CN208786160U - A kind of device of conductive porous material and Joule heat thermocatalytic degradation of formaldehyde in situ - Google Patents
A kind of device of conductive porous material and Joule heat thermocatalytic degradation of formaldehyde in situ Download PDFInfo
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- CN208786160U CN208786160U CN201821039993.3U CN201821039993U CN208786160U CN 208786160 U CN208786160 U CN 208786160U CN 201821039993 U CN201821039993 U CN 201821039993U CN 208786160 U CN208786160 U CN 208786160U
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Abstract
The utility model provides a kind of conductive porous material, comprising: porous material；It is coated on the graphene of the porous material surface；It is supported on the catalyst of the thermocatalytic degradation of formaldehyde in the porous material.The utility model provides a kind of device of Joule heat thermocatalytic degradation of formaldehyde in situ, including two conductive porous materials；The positive and negative electrode being separately positioned on two conductive porous materials；The physical absorbent being filled between two conductive porous materials, the positive and negative electrode are connected to power supply, make to be formed into a loop between two conductive porous materials.The device of original position Joule heat thermocatalytic degradation of formaldehyde provided by the utility model can be under low-down power, temperature needed for being rapidly reached thermocatalytic degradation of formaldehyde, it can be realized In Situ Heating catalytic effect, greatly reduce thermal loss caused by the approach such as heat transfer.
Description
Technical field
The utility model relates to technical field more particularly to a kind of conductive porous material and the joules in situ of curbing environmental pollution
The device of hot thermocatalytic degradation of formaldehyde.
Background technique
Formaldehyde is one of most important volatile pollutants of room temperature, it can be from wooden furniture, floor and some insulating layers
Equal places release, and release time longest can reach 30 years.The presence of these source of releases can allow indoor formaldehyde concentration
Be in for a long time far more than the concentration of the WTO safe formaldehyde limited, and the environment of this high-concentration formaldehyde can to the respiratory tract of the mankind,
Eyes and nervous system bring biggish damage.
Currently, the minimizing technology of indoor formaldehyde is concentrated mainly on physical absorption field, principle is by physical absorption material
Such as active carbon is expected by indoor formaldehyde absorbing, to achieve the effect that reduce indoor formaldehyde concentration.But physisorption material
With maximal absorptive capacity, and it will receive the influences such as environment temperature, humidity and cause bigger harm.
Therefore, seek a kind of effectively except carbaldehyde Method becomes those skilled in the art's urgent problem to be solved.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of conductive porous materials and Joule heat thermocatalytic drop in situ
The device of formaldehyde is solved, apparatus structure provided by the utility model is simple, low energy consumption, has good except effect of formaldehyde.
The utility model provides a kind of conductive porous material, comprising:
Porous material；
It is coated on the graphene of the porous material surface；
It is supported on the catalyst of the thermocatalytic degradation of formaldehyde in the porous material.
In the present invention, the porous material is preferably sponge or cloth-like material, and the cloth-like material is preferably cotton
Cloth-like material, more preferably mineral wool, woven dacron, mineral cloth or quartzy cotton；The sponge is preferably melamine sponge.This is practical
The novel source to the porous material does not have special limitation, can be bought and be obtained by market.
In the present invention, content of the graphene in the conductive porous material be preferably 0.035~
0.055mg/cm3, more preferably 0.045mg/cm3~0.055mg/cm3, most preferably 0.048mg/cm3~0.052mg/cm3。
In the present invention, the conductivity of the conductive porous material is preferably 0.1~0.3S/m, and more preferably 0.15
~0.25S/m, most preferably 0.18~0.22S/m.
In the present invention, the mode of the load preferably spraying, spin coating or infiltration.In the present invention, institute
The load capacity for stating the catalyst of thermocatalytic degradation of formaldehyde is preferably 20~40mg/cm3, more preferably 25~35mg/cm3, most preferably
For 28~32mg/cm3。
In the present invention, the catalyst of the thermocatalytic degradation of formaldehyde is preferably non-precious metal catalyst, more preferably
For catalyst of transition metal oxide, the transition metal is preferably one or more of Cu, Co, Mn and Ce；More preferably
MnO2-CeO2Catalyst, MnxCo3-xO4Catalyst, x are 1~2 or Co3O4, most preferably Co3O4.The utility model is to the warm
The catalyst of catalytic degradation formaldehyde does not have special limitation, and those skilled in the art can select suitably can according to the actual situation
The catalyst of thermocatalytic degradation of formaldehyde, the condition of considering cost and thermocatalytic degradation of formaldehyde, the utility model choosing
Select the non-noble metal catalyst for capableing of thermocatalytic degradation of formaldehyde.
In the present invention, the catalyst of the thermocatalytic degradation of formaldehyde is preferably powder catalyst.This is practical new
Type does not have special limitation to the source of the catalyst of the thermocatalytic degradation of formaldehyde, can be according to well known to those skilled in the art
Method is prepared, the MnO2-CeO2The preparation method of catalyst is preferred are as follows:
By Mn (NO3)2.6H2O,KMnO4(NH4)2Ce(NO3)6It is configured to mixed solution；
PH value will be adjusted after the mixed solution heating water bath, obtains mother liquor；
The mother liquor is cured, is filtered, drying and calcination, obtains MnO2-CeO2Catalyst.
In the present invention, Mn (NO in the mixed solution3)2.6H2The concentration of O is preferably 0.04~0.08mol/L,
More preferably 0.05~0.06mol/L, most preferably 0.07mol/L；KMnO in the mixed solution4Concentration be preferably 0.02
~0.06mol/L, more preferably 0.03~0.05mol/L, most preferably 0.04mol/L；(NH in the mixed solution4)2Ce
(NO3)6Concentration be preferably 0.05~0.15mol/L, more preferably 0.08~0.12mol/L, most preferably 0.1mol/L.
In the present invention, the temperature of the heating water bath is preferably 45~55 DEG C, more preferably 48~52 DEG C, optimal
It is selected as 50 DEG C.
In the present invention, it is preferred to use lye adjusts pH value, and the concentration of the lye is preferably 1~3mol/L, more
Preferably 1.5~2.5mol/L, most preferably 2mol/L；The lye is preferably KOH solution, and the pH value is preferably adjusted to 10
~11, more preferably 10.2~10.8, more preferably 10.4~10.6, most preferably 10.5.
In the present invention, the temperature of the curing is preferably 45~55 DEG C, and more preferably 48~52 DEG C, most preferably
50℃；The time of the curing is preferably 1~3 hour, more preferably 1.5~2.5 hours, most preferably 2 hours.
In the present invention, the method for the drying is preferably dried, and the temperature of the drying is preferably 80~120
DEG C, more preferably 90~110 DEG C, most preferably 100 DEG C；The time of the drying is preferably 4~8 hours, more preferably 5~7
Hour, most preferably 6 hours.
In the present invention, the temperature of the calcining is preferably 480~520 DEG C, more preferably 490~510 DEG C, optimal
It is selected as 500 DEG C；The time of the calcining is preferably 4~8 hours, more preferably 5~7 hours, most preferably 6 hours.
In the present invention, the preparation method of the conductive porous material is preferred are as follows:
Preparation is coated with the porous material of graphene；
The catalyst of thermocatalytic degradation of formaldehyde is loaded on the porous material for being coated with graphene.
In the present invention, the preparation method of the porous material for being coated with graphene is preferred are as follows:
The porous material for being coated with graphene oxide is restored, the porous material for being coated with graphene is obtained.
In the present invention, the preparation method of the porous material for being coated with graphene oxide is preferred are as follows:
Porous material is immersed in graphene oxide solution and is then centrifuged, obtains being coated with graphene oxide
Porous material.
In the present invention, the porous material is consistent with porous material described in above-mentioned technical proposal, no longer superfluous herein
It states.Not special limitation of the utility model to the size of the porous material, those skilled in the art can be according to actually going
Except the porous material of concentration or volume the selection suitable dimension of formaldehyde.
In the present invention, the concentration of the graphene oxide solution is preferably 0.5~5mg/mL, more preferably 1~
4mg/mL, most preferably 2~3mg/mL.The utility model does not have special limit to the preparation method of the graphene oxide solution
System, is prepared according to method well known to those skilled in the art.In the present invention, the graphene oxide solution
Preparation method it is preferred are as follows:
Graphene oxide solution is prepared according to modifiedhummersmethod method in graphite flake.
In the present invention, the revolving speed of the centrifuge separation is preferably 25000~35000 revs/min, more preferably
28000~32000 revs/min, most preferably 30000 revs/min.
In the present invention, preferably the porous material drying for being coated with graphene oxide is restored again.?
In the utility model, the reagent of the reduction is preferably HI solution；The temperature of the reduction is preferably 90~100 DEG C, more preferably
It is 92~98 DEG C, most preferably 94~96 DEG C；The time of the reduction is preferably 1~10s, more preferably 2~8s, most preferably
3~6s.
In the present invention, the method for the catalyst of the load thermocatalytic degradation of formaldehyde is preferred are as follows:
Binder is added in the catalyst dispersion of the thermocatalytic degradation of formaldehyde afterwards in a solvent, obtains mixed solution；
By mixed solution spraying, spin coating or infiltration on the above-mentioned porous material for being coated with graphene, then dry.
In the present invention, the method for the dispersion is preferably ultrasonic disperse, and the solvent is preferably ethanol solution；Institute
Stating binder is preferably naphthols.In the present invention, the method for the drying is preferably dried, and the temperature of the drying is preferred
It is 60~100 DEG C, more preferably 70~90 DEG C, most preferably 80 DEG C.In the present invention, preferably more in the drying process
Secondary overturning porous material is so that catalyst can be more evenly distributed in porous material.
The utility model provides a kind of device of Joule heat thermocatalytic degradation of formaldehyde in situ, comprising:
Two conductive porous materials, the conductive porous material are porous material described in above-mentioned technical proposal；
The positive and negative electrode being separately positioned on two conductive porous materials；
The physical absorbent being filled between two conductive porous materials；
The positive and negative electrode is connected to power supply, makes to be formed into a loop between two conductive porous materials.
In the present invention, the conductive porous material is consistent with conductive porous material described in above-mentioned technical proposal,
This is repeated no more；Described two conductive porous materials can be the same or different.
In the present invention, the positive and negative electrode is preferably independent selected from silver electrode, copper electrode, carbon electrode or graphite electricity
Pole, more preferably copper electrode, carbon electrode or graphite electrode.The positive and negative electrode is arranged described conductive porous in the utility model
Position on material does not have special limitation, and those skilled in the art can select to close according to the actual situation on conductive porous material
Positive and negative electrode is arranged in suitable position, and the positive and negative electrode is preferably provided at the side of the conductive porous material.
In the present invention, the physical absorbent is preferably in room temperature formaldehyde adsorption, in the suction of elevated temperature desorption formaldehyde
Attached dose, the high temperature is preferably 40~150 DEG C, more preferably 50~120 DEG C, more preferably 60~100 DEG C, most preferably 70~
80℃；The physical absorbent is more preferably diatom great soil group adsorbent or alumina type adsorbent.In the present invention, described
Physical absorbent is arranged between two conductive porous materials, specific spatial position of the utility model to the physical absorbent
There is no special limitation, can physical absorption be arranged between two conductive porous materials according to the actual situation in those skilled in the art
Physical absorbent can such as be arranged between the left and right of two conductive porous materials, make a left side for two conductive porous materials by agent
Right side coats physical absorbent, and physical absorbent can also be arranged in two conductive porous materials in-between, make two
The upper and lower surface of a conductive porous material coats physical absorbent.
In the present invention, the positive and negative electrode is connected to power supply, makes to be formed into a loop between two conductive porous materials.
In the present invention, the power supply is preferably DC power supply.In the present invention, one on described two conductive porous materials
A to be provided with positive electrode, another is provided with negative electrode, the anode of the positive electrode connection power supply, and the negative electrode connects power supply
Cathode, between the power supply and electrode preferably using conducting wire connect, the conducting wire is preferably copper conductor；The positive and negative electrode with
Preferably pass through conductive gluing knot, such as elargol between conductive porous material；Or the positive and negative electrode is fixed on conductive porous material
Material surface contacts electrode with conductive porous material surface；The utility model can make two by electrode when power supply is powered
It is formed into a loop between a conductive porous material.
In the present invention, it is also preferable to include thermocouple, institutes for the device of the Joule heat thermocatalytic degradation of formaldehyde in situ
It states thermocouple to be connected to conductive porous material, for detecting the temperature of conductive porous material.In the present invention, the original position
It is also preferable to include apparatus for placing for the device of Joule heat thermocatalytic degradation of formaldehyde, and the apparatus for placing is for holding conductive porous material
Material, positive and negative electrode and physical absorbent, so that the device knot for the Joule heat thermocatalytic degradation of formaldehyde in situ that utility model provides
Structure is compact, installs and easy to carry；The apparatus for placing is preferably single port polytetrafluoroethylene (PTFE) set.In the present invention, institute
The device of Joule heat thermocatalytic degradation of formaldehyde in situ is stated it is also preferable to include sealing device, the sealing device setting is held above-mentioned
Outside device, for sealing the formaldehyde gas of evolution apparatus for placing, it is avoided to pollute environment；The sealing device preferably with
The glass container of sealing-plug.In the present invention, the device of the Joule heat thermocatalytic degradation of formaldehyde in situ it is also preferable to include
Gas eduction unit, the gas eduction unit are used to export the formaldehyde gas in sealing device, be examined with PARA FORMALDEHYDE PRILLS(91,95) content
It surveys, the gas eduction unit is preferably conduit, and the conduit is preferably inserted into the sealing-plug of glass container.
Structural schematic diagram such as Fig. 1 of the device of original position Joule heat thermocatalytic degradation of formaldehyde provided by the embodiment of the utility model
It is shown, comprising:
Glass container 9 with sealing-plug；
The single port polytetrafluoroethylene (PTFE) set 2 being placed on inside glass container 9；
Two conductive porous materials 4 being placed in single port polytetrafluoroethylene (PTFE) set 2；
The physical absorbent 1 being filled between two conductive porous materials 4；
The positive and negative electrode 3 being separately positioned on two conductive porous materials 4；
The DC power supply 8 being connected to by copper wire 5 with positive and negative electrode；
The thermocouple 6 at conductive porous electrode material center is set；
It is inserted into the gas conduit 7 of sealing-plug.
The device of the hot thermocatalytic degradation of formaldehyde of original position Joule heat provided by the utility model, using three-dimensional porous material conduct
Substrate, very small amount of graphene can be conductive by porous material in cladding, and in the porous material bone for being coated with graphene
Thermal degradation catalyst is loaded on frame again, graphene heat production is allowed by alive mode in this way, directly heats catalyst and week
The atmosphere enclosed improves rapidly its temperature, and due to the heat preservation and insulation that porous material has, the heat of generation will not be rapid
Diffusion, to further reduced the energy consumption problem as caused by thermal diffusion.At the same time, in conjunction with desorption formaldehyde under high temperature
Physical absorbent, high throughput reduces the gas flow rate passed through by formaldehyde pollution gas after adsorption saturation when room temperature,
Electrified regulation substantially reduces the energy loss as caused by thermal convection, realizes the room air effect of super low energy consumption purification large area
Fruit.
The course of work of the device of original position Joule heat thermocatalytic degradation of formaldehyde provided by the utility model are as follows: under room temperature
Formaldehyde gas allows the abundant formaldehyde adsorption of the physical absorbent being filled in two conductive porous materials by whole device, to it
After adsorption saturation, voltage is applied to the device, power supply is connected to forming circuit with conductive porous material, and conductive porous material skeleton produces
Heat amount, and transfer heat on physical absorbent therein, the adsorbed formaldehyde of physical absorbent is discharged at high temperature
It is using the catalyst of the thermocatalytic degradation of formaldehyde loaded in conductive porous material that formaldehyde is degradable on conductive porous material.
The utility model provides the application method of above-mentioned Joule heat thermocatalytic degradation of formaldehyde device in situ: physical absorbent
To device electrified regulation after adsorption saturation, adsorbed Form aldehyde release is come out, has leading for catalyst by the load after heating
Electric porous material and be degraded.
The utility model provide the device of the Joule heat thermocatalytic degradation of formaldehyde in situ described by adopting the above technical scheme into
The method of row Degradation Formaldehyde:
Power supply is opened, voltage is applied to positive and negative electrode, makes conductive porous material electrified regulation.
In the present invention, before opening power supply, formaldehyde gas is preferably passed through the Joule heat thermocatalytic in situ
In the device of degradation of formaldehyde, so that formaldehyde gas is physically adsorbed agent absorption, physical absorbent is made to reach saturation.In the utility model
In, the concentration of the formaldehyde gas is preferably 10~100ppm, more preferably 20~80ppm, more preferably 30~60ppm, most
Preferably 40~50ppm.In the present invention, the flow velocity that is passed through of the formaldehyde gas is preferably 100~300mL/min, more
Preferably 150~250mL/min, most preferably 180~220mL/min.
In the present invention, the voltage preferably makes the temperature of conductive porous material reach 40~150 DEG C, more preferably
50~120 DEG C, more preferably 60~100 DEG C, most preferably 70~90 DEG C.In the present invention, the voltage is more preferably
The temperature at the center of conductive porous material is set to reach 40~150 DEG C, more preferably 50~120 DEG C, more preferably 60~100 DEG C,
Most preferably 70~90 DEG C.The utility model does not have special limitation to the center of the conductive porous material, according to this
The center for the object that field technical staff routinely understands, preferably the geometric center position of conductive porous material.
Catalysed oxidation processes can thoroughly solve the pollution problem of formaldehyde in the prior art, and most widely used is noble metal
The method of system room temperature degradation of formaldehyde, this method do not need any auxiliary thermal technology, can be in air under room ambient conditions
The degradation of formaldehyde pollution gas, but noble metal expensive, scarcity of resources are restricted the application of this method.It is non-expensive
Metallic catalyst is also able to achieve the complete catalytic degradation of formaldehyde, but it needs the heating of auxiliary thermal that can reach catalysis instead
The reaction condition answered.The features such as traditional auxiliary thermal element energy consumption is high, heat dissipation is big makes it difficult to be applied to field of household appliances.
The utility model uses commercialized porous material, such as sponge to coat minimal amount of graphene as heating unit
Part, then by simply infiltrate, spray the methods of non-precious metal catalyst is supported in above-mentioned heating element, from without
Being additionally provided heating element can be realized catalytic degradation, and its three-dimensional porous structure can allow the contact area of catalyst to obtain
It is promoted to further.
The device of original position Joule heat thermocatalytic degradation of formaldehyde provided by the utility model, the mistake of the formaldehyde in degradation air
Cheng Zhong, room temperature high throughput are powered to conductive porous material after adsorption saturation by formaldehyde pollution gas, are coated on conduction to allow
Graphene heat production on porous material skeleton, the physical absorbent for directly heating catalyst and being contacted by heat transfer are fast
Speed promotes its temperature, and physical absorbent is by thermal desorption formaldehyde and the catalysis that is degraded.Device provided by the utility model can be complete
The heated formaldehyde be desorbed of physical absorbent is decomposed, and can be reused.
The device of original position Joule heat degradation of formaldehyde provided by the utility model has extraordinary mechanical performance and can be processed
Performance can thoroughly solve the problems, such as that energy consumption is high in conjunction with physical absorbent such as diatomite etc., realize super low energy consumption degradation of formaldehyde
Effect.
The device condition of original position Joule heat thermocatalytic degradation of formaldehyde provided by the utility model requires low, easy to operate, energy
It consumes low, is easy to practical application, have for volatile organics contaminant degradations such as formaldehyde in indoor environment and atmosphere very high
Efficiency.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the structural schematic diagram of Joule heat thermocatalytic degradation of formaldehyde device in situ provided by the embodiment of the utility model；
Fig. 2 is the scanned picture of melamine sponge sheet used by the utility model embodiment 1；
Fig. 3 is the melamine sponge scanned picture after coated graphite alkene prepared by the utility model embodiment 1；
Fig. 4 is the melamine sponge in the utility model embodiment 1, the melamine sponge after cladding graphene oxide and oxidation
Graphene be reduced after melamine sponge Raman spectrum；
Fig. 5 is the scanned picture of the graphene sponge for having loaded catalyst prepared by the utility model embodiment 3；
Fig. 6 is the scanned picture of the graphene sponge for having loaded catalyst prepared by the utility model embodiment 3；
Fig. 7 is the performance curve of the Degradation Formaldehyde of the utility model embodiment 5 and comparative example test；
Fig. 8 is that the utility model embodiment 5 has loaded the graphene sponge after catalyst and passes through heating and heating mantle heats
The ascending curve of its central temperature；
Fig. 9 is the cycle performance curve of room temperature adsorption-desorption degradation experiment in the utility model embodiment 5 and comparative example；
Figure 10 is the transmission picture of catalyst in the utility model embodiment 5；
Figure 11 is the transmission picture of catalyst in the utility model embodiment 6；
Figure 12 is the transmission picture of catalyst in the utility model embodiment 7；
Figure 13 is the relational graph of the Degradation Formaldehyde performance and temperature in embodiment 5,6,7.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Concentration of formaldehyde is by Britain PPM company PPM-400ST hand-held precision first in the utility model following embodiment
Aldehyde concentration detector test.
Physical absorbent used in the utility model following embodiment is commercially available diatomite adsorbant.
The preparation of 1 graphene coated conductive porous material of embodiment
Commercialized graphite flake is taken, it is water-soluble that graphene oxide is prepared using modifiedhummersmethod method
Liquid, mass concentration 3mg/mL；It is 1.5*1.5*2cm sample block that commercialized melamine sponge, which is cut into size, immerses above-mentioned oxidation
In graphene aqueous solution, the centrifuge separation of 30000 revs/min of progress is then taken out, the porous material for being coated with graphene oxide is obtained
Material.
The above-mentioned porous material drying for being coated with graphene oxide is placed in the HI solution of heat and is restored, reduction temperature
Degree is 95 DEG C, recovery time 5s.
Product after reduction is cleaned for several times repeatedly with second alcohol and water, is finally placed in 210 DEG C of baking ovens and dries 3 hours, obtain
To the conductive porous material for being coated with graphene.
The content of what the utility model embodiment 1 was prepared be coated with graphene in the conductive porous material of graphene is
0.045mg/cm3。
The scanned picture of melamine sponge in the utility model embodiment 1 is as shown in Fig. 2, the coated graphite alkene being prepared
The scanned picture of melamine sponge afterwards is as shown in figure 3, melamine sponge and coated graphite alkene after melamine sponge, cladding graphene oxide
Melamine sponge Raman spectrum it is as shown in Figure 4.
2 MnO of embodiment2-CeO2The preparation of powder catalyst
Reference literature " MnOx–CeO2mixed oxide catalysts for complete oxidation of
Institute is public in formaldehyde:Effect of preparation method and calcination temperature "
It is prepared by the synthetic method opened:
Weigh suitable Mn (NO3)2.6H2O、KMnO4(NH4)2Ce(NO3)6, configure the Mn (NO of 50mL3)2.6H2O、
KMnO4(NH4)2Ce(NO3)6Concentration is respectively the mixed solution of 0.06mol/L, 0.04mol/L and 0.1mol/L, will be described mixed
Solution is closed in 50 DEG C of heating water baths, while 2mol/L KOH solution regulation pH to 10.5 is added, is then put into obtained mother liquor
2h is cured in 50 DEG C of baking ovens, is then filtered, by obtained sample in 100 DEG C of drying 6h, then in 500 DEG C of calcining 6h, is obtained
MnO2-CeO2Powder catalyst.
Embodiment 3 loads the preparation of the conductive porous material of thermal degradation catalyst
By the above-mentioned MnO of 0.2g2-CeO2Powder catalyst ultrasonic disperse is added a little into suitable ethanol solution
Naphthols uniformly sprays configured solution on graphene sponge as bonding agent, is placed in 80 DEG C of baking ovens and dries, the phase
Between overturn sponge repeatedly to guarantee that catalyst can be relatively uniform is distributed on sponge skeleton.
The load that the utility model embodiment 3 is prepared have the graphene sponge of catalyst scanned picture such as Fig. 5 and
Shown in Fig. 6.
The conductivity of the conductive porous material for the load thermal degradation catalyst that the utility model embodiment 3 is prepared is
0.2S/m。
The device of the Joule heat thermal degradation formaldehyde in situ of embodiment 4
The device of original position Joule heat thermal degradation formaldehyde provided in this embodiment is as shown in Figure 1, comprising: physical absorbent 1, it is single
Mouth polytetrafluoroethylene (PTFE) set 2, positive and negative electrode (copper electrode) 3 load the conductive porous material (preparation of embodiment 3 of thermal degradation catalyst
Obtain) 4, copper conductor 5, thermocouple 6, gas conduit 7, DC power supply 8 and tool fill in vial 9.The object that formaldehyde absorbing is saturated
Reason adsorbent is filled between two conductive porous materials, and the conductive porous material for loading thermal degradation catalyst is gathered mounted in single port
In tetrafluoroethene casing, and upper positive and negative electrode is pressed from both sides at conductive porous material both ends, is drawn and power supply with copper conduction on the electrode
Positive and negative anodes are connected, which is placed in 500mL tool plug vial, copper conductor is pulled out from rubber stopper, and in rubber stopper
The grass tube that an outer diameter is 3mm is inserted at center, is convenient for collecting test, grass tube upper port conduit cap when device is run
It seals.
The method of the Joule heat thermal degradation formaldehyde in situ of embodiment 5
Using the device degradation of formaldehyde of embodiment 4, the conductive porous material electrode of load thermal degradation catalyst will be connected to
On copper conductor forming circuit is connected with DC power supply, and press suitable voltage by conductive porous material sponge center temperature
Reaching 120 DEG C maintains 1 hour (due to the adsorption saturation formaldehyde of the physical absorbent in embodiment 4, can directly carry out the drop of formaldehyde
Solution, carries out Degradation Formaldehyde as the unadsorbed formaldehyde of physical absorbent can first carry out formaldehyde absorbing again), every 10min hand-held essence
Close methylene oxide detecting instrument samples 2mL sample by gas conduit and carries out concentration of formaldehyde test, and records test result.
The method of the Joule heat thermal degradation formaldehyde in situ of embodiment 6
Degradation Formaldehyde is carried out according to the method for embodiment 5, the difference with embodiment 5 is, application voltage makes conductive porous
The temperature at material sponge center reaches 110 DEG C, maintains 1 hour, the catalyst of the thermal degradation formaldehyde loaded in conductive porous material
For MnxCo3-xO4(x is 1~2), the catalyst is referred to document " MnxCo3-xO4solid solution as high-
Side disclosed in efficient catalysts for low-temperature oxidation of formaldehyde "
Method synthesis.
The method of the Joule heat thermal degradation formaldehyde in situ of embodiment 7
Degradation Formaldehyde is carried out according to the method for embodiment 5, the difference with embodiment 5 is, application voltage makes conductive porous
The temperature at material sponge center reaches 140 DEG C and maintains 1 hour, and the catalyst of the thermal degradation formaldehyde loaded in conductive porous material is
Co3O4；The catalyst is referred to document " Low-temperature oxidation of CO catalysed by
Co3O4The synthesis of method disclosed in nanorods ".
Comparative example 1
Using the device of the thermal degradation formaldehyde in embodiment 4, the difference with embodiment 4 is, not in conductive porous material
Upper setting positive and negative electrode, but in one layer of heat tape of teflon sleeve outer cladding, heat tape is connected with power supply, it will
Electric heating in situ replaces with heat tape heating.
It degrades according to the method PARA FORMALDEHYDE PRILLS(91,95) of embodiment 5, reaches conductive porous material central temperature by heat tape
To 120 DEG C.
Comparative example 2
Using the device of the thermal degradation formaldehyde in embodiment 4, the difference with embodiment 4 is, using being coated with graphene
Porous material alternative embodiment 4 in conductive porous material (i.e. porous material does not load thermal degradation catalyst).
It degrades according to the method PARA FORMALDEHYDE PRILLS(91,95) of embodiment 5.
8 experimental result of embodiment
Fig. 7 is the test result figure of the formaldehyde conversion of the utility model embodiment 5 and comparative example, from figure 7 it can be seen that
For the physical absorbent of adsorption saturation, by the conductive porous material electrified regulation catalytic degradation for loading thermal degradation catalyst
Afterwards, the internal formaldehyde adsorbed is not fully cleaned up, is not diffused into tool plug bottle (line of dots).And external cladding heating tape passes through
Heat transmitting carries out heatable catalytic degradation, and the formaldehyde adsorbed inside physical absorbent has part to be diffused into tool plug bottle, causes two
Secondary pollution (triangle line).The conductive porous material for not loading thermal degradation catalyst is as the concentration of formaldehyde in its bottle of blank group
Highest, the formaldehyde released can be catalyzed completely by the conductive porous material for having confirmed load thermal degradation catalyst from side
It degrades (square line).
By thermocouple assay conductive porous material central temperature with the variation of time, testing result is as shown in figure 8, figure
8 show the rising of conductive porous material (embodiment 3 is prepared) energization rear center temperature of load thermal degradation catalyst
Curve only needs tens seconds, and conductive porous material can reach required temperature (square line) under very low power, compared to outer
Portion coat heating tape heating method, by theoretical calculation its in the extraordinary situation of heat insulation effect, required heating power
Have more place's several times than In Situ Heating mode, and the time needed for being heated to same temperature under the power have more tens or even
Hundred times (line of dots).
Be heated to same temperature by heat tape, formaldehyde do not have it is degradable because in temperature-rise period, heat from
It transmits outside to inside, external temperature highest when just starting in whole device, formaldehyde desorption in part is had after physical absorbent heat absorption
Out, the catalytic temperature that peak efficiency has not been reached yet as the temperature among the conductive porous material of catalytic core at this time, leads
Cause this part formaldehyde not degradable.
And conductive porous material electrified regulation is given, heat transfer is spread from inside to outside, since melamine sponge is with excellent
Thermal and insulating performance, the heat that sponge skeleton generates can firmly be locked inside sponge and seldom partially be diffused into environment.
At this time physical absorbent be by with sponge surface transmission of heat by contact, will also allow around physical absorbent reach desorption temperature when
It waits, the temperature inside sponge has settled out.This is load thermal degradation catalyst conductive porous material institute in the utility model
The special-effect having.
Fig. 9 is to be placed again into adsorb in the atmosphere of formaldehyde by the physical absorbent after desorption in embodiment 5 and comparative example to satisfy
With, and repeat absorption-thermal desorption experiment test result, it can be seen that entire dress provided by the embodiment of the utility model
It sets that stability is very good, still is able to guarantee its high performance degradation function (square line after 20 adsorption-desorptions are repeated
For embodiment, line of dots and triangle line are comparative example), there is extensive valence in subsequent industrialized production and practical application
Value.
Figure 13 is the degradation property of formaldehyde and the relational graph of temperature in 5~embodiment of the utility model embodiment 7, can be seen
Out, carrying out Degradation Formaldehyde using method provided by the embodiment of the utility model has good degradation effect.
As seen from the above embodiment, the utility model provides a kind of device of Joule heat thermocatalytic degradation of formaldehyde in situ,
Including two conductive porous materials, the conductive porous material load has the catalyst of thermocatalytic degradation of formaldehyde；It is separately positioned on
Positive and negative electrode on two conductive porous materials；The physical absorbent being filled between two conductive porous materials, it is described positive and negative
Electrode is connected to power supply, makes to be formed into a loop between two conductive porous materials.Original position Joule heat heat provided by the utility model is urged
The device for changing degradation of formaldehyde can be under low-down power, temperature needed for being rapidly reached thermocatalytic degradation of formaldehyde, with tradition
The auxiliary hot equipment of electricity compare, device provided by the utility model does not need to introduce any other heating element, can be realized original
Position heatable catalytic degradation effect, greatly reduces thermal loss caused by the approach such as heat transfer.Dress provided by the utility model
Set that structure is simple, machinability is strong, it is cheap.
Above-described embodiment not is to embodiment just for the sake of clearly demonstrating the citing that the utility model is done
It limits completely.Those of ordinary skill in the art can also make other various forms of changes on the basis of the above description
It is dynamic, embodiment can not be provided without to all embodiments here, but the obvious variation thus amplified out is still
In the protection scope of the utility model.
Claims (10)
1. a kind of conductive porous material, comprising:
Porous material；
It is coated on the graphene of the porous material surface；
It is supported on the catalyst of the thermocatalytic degradation of formaldehyde in the porous material.
2. conductive porous material according to claim 1, which is characterized in that the mode of the load be spraying, spin coating or
Infiltration.
3. conductive porous material according to claim 1, which is characterized in that the porous material is sponge or dry goods material
Material.
4. conductive porous material according to claim 1, which is characterized in that the graphene is in conductive porous material
Content is 0.035~0.055mg/cm3。
5. conductive porous material according to claim 1, which is characterized in that the catalyst of the thermocatalytic degradation of formaldehyde is
Non-precious metal catalyst.
6. a kind of device of original position Joule heat thermocatalytic degradation of formaldehyde, comprising:
Two conductive porous materials, the conductive porous material are conductive porous material described in claim 1；
The positive and negative electrode being separately positioned on two conductive porous materials；
The physical absorbent being filled between two conductive porous materials；
The positive and negative electrode is connected to power supply, makes to be formed into a loop between two conductive porous materials.
7. the device of original position Joule heat thermocatalytic degradation of formaldehyde according to claim 6, which is characterized in that the positive negative electricity
It is extremely independent to be selected from silver electrode, copper electrode, carbon electrode or graphite electrode.
8. the device of original position Joule heat thermocatalytic degradation of formaldehyde according to claim 6, which is characterized in that the physics is inhaled
Attached dose of formaldehyde adsorption at room temperature, is desorbed formaldehyde at high temperature, and the high temperature is 40~150 DEG C.
9. the device of original position Joule heat thermocatalytic degradation of formaldehyde according to claim 6, which is characterized in that further include:
Thermocouple, the thermocouple are connected to conductive porous material, for detecting the temperature of conductive porous material.
10. the device of original position Joule heat thermocatalytic degradation of formaldehyde according to claim 6, which is characterized in that further include:
Apparatus for placing, the apparatus for placing is for holding conductive porous material, positive and negative electrode and physical absorbent.
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| CN201821039993.3U CN208786160U (en) | 2018-06-29 | 2018-06-29 | A kind of device of conductive porous material and Joule heat thermocatalytic degradation of formaldehyde in situ |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821039993.3U CN208786160U (en) | 2018-06-29 | 2018-06-29 | A kind of device of conductive porous material and Joule heat thermocatalytic degradation of formaldehyde in situ |
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2018
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