CN103601480A - Filter body for trapping carbon cigarette pellets of diesel engine and preparation method thereof - Google Patents
Filter body for trapping carbon cigarette pellets of diesel engine and preparation method thereof Download PDFInfo
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- CN103601480A CN103601480A CN201310563066.7A CN201310563066A CN103601480A CN 103601480 A CN103601480 A CN 103601480A CN 201310563066 A CN201310563066 A CN 201310563066A CN 103601480 A CN103601480 A CN 103601480A
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Abstract
The invention discloses a filter body for trapping carbon cigarette pellets of a diesel engine and a preparation method thereof. The preparation method comprises the following steps of uniformly mixing cordierite, silicon carbide and ultrafine mullite, adding auxiliary materials such as pore forming agent, binder, plasticizer and deionized water, mixing, pugging, molding, drying with microwaves, sealing holes through a special technology, and sintering at a high temperature, thus obtaining the filter body. The softening temperature of the prepared filter body is higher than or equal to 1510 DEG C, the filter body does not crack after being cooled or heated quickly for three times at 600 DEG C, and the filter body has strong physical and chemical properties, and is used for trapping carbon cigarette pellets of the diesel engine of a motor vehicle in a poor environment.
Description
Technical field
The present invention relates to the technical field of purifying vehicle exhaust, be specifically related to a kind of for diesel emission particulate trapping technique.
Background technology
Aggravation and CO along with Global Oil shortage of resources
2reduce discharging the increase of pressure, occur the situation of power train in vehicle application dieselization abroad.At present, in European car annual production, more than 40% adopted diesel motor, national up to more than 50% in France, Spain etc.Although compare with petrol motor, diesel engine is a kind of environmentally friendly engine, but compare with the gasoline car of assembling three-way catalyst, the pollution emission of the diesel vehicle that nitrogen oxide NOx and soot particulate (PM) be feature of take becomes and restricts its important factor of applying.Therefore, the diesel emission particulate filtering bodies of exploitation excellent performance becomes a difficult problem urgently to be resolved hurrily.At present, still there is the shortcoming that softening temperature is low, heat-shock resistance is not enough in the filtering bodies that adopts cordierite material to make, and adopt the filtering bodies of silicon carbide and mullite material also to have the problem that thermal expansivity is too high, causes industrial production and application difficult.
Chinese invention patent CN1915520A has reported and has adopted silicon carbide as main raw material(s), to prepare the technology of ceramic particle capturing device, but this technology is first to prepare fritter filter core, and then obtain finished product after assembled the firing that bond, therefore carrying out scale operation has larger difficulty.
Chinese invention patent CN102351523A has reported and has adopted the porous honeycomb industrial ceramics body that trichroite and silicon carbide mixture are matrix, its filtration efficiency>=95%, and working temperature>=1500 ℃, thermal expansivity is 1.2 * 10
-6/ ℃, but thermal shock resistance is not mentioned.
Chinese invention patent CN1501831A discloses a kind of ceramic honeycomb filter, and it is main component that this strainer be take trichroite and/or silicon carbide, and void content is 55-75%, and the thermal expansivity at 40-800 ℃ is 1.0 * 10
-6/ ℃ below, but high thermal resistance and heat-shock resistance are not mentioned.
Summary of the invention
The object of the present invention is to provide a kind of filtering bodies for diesel emission particulate trapping and preparation method thereof, low to reduce production costs, high thermal resistance and the heat-shock resistance of raising product, adapt to large-scale industrial application.
In order to solve above technical problem, the concrete technical scheme that the present invention adopts is as follows:
A preparation method for the filtering bodies trapping for diesel emission particulate, is characterized in that comprising the following steps:
Trichroite and silicon carbide that step 1 is 3:1 by weight percent evenly mix, and obtain mixture I; Get the Ultrafine Mullite of 63-66% weight percent mixture I and 2-5% weight percent, after mixing, obtain mixtures II;
Step 2, the deionized water that the glycerine that the methylcellulose gum of making pore-forming material, 1-2% weight percent toward the activity charcoal powder that adds 2-3% weight percent in described mixtures II is made binding agent, 2-4% weight percent is made softening agent and 23-27% weight percent carries out wet-mixed and obtains mixtures III;
Step 3, puts into the mixing 2-4 hour of vacuum deairing machine by mixtures III, forms plasticity moulded pottery not yet put in a kiln to bake;
Step 4, puts into extrusion machine by described plasticity moulded pottery not yet put in a kiln to bake, forms the cellular moulded pottery not yet put in a kiln to bake of 64 hole/square centimeters under the guiding of mould;
Step 5, puts into microwave drying oven drying and shaping by described cellular moulded pottery not yet put in a kiln to bake, then intersects sealing of hole and obtain filtering bodies moulded pottery not yet put in a kiln to bake;
Step 6, puts into high temperature sintering furnace by described filtering bodies moulded pottery not yet put in a kiln to bake, is heated to 1450 ℃, and is incubated 48 hours with the temperature rise rates of 5 ℃/min, then naturally cools to 100 ℃ and is prepared into filtering bodies.
Described Ultrafine Mullite size is 0.5-2 μ m.
The filtering bodies that the preparation method of a kind of filtering bodies for diesel emission particulate trapping described in utilizing makes, is characterized in that: described filtering bodies is to take trichroite, silicon carbide and Ultrafine Mullite as main raw-material porous honeycomb carrier; Softening temperature >=1510 ℃ of filtering bodies, the cold and hot sudden turn of events is not ftractureed for 3 times at 600 ℃.
The present invention has beneficial effect.The present invention is applied to porous honeycomb carrier by Ultrafine Mullite, has suppressed the high temperature creep of trichroite, has increased the quantity of honeycomb substrate internal tiny crack, makes honeycomb substrate have good high thermal resistance and heat-shock resistance.Softening temperature >=1510 ℃ of the filtering bodies making, the cold and hot sudden turn of events is not ftractureed for 3 times at 600 ℃, makes it in severe environment for use, have better work-ing life.
Embodiment
Below in conjunction with embodiment, technical scheme of the present invention is described in further details.
The trichroite and the silicon carbide that by weight percent, are 3:1 evenly mix, and obtain mixture I
Comparative example
Get the mixture I of 68% weight percent, add wherein the activity charcoal powder of 2% weight percent, the glycerine of the methylcellulose gum of 1% weight percent, 2% weight percent and the deionized water of 27% weight percent carry out wet-mixed, then put into vacuum deairing machine mixing 2 hours, form plasticity moulded pottery not yet put in a kiln to bake.Plasticity moulded pottery not yet put in a kiln to bake is put into extrusion machine, under the guiding of mould, form the cellular moulded pottery not yet put in a kiln to bake of 64 hole/square centimeters.Again cellular moulded pottery not yet put in a kiln to bake is put into microwave drying oven drying and shaping, then intersect sealing of hole.Finally put into high temperature sintering furnace, with the temperature rise rates of 5 ℃/min, be heated to 1450 ℃, and be incubated 48 hours, then naturally cool to 100 ℃ and obtain finished product.
Embodiment 1:
Get the mixture I of 63% weight percent, the particle diameter that adds wherein 5% weight percent is the Ultrafine Mullite of 0.5 μ m, evenly mix, add again the activity charcoal powder of 2% weight percent, the glycerine of the methylcellulose gum of 1% weight percent, 2% weight percent and the deionized water of 27% weight percent carry out wet-mixed, then put into vacuum deairing machine mixing 2 hours, form plasticity moulded pottery not yet put in a kiln to bake.Plasticity moulded pottery not yet put in a kiln to bake is put into extrusion machine, under the guiding of mould, form the cellular moulded pottery not yet put in a kiln to bake of 64 hole/square centimeters.Again cellular moulded pottery not yet put in a kiln to bake is put into microwave drying oven drying and shaping, then intersect sealing of hole.Finally put into high temperature sintering furnace, with the temperature rise rates of 5 ℃/min, be heated to 1450 ℃, and be incubated 48 hours, then naturally cool to 100 ℃ and obtain finished product.
Embodiment 2:
Get the mixture I of 64% weight percent, the particle diameter that adds wherein 4% weight percent is the Ultrafine Mullite of 1 μ m, evenly mixes; Add again the activity charcoal powder of 3% weight percent, the glycerine of the methylcellulose gum of 2% weight percent, 4% weight percent and the deionized water of 23% weight percent carry out wet-mixed, then put into vacuum deairing machine mixing 4 hours, form plasticity moulded pottery not yet put in a kiln to bake.Plasticity moulded pottery not yet put in a kiln to bake is put into extrusion machine, under the guiding of mould, form the cellular moulded pottery not yet put in a kiln to bake of 64 hole/square centimeters.Again cellular moulded pottery not yet put in a kiln to bake is put into microwave drying oven drying and shaping, then intersect sealing of hole.Finally put into high temperature sintering furnace, with the temperature rise rates of 5 ℃/min, be heated to 1450 ℃, and be incubated 48 hours, then naturally cool to 100 ℃ and obtain finished product.
Embodiment 3:
Get the mixture I of 65% weight percent, the particle diameter that adds wherein 3% weight percent is the Ultrafine Mullite of 1.5 μ m, evenly mixes; Add again the activity charcoal powder of 2% weight percent, the glycerine of the methylcellulose gum of 1% weight percent, 2% weight percent and the deionized water of 27% weight percent carry out wet-mixed, then put into vacuum deairing machine mixing 2 hours, form plasticity moulded pottery not yet put in a kiln to bake.Plasticity moulded pottery not yet put in a kiln to bake is put into extrusion machine, under the guiding of mould, form the cellular moulded pottery not yet put in a kiln to bake of 64 hole/square centimeters.Again cellular moulded pottery not yet put in a kiln to bake is put into microwave drying oven drying and shaping, then intersect sealing of hole.Finally put into high temperature sintering furnace, with the temperature rise rates of 5 ℃/min, be heated to 1450 ℃, and be incubated 48 hours, then naturally cool to 100 ℃ and obtain finished product.
Embodiment 4:
Get the mixture I of 66% weight percent, the particle diameter that adds wherein 2% weight percent is the Ultrafine Mullite of 2 μ m, evenly mixes; Add again the activity charcoal powder of 3% weight percent, the glycerine of the methylcellulose gum of 2% weight percent, 4% weight percent and the deionized water of 23% weight percent carry out wet-mixed, then put into vacuum deairing machine mixing 4 hours, form plasticity moulded pottery not yet put in a kiln to bake.Plasticity moulded pottery not yet put in a kiln to bake is put into extrusion machine, under the guiding of mould, form the cellular moulded pottery not yet put in a kiln to bake of 64 hole/square centimeters.Again cellular moulded pottery not yet put in a kiln to bake is put into microwave drying oven drying and shaping, then intersect sealing of hole.Finally put into high temperature sintering furnace, with the temperature rise rates of 5 ℃/min, be heated to 1450 ℃, and be incubated 48 hours, then naturally cool to 100 ℃ and obtain finished product.
By comparative example and the resulting finished product honeycomb substrate of embodiment 1-4, be that filtering bodies is tested, experimental result is as shown in table 1.
Table 1 utilizes softening temperature and the heat-shock resistance test-results of the ceramic honey comb that the inventive method makes
Through testing and verification, adding of Ultrafine Mullite greatly improves the physical and chemical performance of filtering bodies, can resistance to 1510 ℃ of above high temperature, and the cold and hot sudden turn of events is not ftractureed for 3 times at 600 ℃, is suitable for using under severe automotive environment.
The foregoing is only preferred embodiments of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a preparation method for the filtering bodies trapping for diesel emission particulate, is characterized in that comprising the following steps:
Trichroite and silicon carbide that step 1 is 3:1 by weight percent evenly mix, and obtain mixture I; Get the Ultrafine Mullite of 63-66% weight percent mixture I and 2-5% weight percent, after mixing, obtain mixtures II;
Step 2, the deionized water that the glycerine that the methylcellulose gum of making pore-forming material, 1-2% weight percent toward the activity charcoal powder that adds 2-3% weight percent in described mixtures II is made binding agent, 2-4% weight percent is made softening agent and 23-27% weight percent carries out wet-mixed and obtains mixtures III;
Step 3, puts into the mixing 2-4 hour of vacuum deairing machine by mixtures III, forms plasticity moulded pottery not yet put in a kiln to bake;
Step 4, puts into extrusion machine by described plasticity moulded pottery not yet put in a kiln to bake, forms the cellular moulded pottery not yet put in a kiln to bake of 64 hole/square centimeters under the guiding of mould;
Step 5, puts into microwave drying oven drying and shaping by described cellular moulded pottery not yet put in a kiln to bake, then intersects sealing of hole and obtain filtering bodies moulded pottery not yet put in a kiln to bake;
Step 6, puts into high temperature sintering furnace by described filtering bodies moulded pottery not yet put in a kiln to bake, is heated to 1450 ℃, and is incubated 48 hours with the temperature rise rates of 5 ℃/min, then naturally cools to 100 ℃ and is prepared into filtering bodies.
2. the preparation method of a kind of filtering bodies for diesel emission particulate trapping as claimed in claim 1, is characterized in that: described Ultrafine Mullite size is 0.5-2 μ m.
3. the filtering bodies of utilizing the preparation method of a kind of filtering bodies for diesel emission particulate trapping as claimed in claim 1 or 2 to make, is characterized in that: described filtering bodies is to take trichroite, silicon carbide and Ultrafine Mullite as main raw-material porous honeycomb carrier; Softening temperature >=1510 ℃ of filtering bodies, the cold and hot sudden turn of events is not ftractureed for 3 times at 600 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310563066.7A CN103601480A (en) | 2013-11-13 | 2013-11-13 | Filter body for trapping carbon cigarette pellets of diesel engine and preparation method thereof |
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| CN201310563066.7A CN103601480A (en) | 2013-11-13 | 2013-11-13 | Filter body for trapping carbon cigarette pellets of diesel engine and preparation method thereof |
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| CN103601480A true CN103601480A (en) | 2014-02-26 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481367A (en) * | 2015-11-24 | 2016-04-13 | 凯龙蓝烽新材料科技有限公司 | Filter for trapping diesel engine soot particles, and making method thereof |
| CN106588066A (en) * | 2016-11-28 | 2017-04-26 | 凯龙蓝烽新材料科技有限公司 | Cordierite wall-flow honeycomb ceramic filter body used for capturing diesel engine soot particles and preparation method thereof |
| CN107586124A (en) * | 2017-09-06 | 2018-01-16 | 郑州大学 | High-strength light composite ceramic material and preparation method thereof |
| CN107619267A (en) * | 2017-10-24 | 2018-01-23 | 郑州大学 | A kind of SiC reinforcement cordierite-mullite ceramic composite and preparation method thereof |
| CN107983339A (en) * | 2017-11-20 | 2018-05-04 | 重庆大学 | A kind of preparation method of the soot reforming catalyst with hierarchical porous structure |
| CN109704739A (en) * | 2018-12-25 | 2019-05-03 | 宜兴市锦龙陶瓷有限公司 | A kind of preparation method of industry denitration honeycomb ceramic carrier |
| CN115925439A (en) * | 2022-12-06 | 2023-04-07 | 凯龙蓝烽新材料科技有限公司 | Silicon carbide particle trap and preparation method thereof |
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| CN101406782A (en) * | 2008-11-06 | 2009-04-15 | 山东理工大学 | Method for producing silicon carbide porous ceramic filtering element and extrusion apparatus |
| CN102351523A (en) * | 2011-06-07 | 2012-02-15 | 张志刚 | Filter used for filtering soot particulates in diesel engine and preparation method thereof |
| CN102442831A (en) * | 2010-10-08 | 2012-05-09 | 华南理工大学 | Preparation method of high-temperature smoke filter ceramic material with high thermal shock resistance |
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| CN101406782A (en) * | 2008-11-06 | 2009-04-15 | 山东理工大学 | Method for producing silicon carbide porous ceramic filtering element and extrusion apparatus |
| CN102442831A (en) * | 2010-10-08 | 2012-05-09 | 华南理工大学 | Preparation method of high-temperature smoke filter ceramic material with high thermal shock resistance |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481367A (en) * | 2015-11-24 | 2016-04-13 | 凯龙蓝烽新材料科技有限公司 | Filter for trapping diesel engine soot particles, and making method thereof |
| CN106588066A (en) * | 2016-11-28 | 2017-04-26 | 凯龙蓝烽新材料科技有限公司 | Cordierite wall-flow honeycomb ceramic filter body used for capturing diesel engine soot particles and preparation method thereof |
| CN107586124A (en) * | 2017-09-06 | 2018-01-16 | 郑州大学 | High-strength light composite ceramic material and preparation method thereof |
| CN107619267A (en) * | 2017-10-24 | 2018-01-23 | 郑州大学 | A kind of SiC reinforcement cordierite-mullite ceramic composite and preparation method thereof |
| CN107983339A (en) * | 2017-11-20 | 2018-05-04 | 重庆大学 | A kind of preparation method of the soot reforming catalyst with hierarchical porous structure |
| CN109704739A (en) * | 2018-12-25 | 2019-05-03 | 宜兴市锦龙陶瓷有限公司 | A kind of preparation method of industry denitration honeycomb ceramic carrier |
| CN115925439A (en) * | 2022-12-06 | 2023-04-07 | 凯龙蓝烽新材料科技有限公司 | Silicon carbide particle trap and preparation method thereof |
| CN115925439B (en) * | 2022-12-06 | 2024-01-23 | 凯龙蓝烽新材料科技有限公司 | Silicon carbide particle catcher and preparation method thereof |
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Application publication date: 20140226 |