CN100542674C - Honeycomb molded body - Google Patents
Honeycomb molded body Download PDFInfo
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- CN100542674C CN100542674C CNB2007101359030A CN200710135903A CN100542674C CN 100542674 C CN100542674 C CN 100542674C CN B2007101359030 A CNB2007101359030 A CN B2007101359030A CN 200710135903 A CN200710135903 A CN 200710135903A CN 100542674 C CN100542674 C CN 100542674C
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- molded body
- honeycomb molded
- hole
- filter
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Abstract
The object of the present invention is to provide a kind of honeycomb molded body that is used for filter, this structure can a large amount of catalyst of load, and can be suppressed at the increase of the pressure loss when capturing particle, have higher granule capturing ability simultaneously, and can carry out regenerative process and cleaning harmful gas process effectively.Honeycomb molded body of the present invention is the cylindricality honeycomb molded body, it mainly is made of inorfil, wherein length direction is arranged with a plurality of through holes of being separated by partition wall in parallel, it is characterized in that described honeycomb molded body is by having the unit of through hole so that described through hole stacked the obtaining of mode stacked on top of each other along its length with a plurality of.
Description
The application divides an application, and the international application no of its original application is PCT/JP2004/008129, and the China national application number is 200480001072.2, and the applying date is on June 10th, 2004, and denomination of invention is " honeycomb molded body ".
Technical field
The present invention relates to a kind of honeycomb molded body, it is used for removing from the particle of the waste gas of discharging such as internal combustion engines such as diesel engines etc.
Background technology
From the waste gas of discharging, contain such as particles such as coal smokes and constituted problem environment and human body harmful such as the internal combustion engine of vehicle such as automobile, truck and building machinery etc.In the past,, proposed various filters, and also proposed to have the filter of alveolate texture in order to capture particle and the purifying exhaust gas in the exhaust.
Fig. 4 shows a kind of stereogram with filter of this alveolate texture.
This honeycomb filter 60 is the honeycomb molded bodies that are made of carborundum etc., in the honeycomb filter 60, by the sealing material layer 64 that plays a role as binding agent a plurality of quadrangular shape porous ceramic members 70 are combined with formation ceramic component 65, and around this ceramic component 65, also be formed with sealing material layer 63.
Fig. 5 (a) is the stereogram that schematically shows the porous ceramic member of the honeycomb filter shown in the pie graph 4, cuts open the profile of getting and Fig. 5 (b) is the porous ceramic member B-B along the line shown in Fig. 5 (a).
Porous ceramic member 70 has alveolate texture, and wherein partition wall 73 spaced apart from each other is used as filter between a large amount of through holes 71 that length direction is be arranged in parallel.
In other words, shown in Fig. 5 (b), for each through hole 71 that in porous ceramic member 70, forms, any end of exhaust inflow side or exhaust outflow side is by encapsulant 72 sealings, thereby make the exhaust that enters a through hole 71 to discharge from another through hole 71 through after separating the partition wall 73 of through hole 71.
In addition, the sealing material layer 63 that is arranged on periphery is based on when being installed in honeycomb filter 60 in the exhaust channel of internal combustion engine, prevents from that exhaust from spilling from the peripheral part of ceramic component 65 to be provided with.
When the honeycomb filter 60 that will have said structure was installed in the exhaust channel of internal combustion engine, the particle from the exhaust that internal combustion engine is discharged was separated wall 73 and captures through this honeycomb filter 60 time, thus purifying exhaust gas.
For filter with alveolate texture, except with the structure of a plurality of porous ceramic members in conjunction with bunchy, also known following filter (for example, with reference to patent documentation 1,2,3), that is, form the filter of the single bulk ceramics body of making by cordierite etc. on the whole; The inorfil that use is made of aluminium oxide, silica, mullite etc., the honeycomb filter that forms by extrusion molding; And inorganic board or the metallic plate of being made by the inorfil of the system of copying carried out the wavy honeycomb filter of being processed into web-like and forming.
Honeycomb filter with said structure has good hear resistance, and is easy to burning thereon and removes degranulation (below, be called regenerative process) etc.; Therefore be used to various oversize vehicles, be mounted with the vehicle of diesel engine etc.
In addition, also known such filter, it captures the particle in the exhaust, and can purify such as harmful exhaust gas such as CO, HC, NOx.In these filters, the catalyst that is used for purifying exhaust gas is attached to the part (through hole etc.) as filter.
Thereon in the honeycomb molded body of attached catalyst, because particle deposition on catalyst, therefore reduces the required activation energy of particle burning by catalyst, thereby even also can make particle burning at low temperature.Therefore, increased reflecting point by the decentralization that improves catalyst in the past, thereby make particle, improved the purifying property of exhaust at low-temperature burning.
In the above-mentioned filter that uses catalyst, regenerate and purification process by using following two kinds of methods.
In first method, be continuous to the purification of pernicious gas in the exhaust, but before the particle packing that captures reaches certain adhesion amount, do not carry out regenerative process.After reaching certain adhesion amount, carry out regenerative process removing degranulation, and capture particle once more.This method is exactly repeatedly to repeat this process.
In second method, be continuous to the purification of pernicious gas in the exhaust, it also is continuous that the burning of particle is removed, thereby makes particle be burnt constantly under the situation that does not have deposition.
For by using said method under lower pressure loss, can effectively react, preferably be increased in the reflecting point of particle and catalyst; Therefore, can consider to increase the specific area of honeycomb molded body.
But, under the situation that adopts the method for specific area that enlarges honeycomb molded body by the perforation hole count that increases the per unit sectional area, because the sectional area of the through hole of honeycomb molded body is less, so exhaust is difficult to flow, make the pressure loss increase, thereby practical method can not be provided.
Proposed another kind of effective method, the density of wall portion that wherein reduce to constitute filter to be increasing the porosity, thereby has a large amount of open pores; Therefore think,, and particle is contacted with catalyst in the wall portion even the part of the pore in filter wall portion deep layer also captures particle.
But, when said method is used for above-mentioned filter, the intensity step-down of filter.Particularly in patent documentation 1 under the situation of disclosed filter, it is very low that the intensity of filter becomes.For this reason, when the particle that captured (below be called regenerative process) is removed in burning, such filter is along with the combustion process of particle, and may stand the big temperature difference on the length direction of filter, thus because thermal stress subsequently and in filter, cause damage such as the crack.Consequently, above-mentioned filter has lost filtering function.
In addition, regenerate and purification process in order to effectively utilize the exhaust that engine generates, expectation with filter be installed in engine under; Yet this installing space is very limited.For this reason, filter need be made complicated shape; Yet, existing filter is difficult to make complicated shape.
In addition, the lamination filter is also disclosed; Yet these filters strengthen toughness by add ceramic fibre in ceramic material (cup soil), do not realize high porosity (with reference to patent documentation 4).
Patent documentation 1:JP-A06-182228 (1994)
Patent documentation 2:JP-A04-2673 (1992)
Patent documentation 3:JP-A2001-252529
Patent documentation 4:JP-A08-12460 (1996)
Summary of the invention
The present invention finishes in order to address the above problem, its purpose is to provide a kind of honeycomb molded body, this structure can carry a large amount of catalyst, and can be suppressed at the increase of the pressure loss when capturing particle, can be used for the regenerative process and/or the purification process of pernicious gas simultaneously effectively.
According to a first aspect of the invention, a kind of cylindricality honeycomb molded body is provided, this structure mainly is made of inorfil, a large amount of through holes be arranged in parallel at length direction across partition wall, it is characterized in that, in the inorfil of described this honeycomb molded body of formation, and compare along the face parallel with the formation direction of through hole, more along the inorfil of the planar orientation vertical with the formation direction of through hole.
In addition, in a first aspect of the present invention, " with compare along the face parallel with the formation direction of through hole, more along the inorfil of the planar orientation vertical with the formation direction of through hole " the expression meaning as follows.Promptly, as shown in Figure 8, based on the cross section (the wall portion that separates through hole) of observing honeycomb molded body, suppose: will be that the inorfil 101 that is orientated 0～45 ℃ is defined as " along the inorfil of the direction orientation parallel with the formation direction of through hole " with the direction angulation α of inorfil 101 as the formation direction of through hole, and suppose: with the formation direction and the angle α that direction became of inorfil 102 of through hole is that 45～90 ℃ of inorfils that are orientated like that 102 are defined as " along the inorfil of the direction orientation vertical with the formation direction of through hole ", and then the inorfil along the vertical direction orientation is more than the inorfil that is orientated along parallel direction.In addition, can wait to determine the orientation of inorfil on alveolate texture body section (the wall portion that separates through hole) by using SEM (SEM).
According to a second aspect of the invention, a kind of cylindricality honeycomb molded body is provided, and this structure mainly is made of inorfil, and a large amount of through holes be arranged in parallel at length direction across partition wall, it is characterized in that, press through hole mode lamination stacked on top of each other on the length direction.
To the honeycomb molded body of first and second aspects according to the present invention be described below.
The honeycomb molded body of the present invention first and second aspects has following structure, and a large amount of (or a plurality of) through holes wherein be arranged in parallel on the length direction.These through holes can all not have the common through hole of sealing to form by two ends, perhaps can comprise the through hole that any end seals (below be called bottom outlet is arranged) yet.
At above-mentioned through hole is under the situation of two ends less than the common through hole of sealing, and this honeycomb molded body is not brought into play as the function that captures the particulate filtration device; But by containing attached catalyst on the part of through hole, this honeycomb molded body performance is as the function of the purifier of pernicious gas.
On the contrary, at above-mentioned a large amount of through holes is under the sealed situation that bottom outlet is arranged of any end, this honeycomb molded body performance is as the function that captures the particulate filtration device, and, can bring into play function as the purifier that captures particulate filtration device and pernicious gas when thereon further during attached catalyst.
Below mainly the honeycomb molded body of performance as the purifier that captures particulate filtration device and pernicious gas described; Yet as mentioned above, first and second honeycomb molded bodies can perhaps can be used as the purifier performance function of pernicious gas simply as filter performance function.
Because the honeycomb molded body of the present invention first and second aspects uses inorfil as main constituent material, therefore can realize having the honeycomb molded body of the high porosity of sufficient intensity.
Wherein, so-called " using inorfil as main constituent material " is meant that the over half of its constituent material is made of the material that remains with the inorfil shape, and second half of constituent material is made of inorganic binder, organic binder bond etc.
In addition, in the inorfil of the honeycomb molded body that constitutes first aspect present invention, and compare along the face parallel with the formation direction of through hole, more along the inorfil of the planar orientation vertical with the formation direction of through hole.Thereby owing to allow exhaust easily to pass through wall portion, so can reduce the pressure loss at initial stage, pars intramuralis becomes easy to the in-depth filtration of particle simultaneously; Therefore, can be suppressed on the wall portion surface and form filter cake layer, and be suppressed at the increase of the pressure loss when capturing particle.In addition because before forming honeycomb molded body, can be with catalyst attached to as on the inorfil of constituent material, therefore can be by this way with catalyst attached on the honeycomb molded body, so that it disperses more equably.As a result, the honeycomb molded body of first aspect present invention can increase the purification function to pernicious gas.
With catalyst attached to the situation on the inorfil under, with compare along forming the nearly parallel direction of direction with through hole, along to form the ratio of fiber of the vertical planar orientation of direction big with through hole, therefore the exhaust ratio with the differently-oriented directivity PARALLEL FLOW of inorfil increases; Therefore, particle and the chance that contacts attached to the catalyst on the inorfil (probability) increase, thus burning particles easily.
And, can realize less thermal capacity because of high porosity, therefore the stage is heated to its active temperature (being used for regeneration and purification process) with catalyst to the exhaust heat that can distribute from internal combustion engine by use in early days.Particularly, thus this structure is particularly favourable when effectively utilizing from herein exhaust heat under filter being placed on engine.
And, in the honeycomb molded body aspect first and second, on the inorfil that before its moulding, catalyst can be applied to, therefore can make catalyst so that dispersity is attached thereto more equably as constituent material according to the present invention.Because these structures have stepped construction in the longitudinal direction, when therefore forming this stepped construction, can be according to the purposes independent assortment of structure catalyst decentralization and catalyst type with respect to length direction.Therefore, the honeycomb molded body of first and second aspects can improve the purification function of regenerative process and pernicious gas effectively according to the present invention.
Under situation about catalyst being placed under the engine, filter space is very limited, and needs complicated filter shape; Yet, because the honeycomb molded body of second aspect present invention has in the stacked structure of length direction, therefore can easily address these problems, and waste material not.
In addition, when carrying out regenerative process, along with the combustion process of particle, on the length direction of filter, produce the bigger temperature difference, and on filter, produce bigger thermal stress subsequently; Yet the honeycomb molded body of second aspect present invention is owing to the stepped construction that has along its length, even therefore this temperature difference is applied on the whole filter, the temperature difference that is applied on the whole filter is also less, and thermal stress subsequently also becomes less.Therefore, this honeycomb molded body becomes and is difficult for suffering damage.Particularly, although above-mentioned filter with complicated shape is a little less than becoming with respect to thermal stress in shape, even the honeycomb molded body of second aspect present invention is because above-mentioned reason also is difficult for producing the infringement such as the crack when having complicated shape.
In addition, in the honeycomb molded body of second aspect present invention, can be by alternately or stacked randomly with different units, and can be easily on the surface of the wall portion of honeycomb molded body, form concavo-convex.Like this, can increase filter area, and therefore be reduced in the pressure loss when capturing particle by being formed on the lip-deep concavo-convex of wall portion.In addition, it is believed that these concavo-convex exhaust streams that can make form turbulent flow, thereby can reduce the temperature difference in filter, with the infringements such as crack that prevent to produce owing to thermal stress.In addition, for a first aspect of the present invention, when through hole has stepped construction, also can obtain and second aspect present invention identical functions and effect.
In addition, third aspect present invention relates to the manufacture method of honeycomb molded body, it is characterized in that, will mainly be made of inorfil and to be formed with the flaggy of through hole therein folded, makes above-mentioned through hole overlapping.
The manufacture method of the honeycomb molded body by using the invention described above third aspect can be made the honeycomb molded body of the present invention first and second aspects well.
In the honeycomb molded body of first aspect present invention, along with the inorfil of the vertical planar orientation of the formation direction of through hole than many along the inorfil of the planar orientation parallel with the formation direction of through hole, if so improve the porosity, can make more catalyst attached to (inside that comprises honeycomb molded body) on the honeycomb molded body, thereby can improve the purification function that is used for exhaust; Therefore, can reduce the initial pressure loss, can pass through pars intramuralis in-depth filtration particle easily simultaneously, prevent the increase of the pressure loss when forming filter cake layer on the surface of wall portion and prevent at the capture particle.In addition, the honeycomb molded body of first aspect present invention is owing to using inorfil as its constituent material, even therefore also can keep enough intensity when the porosity increases.
When along with through hole form direction near the ratio of the inorfil of vertical direction orientation along forming the ratio of fiber of the parallel planar orientation of direction when big with through hole, the exhaust ratio that flows abreast with the orientation of inorfil increases, thereby make particle and the chance that contacts attached to the catalyst on the inorfil increase, thus burning particles easily.
In addition, higher by making the porosity, thermal capacity diminishes, thereby can easily make the temperature of honeycomb molded body be increased to the activity of such catalysts temperature by the exhaust heat of utilizing engine to distribute.Therefore, exhaust heat be can effectively utilize and regeneration and purification process are used for.
In addition, in the honeycomb molded body of second aspect present invention, owing to use inorfil, therefore can realize having the honeycomb molded body of the high porosity of sufficient intensity as the main composition material.Therefore, can reduce the pressure loss, particle increases with the chance that contacts attached to the catalyst on the inorfil simultaneously, easily burning particles.And then because thermal capacity is little, therefore by utilizing the exhaust heat of distributing from internal combustion engine, the stage is heated to its active temperature (being used for regeneration and purification process) with catalyst in early days.Particularly, when filter is arranged on engine under when effectively utilizing from herein exhaust heat this structure particularly useful.
Catalyst is placed on engine under the time, filter space is very limited, and needs complicated filter shape sometimes; Yet, because the honeycomb molded body of second aspect present invention has the stepped construction at length direction, therefore can easily address this problem, and waste material not.
In addition, when carrying out regenerative process, along with the combustion process of particle, on the length direction of filter, produce the bigger temperature difference, and on filter, produce bigger thermal stress subsequently; But the honeycomb molded body of second aspect present invention is owing to the stepped construction that has along its length, even therefore produce the big temperature difference on whole filter, the temperature difference that produces on each corresponding units also diminishes, and thermal stress is subsequently also diminished.Therefore, this honeycomb molded body is difficult for suffering damage.Particularly, although a little less than above-mentioned filter with complicated shape becomes with respect to thermal stress, even the honeycomb molded body of second aspect present invention is not because above-mentioned reason is vulnerable to the infringement such as the crack yet when having complicated shape.
And, for the honeycomb molded body of second aspect present invention and since can be before moulding with catalyst attached to as on the inorfil of constituent material, therefore can be with catalyst so that dispersity is attached thereto more equably.Because this structure has stepped construction in the longitudinal direction, when therefore forming this stepped construction, can be according to the purposes independent assortment of structure catalyst decentralization and catalyst type with respect to length direction.Therefore think that the honeycomb molded body of second aspect present invention can improve regenerative process effectively and be used for the purification function of pernicious gas.
In the honeycomb molded body of second aspect present invention, by alternately or stacked randomly, can on the surface of the wall portion of honeycomb molded body, easily form concavo-convex with different units.Like this, filter area can be increased, and the pressure loss when capturing particle can be reduced in by being formed on the lip-deep concavo-convex of wall portion.In addition, these concavo-convex exhaust streams that can make form turbulent flow, thereby can reduce the temperature difference in filter, and then prevent because the infringements such as crack that thermal stress produces.
In addition, the manufacture method of the honeycomb molded body of third aspect present invention can be made the honeycomb molded body of the present invention first and second aspects well.
Description of drawings
Fig. 1 (a) is the stereogram that schematically shows the honeycomb molded body of first aspect present invention; Fig. 1 (b) is that the honeycomb molded body A-A along the line shown in Fig. 1 (a) cuts open the profile of getting.
Fig. 2 (a) is the stereogram of copying making sheet that schematically shows the honeycomb molded body that constitutes first aspect present invention; Fig. 2 (b) be expression with shown in Fig. 2 (a) to copy making sheet stacked to make the stereogram of honeycomb molded body state.
Fig. 3 is the profile of an example that schematically shows the emission-control equipment of the honeycomb molded body that has used first aspect present invention.
Fig. 4 is the stereogram that schematically shows traditional honeycomb filter.
Fig. 5 (a) is the stereogram that schematically shows the porous ceramic member of the honeycomb filter shown in the pie graph 4; Fig. 5 (b) is that the porous ceramic member shown in Fig. 5 (a) cuts open the profile of getting along line B-B.
Fig. 6 shows the SEM photo of the honeycomb molded body of embodiment 1 apart from the internal state of through hole 1.5mm.
Fig. 7 shows the SEM photo of the honeycomb molded body of comparative example 1 apart from the internal state of through hole 1.5mm.
Fig. 8 (a) is the front view that schematically shows honeycomb molded body; Fig. 8 (b) is that the honeycomb molded body B-B along the line shown in Fig. 8 (a) cuts open the profile of getting.
Fig. 9 (a) is the stereogram of another embodiment that schematically shows the honeycomb molded body of first aspect present invention; Fig. 9 (b) is the stereogram of another embodiment that schematically shows the honeycomb molded body of first aspect present invention.
Symbol description
10 honeycomb molded bodies
10a, 10b copy making sheet
11 have bottom outlet (through hole)
13 partition walls
20 honeycomb molded bodies
23 housings
200 emission-control equipments
The specific embodiment
At first, will the embodiment of the honeycomb molded body of a first aspect of the present invention be described.
The honeycomb molded body of the first aspect present invention that embodiment relates to is the cylindricality honeycomb molded body, mainly by fibrous, the sealed a large amount of through holes (to have called bottom outlet in the following text) of any end be arranged in parallel in the longitudinal direction across partition wall, it is characterized in that, constitute in the inorfil of above-mentioned honeycomb molded body, with compare along the face parallel with the formation direction that bottom outlet is arranged, more along the inorfil of the planar orientation vertical with the formation direction that bottom outlet is arranged.
The honeycomb molded body of first aspect present invention mainly is made of inorfil.
For inorfil, it is for example enumerated: oxide ceramics, for example, silica-alumina, mullite, aluminium oxide and silica; Nitride ceramics, for example, aluminium nitride, silicon nitride, boron nitride and titanium nitride; And carbide ceramics, for example, carborundum, zirconium carbide, titanium carbide, ramet and tungsten carbide.
These inorfils can use separately, perhaps can be used in combination two or more.
For the fibre length of inorfil, preferred lower limit is 0.1mm, and preferred higher limit is 100mm, and preferred lower limit is 0.5mm, and preferred higher limit is 50mm.The preferred lower limit in fiber footpath of inorfil is 1 μ m, and preferred higher limit is 30 μ m, and preferred lower limit is 2 μ m, and preferred higher limit is 20 μ m.
Except above-mentioned inorfil, this honeycomb molded body can comprise adhesive, keeps predetermined shape thereby be used for inorfil is bonded to each other.
Be not specifically limited for above-mentioned adhesive, can use unorganic glass, for example, silicate glasses, silicate base glass and pyrex; Alundum (Al colloidal sol; Silicon dioxide gel; TiO 2 sol etc.
For the content of above-mentioned bonding agent, preferred lower limit is 5 weight %, and preferred higher limit is 50 weight %; Preferred lower limit is 10 weight %, and preferred higher limit is 40 weight %; Most preferred higher limit is 20 weight %.
For the apparent density of above-mentioned honeycomb molded body, preferred lower limit is 0.05g/cm
3, preferred higher limit is 1.00g/cm
3Preferred lower limit is 0.10g/cm
3, preferred higher limit is 0.50g/cm
3
For the porosity of above-mentioned honeycomb molded body, preferred lower limit is 60 volume %, and preferred higher limit is 98 volume %; Preferred lower limit is 80 volume %, and preferred higher limit is 95 volume %.
When the porosity surpassed 60 volume %, particle can soak into honeycomb molded body dearly, is filtered easily, thereby is easy to make particle to contact with the catalyst that is carried on pars intramuralis; Therefore, can improve reactivity.But the porosity that surpasses 98 volume % is tending towards making its undercapacity.
In addition, can measure the apparent density and the porosity, for example the measuring method of gravimetric method, Archimedes's method and use SEM (SEM) by known method.
On the inorfil that constitutes honeycomb molded body, can carry the catalyst of making by noble metal, for example platinum, palladium and rhodium.Except noble metal, can add such as alkali metal (periodic table of elements the 1st family), alkaline-earth metal (periodic table of elements the 2nd family), rare earth element (periodic table of elements the 3rd family) and transition metal.
When carrying this catalyst on it, the filter that has used honeycomb molded body of the present invention can be brought into play as being used for CO, HC that purifying exhaust gas contains, and the catalyst of NOx etc. in the function of performance as the filter that captures particle in the exhaust and can regenerate by catalyst.
Carry the above-mentioned catalyst that contains noble metal first aspect present invention honeycomb filter as and the same gas cleaning plant performance function of DPF (diesel particulate filter) of existing known band catalyst.Therefore, omitted the detailed description of honeycomb filter to the first aspect of the present invention herein as the catalyst situation.
Embodiment to the first aspect of the present invention describes below with reference to accompanying drawings.
Above-mentioned honeycomb molded body can contain small amounts of inorganic particle and metallic.For inorganic particulate, for example can enumerate: carbide, nitride and oxide etc.Specifically can enumerate the inorganic powder of making by carborundum, silicon nitride, boron nitride, aluminium oxide, silica, zirconium dioxide, titanium dioxide etc.For metallic, can enumerate metallic silicon, aluminium, iron, titanium etc.These can use separately, perhaps can make up two or more use.
Fig. 1 (a) is the schematic perspective view of concrete example of the honeycomb molded body of first aspect present invention, cuts open the profile of getting and Fig. 1 (b) is line A-A along Fig. 1 (a).
Shown in Fig. 1 (a), honeycomb molded body 10 is cylindrical structurals of performance filter, and wherein a large amount of any ends are sealed has bottom outlet 11 to be arranged in parallel at length direction across partition wall.
In other words, shown in Fig. 1 (b), have bottom outlet 11 sealed at any place of the end of exhaust inflow side or outflow side, thus make enter an exhaust that bottom outlet 11 arranged certain by after separating the partition wall 13 that bottom outlet 11 is arranged, just have bottom outlet 11 to discharge from another; Therefore, honeycomb molded body can be used as filter.
For the thickness of above-mentioned wall portion, preferred lower limit is 0.2mm, and preferred higher limit is 10.0mm; Preferred lower limit is 0.3mm, and preferred higher limit is 6mm.
For the density of the through hole on the section vertical with the length direction of this honeycomb molded body, preferred lower limit is 0.16/cm
2(1.0/inch
2), preferred higher limit is 62/cm
2(400/inch
2); Preferred lower limit is 0.62/cm
2(4.0/inch
2), preferred higher limit is 31/cm
2(200/inch
2).
In addition, the size of through hole preferably is arranged in the scope of 1.4mm * 1.4mm to 16mm * 16mm.
The honeycomb molded body of first aspect present invention can have above-mentioned integrative-structure; Perhaps, as shown in Figure 1, preferably by with the tabular component 10a of thickness in 0.1mm to the 20mm scope duplexer of stacked formation in the longitudinal direction.
In this case, preferably that tabular component 10a is stacked, and make through hole 11 stacked mutually along length.
Herein, so-called " through hole 11 is stacked mutually " is meant that with tabular component 10a the corresponding through hole that is formed in the adjacent tabular component can communicate with each other when stacked.
Above-mentioned tabular component can be easily obtained by copying method for making etc., and, the honeycomb molded body of making by duplexer can be obtained by making them stacked.Duplexer can form by using bonding described members such as inorganic bonding agent, perhaps can form by physics is stacked simply.When making duplexer, the direct tabular member of laminated thin in the housing (metal system cylindrical member) that can use by on being installed in blast pipe the time, and it is exerted pressure, thereby form honeycomb molded body.In this case, owing to formed duplexer at first, so can prevent appearance such as crack with multilayer.The formation method and the laminating method of tabular component will be described after a while.
In honeycomb molded body shown in Figure 1 10, its shape is cylindric, and still, the honeycomb molded body of first aspect present invention specifically is not limited to cylindric, can have any desired post shapes, for example, can be oval column and prism-shaped and any size.
In addition, in the time of under filter being installed in engine, the space of filter is very limited, and needs complicated filter shape; Yet, under the situation of first aspect present invention, even complicated shape, for example shown in Fig. 9 (a), have the filter 30 of recess and the filter 40 that has recess in both sides shown in Fig. 9 (b) in a side, also can to copy sheeting 30b or 40b stacked and easily form at length direction by making.In addition since copy sheeting 30b or 40b stacked at length direction, therefore even, also can form easily in the shape of length direction bending and the deformed shape that gradually changes at length direction.
Here, the filter regeneration of use honeycomb molded body means makes particle burning, and renovation process for the honeycomb molded body of first aspect present invention, can adopt the method that wherein heats honeycomb molded body by the heater that is installed in the exhaust inflow side, perhaps can adopt following method, oxidation catalyst is carried on the honeycomb molded body, thereby utilize by oxidation and the heat that produces is carried out regenerative process simultaneously at the purification process that is used for exhaust under this oxidation catalyst effect such as the hydrocarbon in the exhaust.And then, the solid catalyst of direct oxidation particle can be placed on the filter, perhaps utilize the oxidation catalyst that is placed on the filter upstream side to come oxidation of NOx to generate NO
2Thereby, by the NO that generates
2Make particulate oxidation.
Below, will the embodiment of the alveolate texture of second aspect present invention be illustrated simply.
The embodiment of the honeycomb molded body of second aspect present invention is except that following aspect, and is basic identical with the embodiment of the honeycomb molded body of first aspect present invention.In other words, the honeycomb molded body of second aspect present invention makes through hole necessarily stacked on top of each other along length when making tabular component stacked, and inorfil needn't along predetermined direction be orientated these 2 embodiments with the honeycomb molded body of first aspect present invention different outside, basic identical on its structure.Therefore, omitted detailed description herein to each constitutive characteristic.
Purposes for the honeycomb molded body of the present invention first and second aspects although be not specifically limited, is preferred in the emission-control equipment of vehicle.
Fig. 3 is the profile of an example that schematically shows the emission-control equipment of the honeycomb molded body vehicle that is provided with first and second aspect of the present invention.
As shown in Figure 3, in the emission-control equipment 200, housing 23 covers the outside of the honeycomb molded body 20 of the present invention first and second aspects; The end that the exhaust of housing 23 imports side connects with the inlet tube 24 that is connected combustion system such as engine, the other end of housing 23 and be connected blast pipe 25 connections of outside.Herein, arrow shows exhaust stream among Fig. 3.
In emission-control equipment 200 with said structure, introduce in the housing 23 by inlet tube 24 from the exhaust of discharging such as the combustion system of engine, through hole process wall portion (partition wall) from honeycomb molded body 20, thereby in this wall portion (partition wall), capture particle and make its purification, be discharged to the outside by blast pipe 25 afterwards.
Like this, a large amount of particle packings are in the wall portion (partition wall) of honeycomb molded body 20, and the pressure loss increases, then by using said method to make honeycomb molded body 20 stand regenerative process.
To the manufacture method of the honeycomb molded body of third aspect present invention be described below.
The manufacture method of honeycomb molded body of the present invention is characterised in that, with mainly making and be provided with the flaggy of through hole when folded by inorfil, makes through hole stacked on top of each other.
The manufacture method of the honeycomb molded body of the application of the invention can form the honeycomb molded body of the present invention first or second embodiment well.
Below, with reference to Fig. 2, will be according to procedural order, an example of the manufacture method of honeycomb molded body of the present invention is described.
(1) applies the process of catalyst to inorfil
Make such as inorfils such as alumina fibres to be immersed in the oxide slurries that carry by the catalyst of making such as noble metals such as Pt, from slurries, take out then and heating, be attached with the inorfil of catalyst with preparation.Inorfil is immersed in the slurries that comprise catalyst, takes out then and heat, thereby catalyst is attached directly on the inorfil.The amount of loading with always of catalyst is preferably in the scope of 0.01g/10g to 1g/10g inorfil.When manufacturing did not have catalyst to load with thereon honeycomb molded body, this process can be omitted.
Like this, in first and second honeycomb molded bodies aspect the present invention first and second, since can be before forming honeycomb molded body with catalyst attached to inorfil as constituent material on, therefore can make catalyst in the mode that more evenly is provided with attached on the honeycomb molded body.Therefore, the honeycomb molded body that is obtained can strengthen the combustion function and the function that is used for cleaning harmful gas to particle.In addition, can after forming plate, apply the process of catalyst by the system of copying.
(2) system of the copying preparation process of slurries
Next, to disperse with the ratio of 1 premium on currency 5g to 100g from the inorfil that carries catalyst that process (1) obtains, in addition, relative 100 weight portion inorfils, add 10 weight to 40 weight portions such as inorganic bond and 1 weight portion to 10 weight portion such as organic bonds such as acrylic emulsion such as silicon dioxide gels, and add again as required on a small quantity such as coagulating agent such as aluminum sulfate and such as agglutinants such as polyacrylamides, and fully stir with the preparation system of copying slurries.
For organic bond, for example can enumerate: methylcellulose, carboxymethyl cellulose, hydroxyethylcellulose, polyethylene glycol, phenolic resins, epoxy resin, polyvinyl alcohol and styrene butadiene ribber etc.
(3) copy the system process
By using perforated screen the slurries that obtain in the process (2) are copied system, in this perforated screen, form hole with reservation shape with predetermined each other interval, and the temperature in 100 ℃ to 200 ℃ scopes makes the material drying of acquisition, thus obtain as shown in Fig. 2 (a) have through hole and a predetermined thickness copy making sheet 10a.The thickness of copying making sheet 10a is preferably in the scope of 0.1mm to 20mm.
In first and second aspects of the present invention, for example by using the sieve wherein be formed with the reservation shape hole with interlaced pattern, what can obtain that two ends use copies making sheet 10b.In other words, by using this to copy making sheet, after forming through hole, needn't can obtain honeycomb molded body at the predetermined through hole of place, two ends sealing as filter at the place, two ends.
(4) lamination process
Shown in Fig. 2 (b), by using the cylinder shell 23 that has pressing member in a side, that at first uses at housing 23 inner stacks multi-disc two ends copies making sheet 10b, and it is stacked afterwards making sheet 10a to be copied in many inside.Then, last stacked multi-disc two ends are used copies making sheet 10b, and after pushing, another pressing member also is placed on opposite side and fixed thereon, thereby preparation is accomplished to the honeycomb molded body of encapsulation.
In this process, make and copy making sheet 10a, when 10b is stacked, make through hole stacked on top of each other.
To copy simply by this way under the stacked situation of sheeting physics with the formation honeycomb molded body, when being installed in this honeycomb molded body on the exhaust channel, even occur temperature setting to a certain degree in this honeycomb molded body, and the temperature setting of every plate is also less, therefore is difficult for producing crack etc.
In addition, by the system of copying, the orientation of above-mentioned inorfil is almost parallel with the main surface of copying making sheet, when making duplexer, in the above-mentioned inorfil, and compare along the face parallel with the formation direction of through hole, more along the inorfil of the planar orientation vertical with the formation direction of through hole.Therefore, the easier wall portion of passing honeycomb molded body of exhaust; Therefore, can reduce the pressure loss at initial stage, and can be at the more deep layer ground of pars intramuralis filtering particle.Therefore, can prevent from the surface of partition wall, to form filter cake layer, and the increase of the pressure loss when therefore being suppressed at granule capturing.
In addition, because exhaust increases in the ratio that flows abreast with the differently-oriented directivity of inorfil, so particle and the chance increase that contacts attached to the catalyst on the inorfil, thereby particle is burnt easily.
In addition, formation have the different size hole copy making sheet and with it under the stacked situation, allow bottom outlet form concavo-convex, thereby can form the bottom outlet that has with large surface area.Therefore, make filter area become big, thereby can reduce the pressure loss when capturing particle.Therefore, can capture more particles.For the shape in hole, be not particularly limited to quadrangle (square), can adopt such as triangle, hexagon, octagon, dodecagon, circle and oval-shaped arbitrary shape.
Embodiment
Below, will explain the present invention in the mode of embodiment; Yet the present invention is not limited in these embodiment.
[embodiment 1]
(1) applies the process of catalyst to inorfil
Make alumina fibre (fiber diameter: 5 μ m, average fiber length: 0.3mm) be immersed in the aluminium oxide slurries of loading with Pt etc. (Pt concentration: 5 weight %) 2 minutes, then 500 ℃ of heating, with the alumina fibre of preparation attached catalyst.The adhesion amount of Pt is the 0.24g/10g aluminium oxide.
(2) system of the copying preparation process of slurries
Next, will disperse with the ratio of 1 premium on currency 10g, in addition,, add the silicon dioxide gel of relative fiber 5 weight % as inorganic bond from the inorfil that process (1) obtains; As organic bond, add the acrylic emulsion of 3 weight %.In addition, also a small amount of as the aluminum sulfate of coagulating agent and the polyacrylamide that is used as agglutinant to wherein adding, and fully stir this mixture with the preparation system of copying slurries.
(3) copy the system process
As the perforated screen of 143.8mm the slurries that obtain are copied system by using diameter in process (2), almost be formed with the hole that the space is 2mm on this perforated screen comprehensively, the hole is of a size of 4.5mm * 4.5mm, and make the material drying of acquisition 150 ℃ temperature, thereby obtain 1mm thick copy making sheet A
1, copy making sheet A
1Being formed with the space on the whole surface is 2mm and the hole that is of a size of 4.5mm * 4.5mm.
In addition,, be of a size of the sieve in the hole of 4.5mm * 4.5mm by using wherein with interlaced pattern formation, and carry out same system of copying and dry run, copy making sheet B with preparation in order to obtain the thin plate that two ends are used.
(4) lamination process
To be arranged such that a side that pressing member installs down at the housing (cylindrical metal container) that a side has a pressing member.Three are copied making sheet B stacked after, copy making sheet A1 for stacked 150, copy making sheet, further push for last stacked three, another pressing member be placed on opposite side and fixed thereon, thereby the length that preparation is made of duplexer is the honeycomb molded body of 150mm thereafter.The Pt adhesion amount of this honeycomb molded body is 5g/l.
In this process, when flaggy is folded, make through hole stacked on top of each other.
[embodiment 2 and 3]
Except that the adhesion amount with the Pt catalyst becomes 0.1g/10g aluminium oxide (embodiment 2) and 0.15g/10g aluminium oxide (embodiment 3), carry out the process identical to obtain honeycomb molded body with embodiment 1.The Pt adhesion amount of the honeycomb molded body of embodiment 2 is 2g/l, and the Pt adhesion amount of the honeycomb molded body of embodiment 3 is 3g/l.
[embodiment 4 and 5]
Except that the fibre length with alumina fibre becomes 10mm (embodiment 4) and 50mm (embodiment 5), carry out the process identical to obtain honeycomb molded body with embodiment 1.
[embodiment 6 and 7]
(embodiment 6: fiber diameter: 3 μ m except using the silica-alumina fiber respectively, average fiber length: 1mm) (embodiment 7: fiber diameter: 3 μ m with the silica-alumina fiber, average fiber length: 20mm) replace alumina fibre, carry out the process identical to obtain honeycomb molded body with embodiment 1.
[embodiment 8]
Except use has and copies making sheet A
1Identical shape and thickness be 2mm copy sheeting A
2, and with the stacked making sheet A that copies
2Be set at outside 75, carry out the process identical to obtain honeycomb molded body with embodiment 1.
[embodiment 9]
Except use has and copies making sheet A
1Identical shape and thickness be 15mm copy sheeting A
3, and with the stacked making sheet A that copies
3Be set at outside 10, carry out the process identical to obtain honeycomb molded body with embodiment 1.
[embodiment 10]
Make 75 identical with embodiment 1 making sheet A that copy
1, and the size in hole become 4.0mm * 4.0mm, and in addition, by carrying out and copying making sheet A
1Identical process is made 75 and is copied making sheet A
4And, except these plates are alternately stacked, carry out the process identical to obtain honeycomb molded body with embodiment 1.
[embodiment 11]
Make 75 identical with embodiment 1 making sheet A that copy
1, and the size in hole become 3.5mm * 3.5mm, and in addition, by carrying out and copying making sheet A
1Identical process is made 75 and is copied making sheet A
5, and, except these thin plates are alternately stacked, carry out the process identical to obtain honeycomb molded body with embodiment 1.
(comparative example 1)
Similarly to Example 1, carry out applying the process (1) of catalyst and copying the preparation process made from slurries (2) to inorfil, and there is not the sieve of the 144mm * 150mm in hole that the slurries that obtain are copied the system process by use, and then 150 ℃ with the material drying that obtains, with the preparation size be 144mm * 150mm * 2mm copy making sheet C.In addition, will copy making sheet C and be cut into and be of a size of 144mm * 4.5mm * 2mm, copy making sheet D thereby make.
(4) lamination process
By using 144mm * 2mm face that inorganic bond will copy making sheet D with the interval bonding of 4.5mm and stick on the surface of copying making sheet C, thereby preparation size is the plywood of 144mm * 150mm * 6.5mm.In addition, make these plywood bondings and stacked, be of a size of the honeycomb molded body of the quadrangular shape of 144mm * 150mm * 145mm with formation by using inorganic bond.
Afterwards, its peripheral part is carried out working angles, finally form the cylindrical shape that diameter is 143.8mm, and by using inorganic bond, apply encapsulant at its periphery, thereby obtain to have the honeycomb molded body of the cylindrical shape that is of a size of 4.5mm * 4.5mm through hole.
Then, in three being copied the stacked housing that pressing member at one end is installed of making sheet B (cylindrical metal container) after, resulting cylindrical honeycomb structure promoted and insert wherein, copy making sheet B for stacked again three; At last, the opposite side that another pressing member is placed on housing is also fixing, thereby the preparation diameter is that 143.8mm and length are the honeycomb molded body of 150mm.
(comparative example 2)
(1) be that the α type silicon carbide powder of 10 μ m and beta-type silicon carbide powder that 20 weight % average grain diameters are 0.5 μ m carry out wet mixed with 80 weight % average grain diameters, the mixture that obtains to 100 weight portions adds and mediates the organic bond (methylcellulose) of 5 weight portions, the water of 10 weight portions, to obtain kneaded material.Then, in above-mentioned kneaded material, behind further interpolation and kneading small amount of plasticizer and the lubricant,, give birth to formed body thereby form with the mixture extrusion modling that obtains.
Then, by using microwave dryer to make above-mentioned generation type soma dry, after the use and the pasty state sealing substance of above-mentioned living formed body same composition are filled predetermined through hole, by using drier to carry out drying once more, then 400 ℃ of degreasings, and under normal pressure in the argon gas atmosphere, in 2200 ℃ of sintering 3 hours, thereby make porous ceramic member, and its size is 3.1/cm for 33mm * 33mm * 150mm, perforation hole count as carborundum sintered body
2, the thickness of partition wall is 2mm.
(2) using the hear resistance adhesive to stick with paste, in conjunction with bunchy, by using diamond cutter that it is cut off, is the columned ceramic component of 141.8mm to form diameter with a large amount of porous ceramic members then.Described hear resistance adhesive is stuck with paste and is contained the alumina fibre that 19.6 weight % fibre lengths are 0.2mm, carborundum particle, 10.1 weight % silica sols and the 2.5 weight % carboxy methyl celluloses that 67.8 weight % average grain diameters are 0.6 μ m.
Then, the inorfil of 23.3 weight %, the inorganic particle of 30.2 weight %, the inorganic bond of 7 weight %, the organic bond of 0.5 weight % and the water of 39 weight % are mixed and kneading, make the pasty state encapsulant.Wherein, inorfil is the ceramic fibre made by alumina silicate (a slag ball content: 3%, fibre length: 0.1mm to 100mm); Inorganic particle is that average grain diameter is the silicon carbide powder of 0.3 μ m; Inorganic bond is the silicon dioxide gel (SiO in the colloidal sol
2Content: 30 weight %); Organic bond is a carboxy methyl cellulose.
Then, use above-mentioned pasty state encapsulant on the outer peripheral portion of above-mentioned ceramic component, to form the pasty state sealing material layer of thickness as 1.0mm.In addition, at this pasty state sealing material layer of 120 ℃ of dryings, thereby make the cylindrical honeycomb structure.Afterwards, utilize traditional method with the ratio of 5g/l with Pt attached on this honeycomb molded body.
(comparative example 3)
(1) with 65 weight % alumina fibres (average fiber size: 5 μ m, fibre length: 0.3mm), 30 weight % silicon dioxide gels, 3 weight % organic bonds (methylcellulose) and be respectively the plasticizer of 1 weight % and mix lubricant and mediating, afterwards with the mixture extrusion modling that obtains, to form living formed body.
Then, by using microwave dryer to make above-mentioned generation type soma dry, after the use and the pasty state encapsulant of above-mentioned living formed body same composition are filled predetermined through hole, by using drier that products therefrom is dry once more, then 400 ℃ of degreasings, and under normal pressure in the argon gas atmosphere,, be 3.1/cm thereby make diameter 143.8mm * length 150mm, connect hole count in 1200 ℃ of sintering 3 hours
2And partition wall thickness is the honeycomb molded body of 2mm.
(2) then, utilize traditional method (wherein alveolate texture being immersed in the aluminium oxide slurries of loading with Pt) with the ratio of 5g/l with Pt attached on this honeycomb molded body.
(evaluation method)
(1) observes the saturation of particle to inside
Except do not have catalyst attached thereto, the honeycomb molded body that manufacturing is identical with embodiment and comparative example, and the honeycomb molded body of each embodiment and comparative example is placed in the exhaust channel of engine is with as filter, so, form emission-control equipment.Then, drive above-mentioned engine and turned round 10 minutes, and cut off with the face vertical with length direction with 3000 rev/mins of revolutions and torque 50Nm, and then by using SEM (SEM) to observe cross section, with the degree of depth of confirming that particle reaches, and the degree of depth that reaches of definite particle.Table 2 has shown the degree of soaking into to inside.
(2) observe regenerative process
Except that not thereon the attached catalyst, the honeycomb molded body that manufacturing is identical with embodiment and comparative example, and each honeycomb molded body is placed on the engine exhaust path with as filter, so, formed emission-control equipment.Then, drive above-mentioned engine with 3000 rev/mins of revolutions and torque 50Nm turn round capture the particle of 8g/l to the filter till, then filter is carried out regenerative process so that particle burning.
Here, for the honeycomb molded body of embodiment 1 to 11, in regenerative process at plate apart from the front and back of 20mm position, exhaust inflow side and plate apart from the front and back of 20mm position, exhaust outflow side, measure the temperature in the filter.Then, calculate the temperature difference that every plate with respect to each position produces in the longitudinal direction.In addition, for the honeycomb molded body of comparative example 1 to 3, the position of measuring distance exhaust inflow side 20mm and apart from the temperature of the position of exhaust outflow side 20mm.Then, calculate the temperature difference that produces at the length direction of each honeycomb molded body.
In addition, the process and the regenerative process of the particle of above-mentioned capture 8g/l are carried out 100 times repeatedly, and cut each honeycomb molded body, use SEM (SEM) to observe the crack wherein whether occurs with the face vertical with length direction.
(3) increase of the observation pressure loss
The filter of each embodiment and comparative example is placed in the engine exhaust path, to form emission-control equipment.Then, drive above-mentioned engine and turned round 100 minutes, and measure the grain amount that captures and the pressure loss with 1200 rev/mins of revolutions and torque 10Nm.
(4) porosity of honeycomb molded body
Measure the porosity of honeycomb molded body by operating weight porosity mensuration.Create conditions and evaluation result be shown in table 1 and 2.
Table 1
| Inorganic fibers | Fiber diameter (μ m) | Average fiber length (mm) | Machine direction | |
| Embodiment 1 | Aluminium oxide | 5 | 0.3 | Perpendicular to bottom outlet is arranged |
| Embodiment 2 | Aluminium oxide | 5 | 0.3 | Perpendicular to bottom outlet is arranged |
| Embodiment 3 | Aluminium oxide | 5 | 0.3 | Perpendicular to bottom outlet is arranged |
| Embodiment 4 | Aluminium oxide | 5 | 10 | Perpendicular to bottom outlet is arranged |
| Embodiment 5 | Aluminium oxide | 5 | 50 | Perpendicular to bottom outlet is arranged |
| Embodiment 6 | Silica-alumina | 3 | 1.0 | Perpendicular to bottom outlet is arranged |
| Embodiment 7 | Silica-alumina | 3 | 20 | Perpendicular to bottom outlet is arranged |
| Embodiment 8 | Aluminium oxide | 5 | 0.3 | Perpendicular to bottom outlet is arranged |
| Embodiment 9 | Aluminium oxide | 5 | 0.3 | Perpendicular to bottom outlet is arranged |
| |
Aluminium oxide | 5 | 0.3 | Perpendicular to bottom outlet is arranged |
| |
Aluminium oxide | 5 | 0.3 | Perpendicular to bottom outlet is arranged |
| Comparative example 1 | Aluminium oxide | 5 | 0.3 | Be parallel to bottom outlet is arranged |
| Comparative example 2 | — | ——— | ——— | ——— |
| Comparative example 3 | Aluminium oxide | 5 | 0.3 | Be parallel to bottom outlet is arranged |
Clear as can be known from the result shown in table 1 and 2, in the honeycomb molded body of each embodiment, for the inorfil that constitutes honeycomb molded body, and compare along the face parallel with the formation direction of through hole (bottom outlet is arranged), more along the fiber of the planar orientation vertical with the formation direction of through hole; Therefore, with the honeycomb molded body of comparative example 1 (wherein, more fiber is along the surface orientation parallel with the formation direction of through hole) and compare by the honeycomb molded body (comparative example 2) that sintered ceramic particle forms, particle can arrive the more depths of honeycomb molded body.
Fig. 6 and 7 is SEM photos, and this photo demonstrates each honeycomb molded body of embodiment 1 and comparative example 1 apart from the state in the wall of the through hole 1.5mm position that flows into exhaust.These photos clearly show, and in the honeycomb molded body of embodiment, particle is captured after can arriving this part, and in the honeycomb molded body of comparative example 1, particle fails to arrive this part.Honeycomb molded body for comparative example 2 has omitted accompanying drawing.
In addition, compare, in the honeycomb molded body of embodiment, can improve the porosity, the pressure loss when therefore having reduced the initial stage pressure loss and having captured 6g/l with the honeycomb molded body of making by the sintered ceramic particle (comparative example 2).
Clear as can be known from the result shown in the table 2, in the honeycomb molded body of embodiment, the temperature difference that produces at a plate object during regeneration is in 1 ℃ to 25 ℃ scope.
On the contrary, in the honeycomb molded body of comparative example, the temperature difference that produces in honeycomb molded body during regeneration is in 170 ℃ to 195 ℃ scope.
Therefore, as shown in table 2, can in the honeycomb molded body of comparative example, observe the crack after the regenerative process; On the contrary, even in the honeycomb molded body of embodiment, also fail to observe the crack after the regenerative process.
In addition, compare, improved the porosity in the honeycomb molded body of embodiment, the pressure loss when therefore having reduced the initial stage pressure loss and granule capturing with the honeycomb molded body of making by the sintered ceramic particle (comparative example 2).
In addition, in embodiment 10 and 11 the honeycomb molded body, on the surface of wall portion, form concavo-convex, thereby such honeycomb molded body can reduce the pressure loss behind the granule capturing.
Claims (6)
1, a kind of cylindricality honeycomb molded body, this honeycomb molded body mainly is made of inorfil, and has a structure that a plurality of through holes are be arranged in parallel at length direction across partition wall, it is characterized in that, described cylindricality honeycomb molded body is by with a plurality of tabular components with through hole, so that described through hole is stacked on top of each other along its length, stacked the obtaining of mode that the corresponding through hole in the adjacent tabular component is communicated with each other.
2, cylindricality honeycomb molded body as claimed in claim 1, wherein, described a plurality of tabular component differences with through hole, and with alternately or mode at random stacked, thereby on the surface of the wall portion of described honeycomb molded body, form concavo-convex.
3, cylindricality honeycomb molded body as claimed in claim 1 or 2, wherein, any end of the end of the through hole of described honeycomb molded body is sealed.
4, cylindricality honeycomb molded body as claimed in claim 1 or 2, wherein, the porosity of described honeycomb molded body is 60 volume % to 98 volume %.
5, cylindricality honeycomb molded body as claimed in claim 1 or 2 wherein, is uploaded at described inorfil and to be born catalyst.
6, cylindricality honeycomb molded body as claimed in claim 1 or 2, it is used for emission-control equipment.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003165588 | 2003-06-10 | ||
| JP2003165588 | 2003-06-10 | ||
| JP2003197385 | 2003-07-15 |
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| CNB2004800010722A Division CN100368054C (en) | 2003-06-10 | 2004-06-10 | Honeycomb structural body |
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| CN100542674C true CN100542674C (en) | 2009-09-23 |
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| CNB2004800010722A Expired - Fee Related CN100368054C (en) | 2003-06-10 | 2004-06-10 | Honeycomb structural body |
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| WO2009118816A1 (en) * | 2008-03-24 | 2009-10-01 | イビデン株式会社 | Honeycomb structure |
| JP5379678B2 (en) * | 2008-05-20 | 2013-12-25 | イビデン株式会社 | Honeycomb structure |
| CN101679129B (en) * | 2008-05-20 | 2012-08-08 | 揖斐电株式会社 | Honeycomb structure |
| DE102017103341A1 (en) * | 2017-02-17 | 2018-08-23 | Umicore Ag & Co. Kg | RUSSIAN PARTICLE FILTER WITH MEMORY CELLS FOR CATALYST |
| CN108019253B (en) * | 2017-11-20 | 2021-05-07 | 南京理工大学 | Magnetic particulate filter |
| EP3795251A4 (en) * | 2019-03-26 | 2021-06-09 | Sakura Kogyo Co., Ltd. | Catalyst layer forming material, catalyst device constituent material, catalyst device, and production methods thereof |
| DE102019207003B4 (en) * | 2019-05-14 | 2022-07-07 | Filtration Group Gmbh | Filter element for a filter unit and filter unit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4652286A (en) * | 1982-02-16 | 1987-03-24 | Matsushita Electric Industrial Co., Ltd. | Exhaust gas filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07213835A (en) * | 1994-02-03 | 1995-08-15 | Matsushita Electric Ind Co Ltd | Plugging agent for waste gas filter and waste gas filter |
| JP2002349230A (en) * | 2001-05-29 | 2002-12-04 | Isuzu Motors Ltd | Exhaust emission control device |
-
2004
- 2004-06-10 CN CNB2007101359030A patent/CN100542674C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4652286A (en) * | 1982-02-16 | 1987-03-24 | Matsushita Electric Industrial Co., Ltd. | Exhaust gas filter |
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| CN101053844A (en) | 2007-10-17 |
| CN100368054C (en) | 2008-02-13 |
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