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WO2017051800A1 - Filtre en nid d'abeilles, et procédé de fabrication de celui-ci - Google Patents

Filtre en nid d'abeilles, et procédé de fabrication de celui-ci Download PDF

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Publication number
WO2017051800A1
WO2017051800A1 PCT/JP2016/077704 JP2016077704W WO2017051800A1 WO 2017051800 A1 WO2017051800 A1 WO 2017051800A1 JP 2016077704 W JP2016077704 W JP 2016077704W WO 2017051800 A1 WO2017051800 A1 WO 2017051800A1
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Prior art keywords
pore
particle size
pore diameter
honeycomb structure
smaller
Prior art date
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Ceased
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PCT/JP2016/077704
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English (en)
Japanese (ja)
Inventor
健作 堀江
康輔 魚江
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Publication of WO2017051800A1 publication Critical patent/WO2017051800A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous

Definitions

  • the present invention relates to a honeycomb filter and a method for manufacturing a honeycomb filter.
  • a honeycomb filter has been used to remove a collected substance from a fluid containing the collected substance.
  • fine particles such as carbon particles contained in exhaust gas discharged from an internal combustion engine of a diesel engine are used. It is used as a ceramic filter (Diesel Particulate Filter) for collecting and a ceramic filter (Gasoline Particulate Filter) for gasoline engines.
  • the honeycomb filter has a plurality of parallel flow paths partitioned by partition walls, and one end of a part of the plurality of flow paths and the other end of the remaining part of the plurality of flow paths are sealed.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a honeycomb filter capable of realizing high filtration efficiency without excessively increasing pressure loss and a manufacturing method thereof.
  • the honeycomb filter according to the present invention includes a porous honeycomb structure having a plurality of flow paths, one end of a part of the plurality of flow paths, and a remaining flow in the plurality of flow paths. A plurality of sealing portions for closing the other end of the road.
  • the main component of the porous honeycomb structure is cordierite.
  • the pore size distribution of the porous honeycomb structure satisfies all the following conditions. (1a) D1 ⁇ 7 ⁇ m (1b) 10 ⁇ m ⁇ D50 ⁇ 14 ⁇ m (1c) 0.10 ⁇ (D90 ⁇ D10) /D50 ⁇ 0.78
  • D1 is a pore diameter in which 1% of the total pore volume has a smaller pore diameter
  • D10 has a pore diameter in which 10% of the total pore volume has a smaller pore diameter
  • D50 is a so-called median diameter in which 50% of the total pore volume has a smaller pore diameter
  • D90 is 90% of the total pore volume. The pore diameter has a smaller pore diameter.
  • the porosity of the porous honeycomb structure may be 60 to 70%.
  • a method for manufacturing a honeycomb filter according to the present invention includes a step of forming a mixture including an inorganic raw material containing a constituent element of cordierite, a binder, a pore former, and a solvent to obtain a formed body, and firing the formed body.
  • the volume-based particle size distribution measured by the laser diffraction particle size distribution measurement method of the pore former satisfies all the following conditions.
  • D'10 is accumulated from the smaller particle size and corresponds to a cumulative particle size of 10%
  • D'50 is accumulated to a particle size corresponding to 50%
  • D'90 is accumulated from the smaller particle size.
  • the particle size corresponds to a cumulative 90%.
  • a honeycomb filter capable of realizing high filtration efficiency without excessively increasing pressure loss, and a method for manufacturing the same are provided.
  • FIG. 1 is a cross-sectional view along the axial direction of a honeycomb filter according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view in a direction perpendicular to the axis of the honeycomb filter according to one embodiment of the present invention.
  • FIG. 3 is a cross-sectional view in a direction perpendicular to the axis of a honeycomb filter according to another embodiment of the present invention.
  • the honeycomb filter 100 includes a porous honeycomb structure 120 and a sealing portion 130.
  • the porous honeycomb structure 120 has a columnar shape, and has an inlet end face (one end) 100a and an outlet end face (the other end) 100b.
  • the porous honeycomb structure 120 has a plurality of flow paths 110. Sealing portions 130 are respectively provided at the end portions of some of the flow channels 110 on the outlet end surface 100b side, and these partial flow channels 110 have inlets whose inlet end surfaces 100a are opened and whose outlet end surfaces 100b are sealed. A flow path 110a is formed. Sealing portions 130 are respectively provided at the ends of the remaining flow paths 110 on the inlet end face 100a side.
  • the remaining flow paths 110 are outlet flow paths 110b in which the inlet end face 100a is sealed and the outlet end face 100b is opened.
  • each inlet channel 110 a is adjacent to at least one outlet channel 110 b via a partition wall W.
  • the arrangement of the inlet channel 110a and the outlet channel 110b in the porous honeycomb structure is not particularly limited.
  • the inlet channel 110a may be adjacent to at least one outlet channel 110b, the inlet channel 110a may be adjacent to another inlet channel, or the outlet channel 110b may be adjacent to another outlet channel. May be.
  • the inlet channel 110 a is adjacent to the three other inlet channels 110 a and adjacent to the three outlet channels 110 b.
  • 110a and the outlet channel 110b may be regularly arranged.
  • one outlet channel 110b is adjacent to the six inlet channels 110a, and is not adjacent to the other outlet channels 110b.
  • Each flow path is adjacent to a total of 6 other flow paths through partition walls W.
  • the aggregate of the partition walls W constitutes the porous honeycomb structure 120.
  • the inlet channel 110a and the outlet channel are arranged so that one inlet channel 110a is adjacent to the four other inlet channels 110a and adjacent to the two outlet channels 110b.
  • 110b may be regularly arranged.
  • One outlet channel 110b is adjacent to the six inlet channels 110a, and is not adjacent to the other outlet channels 110b. Thus, each channel is adjacent to a total of six other channels.
  • each partition wall W is preferably 5 to 12 mil, that is, 0.125 to 0.30 mm, more preferably 6 to 10 mil, that is, 0.15 to 0.25 mm, and 6 to 8 mil, that is, 0.15 to 0.20 mm is more preferable.
  • the cell density that is, the density of the flow path (cell) in the cross section orthogonal to the axis of the porous honeycomb structure can be, for example, 150 to 350 cpsi.
  • the main component, that is, the maximum component of the porous honeycomb structure 120 is cordierite.
  • the porous honeycomb structure preferably contains 50% by mass or more of cordierite, preferably 70% by mass or more, more preferably 80% by mass or more, and still more preferably 90% by mass.
  • Cordierite is a compound composed of about 48% to about 52% by weight of SiO 2 component, about 32% to about 36% by weight of Al 2 O 3 component, and about 12% to about 15% by weight of MgO component And usually forms a crystalline phase.
  • the pore size distribution of the porous honeycomb structure 120 satisfies all the following conditions (1a) to (1c).
  • D1 is a pore diameter in which 1% of the total pore volume has a smaller pore diameter
  • D10 has a pore diameter in which 10% of the total pore volume has a smaller pore diameter
  • D50 is a so-called median diameter in which 50% of the total pore volume has a smaller pore diameter
  • D90 is 90% of the total pore volume. The pore diameter has a smaller pore diameter.
  • D10 can be 8-12 ⁇ m.
  • D90 can be 16-25 ⁇ m.
  • D99 can be 85 to 150 ⁇ m.
  • Dn (n is a real number of 0 to 100) is a pore diameter in which n% of the total pore volume has a smaller pore diameter.
  • D15 is preferably less than 10 ⁇ m, and more preferably less than 9.5 ⁇ m.
  • the volume of the pore diameter of 10 ⁇ m or less ( ⁇ 0-10 ⁇ m) is preferably larger than 15% of the total particle volume.
  • (D90-D10) / D50 is preferably 0.30 to 0.70. More preferably, it is 40 to 0.65. Further, 0.10 ⁇ (D50 ⁇ D10) /D50 ⁇ 0.25 may be satisfied.
  • the pore size distribution of the porous honeycomb structure 120 can be measured by a mercury intrusion method (contact angle: 130 °, surface tension: 485 dyne / cm).
  • the porosity of the porous honeycomb structure 120 is preferably 60 to 70%. If it is less than 60%, the pressure loss tends to increase, and if it exceeds 70%, the filtration efficiency tends to decrease.
  • the material of the sealing portion 130 is not particularly limited, but is preferably a ceramic material, and can be a ceramic mainly composed of cordierite as with the porous honeycomb structure 120.
  • the sealing part 130 can be porous and can have the same pore size distribution as the porous honeycomb structure.
  • the honeycomb filter having such a porous structure can realize high filtration efficiency without increasing pressure loss.
  • the exhaust gas can be flowed as indicated by an arrow G in FIG.
  • This honeycomb filter can be used as an exhaust gas filter for a gasoline engine.
  • the particle size of particles generated from a gasoline engine is considered to be smaller than the particles generated from a diesel engine, and the filtration efficiency of particles in gasoline engine exhaust gas is compared with the filtration efficiency of particles in diesel engine exhaust gas. Tends to be low.
  • a method for manufacturing a honeycomb filter includes, for example, a raw material preparation step for preparing an inorganic raw material powder containing a constituent element of cordierite and a raw material mixture containing an additive, and forming a raw material mixture to obtain a molded body having a plurality of channels.
  • the inorganic raw material powder containing the constituent elements of cordierite is a mixture containing a magnesium source, an aluminum source, and a silicon source.
  • magnesium source contained in the mixture examples include magnesium oxide and talc (Mg 3 Si 4 O 10 (OH) 2 ).
  • induced to magnesia by baking alone in the air is also mentioned.
  • examples of such a compound include magnesium salt, magnesium alkoxide, magnesium hydroxide, magnesium nitride, and magnesium metal.
  • magnesium salts include magnesium chloride, magnesium perchlorate, magnesium phosphate, magnesium pyrophosphate, magnesium oxalate, magnesium nitrate, magnesium carbonate, magnesium acetate, magnesium sulfate, magnesium citrate, magnesium lactate, and magnesium stearate.
  • magnesium salts include magnesium chloride, magnesium perchlorate, magnesium phosphate, magnesium pyrophosphate, magnesium oxalate, magnesium nitrate, magnesium carbonate, magnesium acetate, magnesium sulfate, magnesium citrate, magnesium lactate, and magnesium stearate.
  • magnesium salts include magnesium chloride, magnesium perchlorate, magnesium phosphate, magnesium pyrophosphate, magnesium oxalate, magnesium nitrate, magnesium carbonate, magnesium acetate, magnesium sulfate, magnesium citrate, magnesium lactate, and magnesium stearate.
  • Examples of the aluminum source are alumina (aluminum oxide), aluminum hydroxide, kaolin (Al 2 Si 2 O 5 (OH) 4 ).
  • induced to an alumina by baking alone in the air is also mentioned.
  • Examples of such a compound include aluminum salts, aluminum alkoxides, and metal aluminum.
  • crystal type of alumina examples include ⁇ type, ⁇ type, ⁇ type, and ⁇ type, and may be amorphous.
  • ⁇ -type alumina is preferable.
  • the aluminum salt may be an inorganic salt with an inorganic acid or an organic salt with an organic acid.
  • the aluminum inorganic salt include aluminum nitrates such as aluminum nitrate and ammonium nitrate, and aluminum carbonates such as ammonium aluminum carbonate.
  • the aluminum organic salt include aluminum oxalate, aluminum acetate, aluminum stearate, aluminum lactate, and aluminum laurate.
  • aluminum alkoxide examples include aluminum isopropoxide, aluminum ethoxide, aluminum sec-butoxide, aluminum tert-butoxide and the like.
  • Examples of the aluminum hydroxide crystal type include a gibbsite type, a bayerite type, a norosotrandite type, a boehmite type, and a pseudo-boehmite type, and may be amorphous (amorphous).
  • Examples of the amorphous aluminum hydroxide include an aluminum hydrolyzate obtained by hydrolyzing an aqueous solution of a water-soluble aluminum compound such as an aluminum salt or an aluminum alkoxide.
  • Examples of the silicon source include silicon oxide (quartz, amorphous silica), talc (Mg 3 Si 4 O 10 (OH) 2 ), and kaolin (Al 2 Si 2 O 5 (OH) 4 ).
  • induced to a silica by baking alone in the air is also mentioned.
  • Examples of such compounds include silicic acid, silicon carbide, silicon nitride, silicon sulfide, silicon tetrachloride, silicon acetate, sodium silicate, sodium orthosilicate, glass frit and the like.
  • the inorganic raw material powder containing the constituent elements of cordierite contains talc, kaolin and silica.
  • D'50 is preferably 5 to 30 ⁇ m, and more preferably 10 to 20 ⁇ m.
  • D'50 is a particle size corresponding to a cumulative 50%.
  • the particle size distribution is a volume-based particle size distribution obtained by a laser diffraction particle size distribution measurement method.
  • D′ 50 is preferably 1 to 20 ⁇ m, more preferably 1 to 10 ⁇ m.
  • D′ 50 is preferably 1 to 20 ⁇ m, and more preferably 3 to 10 ⁇ m.
  • the particle size distribution of silica satisfies the following formula (a).
  • D′ 10 is a particle size corresponding to 10% cumulative from the smaller particle size
  • D′ 90 is a particle size corresponding to 90% cumulative from the smaller particle size.
  • the inorganic raw material powder containing the constituent elements of cordierite may be partially or wholly cordierite powder.
  • the blending amount of each component is appropriately adjusted so that the SiO 2 component, Al 2 O 3 component, and MgO component fall within the above cordierite composition range.
  • the particle size D′ 50 of the inorganic raw material powder containing cordierite constituent elements can be 1 to 30 ⁇ m.
  • additives examples include pore formers (pore forming agents), binders, lubricants, plasticizers, and solvents.
  • the pore former a material formed by a material that disappears at a temperature lower than the temperature at which the molded body is degreased and fired in the firing process can be used.
  • the pore former disappears due to combustion or the like.
  • a space is created at the location where the pore former was present, and the inorganic raw material powder located between the spaces contracts during firing to form a communication hole in the partition wall through which fluid can flow. can do.
  • the pore former is, for example, organic powder, carbon powder, or dry ice powder.
  • organic powders are corn starch, barley starch, wheat starch, tapioca starch, bean starch, rice starch, pea starch, and potato starch (potato starch).
  • resin powders are polyethylene powder, hollow resin powder (a compound having an ether structure which is gasified at a temperature below the softening point of the thermoplastic resin and does not contain chlorine or bromine inside the thermoplastic resin as an outer shell. Is a thermally expandable microsphere).
  • An example of carbon powder is graphite.
  • the content of the pore former is, for example, 10 to 50 parts by mass, preferably 20 to 40 parts by mass with respect to 100 parts by mass of the inorganic raw material powder.
  • the particle size distribution of the pore former satisfies the following formulas (2a) and (2b).
  • D'10 is accumulated from the smaller particle size and corresponds to a cumulative particle size of 10%
  • D'50 is accumulated to a particle size corresponding to 50%
  • D'90 is accumulated from the smaller particle size.
  • the particle size corresponds to a cumulative 90%.
  • the particle size distribution is a volume-based particle size distribution obtained by a laser diffraction particle size distribution measurement method.
  • D′ 15 can be 10 ⁇ m or less.
  • D′ n (n is a real number from 0 to 100) is a particle size corresponding to the cumulative n% by integrating from the smaller particle size.
  • volume ( ⁇ 0-10 ⁇ m) of the pore-forming material particles having a particle diameter of 10 ⁇ m or less can be less than 15% of the total particle volume.
  • the binder is, for example, celluloses such as methylcellulose, carboxymethylcellulose, hydroxyalkylmethylcellulose, sodium carboxymethylcellulose; alcohols such as polyvinyl alcohol; salts such as lignin sulfonate; waxes such as paraffin wax and microcrystalline wax.
  • the content of the binder in the raw material mixture is, for example, 20 parts by mass or less with respect to 100 parts by mass of the inorganic raw material powder.
  • Lubricants or plasticizers include, for example, alcohols such as glycerin; higher fatty acids such as caprylic acid, lauric acid, palmitic acid, alginic acid, oleic acid and stearic acid; stearic acid metal salts such as stearic acid A1, polyoxyalkylene alkyl Ether.
  • the content of the lubricant or plasticizer in the raw material mixture is, for example, 10 parts by mass or less with respect to 100 parts by mass of the inorganic raw material powder.
  • the solvent examples include water and alcohol.
  • Water is preferably ion-exchanged water because it has few impurities.
  • the content of the solvent is, for example, 10 to 100 parts by mass with respect to 100 parts by mass of the inorganic raw material powder.
  • a green honeycomb formed body having a honeycomb structure having a plurality of flow paths is obtained.
  • it may be formed into the shape of the target green honeycomb by using a forming device such as a uniaxial press or an extrusion molding machine similar to those usually used.
  • the honeycomb structured green honeycomb formed body obtained in the forming step is fired to obtain a fired porous honeycomb structure.
  • calcination degreasing for removing a binder or the like contained in the molded body (in the raw material mixture) may be performed before the molded body is fired.
  • the firing temperature is usually 1300 ° C. or higher, preferably 1400 ° C. or higher.
  • a calcination temperature is 1500 degrees C or less normally, Preferably it is 1450 degrees C or less.
  • the temperature raising rate is not particularly limited, but is usually 1 to 500 ° C./hour.
  • the pore former is organic powder or carbon powder
  • the firing time may be a time sufficient for the inorganic raw material powder to transition to the cordierite-based crystal, and varies depending on the amount of raw material, type of firing furnace, firing temperature, firing atmosphere, etc., but is usually 5 to 24 hours. It is.
  • the sealing step is performed between the molding step and the firing step or after the firing step.
  • a sealing step is performed between the forming step and the firing step, one end of each flow path of the green honeycomb molded body obtained in the forming step is sealed with a sealing agent, and then green in the firing step.
  • a honeycomb structure including a sealing portion that seals one end of each flow path is obtained.
  • a honeycomb structure including a sealing portion that seals one end of each flow path is obtained.
  • the sealing agent a mixture similar to the raw material mixture for obtaining the green honeycomb molded body can be used.
  • a honeycomb filter having the porous structure described above can be easily obtained.
  • the present invention is not limited to the above embodiment, and various modifications can be made.
  • the inlet channel 110a and the outlet channel 110b are closed by the plug-shaped sealing part 130, but other sealing methods may be adopted.
  • the partition wall at the end of the porous honeycomb molded body is reduced toward the end face of the honeycomb filter until the cross-sectional area of one of the flow paths increases and the cross-sectional area of the other flow path becomes zero.
  • the sealing portion may be formed by deforming as described above and then firing.
  • Example 1 A cordierite raw material (talc, aluminum hydroxide, kaolin, silica), a pore former, a binder, and water were mixed, and a honeycomb formed body was prepared with an extruder.
  • the blending amount of each raw material other than water was, in order, 24.2% by mass, 28.6% by mass, 5.0% by mass, 10.7% by mass, 25.3% by mass, and 6.2% by mass.
  • Potato starch A shown in Table 1 was used as a pore former.
  • D′ 10, D′ 50, and D′ 90 were obtained based on the volume-based particle size distribution obtained by a laser diffraction particle size distribution analyzer.
  • an appropriate amount of water and a lubricant were added to the mixture of the raw materials, and molding was performed.
  • the formed honeycomb formed body had the shape shown in FIG. 2, and the density of hexagonal cells was 290 cpsi.
  • the outer diameter was 25.4 mm, the height was 150.3 mm, and the wall thickness was 10.4 mil.
  • honeycomb formed body One end or the other end of each flow path of the obtained honeycomb formed body was sealed by plugging using the same forming raw material as described above. Thereafter, the sealed honeycomb formed body was fired in an air atmosphere to obtain a honeycomb filter.
  • Measurement of the total pore volume and pore distribution was carried out by the mercury intrusion method using an Autopore III manufactured by Micromeritics.
  • a small piece cut out from the honeycomb filter is stored in the measurement cell as a test piece, and after the pressure inside the cell is reduced, mercury is introduced and then the pressure is applied, and the pressure at this time and the pressure is pushed into the pores existing in the sample.
  • the relationship between the pore diameter and the cumulative pore volume was determined from the relationship with the mercury volume.
  • the total pore volume was the cumulative pore volume at a pressure of 60,000 psi (414 MPa) (corresponding to a pore diameter of 0.003 ⁇ m).
  • the A-axis compressive strength was measured in accordance with the standard M505-87 “Testing method for ceramic monolithic carrier for automobile exhaust gas purification catalyst” established by the Society of Automotive Engineers of Japan.
  • Example 2 to 3 Comparative Examples 1 to 3 Except for changing the type of pore former as shown in Table 1, it was the same as Example 1.
  • Soot was gradually deposited on each filter at a soot generation rate of 1.3 g / h, a gas flow rate of 6 m 3 / h, and a gas temperature of room temperature, and the change in pressure loss was measured. The results are shown in Table 2.
  • Soot generation rate is 1.3 g / h
  • gas flow rate is 6 m 3 / h
  • gas temperature is gradually deposited on each filter at room temperature, and particles in the gas discharged from the filter outlet are collected at regular intervals. The weight was measured and the change in filtration efficiency over time was determined. The results are shown in Table 2.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Combustion & Propulsion (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

Le filtre en nid d'abeilles de l'invention possède une structure en nid d'abeilles poreuse, présente en tant que composant principal une cordiérite, et la répartition de la taille des pores de la structure en nid d'abeilles poreuse, satisfait l'ensemble des conditions ci-dessous. （ａ）Ｄ１＜７μｍ （ｂ）１０μｍ≦Ｄ５０≦１４μｍ （ｃ）０,１０≦（Ｄ９０－Ｄ１０）／Ｄ５０≦０,７８, par D1 on désigne le diamètre de pore du 1% de l'ensemble du volume des pores possédant le diamètre de pore le plus petit, par D10 on désigne le diamètre de pore des 10% de l'ensemble du volume des pores possédant le diamètre de pore le plus petit, par D50 on désigne le diamètre de pore des 50% de l'ensemble du volume des pores possédant le diamètre de pore le plus petit, c'est-à-dire le diamètre médian, et par D90 on désigne le diamètre de pore des 90% de l'ensemble du volume des pores possédant le diamètre de pore le plus petit.
PCT/JP2016/077704 2015-09-24 2016-09-20 Filtre en nid d'abeilles, et procédé de fabrication de celui-ci Ceased WO2017051800A1 (fr)

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JP2015186921A JP2018183709A (ja) 2015-09-24 2015-09-24 ハニカムフィルタ及びハニカムフィルタの製造方法

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JPWO2020136716A1 (ja) 2018-12-25 2021-02-15 株式会社超微細科学研究所 微細気泡生成方法及び微細気泡生成装置
US11691137B2 (en) * 2019-03-28 2023-07-04 Ngk Insulators, Ltd. Ceramic porous body and method for producing the same, and dust collecting filter
JP2020175343A (ja) * 2019-04-19 2020-10-29 株式会社超微細科学研究所 エアレータ
JP7198789B2 (ja) * 2020-03-02 2023-01-04 日本碍子株式会社 ハニカムフィルタの製造方法
KR102226766B1 (ko) * 2020-06-15 2021-03-11 주식회사 제이치물산 배기가스 정화용 세라믹 필터 제조방법 및 이에 의해 제조된 세라믹 필터
JP7481281B2 (ja) * 2021-02-25 2024-05-10 日本碍子株式会社 多孔質ハニカム構造体及びその製造方法
JP7629233B2 (ja) * 2021-03-30 2025-02-13 Ｈａｒｕｋａ株式会社 フィルタ

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WO2012023617A1 (fr) * 2010-08-19 2012-02-23 日立金属株式会社 Procédé de production de structure céramique en nid d'abeilles
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US20210268478A1 (en) * 2020-03-02 2021-09-02 Ngk Insulators, Ltd. Manufacturing method of honeycomb filter
CN113332810A (zh) * 2020-03-02 2021-09-03 日本碍子株式会社 蜂窝过滤器的制造方法
CN113332810B (zh) * 2020-03-02 2023-05-09 日本碍子株式会社 蜂窝过滤器的制造方法

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