WO2005063653A1 - ハニカム構造体 - Google Patents
ハニカム構造体 Download PDFInfo
- Publication number
- WO2005063653A1 WO2005063653A1 PCT/JP2004/018866 JP2004018866W WO2005063653A1 WO 2005063653 A1 WO2005063653 A1 WO 2005063653A1 JP 2004018866 W JP2004018866 W JP 2004018866W WO 2005063653 A1 WO2005063653 A1 WO 2005063653A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- honeycomb structure
- honeycomb
- porous
- inorganic material
- inorganic
- Prior art date
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- 239000002245 particle Substances 0.000 claims abstract description 95
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 77
- 239000011147 inorganic material Substances 0.000 claims abstract description 77
- 239000000919 ceramic Substances 0.000 claims abstract description 53
- 239000003054 catalyst Substances 0.000 claims abstract description 48
- 239000011230 binding agent Substances 0.000 claims abstract description 42
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 20
- 239000003566 sealing material Substances 0.000 claims description 46
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 229910000510 noble metal Inorganic materials 0.000 claims description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 150000001339 alkali metal compounds Chemical class 0.000 claims description 3
- 150000001341 alkaline earth metal compounds Chemical class 0.000 claims description 3
- -1 seria Chemical compound 0.000 claims description 3
- 239000004113 Sepiolite Substances 0.000 claims description 2
- 229960000892 attapulgite Drugs 0.000 claims description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 2
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- 229910052625 palygorskite Inorganic materials 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- 239000012779 reinforcing material Substances 0.000 claims description 2
- 229910052624 sepiolite Inorganic materials 0.000 claims description 2
- 235000019355 sepiolite Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 2
- 239000011521 glass Substances 0.000 claims 1
- 230000008646 thermal stress Effects 0.000 abstract description 10
- 239000000565 sealant Substances 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 52
- 239000000835 fiber Substances 0.000 description 28
- 230000035939 shock Effects 0.000 description 23
- 239000007789 gas Substances 0.000 description 20
- 238000012360 testing method Methods 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- 230000004580 weight loss Effects 0.000 description 13
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 12
- 238000010304 firing Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000005304 joining Methods 0.000 description 6
- 229910052697 platinum Inorganic materials 0.000 description 6
- 239000004927 clay Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 229920000609 methyl cellulose Polymers 0.000 description 3
- 239000001923 methylcellulose Substances 0.000 description 3
- 235000010981 methylcellulose Nutrition 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000003878 thermal aging Methods 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 239000002612 dispersion medium Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 241000406588 Amblyseius Species 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241001654684 Pinda Species 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- NWAHZABTSDUXMJ-UHFFFAOYSA-N platinum(2+);dinitrate Chemical compound [Pt+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O NWAHZABTSDUXMJ-UHFFFAOYSA-N 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
Classifications
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- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/247—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the cells
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- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
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- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2455—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the whole honeycomb or segments
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- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2459—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the plugs
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- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2474—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the walls along the length of the honeycomb
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2478—Structures comprising honeycomb segments
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
- B01D46/2488—Triangular
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- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2486—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure characterised by the shapes or configurations
- B01D46/2492—Hexagonal
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D46/2418—Honeycomb filters
- B01D46/2498—The honeycomb filter being defined by mathematical relationships
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- B01J35/56—
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- C—CHEMISTRY; METALLURGY
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- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
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- C—CHEMISTRY; METALLURGY
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- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
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Definitions
- the present invention relates to a honeycomb structure.
- honeycomb catalysts generally used for purification of automobile exhaust gas are manufactured by supporting a high specific surface area material such as active alumina and a catalytic metal such as platinum on the surface of a cordierite-type honeycomb structure with low thermal expansion and having an integrated structure.
- a high specific surface area material such as active alumina and a catalytic metal such as platinum
- alkaline earth metals such as Ba are supported as NOx storage agents for NOx treatment in an oxygen-rich atmosphere such as lean burn engines and diesel engines.
- the above-described prior art has the following problems. Sintering of a high specific surface area material such as alumina progresses due to thermal aging, and the specific surface area decreases. Further, the supported catalyst metal such as platinum is condensed and coagulated, the particle size is large, and the specific surface area is small. In other words, in order to have a higher specific surface area after thermal aging (used as a catalyst support), it is necessary to increase the specific surface area in the initial stage. As described above, in order to further improve the purification performance, it is necessary to increase the probability of contact between the exhaust gas and the catalytic noble metal and NOx storage agent. In other words, it is important that the carrier has a higher specific surface area and the catalyst metal particles are smaller and more dispersed.
- the surface of the cordierite-based honeycomb structure as disclosed in Japanese Patent Application Laid-Open No. 10-263416 is important.
- a high metal such as activated alumina and a catalytic metal such as platinum
- the cell shape, cell density, wall thickness, etc. are devised in order to increase the probability of contact with exhaust gas.
- the specific surface area was increased, it was still not large enough, so that the catalyst metal was not sufficiently dispersed and the purification performance of exhaust gas after thermal aging was insufficient. Therefore, in order to capture this deficiency, attempts have been made to solve the problem by supporting a large amount of catalyst metal and increasing the size of the catalyst carrier itself.
- precious metals such as platinum are very expensive and have limited valuable resources.
- the installation space can both did appropriate means der Rutowaie because it was very limited.
- honeycomb structure disclosed in Japanese Patent Application Laid-Open No. Hei 5-2-13681, in which a material having a high specific surface area is extruded together with inorganic fibers and an inorganic binder, is formed of a material having a high specific surface area. Specific surface area is sufficient Although the catalyst metal can be highly dispersed, the alumina and other materials of the base material cannot be sintered sufficiently to maintain the specific surface area, and the strength of the base material was very weak. . Furthermore, as mentioned above, when used for automobiles, the space for installation is very limited.
- the present invention has been made in view of such a problem, and an object of the present invention is to provide a honeycomb structure that can disperse a catalyst component at a high level and increase the strength against thermal shock and vibration.
- honeycomb structure of the present invention employs the following means to achieve the above object.
- the present invention is a.
- It has a plurality of through holes and includes at least the inorganic material family of the first mode and the inorganic material of the second mode, and has a cross-sectional area of 5 to 50 cm 2 on a surface orthogonal to the through holes.
- a porous honeycomb unit
- a sealing material layer that joins two or more of the porous honeycomb units on an outer surface where the through hole is not opened;
- This honeycomb structure has a structure in which a plurality of porous honeycomb units are joined via a sealing material layer, so that the strength against thermal shock and vibration can be increased. It is presumed that the reason for this is that even when the honeycomb structure has a temperature distribution due to a sudden temperature change or the like, the temperature difference applied to each porous honeycomb unit can be reduced. Alternatively, it is presumed that this is because thermal shock and vibration can be mitigated by the sealing material layer. In addition, even when a crack occurs in the porous honeycomb unit due to thermal stress or the like, the sealing material layer prevents the crack from extending to the entire honeycomb structure, and further serves as a frame of the honeycomb structure.
- the size of the porous honeycomb unit area of the cross section perpendicular to the through-hole (simply referred to as the cross-sectional area.
- the force S less than 5 cm 2
- seal for joining a plurality of porous honeycomb units As the cross-sectional area of the material layer increases, the specific surface area for supporting the catalyst becomes relatively small, and the pressure loss becomes relatively large.
- the cross-sectional area exceeds 5 O cm 2 , the size of the unit increases. It is too large to sufficiently suppress the thermal stress generated in each honeycomb unit. That is, the cross-sectional area of the unit that was in the range of.
- the catalyst component can be highly dispersed and the strength against thermal shock and vibration can be increased.
- the cross-sectional area means that the honeycomb structure has a different cross-sectional area.
- the cross-sectional area of the porous honeycomb unit which is the basic unit constituting the honeycomb structure, is generally the cross-sectional area of the porous honeycomb unit. .
- the ratio of the total cross-sectional area of the porous honeycomb unit to the cross-sectional area of the honeycomb structure is preferably 85% or more, and more preferably 90% or more. If this ratio is less than 85%, the cross-sectional area of the sealing material layer increases, and the total cross-sectional area of the porous honeycomb unit decreases, so that the specific surface area for supporting the catalyst becomes relatively small, and the pressure loss increases. Are relatively large. In addition, when the ratio force is 90% or more, the pressure loss can be further reduced.
- a porous honeycomb unit having a plurality of through holes, including at least the inorganic material of the first mode and the inorganic material of the second mode, and having a cross-sectional area of a surface orthogonal to the through holes of 50 cm 2 or less;
- a sealing material layer that joins two or more of the porous honeycomb units on an outer surface where the through hole is not opened;
- the ratio of the total cross-sectional area of the porous honeycomb unit to the cross-sectional area of the honeycomb structure is 85% or more.
- This honeycomb structure has a structure in which a plurality of porous honeycomb units are joined via a sealing material layer, so that the strength against thermal shock and vibration can be increased. It is presumed that the reason for this is that even when the honeycomb structure has a temperature distribution due to a sudden temperature change or the like, the temperature difference applied to each porous honeycomb unit can be reduced. Alternatively, it is presumed that this is because thermal shock and vibration can be mitigated by the sealing material layer. In addition, this sealing material layer is made of porous honeycomb by thermal stress or the like.
- the crack is prevented from extending to the entire honeycomb structure, and also plays a role as a frame of the honeycomb structure, maintains the shape of the honeycomb structure, and serves as a catalyst carrier. It is thought that the function will not be lost. If the cross-sectional area of the porous honeycomb unit exceeds 50 cm 2 , the size of the unit is too large and the thermal stress generated in each honeycomb unit cannot be sufficiently suppressed. In addition, the cross-sectional area is preferably 50 cm 2 or less because the effect of the sealing material layer on buffering thermal stress and vibration is reduced.
- the ratio of the total cross-sectional area of the porous honeycomb unit to the cross-sectional area of the honeycomb structure is less than 85%, the cross-sectional area of the material other than the porous honeycomb unit becomes large, and the specific surface area for supporting the catalyst becomes large.
- This ratio is preferably in the range of 85% or more, more preferably 90% or more, since the pressure loss becomes relatively large while the pressure loss becomes relatively small. Therefore, according to the honeycomb structure, the catalyst component can be highly dispersed and the strength against thermal shock and vibration can be increased.
- the cross-sectional area refers to a cross-sectional area of a porous honeycomb unit serving as a basic unit constituting the honeycomb structure, and is generally used.
- the porous honeycomb unit has the largest cross-sectional area.
- the honeycomb structure of the present invention may include a coating material layer that covers the outer peripheral surface of the two or more porous honeycomb units joined by the seal material layer, where the through hole is not open. By doing so, the outer peripheral surface can be protected and the strength can be increased.
- the shape of the honeycomb structure joined with the porous honeycomb units is not particularly limited, but may be any shape and size, for example, a columnar shape, a prismatic shape, or an elliptic cylindrical shape. You may.
- the inorganic material of the second mode is porous. It may have a function as a reinforcing material for the quality honeycomb unit. In this case, the strength of the porous honeycomb unit is improved by the inorganic material of the second embodiment.
- the inorganic material of the first mode is an inorganic material having a predetermined aspect ratio (long side Z short side), and the inorganic material of the second mode is the predetermined mode.
- An inorganic material having an aspect ratio larger than the ratio may be used.
- the strength of the porous honeycomb unit is improved by the inorganic material of the second embodiment having a large aspect ratio.
- the aspect ratio of the inorganic material of the second embodiment is preferably 2 to: L000, more preferably 5 to 800, and most preferably 10 to 500.
- the aspect ratio of the inorganic material of the second embodiment is less than 2, the contribution to the improvement of the strength of the honeycomb structure may be small. If the aspect ratio exceeds 1 000, clogging or the like tends to occur in a molding die during molding. In some cases, the moldability may be deteriorated, and the inorganic material may have a broken length at the time of molding such as extrusion molding, and the contribution to the improvement of the strength of the honeycomb structure may be reduced.
- the average value may be used.
- the inorganic material of the first mode may be ceramic particles
- the inorganic material of the second mode may be inorganic fibers.
- the specific surface area is improved by the ceramic particles, and the strength of the porous honeycomb unit is improved by the inorganic fibers.
- the inorganic material of the first mode is ceramic particles having a predetermined particle size
- the inorganic material of the second mode has a particle size larger than the predetermined particle size. Ceramic particles may be used. In this case, the strength of the porous honeycomb unit is improved by the ceramic particles having a large particle diameter.
- the inorganic material of the second form is not less than 5 times the predetermined particle size.
- the particle size is preferably above, and more preferably 10 to 30 times the predetermined particle size.
- the ceramic particles of the inorganic material of the second embodiment preferably have a particle size of 10 to 60 m, more preferably 20 to 50 ⁇ m.
- the strength of the honeycomb structure cannot be sufficiently increased, and if it exceeds 60 ⁇ , the molding die tends to be clogged during molding, and the moldability may be deteriorated.
- the average value may be used.
- the ceramic particles of the inorganic material of the second embodiment may be of a different type from the above-described ceramic particles of the inorganic material of the first embodiment, or may be ceramic particles of the inorganic material of the first embodiment.
- the strength of the honeycomb structure can be increased by the size of the particle, so that the aspect ratio of the inorganic material of the first embodiment is lower than that of the inorganic material of the first embodiment. It may be the same.
- the ceramic particles contained in the honeycomb structure are not particularly limited, but may be any one.
- one or more kinds of particles selected from silicon carbide, silicon nitride, alumina, silica, zirconia, titania, ceria, and mullite can be mentioned, and among them, alumina is preferable.
- the inorganic fibers contained in the honeycomb structure are not particularly limited, One or more inorganic fibers selected from alumina fibers, silicium fibers, silicon carbide fibers, silica alumina fibers, glass fibers and potassium titanate fibers.
- the amount of the first form of the inorganic material contained in the honeycomb structure is preferably from 30-9 7 weight 0/0, preferably from 30-9 0 wt 0/0 power S, 4 0 to 80% by weight is more preferred, and 50-75% by weight is most preferred.
- the content of the inorganic material of the first mode is less than 30% by weight, the amount of the inorganic material of the first mode that contributes to the improvement of the specific surface area is relatively small, so that the specific surface area of the honeycomb structure is low.
- the catalyst component is small, the catalyst component cannot be highly dispersed.
- the content exceeds 90% by weight, the amount of the second form of inorganic material (inorganic fiber, etc.) that contributes to the strength improvement is relatively small. Therefore, the strength of the honeycomb structure is reduced.
- the amount of the second form of the inorganic material contained in the honeycomb structure is preferably from 3 to 70 weight 0/0, preferably from 3 to 50 weight 0/0 power S, 5 to 40 by weight% Is more preferable, and 8 to 30% by weight is most preferable.
- the content of the inorganic material of the second embodiment is less than 3% by weight, the strength of the honeycomb structure is reduced, and the weight is 50% by weight.
- the inorganic material of the first embodiment contributes to the specific surface area increase (ceramic particles, etc.) because the amount is relatively small, the ha - carrying a small specific surface area catalyst components as a cam structure In this case, the catalyst component cannot be highly dispersed.
- the porous honeycomb unit may further include an inorganic binder.
- the inorganic binder contained in the honeycomb structure is not particularly limited, and examples thereof include an inorganic sol-clay binder.
- examples of the inorganic sol include one or more inorganic sols selected from the group consisting of alumina sol, silica sol, titania sol, and water glass.
- examples of the clay-based binder include one or two or more clays selected from clay, kaolin, montmorillonite, double-chained clay (sepiolite, attapulgite), and the like.
- Earth-based pindas can be fisted.
- the shape of the porous honeycomb unit is not particularly limited, it is preferable that the shape be such that the porous honeycomb units are easily joined to each other.
- the same applies hereinafter.) May be square, rectangular, hexagonal, or fan-shaped.
- FIG. 1 (a) a conceptual diagram of a rectangular parallelepiped porous honeycomb unit 11 having an IE cross section is shown in FIG. 1 (a).
- the porous honeycomb unit 11 has a large number of through holes 12 from the near side to the far side, and has an outer surface 13 without the through holes 12.
- the wall thickness between the through holes 12 is not particularly limited.
- the force S is preferably in a range of 0.05 to 0.35 mm, more preferably 0.10 to 0.30 mm, more preferably 0.15 to 0.35 mm. 0.25 mm is most preferred. If the wall thickness is less than 0.05 mm, the strength of the porous honeycomb unit will decrease.If the wall thickness exceeds 0.35 mm, the contact area with the exhaust gas will be small and the gas will not penetrate sufficiently deep, so it will be carried inside the wall. This is because the contact between the catalyst and the gas becomes difficult, and the catalyst performance is reduced.
- the number of through holes per unit sectional area is preferably 15.5 to 186 Zcm 2 (100 to 1200 cpsi) force S, and 46.5 to 170.5 ⁇ @ / cm 2 (300 to 1100 cpsi) force S More preferably, 62.0 to 155 / cm 2 (400 to 1000 cpsi) power is most preferable.
- the power of the through hole is 5.5. If the power is less than 5.5 cm 2 , the area of the wall in contact with the exhaust gas inside the porous honeycomb unit is considered. This is because, when the value is smaller and exceeds 186 Zcm 2 , the pressure loss increases, and it becomes difficult to manufacture a porous honeycomb unit.
- the shape of the through-hole formed in the porous honeycomb unit is not particularly limited.
- the cross section may be substantially triangular or substantially hexagonal.
- the strength of the porous honeycomb unit (for example, isostatic strength) can be increased by increasing the strength of the porous honeycomb unit without reducing the pressure loss and the exhaust gas purification performance.
- Fig. 2 (a) shows that the through-holes 12 having a triangular cross-section are formed alternately up and down.
- Figure 2 (b) shows a through-hole 12 with a triangular cross-section and a quadrilateral with the vertices of each triangle facing each other
- Fig. 2 (c) shows a through-hole 12 with a hexagonal cross-section.
- the through-holes 12 may be formed in the porous honeycomb unit 11 as described above.
- the size of the porous honeycomb units to be the honeycomb structure although preference is given to those cross-sectional area is 5 to 50 cm 2, more preferably not to be having 6 to 40 cm 2, most 8 to 30 cm 2 preferable.
- the cross-sectional area is in the range of 5 to 50 cm 2 , the ratio of the sealing material layer to the honeycomb structure can be adjusted.
- the specific surface area per unit volume of the honeycomb structure can be kept large, the catalyst component can be highly dispersed, and the honeycomb structure can be formed even when external force such as thermal shock or vibration is applied. Can be maintained.
- the cross-sectional area is preferably 5 cm 2 or more from the viewpoint of reducing the pressure loss. Further, the specific surface area per unit volume can be obtained by the following equation (1).
- extrusion molding or the like is performed using a raw material paste containing the above-described inorganic material of the first embodiment, the inorganic material of the second embodiment, and an inorganic binder as main components, to produce a honeycomb unit molded body.
- An organic binder, a dispersion medium, and a molding aid may be appropriately added to the raw material paste in accordance with moldability.
- the organic binder is not particularly limited. Examples thereof include one or more organic binders selected from methylcellulose, canolepoxymethinoresenololose, hydroxyethinoresenololose, polyethylene glycol phenol resin and epoxy resin.
- the compounding amount of the organic binder is preferably from 1 to 10 parts by weight based on 100 parts by weight of the inorganic material of the first embodiment, the inorganic material of the second embodiment, and the inorganic binder in total.
- the dispersion medium is not particularly restricted but includes, for example, water, organic solvents (such as benzene) and alcohols (such as methanol).
- the shaping aid include, but are not particularly limited to, ethylene glycol, dextrin, fatty acid salt, and polyalcohol.
- the raw material paste is not particularly limited, but is preferably mixed and kneaded.
- the raw material paste may be mixed using a mixer or an attritor, or may be sufficiently kneaded using a kneader or the like.
- the method for molding the raw material paste is not particularly limited, but is preferably, for example, formed into a shape having through holes by extrusion molding or the like.
- the obtained molded body is preferably dried.
- the dryer used for drying is not particularly limited, and examples thereof include a microwave dryer, a hot air dryer, a dielectric dryer, a reduced-pressure dryer, a vacuum dryer, and a freeze dryer.
- the obtained molded body is preferably degreased.
- the conditions for degreasing are not particularly limited, and are appropriately selected depending on the type and amount of the organic substance contained in the molded article, but are preferably about 400 ° C. and 2 hours.
- the obtained molded body is preferably fired.
- the sintering conditions are not particularly limited, but a force of 600 to 120 ° C. is preferable, and a temperature of 600 to 1,000 ° C. is more preferable.
- the sealing material is not particularly limited.For example, a material obtained by mixing an inorganic binder and ceramic particles, a material obtained by mixing an inorganic binder and inorganic fibers, or a material obtained by mixing an inorganic binder, ceramic particles and inorganic fibers are used. Can be used. Further, an organic binder may be added to these sealing materials.
- the organic binder is not particularly limited, and examples thereof include one or more organic binders selected from polybutyl alcohol, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, and the like.
- the thickness of the sealing material layer for joining the porous honeycomb unit is preferably 0.5 to 2 mm. If the thickness of the sealing material layer is less than 0.5 mm, sufficient bonding strength may not be obtained. In addition, since the sealing material layer does not function as a catalyst carrier, if the thickness exceeds 2 mm, the specific surface area per unit volume of the honeycomb structure is reduced. Can not be done. If the thickness of the sealing material layer exceeds 2 mm, the pressure loss may increase.
- the number of the porous honeycomb units to be joined may be appropriately determined according to the size of the honeycomb structure used as the honeycomb catalyst. Further, the joined body obtained by joining the porous honeycomb units with the sealing material may be appropriately cut and polished according to the shape and size of the honeycomb structure.
- Coating is applied to the outer peripheral surface (side surface) of the honeycomb structure where the through holes are not open.
- a coating material may be applied, dried, and fixed to form a coating material layer. This can protect the outer peripheral surface and increase the strength.
- the coating material is not particularly limited, but may be made of the same material as the seal material or a material different therefrom. Further, the coating material may have the same compounding ratio as the sealing material, or may have a different compounding ratio.
- the thickness of the coating material layer is not particularly limited, but is preferably 0.1 to 2 mm.
- the degreasing can be performed.
- the conditions for calcination may be appropriately determined depending on the type and amount of the organic substance contained, but preferably at about 700 ° C. for 2 hours.
- the honeycomb structure obtained by calcination is used, the organic binder left in the honeycomb structure does not burn and release polluted exhaust gas.
- FIG. 1 (b) a conceptual diagram of a honeycomb structure 10 having a columnar outer shape formed by joining a plurality of rectangular parallelepiped porous honeycomb units 11 each having a square cross section is shown in FIG. 1 (b).
- the porous honeycomb unit 11 is joined by the sealing material layer 14, cut into a columnar shape, and then the coating material layer 16 is used to open the through hole 12 of the honeycomb structure 10. It covers the outer peripheral surface that is not covered.
- a porous honeycomb unit 11 is formed into a fan-shaped cross section or a square cross section, and these are joined together to form a predetermined honeycomb structure (in FIG. 1 (b), a cylindrical shape). ), Cutting and polishing process It may be omitted.
- the use of the obtained two-cam structure is not particularly limited, but is preferably used as a catalyst carrier for purifying exhaust gas of a vehicle.
- diesel 'particulate' filters when used as a catalyst carrier for purifying exhaust gas from diesel engines, diesel 'particulate' filters have a ceramic honeycomb structure, such as silicon carbide, and have the function of filtering particulate matter (PM) in exhaust gas to combust it.
- the honeycomb structure of the present invention may be located on the front side or the rear side of the honeycomb structure of the present invention. When installed on the front side, when the honeycomb structure of the present invention shows a reaction accompanied by heat generation, the honeycomb structure is transmitted to the rear DPF, which can promote the temperature rise during regeneration of the DPF.
- this honeycomb structure can be used not only for the applications described in the above-mentioned technical background, but also for applications that do not support a catalyst component (for example, by adsorbing a gas component or a liquid component). Adsorbent, etc.) can be used without any particular limitation.
- a catalyst component may be supported on the obtained honeycomb structure to form a honeycomb catalyst.
- the solvent component is not particularly limited, but may be a noble metal, an alkali metal compound, an alkaline earth metal compound, an oxide, or the like.
- the noble metal include one or more selected from platinum, palladium, and rhodium
- examples of the alkali metal compound include one or more compounds selected from potassium, sodium, and the like.
- the alkaline earth metal compound for example, compounds such as barium.
- the oxides (such as La .. 75 K .. 25 Mn0 3 ) perovskite and Ce_ ⁇ 2 And the like.
- the obtained honeycomb catalyst is not particularly limited, it can be used, for example, as a so-called three-way catalyst or NOx storage catalyst for purifying automobile exhaust gas.
- the loading of the catalyst component is not particularly limited, but may be carried out after the honeycomb structure is produced, or may be carried out at the stage of the raw material ceramic particles.
- the method for supporting the catalyst component is not particularly limited, but may be, for example, an impregnation method.
- FIG. 1 is a conceptual diagram of a porous honeycomb unit 11 and a honeycomb structure 10 of the present invention
- FIG. 2 is an explanatory view of a through hole 12 formed in the porous honeycomb unit 11 of the present invention
- FIG. 3 is an SEM photograph of the wall surface of the porous honeycomb unit 11 of the present invention.
- FIG. 4 is a table summarizing the manufacturing conditions of Experimental Examples 1 to 29.
- Fig. 5 is a table summarizing the manufacturing conditions of Experimental Examples 1 and 30 to 43,
- FIG. 6 is a table summarizing the manufacturing conditions of Experimental Examples 44 to 51,
- FIG. 7 is an explanatory view of an experimental example in which a plurality of honeycomb units 11 are joined
- FIG. 8 is an explanatory view of an experimental example in which a plurality of honeycomb units 11 are joined
- FIG. 9 is an explanatory view of a vibration device 20
- FIG. 10 is an explanatory diagram of the pressure loss measuring device 40
- FIG. 11 is a table summarizing the measurement results of Experimental Examples 1 to 29 and 44 to 47
- FIG. 12 is a diagram showing the relationship between the cross-sectional area of the honeycomb unit, the weight loss rate and the pressure loss
- Figure 13 is a diagram showing the relationship between the unit area ratio and the weight loss rate and pressure loss
- Fig. 14 is a table summarizing the measurement results of Experimental Examples 1 and 30 to 34
- Fig. 15 is a diagram showing the relationship between the aspect ratio of silica-alumina fiber and the weight loss rate.
- Figure 16 is a table summarizing the measurement results of Experimental Examples 35 to 43,
- FIG. 17 is a diagram showing the relationship between the particle size of ⁇ -alumina and the weight loss rate
- FIG. 18 is a table summarizing the measurement results of Experimental Examples 48 to 51. BEST MODE FOR CARRYING OUT THE INVENTION
- I ⁇ / Remina particles (average particle size 2Myuiotaita,) 40 wt%, silica one alumina yarn ⁇ (average yarn ⁇ 10 m, average fiber ' ⁇ 100 microns Paiiota, Aspect J; spoon 10) 10 wt% And 50% by weight of silica sol (solids concentration 30% by weight), 6 parts by weight of methylcellulose as an organic binder, a small amount of a plasticizer and a lubricant are added to 100 parts by weight of the obtained mixture, and the mixture is further mixed and kneaded. A composition was obtained. Next, this mixed composition was extruded by an extruder to obtain a green compact.
- the green compact was sufficiently dried using a microwave dryer and a hot-air dryer, and kept at 400 ° C for 2 hours to be degreased. After that, it is baked at 800 ° C for 2 hours, baked, prismatic (34.3 mm x 34.3 mm x 150 mm), cell density 93 cells Zcm 2 (600 cpsi), wall thickness 0.2 mm, cell shape
- a rectangular (square) porous honeycomb unit 11 was obtained.
- This porous honeycomb An electron microscope (SEM) photograph of the wall of the unit 11 is shown in FIG. In this porous honeycomb unit 11, it can be seen that the silica-alumina fiber is oriented along the extrusion direction of the raw material paste.
- FIG. 7 (a) shows a joined body in which a plurality of porous honeycomb units 11 are joined as viewed from a surface having a through-hole (hereinafter, referred to as a front surface).
- a sealing material paste is applied to the outer surface 13 of the above-described porous two-cam unit 11 so that the thickness of the sealing material layer 14 is 1 mm, and a plurality of porous honeycomb units 11 are bonded and fixed. It is a thing.
- the joined body is prepared in this manner, and the joined body is cut into a cylindrical shape using a diamond cutter so that the front surface of the joined body is substantially point-symmetric, and the above-described sealing material is applied to a circular outer surface having no through hole.
- the paste was applied to a thickness of 0.5 mm to coat the outer surface.
- honeycomb structure was dried at 120 ° C, held at 700 ° C for 2 hours to degrease the sealing material layer and the coating material layer, and was formed into a cylindrical (143.8 mm diameter x 150 mm height) honeycomb structure.
- the ceramic particle component, unit shape, unit cross-sectional area, and unit area ratio of the honeycomb structure 10 (the ratio of the total cross-sectional area of the porous honeycomb unit to the cross-sectional area of the honeycomb structure; the same applies hereinafter);
- the numerical values such as the sealing material layer area ratio (the ratio of the total cross-sectional area of the sealing material layer and the coating material layer to the cross-sectional area of the honeycomb structure; the same applies hereinafter) are summarized in the table of FIG. Shown in
- the table of FIG. 4 also summarizes the contents of Experimental Examples 2 to 29 described later. All of the samples shown in the table in Figure 4 show that the second form of inorganic material is silica One alumina fiber (average fiber diameter: 10 ⁇ , average fiber length: 10 ⁇ , aspect ratio: 10), and the inorganic binder is silica sol (solid concentration: 30% by weight).
- Fig. 5 shows a summary of the inorganic materials (type, diameter, length, aspect ratio, particle size), unit shape, unit cross-sectional area, etc. of the second embodiment of Experimental Examples 30 to 43 described later. Is shown in the table. All samples shown in the table of FIG.
- the inorganic material of the first embodiment is ⁇ alumina particles, an inorganic Vine Da silica sol (solids concentration 30 wt%), the unit area ratio is 93.5% The area ratio of the material layer is 6.5%.
- the inorganic material of the first form is “y alumina particles (average particle size 2 ⁇ m), and the inorganic material of the second form is silica alumina fiber (average fiber The diameter is 10 zm, the average fiber length is 100 ⁇ , and the aspect ratio is 10).
- a honeycomb structure 10 was manufactured in the same manner as in Experimental Example 1, except that the porous ceramic unit was designed to have the shape shown in the table of FIG. Figures 7 (b), (c), and (d) show the shapes of the joined bodies of Experimental Examples 2, 3, and 4, respectively. Figures 8 (a), (b) and (c) are shown. In Experimental Example 7, since the honeycomb structure 10 was integrally formed, the joining step and the cutting step were not performed.
- the ceramic particles of the inorganic material of the first embodiment were titania particles (average particle size 2 ⁇ m), and the porous ceramic unit was designed so as to have the shape shown in the table in Fig. 4.
- Quality honeycomb unit 11 A honeycomb structure 10 was produced in the same manner as in Experimental Example 1, except that the ceramic particles of the sealing material layer and the coating material layer were titania particles (average particle size: 2 ⁇ m).
- the shape of the conjugate of Example 8-11 are the same as those, respectively, in FIG 7 (a) ⁇ (d) , the shape of the conjugate of Example 12 to 14 are respectively views 8 (a) ⁇ ( Same as c).
- the honeycomb structure 10 was integrally formed.
- the porous ceramic unit was designed in the same manner as in Experimental Example 1 except that the ceramic particles of the inorganic material of the first embodiment were silica particles (average particle size: 2 m) and the porous ceramic unit was designed to have the shape shown in the table in Fig. 4.
- a honeycomb structure 10 was manufactured in the same manner as in Experimental Example 1, except that the porous honeycomb unit 11 was manufactured, and then the ceramic particles of the sealing material layer and the coating material layer were changed to silica particles (average particle size: 2 ⁇ m). .
- the shapes of the joined bodies in Experimental Examples 15 to 18 are the same as those in FIGS. 7A to 7D, respectively, and the shapes of the joined bodies in Experimental Examples 19 to 21 are respectively in FIGS. Same as c).
- the honeycomb structure 10 was integrally formed.
- the ceramic particles of the inorganic material of the first embodiment were zirconia particles (average particle size 2 ⁇ m), and the porous ceramic unit was designed so as to have the shape shown in the table in Fig. 4.
- a honeycomb structure was produced in the same manner as in Experimental Example 1, except that the porous honeycomb unit 11 was manufactured, and the ceramic particles of the sealing material layer and the coating material layer were changed to zirconia particles (average particle size: 2 ⁇ ).
- Body 10 was made. Note that the shapes of the joined bodies of Experimental Examples 22 to 25 are the same as those of FIGS. 7A to 7D, respectively, and the shapes of the joined bodies of Experimental Examples 26 to 28 are respectively shown in FIG. (C). In Experimental Example 28, the honeycomb structure 10 was integrally formed. [Experimental example 29]
- Experimental Example 29 was a commercially available columnar (diameter: 143.8 mm ⁇ x height: 150 mm) cordierite honeycomb structure 10 in which alumina as a catalyst support layer was formed inside the through-hole.
- the cell shape was hexagonal, the cell density was 62 Zcm 2 (400 cpsi), and the wall thickness was 0.18 mm.
- the shape of the honeycomb structure viewed from the front is the same as that of FIG. 8 (c).
- a porous honeycomb unit 11 was manufactured in the same manner as in Experimental Example 1, except that a porous ceramic unit was designed using silica-alumina fibers having the shape shown in the table of FIG. 5 as the inorganic material of the second embodiment.
- a honeycomb structure 10 was produced in the same manner as in Experimental Example 1, except that the silica-alumina fibers of the sealing material layer and the coating material layer were the same as those of the porous ceramic unit.
- the shapes of the joined bodies in Experimental Examples 30 to 34 are the same as those in FIG. 7 (a).
- a porous honeycomb unit 11 was produced in the same manner as in Experimental Example 1 except that a porous ceramic unit was designed using the alumina particles shown in the table of FIG. 5 as the inorganic material of the second embodiment, followed by a sealing material layer. And the coating material layer 22 of the forms state of the non-inorganic gear material cost multi porous porous membrane Sesera Lami Mille Tsu Amblyseius Yu uni Ni'tsu Toto and the same Jiji ⁇ Aarurumiminana grain particles resonator and Shun Mr Tata cheek written real In the same manner as in Experimental Experimental Example 11, a Hahaninikamumu structural structure 1100 was produced and manufactured. . Incidentally, the shape and shape of the joined assembly in Experimental Examples 3366 to 4433 are the same as those in FIG. 77 ((aa)). Yes. .
- the non-organic machine Babai India was changed to Aalluminaminazozol ((concentration of solid and solid body 3300 weight% by weight%)).
- the design and design of the multi-porous ceseraramic mix unit was carried out in the same manner as in Example 11 of the experimental experiment. 1100 was made and manufactured. .
- a honeycomb structure 10 was produced in the same manner as in Experimental Example 1 except that a porous ceramic unit was designed as follows. Specifically, gamma alumina particles (average particle diameter 2 ⁇ ⁇ ,) 40% by weight, a silica one alumina fiber (average fiber diameter 10 [mu] Iotaita, average fiber, ⁇ 100 m, aspect ratio 10) 10 weight 0/0, 15% by weight of inorganic binder
- porous honeycomb unit 11 20 and 35% by weight of water were mixed, and an organic binder, a plasticizer, and a lubricant were added and molded and fired as in Experimental Example 1, to obtain a porous honeycomb unit 11.
- a plurality of the porous honeycomb units 11 were joined by the same sealing material paste as in the first embodiment, and the joined body was cut in the same manner as in the first embodiment to form a coating material layer 16, thereby forming a cylindrical shape ( A two-cam structure 10 having a diameter of 143.8 mm ⁇ and a height of 150 mm) was obtained.
- Example 51 As shown in the table of FIG. 6, a honeycomb structure 10 was produced in the same manner as in Experimental Example 1, except that a porous ceramic unit was designed without mixing an inorganic binder. Specifically, 50% by weight of ⁇ -alumina particles (average particle size 2 m), 15% by weight of silica alumina fiber (average fiber diameter 10 m, average fiber length 100 ⁇ 111, aspect ratio 10) and Water was mixed at 35% by weight, and an organic binder, a plasticizer and a lubricant were added and molded in the same manner as in Experimental Example 1. The molded body was fired at 1000 ° C. to obtain a porous honeycomb unit 11.
- ⁇ -alumina particles average particle size 2 m
- silica alumina fiber average fiber diameter 10 m, average fiber length 100 ⁇ 111, aspect ratio 10
- the specific surface areas of the porous honeycomb units 11 of Experimental Examples 1 to 51 were measured. First, the volumes of the porous honeycomb unit 11 and the sealing material were actually measured, and the ratio A (% by volume) of the unit material to the volume of the honeycomb structure was calculated. Next, the BET specific surface area B (m 2 Zg) per unit weight of the porous honeycomb unit 11 was measured. The BET specific surface area was measured by a one-point method using a BET measuring device (Micromeritics Flow Soap II-1300 manufactured by Shimadzu Corporation) according to JIS-R-1626 (1996) specified by Japanese Industrial Standards. For the measurement, a sample cut into a cylindrical small piece (diameter 15 mm ⁇ X height 15 mm) was used.
- the apparent density C (g / L) of the porous honeycomb unit 11 is calculated from the weight and the volume of the outer shape of the porous honeycomb unit 11, and the specific surface area S (m 2 ZL) of the honeycomb structure is calculated by the following equation (1) ).
- the specific surface area of the honeycomb structure refers to the specific surface area per apparent volume of the honeycomb structure.
- FIG. 9 (b) shows a side view of the vibration device 20.
- the metal casing 21 containing the honeycomb structure was placed on the pedestal 22, and the metal casing 21 was fixed by tightening the substantially U-shaped fixture 23 with the screw 24. Then, the metal casing 21 can vibrate in a state where the pedestal 22 and the fixture 23 are integrated.
- the vibration test was performed at a frequency of 160 Hz, a kneading speed of 30 G, an amplitude of 0.58 mm, a holding time of 10 hr, a room temperature, and a vibration direction of the Z-axis direction (up and down).
- the thermal shock test and the vibration test were alternately repeated 10 times, and the weight TO of the honeycomb structure before the test and the weight Ti after the test were measured, and the weight loss rate G was calculated using the following equation (2).
- Fig. 10 shows the pressure loss measuring device 40.
- the measurement method was as follows. A honeycomb structure in which an alumina mat was wound around the exhaust pipe of a 2L common-rail diesel engine was placed in a metal casing, and pressure gauges were attached before and after the honeycomb structure. The measurement conditions were as follows: the engine speed was set to 1,500 rpm, the torque was set to 50 ⁇ , and the differential pressure 5 minutes after the start of operation was measured.
- Fig. 12 shows the plot of G and pressure loss on the vertical axis, and the plot of the unit area ratio on the horizontal axis and the weight loss rate G and pressure loss of the thermal shock 'vibration repetition test G and pressure loss on the vertical axis. See Figure 13.
- the porous honeycomb unit containing ceramic particles, inorganic fibers, and inorganic binder as main components was used.
- the cross-sectional area of the honeycomb structure is in the range of 5 to 50 cm 2 , it was found that the specific surface area per unit volume of the honeycomb structure was increased and sufficient strength against thermal shock and vibration was obtained. Further, as shown in FIG.
- a cross-sectional area of the porous honeycomb unit 1 1 in a range of 50 cm 2 or less, by the unit area ratio less than 85% For example, it was found that the specific surface area per unit volume of the honeycomb structure could be increased, sufficient strength against thermal shock and vibration was obtained, and the pressure loss was reduced. In particular, when the unit area ratio was 90% or more, the drop in pressure loss was remarkable.
- the experimental examples 1, 30 to 34 in which the aspect ratio of the inorganic fiber was changed, the diameter, length, and aspect ratio of the silica-alumina fiber, the specific surface area of the porous honeycomb unit 11, the honeycomb structure Fig. 14 shows the specific surface area S, thermal shock, and the numerical values of the weight loss rate G and the pressure loss of the vibration repetition test in the table in Fig. 14.
- the horizontal axis indicates the aspect ratio of silica-alumina fiber
- the thermal shock Fig. 15 shows a plot of the weight loss rate G of the repeated test plotted on the vertical axis. From these results, it was found that when the aspect ratio of the inorganic fiber was in the range of 2 to 1,000, sufficient strength against thermal shock and vibration was obtained.
- the experimental examples 48 to 50 in which the porous honeycomb unit 11 was manufactured by changing the type of the inorganic binder and the experimental example 51 in which the inorganic binder was not mixed, and the types of the inorganic binder and the porous honeycomb unit 1 were as follows.
- Figure 1 summarizes the firing temperature, unit area ratio, specific surface area of the porous honeycomb unit, specific surface area S of the honeycomb structure, weight loss rate G of the thermal shock / vibration repetition test G, and pressure loss in Figure 1.
- Table 8 shows. From this result, it was found that when the inorganic binder was not mixed, sufficient strength could be obtained by firing at a relatively high temperature. Also, it was found that when mixing the inorganic binder, sufficient strength could be obtained even when firing at a relatively low temperature. In addition, it was found that even when the inorganic binder was an alumina sol or a clay-based binder, the specific surface area per unit volume of the honeycomb structure 10 could be increased, and sufficient strength against thermal shock vibration could be obtained.
- honeycomb structures 10 of Experimental Examples 1 to 43 were impregnated with a platinum nitrate solution, and adjusted so that the platinum weight per unit volume of the honeycomb structures 10 was 2 gZL.
- a honeycomb catalyst was obtained by holding the catalyst component at 600 ° C for lhr, and it was possible to use it industrially.
- the present invention can be used as a catalyst carrier for purifying exhaust gas of a vehicle, an adsorbent for adsorbing gas components and liquid components, and the like.
Abstract
Description
Claims
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EP04807224.3A EP1717218B1 (en) | 2003-12-26 | 2004-12-10 | Honeycomb structure |
US11/173,056 US7811650B2 (en) | 2003-12-26 | 2005-07-05 | Honeycomb structure |
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JP2004214729A JP4815108B2 (ja) | 2003-12-26 | 2004-07-22 | ハニカム構造体 |
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EP (1) | EP1717218B1 (ja) |
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JP5042633B2 (ja) * | 2005-06-27 | 2012-10-03 | イビデン株式会社 | ハニカム構造体 |
CN101076404B (zh) * | 2005-06-27 | 2010-05-12 | 揖斐电株式会社 | 蜂窝结构体 |
JP5042827B2 (ja) * | 2005-06-29 | 2012-10-03 | イビデン株式会社 | ハニカム構造体 |
JP2007098274A (ja) * | 2005-10-04 | 2007-04-19 | Ibiden Co Ltd | 多孔質ハニカム構造体及びそれを利用した排ガス浄化装置 |
WO2008059607A1 (fr) | 2006-11-16 | 2008-05-22 | Ibiden Co., Ltd. | Procédé permettant de produire une structure en nid d'abeilles et structure en nid d'abeilles ainsi formée |
EP1923373B1 (en) | 2006-11-16 | 2010-01-20 | Ibiden Co., Ltd. | Method for manufacturing honeycomb structured body |
US20080118701A1 (en) | 2006-11-16 | 2008-05-22 | Ibiden Co., Ltd. | Method for manufacturing honeycomb structure, and honeycomb structure |
JPWO2008096413A1 (ja) | 2007-02-06 | 2010-05-20 | イビデン株式会社 | ハニカム構造体 |
WO2008126305A1 (ja) | 2007-03-30 | 2008-10-23 | Ibiden Co., Ltd. | 触媒担持体および排気ガス処理装置 |
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WO2008126306A1 (ja) | 2007-03-30 | 2008-10-23 | Ibiden Co., Ltd. | 触媒担持体 |
WO2008129670A1 (ja) | 2007-04-17 | 2008-10-30 | Ibiden Co., Ltd. | 触媒担持ハニカムおよびその製造方法 |
WO2009050775A1 (ja) | 2007-10-15 | 2009-04-23 | Ibiden Co., Ltd. | ハニカム構造体の製造方法 |
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2004
- 2004-07-22 JP JP2004214729A patent/JP4815108B2/ja not_active Expired - Fee Related
- 2004-12-10 KR KR1020057012351A patent/KR100672259B1/ko not_active IP Right Cessation
- 2004-12-10 WO PCT/JP2004/018866 patent/WO2005063653A1/ja active IP Right Grant
- 2004-12-10 EP EP04807224.3A patent/EP1717218B1/en not_active Not-in-force
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2005
- 2005-07-05 US US11/173,056 patent/US7811650B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
JP4815108B2 (ja) | 2011-11-16 |
EP1717218B1 (en) | 2015-04-15 |
EP1717218A4 (en) | 2008-10-15 |
JP2005349378A (ja) | 2005-12-22 |
KR100672259B1 (ko) | 2007-01-24 |
EP1717218A1 (en) | 2006-11-02 |
US20050266992A1 (en) | 2005-12-01 |
WO2005063653A9 (ja) | 2006-02-23 |
KR20060024330A (ko) | 2006-03-16 |
US7811650B2 (en) | 2010-10-12 |
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