technique personnel, it is preferred to use prepared by following method：By hard template method by structure directing agent, silicon source,
One or more of manganese source mixes in a solvent, and dry, calcining obtains.
The present invention is stirred, then using one or more of structure directing agent, silicon source, manganese source are mixed in a solvent
Dry, calcining obtains.
The present invention is for structure directing agent, preferably Pluronic P123 (pluronic-polypropylene glycol and ethylene oxide
Addition polymers).
The present invention is for silicon source without limiting, and the compound well known to those skilled in the art that can provide silicon atom is i.e.
It can；It is preferred that can be ethyl orthosilicate.
The present invention is for manganese source without limiting, and the compound well known to those skilled in the art that can provide manganese atom is i.e.
It can；It is preferred that can be Mn (NO3)2·4H2O；
In the present invention, the solvent is preferably hydrochloric acid and n-butanol.The present invention comes for the hydrochloric acid and n-butanol
Source is well known to those skilled in the art without limiting.
The present invention does not limit the concrete mode of the stirring, and the time of the stirring is preferably 1-24h；More preferably
4-7h；Most preferably 5-6h.The temperature of the stirring is preferably room temperature.The mixing speed is preferably 200-1000rpm；It is more excellent
It is selected as 500-600rpm.
The present invention does not limit the concrete mode of the drying, drying mode well known to those skilled in the art.
The temperature of drying of the present invention is preferably 80-150 DEG C；More preferably 95-110 DEG C.
The present invention does not limit the concrete mode of the calcining, calcining manners well known to those skilled in the art.
Preferred 350-550 DEG C of the temperature of the calcining；More preferably 400-450 DEG C.
The removal efficiency of the manganese dioxide-catalyst PARA FORMALDEHYDE PRILLS(91,95) of load K/Pt that the present invention is prepared using above-mentioned specific method
Height, and product is pollution-free, while the stability of the manganese dioxide-catalyst of the load K/Pt of the present invention is good, continues in reaction
Still catalytic performance is good after 70h.
During above-mentioned catalysis oxidation formaldehyde, the atmosphere of the catalysis oxidation is preferably 15~30ppmHCHO+80%N2
+ 20%O2, more preferably 20~25ppmHCHO+80%N2+ 20%O2；Reaction gas flow speed is preferably 40~60mL/min, more excellent
It is selected as 45~55mL/min；Humidity level RH is preferably 30%~80%, and more preferably 45%~55%.
In the present invention, the catalyst quality is preferably 50~70mg；More preferably 55~65mg；The catalyst is empty
Speed is preferably 40000~60000h-1；More preferably 45000~55000h-1。
The pressure of the catalysis oxidation is preferably atmospheric pressure.
The present invention for the reaction vessel without limit, it is well known to those skilled in the art；It can be quartz
Pipe.
In reaction process, product is obtained, formaldehyde surplus is measured into gas phase.
Formaldehyde in air is completely oxidized to water and carbon dioxide by catalyst provided by the invention, suitable for closing, half
The removal of the formaldehyde pollutants of enclosure space.Catalyst, which does not need to additional light or electric energy, to convert the formaldehyde in air
For harmless carbon dioxide and water, advantage is that processing formaldehyde is efficient, and without secondary pollution and there is no adsorption saturations etc.
Problem, the formaldehyde for particularly handling low concentration are highly effective.
In order to further illustrate the present invention, with reference to embodiment to low temperature provided by the invention removing formaldehyde method into
Row detailed description.
Embodiment 1
A kind of K-Pt/MnO2Low-temperature catalytic oxidation removes the catalyst of formaldehyde, and carrier is specific surface area 86m2/ g, aperture
The three-dimensional manganese dioxide of 3.8nm, active component K/Pt, by mass percentage, always negative discretion is K/Pt metals in catalyst
13%, wherein Pt are 1%, K 12%, and surplus is carrier MnO2；The aperture averaging of catalyst is 3nm.
The K-Pt/MnO2The preparation method step of catalyst of low-temperature catalytic oxidation removing formaldehyde is：
(1) by Pluronic P123 (EO20PO70EO20) (addition polymers of pluronic-polypropylene glycol and ethylene oxide)
(1.2 mMs, 7.2 grams), (94.5 mMs, the 7 grams) mixing of hydrochloric acid (37%, 13.9 grams) and n-butanol add in one 500 milli
In the round-bottomed flask risen, 1h is stirred, building-up process temperature is maintained at 38 DEG C；
(2) ethyl orthosilicate (7 grams) is added in, continues agitating solution 24 hours, solution is transferred to 100 DEG C of polytetrafluoroethylene (PTFE)
24 hours in inner liner stainless steel reaction kettle；
(3) after hydro-thermal process, mixed liquor is washed with deionized, and filtering is several times.Sample is dry at 100 DEG C, at 550 DEG C
Lower calcining 5h, completely eliminates template.Obtain three-dimensional cubic KIT-6 (Ia3d) mesoporous material of white；
(4) 4 grams of KIT-6 molecular sieves add in Mn (NO3)2·4H2In the ethanol solution (0.91 mol/L, 40 milliliters) of O.
Sample is evaporated to drying in 80 DEG C.200 DEG C of calcined product 6h repeat above-mentioned casting evaporation step.Finally, material is forged in 400 DEG C
It burns 6 hours.KIT-6 hard templates are removed with the NaOH solution of 2mol/L.Centrifuge removal sodium metasilicate, remaining solid sample in
100 DEG C of dryings, 400 DEG C of calcinings obtain 3D-MnO2Sample；
(5) 3D-MnO of the above-mentioned preparations of 0.3g is added in the deionized water of 10mL2, then it is added with stirring centainly in magnetic
The H of amount2PtCl6Solution to reach the nominal weight of Pt=1wt%, adds in 0.22g K immediately after2CO3；
(6) by NaBH45 milliliters of solution of (0.572M), NaOH (0.25M) and sodium citrate (1mM) mixed solution are rapid
It adds in above-mentioned suspension, stirs 300min；
(7) centrifuged with deionized water, sample 60 DEG C it is dried overnight to get to the low-temperature catalytic oxidation remove first
The catalyst K-Pt/MnO of aldehyde2。
The catalyst of preparation is characterized using transmission electron microscope, the results are shown in Figure 1, and Fig. 1 is catalyst
TEM schemes.
(8) sample 0.06g is weighed, is placed in the quartz ampoule fixed bed reactors that internal diameter is 3mm, reaction atmosphere is
20ppmHCHO+80%N2+ 20%O2, reaction gas flow speed 50mL/min, catalyst space velocities 50000h-1, in humidity level RH
It is 50%, in the case that temperature is 0 DEG C, K-Pt/MnO2Realize 98% or so methanal removing efficiency.
Gas phase measures formaldehyde surplus, obtains the catalytic performance curve of catalyst, as shown in Figure 2.
Embodiment 2
A kind of K-Pt/MnO2Low-temperature catalytic oxidation removes the catalyst of formaldehyde, and carrier is specific surface area 86m2/ g, aperture
The three-dimensional manganese dioxide of 3.8nm, active component K/Pt, by mass percentage, always negative discretion is K/Pt metals in catalyst
7%, wherein Pt are 1%, K 6%, and surplus is carrier MnO2；The aperture averaging of catalyst is 2.8nm.
The K-Pt/MnO2The preparation method step of the catalyst of catalytic oxidative desulfurization formaldehyde is：
(1) gained 3D-MnO in 1 step 4 of Example2As carrier；
(2) 3D-MnO of the above-mentioned preparations of 0.3g is added in the deionized water of 10mL2, then it is added with stirring centainly in magnetic
The H of amount2PtCl6Solution to reach the nominal weight of Pt=1wt%, adds in 0.11g K immediately after2CO3；
(3) by NaBH45 milliliters of solution of (0.572M) and sodium citrate (1mM) mixed solution are rapidly added above-mentioned suspension
In liquid, 300min is stirred；
(4) centrifuged with deionized water, sample 60 DEG C it is dried overnight to get to the low-temperature catalytic oxidation remove first
The catalyst K-Pt/MnO of aldehyde2。
(5) sample 0.06g is weighed, is placed in the quartz ampoule fixed bed reactors that internal diameter is 3mm, reaction atmosphere 20ppm
HCHO+80%N2+ 20%O2, reaction gas flow speed 50mL/min, catalyst space velocities 50000h-1, it is in humidity level RH
50%, in the case that temperature is 5 DEG C, K-Pt/MnO2Realize 98% or so methanal removing efficiency.
Comparative example 1
Step 4 gained 3D-MnO in Example 12, sample 0.06g is weighed, is placed in the quartz ampoule fixed bed that internal diameter is 3mm
Reactor, reaction atmosphere are 20ppm HCHO+80%N2+ 20%O2, reaction gas flow speed 50mL/min, catalyst space velocities are
50000h-1, it is MnO in the case that 50% temperature is 130 DEG C in humidity level RH2Realize 98% or so methanal removing effect
Rate.
Gas phase measures formaldehyde surplus, obtains the catalytic performance curve of catalyst, as shown in Figure 2.
Comparative example 2
A kind of K/MnO2The catalyst of catalytic oxidative desulfurization formaldehyde, carrier are specific surface area 86m2/ g, the three of aperture 3.8nm
Tie up manganese dioxide, active component K；The aperture averaging of catalyst is 1.9nm.
The K/MnO2The preparation method step of the catalyst of catalytic oxidative desulfurization formaldehyde is：
(1) gained 3D-MnO in 1 step 4 of Example2As carrier；
(2) 1.1g K are being added in2CO310mL deionized waters in add in 1.5g MnO2Catalyst；
(3) under magnetic stirring, 22.7mL H are instilled dropwise2O2Solution.1h is stirred, centrifuges liquid phase；
Dry at (4) 110 DEG C, calcining 4h is to get to the catalyst K/ of the catalytic oxidative desulfurization formaldehyde at 450 DEG C
MnO2。
(5) sample 0.06g is weighed, is placed in the quartz ampoule fixed bed reactors that internal diameter is 3mm, reaction atmosphere 20ppm
HCHO+80%N2+ 20%O2, reaction gas flow speed 50mL/min, catalyst space velocities 50000h-1, it is in humidity level RH
50%, in the case that temperature is 25 DEG C, K/MnO2Realize 50% or so methanal removing efficiency, and MnO2Methanal removing effect
Rate is almost 0；In the case that temperature is 130 DEG C, K/MnO2Realize 98% or so methanal removing efficiency.
Gas phase measures formaldehyde surplus, obtains the catalytic performance curve of catalyst, as shown in Figure 2.
Comparative example 3
A kind of Pt/MnO2The catalyst of catalytic oxidative desulfurization formaldehyde, carrier are specific surface area 86m2/ g, the three of aperture 3.8nm
Tie up manganese dioxide, active component Pt；The aperture averaging of catalyst is 2.7-3.8nm.
The Pt/MnO2The preparation method step of the catalyst of catalytic oxidative desulfurization formaldehyde is：
(1) gained 3D-MnO in 1 step 4 of Example2As carrier；
(2) MnO of 0.3g is added in the deionized water of 10mL2Then catalyst is added with stirring a certain amount of in magnetic
H2PtCl6Solution, to reach the nominal weight of Pt=1wt%；
(3) by NaBH45 milliliters of solution of (0.572M) and sodium citrate (1mM) mixed solution are rapidly added in suspension,
Stir 300min；
(4) it is centrifuged with deionized water, sample is dried overnight to get to the catalytic oxidative desulfurization formaldehyde at 60 DEG C
Catalyst Pt/MnO2。
(5) sample 0.06g is weighed, is placed in the quartz ampoule fixed bed reactors that internal diameter is 3mm, reaction atmosphere is
20ppmHCHO+80%N2+ 20%O2, reaction gas flow speed 50mL/min, catalyst space velocities 50000h-1, in humidity level RH
It is 50%, in the case that temperature is 9 DEG C, Pt/MnO2Realize 98% or so methanal removing efficiency.
Gas phase measures formaldehyde surplus, obtains the catalytic performance curve of catalyst, as shown in Figure 2.
Embodiment 3：K-Pt/MnO2The stability test of catalyst
Catalyst prepared by Example 1, weighs sample 0.06g, is placed in the quartz ampoule fixed bed reaction that internal diameter is 3mm
Device, reaction atmosphere are 20ppm HCHO+80%N2+ 20%O2, reaction gas flow speed 50mL/min, catalyst space velocities 50000h-1, it is in the case that 50% temperature is 0 DEG C in humidity level RH, reacts and continue 70h, K-Pt/MnO2Still realize 98% or so
Methanal removing efficiency.This shows K-Pt/MnO2It is with good stability.
Gas phase measures formaldehyde surplus, obtains the stable in catalytic performance linearity curve of catalyst, as shown in Figure 3.
By above-described embodiment it is found that preparation method provided by the invention at a lower temperature, you can realize and higher urge
Change efficiency.
The explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (8)
1. a kind of method of low temperature removing formaldehyde, includes the following steps：
Using catalyst oxidation of formaldehyde；
The catalyst is the manganese dioxide for loading potassium and platinum；
The temperature of the catalysis oxidation is -10~25 DEG C.
2. according to the method described in claim 1, it is characterized in that, the manganese dioxide is 3D- manganese dioxide.
3. according to the method described in claim 1, it is characterized in that, the specific surface area of the manganese dioxide is 40~110m2/ g,
Aperture is 1.5~5nm；The grain size of the platinum is 1~3nm.
4. according to the method described in claim 1, it is characterized in that, in the catalyst, platinum content is 0.1wt%~1wt%,
Potassium content is 1wt%~13wt%.
5. according to the method described in claim 1, it is characterized in that, the catalyst is prepared in accordance with the following methods：
Manganese dioxide is impregnated in potassium resource compound, platinum source compound, NaBH4In the mixed solution of sodium citrate, Ran Hougan
It is dry.
6. according to the method described in claim 5, it is characterized in that, the time of the dipping for 1~for 24 hours；The temperature of the drying
It is 20~80 DEG C to spend, time of the drying for 1~for 24 hours；The temperature of the calcining is 300~650 DEG C, the time of the calcining
For 1~10h.
7. according to the method described in claim 5, it is characterized in that, the potassium resource compound is the water-soluble chemical combination containing potassium atom
Object；The platinum source compound is the water soluble compound containing pt atom.
8. according to the method described in claim 1, it is characterized in that, the atmosphere of the catalysis oxidation is 15~30ppm HCHO+
80%N2+ 20%O2, reaction gas flow speed is 40~60mL/min, and humidity level RH is 30%~80%, and catalyst space velocities are
40000~60000h-1。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126837A (en) * | 2018-09-30 | 2019-01-04 | 浙江净威环境科技有限公司 | A kind of efficient low concentration purifying indoor formaldehyde catalyst |
| CN113797925A (en) * | 2021-09-30 | 2021-12-17 | 佛山市顺德区阿波罗环保器材有限公司 | Formaldehyde removal catalyst and preparation method and application thereof |
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| CN113797925A (en) * | 2021-09-30 | 2021-12-17 | 佛山市顺德区阿波罗环保器材有限公司 | Formaldehyde removal catalyst and preparation method and application thereof |
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