CN105032458B - A kind of method for preparing the modified cordierite in surface - Google Patents
A kind of method for preparing the modified cordierite in surface Download PDFInfo
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- CN105032458B CN105032458B CN201510413337.XA CN201510413337A CN105032458B CN 105032458 B CN105032458 B CN 105032458B CN 201510413337 A CN201510413337 A CN 201510413337A CN 105032458 B CN105032458 B CN 105032458B
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Abstract
The invention discloses a kind of method for preparing the modified cordierite in surface, cordierite dielectric surface is set to wrap up one layer of SiOC presoma first with sol impregnation method, then the polystyrene microsphere for being prepared using emulsion polymerization is crosslinked with cordierite sample, finally composite crosslinking body is pyrolyzed, obtaining surface has the cordierite of nanometer porous structure.Technical scheme overcomes the too high defect of the main passive regeneration process temperature of existing particulate matter filtering bodies, nano level pore space structure reduces the ignition point of carbon black, the conversion ratio of carbon black is improve, is conducive to particulate matter filtering bodies for being regenerated in diesel engine vent gas processing procedure.
Description
The application is Application No. 201310358768.1, and the applying date is August in 2013 15, entitled " a kind of
The divisional application of modified cordierite in surface and its preparation method and application ".
Technical field
The invention belongs to be catalyzed carbon-smoke combustion technical field, more particularly, it is related to a kind of being made on cordierite surface to receive
The porous preparation method and applications of meter level.
Background technology
Diesel car occupies increasing share by feat of good mobility and economy in automotive field, but
Put into effect stricter Abgasgesetz in succession with various countries, exhaust emissions of diesel engine has become restriction diesel engine further to be developed
Bottleneck factor.And the particulate matter (PM) in diesel engine vent gas especially PM2.5 has stronger carcinogenesis to human body.At present,
Particulate matter filtering bodies (DPF) are one of maximally effective post-processing technologies for reducing diesel particulate discharge generally acknowledged at present.But
As the deposition of soot particulate, pressure drop are raised, cause the reduction of engine power and fuel economy, it is necessary to which DPF is carried out
Regeneration.The regeneration of DPF mainly has two ways：One kind is initiative regeneration, i.e., dpf temperature is reached particulate matter by external energy
Ignition point, be deposited on filtering bodies dielectric surface particulate matter burning；Another kind is passive regeneration, i.e., relatively low
Under Tail Pipe Temperature, the oxidation of particulate matter is realized.Because temperature is higher during initiative regeneration, cause DPF in regenerative process
Easily there is crackle, damage the performance of DPF；Therefore, passive regeneration turns into the main side of particulate matter filtering bodies (DPF) regeneration research
To.The ignition point for being deposited on the particulate matter of DPF dielectric surfaces is relevant with two factors：The macroscopical and microcosmic physicochemical property of particulate matter
With DPF dielectric surfaces and the exposure level of particulate matter.Therefore, if the pattern for changing DPF dielectric surfaces is allowed to and particulate matter chi
It is very little match reach close contact, can just significantly reduce the ignition point of particulate matter, be conducive to the passive regeneration of DPF.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, existing particulate matter filtering bodies (DPF) are overcome main
A kind of too high defect of passive regeneration process temperature, there is provided the preparation method of the modified cordierite in surface.It is modified by surface
Cordierite can significantly reduce the ignition point of soot, be conducive to DPF for being regenerated in diesel engine vent gas processing procedure.
Technical purpose of the invention is achieved by following technical proposals：
Modified cordierite in a kind of surface and preparation method thereof, is carried out as steps described below：
Step 1, prepares polystyrene microsphere (PS) and the well mixed crosslinked colloidal sol of SiOC presomas
Weigh the hydrogen containing siloxane (PHMS) and 1 of identical mass fraction, 3,5,7- tetramethyl -1,3,5,7- tetravinyls
Cyclotetrasiloxane (D4Vi) mixed, be then added thereto to methyl vinyl silicone coordination platinum catalyst, then thereto
The polystyrene microsphere (PS) of 0.1-1 mass fractions is added, is uniformly dispersed.
In above-mentioned preparation process, selection ultrasonic disperse mode is disperseed to system.
In above-mentioned preparation process, the coordination platinum catalyst is coordinated platinum catalyst (platinum from methyl vinyl silicone
Content：Shenzhen platinum complex Co., Ltd 300ppm) is purchased from, its chemical formula is as follows：
Catalyst charge is 1%-the 3% of hydrogen containing siloxane and t etram-ethyltetravinylcyclotetrasiloxane gross mass,
The speed how much main influence cross-linking reactions of its addition are carried out.
The polystyrene microsphere (PS) such as utilizes emulsion from the polystyrene microsphere often selected in method for preparing template
Polymerization prepares polystyrene (PS) microballoon, but needs the particle diameter distribution of the polystyrene microsphere of selection uniform, more single, example
Such as the PS microballoons of emulsion polymerization synthesis, its particle diameter is 200nm, and favorable dispersibility.According to volume ratio distilled water：Absolute ethyl alcohol
=100:30 prepare ethanol water, and the PH of ethanol water is adjusted with the NaOH solution that concentration is 0.1-0.3mol/L, make molten
The PH of liquid>7, then by mass fraction for the butyl titanate ethanol solution of 4-8% is added in above-mentioned ethanol water,
Stirring reaction 40min at 30-40 DEG C, the TiO 2 sol stablized；The TiO 2 sol that will be obtained is transferred to four mouthfuls
In flask, protective gas nitrogen (N is passed through2), then successively in four-hole boiling flask add dodecyl sodium sulfate (emulsifying agent),
Stupid ethene, ammonium persulfate (initiator), 60-75 DEG C of constant temperature stirring reaction 8-10h, obtain polystyrene microsphere emulsion.Use quality
Concentration is that 5% NaOH solution is demulsified to emulsion, system is filtered, is washed, and 24h is dried at 60 DEG C and obtains PS microballoons
Powder (photonic crystal of opals structure of Tang Rongnian, PS/TiO2 composite is prepared and sign, electronic component and material, and 2003
Year).
Step 2, makes cordierite dielectric surface wrap up polystyrene microsphere (PS) and SiOC presomas using sol impregnation method
Well mixed crosslinked colloidal sol
When being impregnated, cordierite medium is impregnated in crosslinked colloidal sol, dip time (soaking) is at least
30min, preferably 2-4h.
Before being impregnated, selection is anticipated to cordierite dielectric surface：Cordierite is cut into length：It is wide：It is high
=8-10mm：8-10mm：15-17mm, is put into the mixed solution that volume ratio acetone/ethanol is 3 and soaks 3-5h, is then placed in 60
2-3h is dried in DEG C baking oven；Dried sample is soaked in the nitric acid (HNO that concentration is 0.5-1mol/L3) 3-5h in solution,
Sample after immersion is put into drying for standby in drying box after being cleaned with deionized water.
After the infusion has taken place, air blast through hole after taking-up, makes cordierite dielectric surface adhere to upper PS and SiOC presomas
Crosslinked colloidal sol, constant temperature 4h at being subsequently placed in 50 DEG C obtains the composite crosslinking body of cordierite, PS microballoons and SiOC presomas.
Step 3, the composite crosslinking body prepared in step 2 is pyrolyzed, and obtaining surface has nanometer porous structure
Cordierite
It is pyrolyzed in inert environments first：Programming rate according to 1-2 DEG C/min is warming up to for 20-25 DEG C from room temperature
700~900 DEG C, then 1-2h of constant temperature drops to room temperature 20-25 with the cooling rate of 3~6 DEG C/min in inert gas shielding
DEG C, the composite crosslinking body after being pyrolyzed in atmosphere of inert gases is pyrolyzed, according to the liter of 1-2 DEG C/min again in atmosphere
Warm speed is warming up to 700~900 DEG C for 20-25 DEG C from room temperature, and then constant temperature 1h is down to the cooling rate with 3~6 DEG C/min
20-25 DEG C of room temperature；
The inert environments selection inert gas is achieved, and is first passed through inert gas to exclude in high temperature process furnances stove
Continue to be passed through inert gas after air, for example, be first passed through inert gas 4-6min, throughput is controlled in 200-400sccm, drained
After air in stove, continue to be passed through gas；The inert gas selection argon gas, nitrogen or helium.
There is nanoscale Hierarchical porosity structure by modified cordierite dielectric surface, pore size distribution$ is more uniform,
Pore diameter range concentrates on 100-150nm, and pore structure thickness is 2-4 PS microballoons layer；Modified cordierite makes the conversion of carbon black
Rate is significantly improved.The SEM of 1-4 displays is (using HIT's X-650 scanning electron microscopies with reference to the accompanying drawings
Mirror) photo understand, PS microballoons be in orderly close-packed structure, show using emulsion polymerization prepare PS microballoons there is shape to advise
Then, size structure is homogeneous, and diameter range integrated distribution is in 170-200nm；After composite crosslinking body is through sintering in argon gas, air,
The micro-sphere crosslinked parts of PS have been formed in situ pore space structure, and closely packed pattern is obtained PS microballoons in cordierite dielectric surface in order
The duplication of height.PS microballoons and hole diameter in contrast accompanying drawing, it is found that the hole diameter after the completion of sintering is slightly less than PS microballoons, this
It is, because the framework of empty structure is SiOC, a certain degree of contraction can occur during SiOC is sintered into by SiOC presomas
It is caused.
EDX energy spectrum analysis is done by the cordierite dielectric surface after the completion of sintering, is shown, modified dielectric surface
Elemental composition is Si, O, C and also contains a small amount of La, the atomic ratio shared by them：[Si]=24.4%, [O]=
58.84%, [C]=15.27%；Therefore dielectric surface composition is after the completion of can tentatively judging sintering：Si1.6O3.85C。
The modified cordierite (embodiment 1,4 and 5) of surface texture has been investigated to carbon black particle using thermogravimetry (TGA)
Catalytic oxidation performance.To simplify experimentation, using the carbon black diesel oil substitute of German goldschmidt chemical corporation (DegussaAG)
Dry carbon cigarette in machine discharge carbon soot particles, both main components are identical, and crystal grain is similar with specific surface area.Laboratory apparatus is the U.S.
Perkin-Elmer companies Pyris Diamond thermal analyzers, measurement temperature scope is 30-800 DEG C, air atmosphere, gas stream
Fast 20.0ml/min, 10 DEG C/min of heating rate.By thermogravimetric curve be converted into soot conversion ratio can obtain one it is smooth continuous
Different temperatures under to the curve of soot conversion ratio, knowable to accompanying drawing 5, surface is that the cordierite that ordered porous structural is modified is (real
Apply example 5) unmodified cordierite is substantially better than at the very start to the conversion ratio of carbon black, (the initiation temperature of pure carbon black at 500 DEG C
Ti), surface is that the cordierite that ordered porous structural is modified reaches 75% to the conversion ratio of carbon black, without by any modified
Cordierite only has 30% to the conversion ratio of carbon black, and this shows, nano level pore space structure reduces the ignition point of carbon black, improves
The conversion ratio of carbon black.Embodiment 4 fails to show to be substantially better than embodiment 1 to the conversion ratio of carbon black in accompanying drawing 5, because real
The pore space structure skewness in example 4 is applied, and is not multilayered structure, fail to show to charcoal in the presence of systematic error
The raising of black conversion ratio.As can be seen here, the modified cordierite in surface for being obtained according to technical solution of the present invention is realizing soot conversion
Middle to realize application, the temperature for realizing soot conversion is 30-800 DEG C, preferably 300-800 DEG C.
Brief description of the drawings
Fig. 1 is the SEM figures of the polystyrene microsphere of orderly accumulation.
Fig. 2 is surface unmodified cordierite inner surface SEM figures.
Fig. 3 is modified cordierite inner surface SEM figures (1) in surface.
Fig. 4 is modified cordierite inner surface SEM figures (2) in surface..
Fig. 5 is conversion ratio activity curve of the cordierite sample to carbon black.
Specific embodiment
Technical scheme, wherein containing hydrogen silicone oil (PHMS, analysis are further illustrated with reference to specific embodiment
It is pure) it is purchased from Jilin Huafeng Organic Silicon Co., Ltd.；1,3,5,7-tetramethyl 1,3,5,7-tetravinyl cyclotetrasiloxane
(D4Vi, analyzes pure) it is purchased from the rainbow Industrial Co., Ltd.s of Zhejiang San Men thousand；Methyl vinyl silicone coordination platinum catalyst (Pt%=
3000ppm) it is purchased from Shenzhen platinum complex Co., Ltd.
Embodiment 1
Cordierite is cut into length：It is wide：Height=10mm：10mm：5mm, in the mixed solution that acetone/ethanol volume ratio is 3
After immersion 4h, 4h is dried at 60 DEG C；Then dried cordierite is placed in the HNO that concentration is 1mol/L3Soaked in solution
4h, after being rinsed repeatedly with distilled water, it is standby at 100 DEG C to dry 12h.It is 1 according to mass ratio：1 weighs hydrogen containing siloxane
(PHMS) and 1,3,5,7-tetramethyl 1,3,5,7-tetravinyl cyclotetrasiloxane (D4Vi) each 1g mixes in beaker, excusing from death
Vibration 10min, is sufficiently mixed both, and it is the methyl vinyl silicone coordination platinum of 3000ppm that one is instilled thereto to drip concentration
Continue to have children outside the state plan vibration 10min after catalyst, obtain SiOC precursor solutions.The cordierite of above-mentioned pretreatment is put into SiOC solution
Air blast through hole after middle immersion 30min, makes cordierite dielectric surface adhere to last layer SiOC precursor solutions, is then done at 60 DEG C
Dry 4-6h, prepares the sample that SiOC presomas are wrapped up in cordierite dielectric surface.
It is pyrolyzed under the argon gas for by above-mentioned cordierite sample being flowing, is first passed through 5min argon gas to drain furnace air, gas
Flow is 300sccm, continues to be passed through argon gas, and the heating rate for being first according to 1 DEG C/min rises to 440 DEG C of constant temperature 1h, then with 1 DEG C/
The heating rate of min rises to 800 DEG C, and constant temperature 1h cools to room temperature with the furnace；Then the crosslinked that will be pyrolyzed in argon gas is in air
Pyrolysis, 800 DEG C are risen to according to the heating rate of 1 DEG C/min from room temperature, after constant temperature 1h, cool to room temperature with the furnace, prepare surface
One layer of cordierite sample of SiOC of parcel：SiOC@cordierites.
Embodiment 2
Cordierite is cut into length：It is wide：Height=10mm：10mm：5mm, in the mixed solution that acetone/ethanol volume ratio is 3
After immersion 4h, 4h is dried at 60 DEG C；Then dried cordierite is placed in the HNO that concentration is 1mol/L3Soaked in solution
4h, after being rinsed repeatedly with distilled water, it is standby at 100 DEG C to dry 12h.It is 1 according to mass ratio：1 weighs hydrogen containing siloxane
(PHMS) and 1,3,5,7-tetramethyl 1,3,5,7-tetravinyl cyclotetrasiloxane (D4Vi) mix in beaker, excusing from death vibration
10min, is sufficiently mixed both, one is instilled thereto and drips continuation excusing from death vibration after methyl vinyl silicone coordination platinum catalyst
10min, obtains SiOC precursor solutions.The cordierite of above-mentioned pretreatment is put into air blast after soaking 30min in SiOC solution to lead to
Hole, makes cordierite dielectric surface adhere to last layer SiOC precursor solutions, then dries 4-6h at 60 DEG C, prepares blue or green in violet
Stone dielectric surface wraps up the sample of SiOC presomas.
100ml distilled water and 30ml absolute ethyl alcohols are taken in 250ml beakers, is with concentration after room temperature magnetic agitation 10min
The NaOH solution of 0.1mol/L adjusts the PH ≈ 9 of ethanol water, and the ethanol water that will be obtained is transferred to 250ml four-hole boiling flasks
In；The butyl titanate ethanol solution that 10ml mass fractions are 4%, the stirring reaction at 40 DEG C are added toward four-hole boiling flask
40min, the titania gel stablized；Successively toward addition 0.2g dodecyl sodium sulfates (emulsifying agent) in four-hole boiling flask,
It is passed through protective gas N2, 5ml styrene and 0.2g ammonium persulfates (initiator) are added, then the isothermal reaction 8h at 75 DEG C,
Obtain polystyrene microsphere (PS) emulsion of the homogeneous monodispersity of size structure.It is demulsified with the NaOH solution that concentration is 5%, to body
System is filtered, is washed, 60 DEG C to dry 24h standby.
Weigh hydrogen containing siloxane (PHMS) and 1,3,5,7- tetramethyl -1,3,5,7- tetravinyl cyclotetrasiloxanes
(D4Vi) in 8ml beakers, excusing from death vibration 10min is sufficiently mixed both to each 1g, is 3000ppm to concentration is instilled in beaker
Methyl vinyl silicone coordination platinum catalyst one drip, continue ultrasonic vibration 10min, obtain SiOC precursor solutions；Forward
Polystyrene microsphere (PS) the ultrasonic disperse 2h afterwards that 0.1g is added in liquid solution is driven, the PS suspension of polymolecularity is obtained.Will be upper
State and be transferred in PS suspension by the cordierite sample for pre-processing, after dipping 4h, air blast through hole after taking-up is subsequently placed in 50 DEG C
Lower constant temperature 4h, obtains composite crosslinking body.
Complex crosslinked is pyrolyzed under the argon gas of flowing, is first passed through 5min argon gas to drain furnace air, throughput
It is 300sccm, continues to be passed through argon gas, the heating rate for being first according to 1 DEG C/min rises to 440 DEG C of constant temperature 1h, then with 1 DEG C/min's
Heating rate rises to 800 DEG C, and constant temperature 1h cools to room temperature with the furnace；Then the crosslinked that will be pyrolyzed in argon gas is warm in atmosphere
Solution, 800 DEG C are risen to according to the heating rate of 1 DEG C/min from room temperature, after constant temperature 1h, cool to room temperature with the furnace, obtain inner surface tool
There is the cordierite of nano micropore structure.
Embodiment 3
Preparation, the SiOC forerunner of the pre-treatment of cordierite, surface SiOC presomas parcel and PS microballoons in the present embodiment
The preparation of liquid solution with embodiment 2, unlike：To ultrasonic disperse after the PS microballoons that 0.4g is added in SiOC precursor solutions
2h, obtains the PS suspension of polymolecularity.The above-mentioned cordierite sample by pretreatment is transferred in PS suspension, 4h is impregnated
Afterwards, air blast through hole after taking-up, constant temperature 4h at being subsequently placed in 50 DEG C obtains composite crosslinking body.
Complex crosslinked is first pyrolyzed under the argon gas of flowing, passes first into 5min argon gas to drain furnace air, gas
Flow is 300sccm, continues to be passed through argon gas, and the heating rate for being first according to 1 DEG C/min rises to 440 DEG C of constant temperature 1h, then with 1 DEG C/
The heating rate of min rises to 800 DEG C, and constant temperature 1h cools to room temperature with the furnace；Then the crosslinked that will be pyrolyzed in argon gas is in air
Middle pyrolysis, the crosslinked of pyrolysis is placed in Muffle furnace, and 800 DEG C, constant temperature 1h are risen to from room temperature according to the heating rate of 1 DEG C/min
Afterwards, room temperature is cooled to the furnace, obtaining inner surface has the cordierite of nano micropore structure.
Embodiment 4
Preparation, the SiOC presomas at the preceding place of cordierite, surface SiOC presomas parcel and PS microballoons in the present embodiment
The preparation of solution with embodiment 2, unlike：To ultrasonic disperse 2h after the PS microballoons that 0.8g is added in SiOC precursor solutions,
Obtain the PS suspension of polymolecularity.The above-mentioned cordierite sample by pretreatment is transferred in PS suspension, after dipping 4h,
Air blast through hole after taking-up, constant temperature 4h at being subsequently placed in 50 DEG C, obtains composite crosslinking body.
Complex crosslinked is first pyrolyzed under the argon gas of flowing, passes first into 5min argon gas to drain furnace air, gas
Flow is 300sccm, continues to be passed through argon gas, and the heating rate for being first according to 1 DEG C/min rises to 440 DEG C of constant temperature 1h, then with 1 DEG C/
The heating rate of min rises to 800 DEG C, and constant temperature 1h cools to room temperature with the furnace；Then the crosslinked that will be pyrolyzed in argon gas is in air
Middle pyrolysis, the crosslinked of pyrolysis is placed in Muffle furnace, and 800 DEG C, constant temperature 1h are risen to from room temperature according to the heating rate of 1 DEG C/min
Afterwards, room temperature is cooled to the furnace, obtaining inner surface has the cordierite of nano micropore structure.
Embodiment 5
The preparation of the pre-treatment of cordierite, surface SiOC presomas parcel and PS microballoon emulsions is with implementation in the present embodiment
Example 2, unlike：PS microballoon emulsions are not demulsified, but SiOC presomas will be wrapped up by pre-treatment and surface
Cordierite sample and 100ml polystyrene microspheres (PS) emulsion liquid are transferred in centrifuge tube, rotating speed be 4000r/min under from
Heart 24h, obtains the complex of polystyrene microsphere (PS) and cordierite, and it is standby that the complex that will be obtained dries 72h at 60 DEG C.
Weigh methyl hydrogen polysiloxanes (PHMS) and 1,3,5,7- tetramethyl -1,3,5,7- tetravinyl cyclotetrasiloxanes
(D4Vi) in 8ml beakers, excusing from death vibration 10min is sufficiently mixed both to each 2g, is 3000ppm to concentration is instilled in beaker
Methyl vinyl silicone coordination platinum catalyst one drip, continue ultrasonic vibration 10min, obtain SiOC precursor solutions；Will be dry
Complex after dry is placed in SiOC precursor solutions, at room temperature through vavuum pump suction filtration 2h repeatedly, in emptying PS microballoons gap
Air, constant temperature 4h at sample then is placed in into 50 DEG C obtains the crosslinked of complex.
The crosslinked of complex is pyrolyzed under the argon gas of flowing, is first passed through 5min argon gas to drain furnace air, air-flow
It is 300sccm to measure, and continues to be passed through argon gas, and the heating rate for being first according to 1 DEG C/min rises to 440 DEG C of constant temperature 1h, then with 1 DEG C/min
Heating rate rise to 800 DEG C, constant temperature 1h cools to room temperature with the furnace；Then the crosslinked that will be pyrolyzed in argon gas is in atmosphere
Pyrolysis, the crosslinked of pyrolysis is placed in Muffle furnace, and 800 DEG C, constant temperature 1h are risen to from room temperature according to the heating rate of 1 DEG C/min
Afterwards, cool to room temperature with the furnace, after the sample after the completion of to sintering carries out through hole treatment, obtain inner surface have it is nano ordered
The cordierite of many hollow structures.
Exemplary description is done to the present invention above, it should explanation, do not departed from the situation of core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent of creative work equal
Fall into protection scope of the present invention.
Claims (5)
1. a kind of method for preparing the modified cordierite in surface, it is characterised in that have by modified cordierite dielectric surface
Nanoscale Hierarchical porosity structure, pore size distribution$ is more uniform, and pore diameter range concentrates on 100-150nm, enters as steps described below
OK：
Step 1, prepares polystyrene microsphere and the well mixed crosslinked colloidal sol of SiOC presomas, that is, weigh identical mass fraction
Hydrogen containing siloxane and 1,3,5,7- tetramethyl -1,3,5,7- tetravinyl cyclotetrasiloxanes are mixed, then thereto
Addition methyl vinyl silicone coordination platinum catalyst, then the polystyrene microsphere of 0.1-1g is added thereto to, it is uniformly dispersed i.e.
Can；
Step 2, makes cordierite dielectric surface parcel polystyrene microsphere and SiOC presomas well mixed using sol impregnation method
Crosslinked colloidal sol；
Step 3, the composite crosslinking body prepared in step 2 is pyrolyzed, and obtaining surface has the violet of nanometer porous structure blue or green
Stone, is pyrolyzed in inert environments first：700 are warming up to from 20-25 DEG C of room temperature according to the programming rate of 1-2 DEG C/min~
900 DEG C, then 1-2h of constant temperature drops to 20-25 DEG C of room temperature with the cooling rate of 3~6 DEG C/min in inert gas shielding, will
Composite crosslinking body after being pyrolyzed in atmosphere of inert gases, is pyrolyzed, according to the programming rate of 1-2 DEG C/min again in atmosphere
Be warming up to 700~900 DEG C from 20-25 DEG C of room temperature, constant temperature 1h, then with the cooling rate of 3~6 DEG C/min be down to room temperature 20-
25℃。
2. a kind of method for preparing the modified cordierite in surface according to claim 1, it is characterised in that in the step 1
In, selection ultrasonic disperse mode is disperseed to system；Polyphenyl second of the polystyrene microsphere from emulsion polymerization synthesis
Alkene microballoon, its particle diameter is 200nm, and favorable dispersibility；The coordination platinum catalyst is coordinated platinum from methyl vinyl silicone
Catalyst, platinum content is 3000ppm in methyl vinyl silicone coordination platinum catalyst, the catalyst charge be containing
1%-the 3% of hydrogen polysiloxanes and t etram-ethyltetravinylcyclotetrasiloxane gross mass, its chemical formula is as follows：
3. a kind of method for preparing the modified cordierite in surface according to claim 1, it is characterised in that in the step 2
In, when being impregnated, cordierite medium is impregnated in crosslinked colloidal sol, dip time at least 30min；Soaked
Before stain, selection is anticipated to cordierite dielectric surface：Cordierite is cut into length：It is wide：Height=8-10mm：8-10mm：
15-17mm, is put into the mixed solution that volume ratio acetone/ethanol is 3 and soaks 3-5h, is then placed in drying 2- in 60 DEG C of baking ovens
3h；By dried sample be soaked in concentration be 0.5-1mol/L aqueous solution of nitric acid in 3-5h, the sample after immersion spend from
Drying for standby in drying box is put into after sub- water cleaning；After the infusion has taken place, air blast through hole after taking-up, makes cordierite dielectric surface
The crosslinked colloidal sol of polystyrene and SiOC presomas in attachment, constant temperature 4h at being subsequently placed in 50 DEG C obtains cordierite, polyphenyl second
The composite crosslinking body of alkene microballoon and SiOC presomas.
4. a kind of method for preparing the modified cordierite in surface according to claim 3, it is characterised in that in the step 2
In, dip time is 2-4h.
5. a kind of method for preparing the modified cordierite in surface according to claim 1, it is characterised in that in the step 3
In, inert gas 4-6min is first passed through, throughput controls in 200-400sccm, after draining the air in stove, continues to be passed through inertia
Gas；The inert gas selects argon gas or helium.
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| CN1453072A (en) * | 2002-04-26 | 2003-11-05 | 中国石油化工股份有限公司 | Method of loading automobile tail gas purifying catalyst onto honeycomb carrier |
| CN101053838A (en) * | 2007-05-23 | 2007-10-17 | 中国科学院山西煤炭化学研究所 | Cordierite-base copper oxide/ gamma-aluminium oxide catalyst used for flue gas denitration and preparation method and application |
| CN101612575A (en) * | 2009-07-10 | 2009-12-30 | 天津大学 | Fe 2O 3And V 2O 5The use for diesel engine Catalysts and its preparation method of double activity component |
| CN102125855A (en) * | 2010-12-29 | 2011-07-20 | 天津大学 | SiOC porous ceramic supported La0.9K0.1CoO3 nano particle catalyst and preparation method |
| JP2012200660A (en) * | 2011-03-25 | 2012-10-22 | National Institute For Materials Science | Metal catalyst structure and method for producing the same |
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| CN101982234B (en) * | 2010-09-16 | 2012-09-05 | 中国石油天然气集团公司 | Three-dimensionally ordered macroporous gold-loaded catalyst for catalytic combustion with composite oxide as carrier |
| CN101992089B (en) * | 2010-10-29 | 2012-08-08 | 中国石油大学(北京) | Three-dimensional ordered porous-mesoporous iron-based perovskite oxide catalyst and preparation method thereof |
| CN102794175B (en) * | 2012-08-30 | 2014-07-30 | 北京工业大学 | Thermal-stability three-dimensional ordered macro-porous carbon smoke combustion catalyst and preparation method thereof |
| CN102836732A (en) * | 2012-09-14 | 2012-12-26 | 天津大学 | SiOC porous ceramics-loaded La0.9Sr0.1CoO3 nano particle catalyst prepared by fibre template method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1453072A (en) * | 2002-04-26 | 2003-11-05 | 中国石油化工股份有限公司 | Method of loading automobile tail gas purifying catalyst onto honeycomb carrier |
| CN101053838A (en) * | 2007-05-23 | 2007-10-17 | 中国科学院山西煤炭化学研究所 | Cordierite-base copper oxide/ gamma-aluminium oxide catalyst used for flue gas denitration and preparation method and application |
| CN101612575A (en) * | 2009-07-10 | 2009-12-30 | 天津大学 | Fe 2O 3And V 2O 5The use for diesel engine Catalysts and its preparation method of double activity component |
| CN102125855A (en) * | 2010-12-29 | 2011-07-20 | 天津大学 | SiOC porous ceramic supported La0.9K0.1CoO3 nano particle catalyst and preparation method |
| JP2012200660A (en) * | 2011-03-25 | 2012-10-22 | National Institute For Materials Science | Metal catalyst structure and method for producing the same |
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| Publication number | Publication date |
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| CN103433063B (en) | 2016-08-17 |
| CN105032458A (en) | 2015-11-11 |
| CN105032456A (en) | 2015-11-11 |
| CN105032456B (en) | 2018-06-26 |
| CN103433063A (en) | 2013-12-11 |
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