CN109305796B - Honeycomb ceramic filter body for gasoline engine exhaust aftertreatment and preparation method thereof - Google Patents
Honeycomb ceramic filter body for gasoline engine exhaust aftertreatment and preparation method thereof Download PDFInfo
- Publication number
- CN109305796B CN109305796B CN201811184674.6A CN201811184674A CN109305796B CN 109305796 B CN109305796 B CN 109305796B CN 201811184674 A CN201811184674 A CN 201811184674A CN 109305796 B CN109305796 B CN 109305796B
- Authority
- CN
- China
- Prior art keywords
- honeycomb ceramic
- gasoline engine
- honeycomb
- filter body
- basic main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 77
- 238000002360 preparation method Methods 0.000 title abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000010304 firing Methods 0.000 claims abstract description 44
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 24
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical class N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000654 additive Substances 0.000 claims abstract description 23
- 229920002472 Starch Polymers 0.000 claims abstract description 22
- 239000011230 binding agent Substances 0.000 claims abstract description 22
- 239000008107 starch Substances 0.000 claims abstract description 22
- 235000019698 starch Nutrition 0.000 claims abstract description 22
- 239000010687 lubricating oil Substances 0.000 claims abstract description 21
- 239000002952 polymeric resin Substances 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 21
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 21
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 20
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000454 talc Substances 0.000 claims abstract description 20
- 229910052623 talc Inorganic materials 0.000 claims abstract description 20
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 19
- 239000002243 precursor Substances 0.000 claims abstract description 19
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 17
- 235000013399 edible fruits Nutrition 0.000 claims abstract description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 45
- 239000004793 Polystyrene Substances 0.000 claims description 15
- 229920002223 polystyrene Polymers 0.000 claims description 15
- 239000011812 mixed powder Substances 0.000 claims description 14
- 230000000996 additive effect Effects 0.000 claims description 13
- 239000004033 plastic Substances 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 12
- 238000004898 kneading Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 230000032683 aging Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 238000007580 dry-mixing Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 229920000609 methyl cellulose Polymers 0.000 claims description 5
- 239000001923 methylcellulose Substances 0.000 claims description 5
- 235000010981 methylcellulose Nutrition 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims description 5
- 235000019198 oils Nutrition 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 239000002199 base oil Substances 0.000 claims description 4
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 3
- 239000008158 vegetable oil Substances 0.000 claims description 3
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 2
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000012797 qualification Methods 0.000 abstract description 7
- 238000000354 decomposition reaction Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 23
- 239000011257 shell material Substances 0.000 description 9
- 238000003483 aging Methods 0.000 description 7
- 239000011265 semifinished product Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000005022 packaging material Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 235000012424 soybean oil Nutrition 0.000 description 3
- 239000003549 soybean oil Substances 0.000 description 3
- 239000003981 vehicle Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
-
- 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
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/1305—Organic additives
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/131—Inorganic additives
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/1315—Non-ceramic binders
-
- 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
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63432—Polystyrenes
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63436—Halogen-containing polymers, e.g. PVC
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/636—Polysaccharides or derivatives thereof
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/636—Polysaccharides or derivatives thereof
- C04B35/6365—Cellulose or derivatives thereof
-
- 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
- C04B38/0006—Honeycomb structures
-
- 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
- F01N3/0222—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 the structure being monolithic, e.g. honeycombs
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3218—Aluminium (oxy)hydroxides, e.g. boehmite, gibbsite, alumina sol
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/425—Graphite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Filtering Materials (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The invention belongs to the technical field of honeycomb ceramic materials, and particularly relates to a honeycomb ceramic filter body for gasoline engine exhaust aftertreatment, and further discloses a preparation method of the honeycomb ceramic filter body. According to the honeycomb ceramic GPF filter for exhaust aftertreatment of the gasoline engine, talc, raw kaolin, alumina, hydrated alumina and silicon dioxide are used as basic main materials, and a graphene precursor, starch, fruit shell powder, polymer resin, a binder, lubricating oil and a brominated flame retardant are added as additives, so that the decomposition, oxidation and heat release rate of organic matters in the GPF firing process can be effectively inhibited, the radial temperature gradient of the filter is controlled, the firing qualification rate is improved, and meanwhile, the temperature rise rate of a filter firing kiln can be improved by the inhibiting effect of the flame retardant, the firing time is shortened, the energy consumption is reduced, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of honeycomb ceramic materials, and particularly relates to a honeycomb ceramic filter body for gasoline engine exhaust aftertreatment, and further discloses a preparation method of the honeycomb ceramic filter body.
Background
Gasoline Direct Injection (GDI) engines are increasingly used in passenger vehicles due to their advantages such as better dynamic performance and fuel economy. It is expected that the number of GDI engines will step beyond PFI engines in 2020. However, the quality and quantity of particulate matters discharged are remarkably increased due to the fact that fuel of the GDI gasoline engine is directly injected into a cylinder, so that the fuel-air mixture is uneven and the fuel wets the wall. Increasingly stringent regulations require that direct injection gasoline engines remain stable and have low PM emissions over a wider range of operating conditions.
The emission standard of the light automobile pollutants at six stages in China has the limit value of 4.5mg/km for the PM mass emission amount of the particulate matters of the gasoline automobile and the limit value of 6.0 multiplied by 10 for the emission amount of the particulate matters11And the number per km, for the GDI of the gasoline direct injection engine, a gasoline engine honeycomb ceramic particle trap GPF must be installed to meet the emission regulation requirement.
A Gasoline Particulate Filter (GPF) is a ceramic Filter installed in the exhaust system of a Gasoline engine that traps Particulate emissions before they enter the atmosphere. The GPF filtration mechanism is essentially the same as that of a diesel DPF, and the exhaust gas passes through the porous walls at a certain Flow rate, a process known as Wall-Flow (Wall-Flow). The wall flow type particle catcher is composed of honeycomb ceramics with certain pore density, exhaust gas flow is forced to pass through the wall surface of a pore channel by alternately plugging a honeycomb porous ceramic filter body, and particulate matters are captured and filtered in 4 modes of diffusion, interception, gravity and inertia respectively.
The ingredients for the honeycomb ceramic GPF manufacturing process are that additives such as a binder (such as cellulose ether), a dispersant (such as alcohol ether organic matters) and a lubricant (such as oil) are generally required to be added on the basis of basic raw materials (such as kaolin, talc, alumina and the like), and pore-forming agents (such as organic microsphere starch, graphite or shell type and the like) are also required to be added to obtain an ideal microporous structure, so that the content of organic matters in a honeycomb ceramic GPF raw material system is up to more than 30%. During the firing process of the honeycomb ceramic GPF, the lattice effect formed by thousands of cavities inside influences the heat conduction generated by the decomposition and oxidation of organic matters, so that the temperature gradient is formed from the center to the outer edge of the filter body along the radial direction, and if the temperature gradient is too large, the GPF is easy to crack due to the excessive high thermal stress generated inside, and firing waste products are formed. In order to improve the firing yield, the temperature rise rate of an organic matter volatilization section in the GPF firing process must be strictly controlled (generally lower than 5 ℃/h), so that the section is long in time (generally more than 90 h); moreover, even if the temperature rise is strictly controlled, the firing yield of GPF is difficult to reach 90%. Therefore, the traditional GPF firing process (the temperature rise rate is lower than 5 ℃/h) not only has low production efficiency, but also causes energy waste and difficulty in controlling the firing rejection rate due to overlong firing time, so that the traditional GPF firing process also becomes a bottleneck for limiting the development of a GPF production line, and the reduction of the GPF manufacturing cost is severely limited. Therefore, a method for effectively improving the firing yield of the GPF honeycomb ceramics, reducing energy consumption and improving production efficiency needs to be found.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a honeycomb ceramic filter body for gasoline engine exhaust aftertreatment, and further disclose a preparation method thereof, so as to solve the problems of low firing yield and low production efficiency of the honeycomb ceramic filter body for the gasoline engine in the prior art.
In order to solve the technical problem, the honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine is prepared from raw materials including a basic main material and an additive;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
35-45wt% of talc;
4-8wt% of raw kaolin;
10-15wt% of alumina;
20-25wt% of hydrated alumina;
15-20wt% of silicon dioxide;
the additive comprises brominated flame retardant accounting for 3-7wt% of the total amount of the basic main material.
Preferably, the addition amount of the brominated flame retardant accounts for 5wt% of the total amount of the basic main material.
Preferably, the honeycomb ceramic filter body for gasoline engine exhaust aftertreatment comprises the following components in percentage by mass based on the total amount of the basic main materials:
40.30wt% of talc;
6wt% of raw kaolin;
12.70wt% of alumina;
23wt% of hydrated alumina;
18wt% of silica.
The honeycomb ceramic filter body for the gasoline engine exhaust aftertreatment comprises the following components in percentage by mass based on the total amount of the basic main materials:
5-10wt% of a graphene precursor;
5-10wt% of starch;
20-30wt% of fruit stone powder;
5-15wt% of polymer resin;
5-10wt% of a binder;
1-2wt% of lubricating oil.
The honeycomb ceramic filter body for the gasoline engine exhaust aftertreatment comprises the following components in percentage by mass based on the total amount of the basic main materials:
7wt% of a graphene precursor;
8wt% of starch;
25wt% of fruit stone powder;
10wt% of polymer resin;
7.5wt% of a binder;
lubricating oil 1.5 wt%.
The brominated flame retardant comprises brominated polystyrene and/or brominated epoxy resin;
the polymer resin comprises polystyrene, polyacrylic resin and polymethyl methacrylate;
the binder comprises methyl cellulose, hydroxypropyl methyl cellulose, polyvinyl alcohol solution and starch ether;
the lubricating oil comprises base oil, industrial white oil and vegetable oil;
the grain diameter of the fruit kernel powder is 20-40 μm.
The invention also discloses a method for preparing the honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine, which comprises the following steps:
(1) taking selected amounts of the talc, raw kaolin, alumina, hydrated alumina, silicon dioxide, a graphene precursor, starch, nut powder, polymer resin, a binder and a brominated flame retardant, and carrying out dry mixing in vacuum to prepare mixed powder;
(2) adding water and the lubricating oil into the obtained mixed powder, and kneading; then, the kneaded pug is refined into a plastic pug section, and the plastic pug section is subjected to ageing treatment;
(3) extruding the prepared mud segment to prepare a GPF honeycomb structure, and drying to prepare a blank;
(4) and cutting the dried blank to the required height, firing the honeycomb ceramic, and performing punching, hole plugging and edge surrounding treatment to obtain a finished product.
In the step (4), the temperature control process of the honeycomb ceramic firing step includes:
controlling the reaction temperature to rise from room temperature to 150 ℃ within 60-120 min;
controlling the reaction temperature to rise from 150 ℃ to 600 ℃ within 630-690 min;
controlling the reaction temperature to rise from 600 ℃ to 1000 ℃ within 480min of 420-;
controlling the reaction temperature to rise from 1000 ℃ to 1100 ℃ within 240 min;
controlling the reaction temperature to rise from 1100 ℃ to 1200 ℃ within 40-90 min;
controlling the reaction temperature to rise from 1200 ℃ to 1415 ℃ within 660-780 min;
then the reaction is carried out for 8 to 11 hours at 1415 ℃.
In the step (2):
the addition amount of the water accounts for 25-35wt% of the mixed powder;
the temperature of the ageing step is 25 +/-3 ℃, and the relative humidity is 65 +/-5%.
In the step (3), the GPF honeycomb structure has the dimensions of phi (93-143.8) multiplied by (101.6-481mm), 200 and 300 holes per square inch and the wall thickness of 8-10 mil.
The honeycomb ceramic GPF filter body for the exhaust aftertreatment of the gasoline engine takes talc, raw kaolin, alumina, hydrated alumina and silicon dioxide as basic main materials, and is added with a graphene precursor, starch, fruit shell powder, polymer resin, a binder, lubricating oil and a brominated flame retardant as additives, particularly brominated polystyrene and/or brominated epoxy resin brominated flame retardants are selected, so that the decomposition, oxidation and heat release rate of organic matters in the GPF firing process can be effectively inhibited, the radial temperature gradient of the filter body is controlled, the temperature rise rate can be greatly accelerated in the decomposition stage of the organic matters, even if the temperature rise rate is increased to 40 ℃/h from 5 ℃/h, the firing qualification rate of products can still reach more than 93 percent, the firing qualification rate of the products is effectively improved, and meanwhile, the temperature rise rate of a firing kiln of the filter body can be improved by the inhibiting effect of the flame retardant, shorten the firing time, reduce the energy consumption and improve the production efficiency.
The preparation method of the honeycomb ceramic GPF filter body for gasoline engine exhaust aftertreatment, disclosed by the invention, is used for manufacturing the honeycomb ceramic GPF according to the technological process of mixing, kneading, pugging, filtering by a screen, ageing, forming, shaping, drying, cutting, firing, edging, surrounding edge, plugging holes and burning again, and the yield of the prepared honeycomb ceramic is close to 100% by gradient control of the temperature in the firing process, so that the time of the whole firing process is greatly shortened, and the production efficiency is effectively improved.
Drawings
In order that the present disclosure may be more readily and clearly understood, the following detailed description of the present disclosure is provided in connection with specific embodiments thereof and the accompanying drawings, in which,
FIG. 1 is a graph showing temperature control in the firing step in examples 1 to 3 of the present invention;
FIG. 2 is a graph showing the temperature control in the firing step in comparative example 1 of the present invention.
Detailed Description
Example 1
The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine comprises preparation raw materials including basic main materials and additives;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
40.30wt% of talc;
6wt% of raw kaolin;
12.70wt% of alumina;
23wt% of hydrated alumina;
18wt% of silica.
Based on the total amount of the basic main materials, the additive comprises the following components in percentage by mass:
7wt% of a graphene precursor;
8wt% of starch;
25wt% of fruit shell powder;
10wt% of polymer resin (polymethyl methacrylate);
5wt% of a binder (hydroxypropyl methylcellulose);
1.5wt% of lubricating oil (industrial white oil);
brominated polystyrene flame retardant 5.0 wt%.
The preparation method of the honeycomb ceramic filter for the exhaust aftertreatment of the gasoline engine comprises the following steps:
(1) 40.30kg of talc, 6.0kg of raw kaolin, 12.70kg of alumina, 23.0kg of hydrated alumina, 18.0kg of silicon dioxide, 7.0kg of graphene precursor, 8.0kg of starch, 25.0kg of kernel powder, 10.0kg of polymer resin, 7.5kg of binder and 5.0kg of brominated polystyrene flame retardant are sequentially added into a vacuum mixer, and the mixer is started for vacuum dry mixing to prepare a closely-stacked uniform mixture, namely a mixed powder material;
(2) putting the obtained mixed powder into a kneader, adding 47.2kg of water, kneading for 7 minutes, adding 1.5kg of lubricating oil, and further kneading for 10 minutes to obtain original pug; then, pugging the original pug to prepare a plastic pug section, and ageing for 48 hours at the temperature of 25 +/-3 ℃ and the relative humidity of 65 +/-5%;
(3) extruding the obtained plastic mud segment on a forming machine to form a honeycomb structure with phi 143.8 multiplied by 481mm, 300 holes/square inch and 8mil wall thickness, then carrying out microwave shaping, controlling the power to be 100kw and the feeding speed to be 0.5 m/s, and drying for more than 13 hours at 90-130 ℃ to obtain a blank;
(4) cutting the dried green body into a honeycomb ceramic green body semi-finished product with the required height (157.0mm), and firing the green body into honeycomb ceramic according to the GPF firing temperature control curve of the honeycomb ceramic in figure 1, wherein the specific temperature control program comprises the following steps:
controlling the reaction temperature to rise from room temperature to 150 ℃ from the beginning of the reaction to 120 min;
then the reaction temperature is controlled to rise from 150 ℃ to 600 ℃ within 675 min;
then the reaction temperature is controlled to be increased from 600 ℃ to 1000 ℃ within 480 min;
then the reaction temperature is controlled to rise from 1000 ℃ to 1100 ℃ within 200 min;
then the reaction temperature is controlled to be increased from 1100 ℃ to 1200 ℃ within 60 min;
then the reaction temperature is controlled to be increased from 1200 ℃ to 1415 ℃ within 720 min;
then, carrying out heat preservation reaction at 1415 ℃ for 8 hours;
and (5) after the product is fired, punching, plugging holes and surrounding edge treatment are carried out, so that a finished product is obtained. The detection shows that the sintering qualification rate of the product is 100 percent.
Example 2
The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine comprises preparation raw materials including basic main materials and additives;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
40.30wt% of talc;
6wt% of raw kaolin;
12.70wt% of alumina;
23wt% of hydrated alumina;
18wt% of silica.
Based on the total amount of the basic main materials, the additive comprises the following components in percentage by mass:
7wt% of a graphene precursor;
8wt% of starch;
25wt% of fruit shell powder;
10wt% of polymer resin (polystyrene);
5wt% of a binder (methyl cellulose);
1.5wt% of lubricating oil (vegetable soybean oil);
brominated polystyrene flame retardant 3.0 wt%.
The preparation method of the honeycomb ceramic filter for the exhaust aftertreatment of the gasoline engine comprises the following steps:
(1) 40.30kg of talc, 6.0kg of raw kaolin, 12.70kg of alumina, 23.0kg of hydrated alumina, 18.0kg of silicon dioxide, 7.0kg of graphene precursor, 8.0kg of starch, 25.0kg of kernel powder, 10.0kg of polymer resin, 7.5kg of binder and 3.0kg of brominated polystyrene flame retardant are sequentially added into a vacuum mixer, and the mixer is started for vacuum dry mixing to prepare a closely-stacked uniform mixture, namely a mixed powder material;
(2) putting the obtained mixed powder into a kneader, adding 47.2kg of water, kneading for 7 minutes, adding 1.5kg of lubricating oil, and further kneading for 10 minutes to obtain original pug; then, pugging the original pug to prepare a plastic pug section, and ageing for 48 hours at the temperature of 25 +/-3 ℃ and the relative humidity of 65 +/-5%;
(3) extruding the obtained plastic mud segment on a forming machine to form a honeycomb structure with phi 143.8 multiplied by 481mm, 300 holes/square inch and 8mil wall thickness, then carrying out microwave shaping, controlling the power to be 100kw and the feeding speed to be 0.5 m/s, and carrying out drying treatment at 90-130 ℃ for more than 13 hours to obtain a blank;
(4) cutting the dried blank into honeycomb ceramic green semi-finished products with required height (157.0mm), and firing the honeycomb ceramic green semi-finished products into honeycomb ceramics according to a GPF firing temperature control curve of the honeycomb ceramics shown in figure 1, wherein the specific temperature control program comprises the following steps:
controlling the reaction temperature to rise from room temperature to 150 ℃ within 120min from the beginning of the reaction;
then the reaction temperature is controlled to rise from 150 ℃ to 600 ℃ within 675 min;
then the reaction temperature is controlled to be increased from 600 ℃ to 1000 ℃ within 480 min;
then the reaction temperature is controlled to rise from 1000 ℃ to 1100 ℃ within 200 min;
then the reaction temperature is controlled to be increased from 1100 ℃ to 1200 ℃ within 60 min;
then the reaction temperature is controlled to be increased from 1200 ℃ to 1415 ℃ within 720 min;
then, the reaction is carried out for 8 hours at the temperature of 1415 ℃;
and (5) after the product is fired, punching, plugging holes and surrounding edge treatment are carried out, so that a finished product is obtained. The detection shows that the sintering qualification rate of the product is 97.4 percent.
Example 3
The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine comprises preparation raw materials including basic main materials and additives;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
40.30wt% of talc;
6wt% of raw kaolin;
12.70wt% of alumina;
23wt% of hydrated alumina;
18wt% of silica.
Based on the total amount of the basic main materials, the additive comprises the following components in percentage by mass:
7wt% of a graphene precursor;
8wt% of starch;
25wt% of fruit shell powder;
10wt% of polymer resin (polyacrylic acid);
5wt% of a binder (hydroxypropyl methylcellulose);
lubricating oil (base oil) 1.5 wt%;
brominated polystyrene flame retardant 7.0 wt%.
The preparation method of the honeycomb ceramic filter for the exhaust aftertreatment of the gasoline engine comprises the following steps:
(1) 40.30kg of talc, 6.0kg of raw kaolin, 12.70kg of alumina, 23.0kg of hydrated alumina, 18.0kg of silicon dioxide, 7.0kg of graphene precursor, 8.0kg of starch, 25.0kg of kernel powder, 10.0kg of polymer resin, 7.5kg of binder and 5.0kg of brominated polystyrene flame retardant are sequentially added into a vacuum mixer, and the mixer is started for vacuum dry mixing to prepare a closely-stacked uniform mixture, namely a mixed powder material;
(2) putting the obtained mixed powder into a kneader, adding 47.2kg of water, kneading for 7 minutes, adding 1.5kg of lubricating oil, and further kneading for 10 minutes to obtain original pug; then, pugging the original pug to prepare a plastic pug section, and ageing for 48 hours at the temperature of 25 +/-3 ℃ and the relative humidity of 65 +/-5%;
(3) extruding the obtained plastic mud segment on a forming machine to form a honeycomb structure with phi 143.8 multiplied by 481mm, 300 holes/square inch and 8mil wall thickness, then carrying out microwave shaping, controlling the microwave power to be 100kw and the feeding speed to be 0.5 m/s, and carrying out drying treatment at 90-130 ℃ for more than 13 hours to obtain a blank;
(4) cutting the dried blank into a honeycomb ceramic green semi-finished product with the required height (157.0mm), and firing the honeycomb ceramic green semi-finished product into honeycomb ceramic according to the GPF firing temperature control curve of the honeycomb ceramic in figure 1, wherein the specific temperature control program comprises the following steps:
controlling the reaction temperature to rise from room temperature to 150 ℃ within 120min from the beginning of the reaction;
then the reaction temperature is controlled to rise from 150 ℃ to 600 ℃ within 675 min;
then the reaction temperature is controlled to be increased from 600 ℃ to 1000 ℃ within 480 min;
then the reaction temperature is controlled to rise from 1000 ℃ to 1100 ℃ within 200 min;
then the reaction temperature is controlled to be increased from 1100 ℃ to 1200 ℃ within 60 min;
then the reaction temperature is controlled to be increased from 1200 ℃ to 1415 ℃ within 720 min;
then carrying out heat preservation reaction for 8 hours at 1415 ℃;
and (5) after the product is fired, punching, plugging holes and surrounding edge treatment are carried out, so that a finished product is obtained. The detection shows that the sintering qualification rate of the product is 93.2 percent.
Example 4
The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine comprises preparation raw materials including basic main materials and additives;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
35wt% of talc;
5wt% of raw kaolin;
15wt% of alumina;
25wt% of hydrated alumina;
20wt% of silicon dioxide.
Based on the total amount of the basic main materials, the additive comprises the following components in percentage by mass:
5wt% of a graphene precursor;
10wt% of starch;
20wt% of fruit shell powder;
15wt% of polymer resin (polyacrylic resin);
5wt% of binder (polyvinyl alcohol solution);
2wt% of lubricating oil (vegetable soybean oil);
brominated polystyrene flame retardant 3.0 wt%.
The preparation method of the honeycomb ceramic filter for the exhaust aftertreatment of the gasoline engine in the embodiment is the same as that in the embodiment 1.
Example 5
The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine comprises preparation raw materials including basic main materials and additives;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
talc 45 wt%;
4 wt% of raw kaolin;
11 wt% of alumina;
20wt% of hydrated alumina;
20wt% of silicon dioxide.
Based on the total amount of the basic main materials, the additive comprises the following components in percentage by mass:
10wt% of a graphene precursor;
5wt% of starch;
30wt% of fruit shell powder;
5wt% of polymer resin (polyacrylic resin);
10wt% of binder (polyvinyl alcohol solution);
1 wt% of lubricating oil (industrial white oil);
brominated polystyrene flame retardant 7.0 wt%.
The preparation method of the honeycomb ceramic filter for the exhaust aftertreatment of the gasoline engine in the embodiment is the same as that in the embodiment 1.
Example 6
The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine comprises preparation raw materials including basic main materials and additives;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
talc 45 wt%;
8wt% of raw kaolin;
10wt% of alumina;
22 wt% of hydrated alumina;
15wt% of silica.
Based on the total amount of the basic main materials, the additive comprises the following components in percentage by mass:
7wt% of a graphene precursor;
8wt% of starch;
25wt% of fruit shell powder;
10wt% of polymer resin (polyacrylic resin);
5wt% of a binder (methyl cellulose);
lubricating oil (base oil) 1.5 wt%;
brominated polystyrene flame retardant 5.0 wt%.
The preparation method of the honeycomb ceramic filter for diesel engine exhaust gas post-treatment in this example is the same as that of example 1.
Comparative example 1
The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine comprises the preparation raw materials of a basic main material and an additive;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
40.30wt% of talc;
6wt% of raw kaolin;
12.70wt% of alumina;
23wt% of hydrated alumina;
18wt% of silica.
Based on the total amount of the basic main materials, the additive comprises the following components in percentage by mass:
7wt% of a graphene precursor;
8wt% of starch;
25wt% of fruit shell powder;
10wt% of polymer resin (polyacrylic resin);
5wt% of a binder (methyl cellulose);
1.5wt% of lubricating oil (vegetable oil soybean oil).
The preparation method of the honeycomb ceramic filter for the exhaust aftertreatment of the gasoline engine comprises the following steps:
(1) 40.30kg of talc, 6.0kg of raw kaolin, 12.70kg of alumina, 23.0kg of hydrated alumina, 18.0kg of silicon dioxide, 7.0kg of graphene precursor, 8.0kg of starch, 25.0kg of kernel powder, 10.0kg of polymer resin and 7.5kg of binder are sequentially added into a vacuum mixer, and the mixer is started for vacuum dry mixing to prepare a tightly-stacked uniform mixture, namely a mixed powder material;
(2) putting the obtained mixed powder into a kneader, adding 47.2kg of water, kneading for 7 minutes, adding 1.5kg of lubricating oil, and further kneading for 10 minutes to obtain original pug; then, pugging the original pug to prepare a plastic pug section, and ageing for 48 hours at the temperature of 25 +/-3 ℃ and the relative humidity of 65 +/-5%;
(3) extruding the obtained plastic mud segment on a forming machine to form a honeycomb structure with phi 143.8 multiplied by 481mm, 300 holes/square inch and 8mil wall thickness, then carrying out microwave shaping, controlling the microwave power to be 100kw and the feeding speed to be 0.5 m/s, and carrying out drying treatment at 90-130 ℃ for more than 13 hours to obtain a blank;
(4) cutting the dried blank into a honeycomb ceramic green semi-finished product with the required height (157.0mm), and firing the honeycomb ceramic green semi-finished product into honeycomb ceramic according to a GPF firing temperature control curve of the traditional honeycomb ceramic in the prior art shown in figure 2, wherein the specific temperature control program comprises the following steps:
controlling the reaction temperature to rise from room temperature to 150 ℃ within 120min from the beginning of the reaction;
then, the reaction temperature is controlled to be increased from 150 ℃ to 600 ℃ within 5400 min;
then the reaction temperature is controlled to be increased from 600 ℃ to 1000 ℃ within 480 min;
then the reaction temperature is controlled to rise from 1000 ℃ to 1100 ℃ within 200 min;
then the reaction temperature is controlled to be increased from 1100 ℃ to 1200 ℃ within 60 min;
then the reaction temperature is controlled to be increased from 1200 ℃ to 1415 ℃ within 720 min;
then carrying out heat preservation for 8 hours at 1415 ℃; and (5) after the product is fired, punching, plugging holes and surrounding edge treatment are carried out, so that a finished product is obtained. The detection shows that the sintering qualification rate of the product is 80.1 percent.
Examples of the experiments
1. Firing Process parameter testing
The results of measurements of the data such as the product yield in the firing process of the honeycomb ceramics described in examples 1 to 3 and comparative example 1 are shown in table 1 below.
TABLE 1 comparison of firing Process parameter test results
As can be seen from the data in the table, the flame retardant in the honeycomb ceramic has very obvious influence on the heating rate of the organic matter decomposition stage, the total firing time and the product percent of pass in the GPF firing process of the honeycomb ceramic; the addition of 3.0-7.0 wt% of flame retardant can increase the temperature rise rate of organic decomposition stage in GPF firing process from 5 ℃/h to 40 ℃/h, reduce the total firing time from 124.33h to 45.58h, and increase the product percent of pass from 80.1% to 93.2% or even 100%.
2. Honeycomb ceramic product performance test
The performance of the honeycomb ceramic products prepared in the above examples 1 to 3 and comparative example 1 was tested, and the test indexes included the thermal expansion coefficient (room temperature-800 ℃), porosity, average pore diameter, compressive strength parallel to the axial direction (compressive strength of axis a), and thermal shock resistance; and GPF is packaged, and is installed on a gasoline vehicle to carry out a WLTC (global uniform cycle test) of a light vehicle, and the filtering efficiency of the honeycomb ceramic on PM and PN is tested and recorded in the following table 2.
TABLE 2 Honeycomb ceramics Performance test results
From the data in the table, the performance indexes of the honeycomb ceramic filter body prepared by the method can reach the level of the existing product, the performance requirements of the finished GPF product are met, the filtering efficiency of PM and PN exceeds 95%, and the requirement of pollutant emission limit of six-stage light vehicles in China can be met.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine is characterized in that the honeycomb ceramic filter body is prepared from raw materials including basic main materials and additives;
the basic main material comprises the following components in percentage by mass based on the total amount of the basic main material:
35-45wt% of talc;
4-8wt% of raw kaolin;
10-15wt% of alumina;
20-25wt% of hydrated alumina;
15-20wt% of silicon dioxide;
the additive comprises a brominated flame retardant accounting for 3-7wt% of the total amount of the basic main material, wherein the brominated flame retardant comprises brominated polystyrene and/or brominated epoxy resin;
the additive also comprises the following components in percentage by mass:
5-10wt% of a graphene precursor;
5-10wt% of starch;
20-30wt% of fruit stone powder;
5-15wt% of polymer resin;
5-10wt% of a binder;
1-2wt% of lubricating oil.
2. The ceramic honeycomb filter for gasoline engine exhaust gas aftertreatment according to claim 1, wherein the brominated flame retardant is added in an amount of 5wt% based on the total amount of the base main material.
3. The honeycomb ceramic filter body for the exhaust aftertreatment of the gasoline engine according to claim 1 or 2, wherein the basic main material comprises the following components in mass content based on the total amount of the basic main material:
40.30wt% of talc;
6wt% of raw kaolin;
12.70wt% of alumina;
23wt% of hydrated alumina;
18wt% of silica.
4. The honeycomb ceramic filter body for the exhaust gas aftertreatment of the gasoline engine according to claim 1, wherein the additive further comprises the following components in mass content based on the total amount of the basic main materials:
7wt% of a graphene precursor;
8wt% of starch;
25wt% of fruit stone powder;
10wt% of polymer resin;
7.5wt% of a binder;
lubricating oil 1.5 wt%.
5. The ceramic honeycomb filter for gasoline engine exhaust gas aftertreatment according to claim 4, wherein:
the polymer resin comprises polystyrene, polyacrylic resin and polymethyl methacrylate;
the binder comprises methyl cellulose, hydroxypropyl methyl cellulose, polyvinyl alcohol solution and starch ether;
the lubricating oil comprises base oil, industrial white oil and vegetable oil;
the grain size of the kernel powder is 20-40 mu m.
6. A method for preparing a ceramic honeycomb filter for exhaust gas after-treatment of gasoline engines according to any one of claims 1 to 5, comprising the steps of:
(1) taking selected amounts of the talc, raw kaolin, alumina, hydrated alumina, silicon dioxide, a graphene precursor, starch, nut powder, polymer resin, a binder and a brominated flame retardant, and carrying out dry mixing in vacuum to prepare mixed powder;
(2) adding water and the lubricating oil into the obtained mixed powder, and kneading; then, the kneaded pug is refined into a plastic pug section, and the plastic pug section is subjected to ageing treatment;
(3) extruding the prepared mud segment to prepare a GPF honeycomb structure, and drying to prepare a blank;
(4) and cutting the dried blank to the required height, firing the honeycomb ceramic, and performing punching, hole plugging and edge surrounding treatment to obtain a finished product.
7. The method for preparing a ceramic honeycomb filter for exhaust gas after-treatment of gasoline engines according to claim 6, wherein in the step (4), the temperature control process of the honeycomb ceramic firing step comprises:
controlling the reaction temperature to rise from room temperature to 150 ℃ within 60-120 min;
controlling the reaction temperature to rise from 150 ℃ to 600 ℃ within 630-690 min;
controlling the reaction temperature to rise from 600 ℃ to 1000 ℃ within 480min of 420-;
controlling the reaction temperature to rise from 1000 ℃ to 1100 ℃ within 240 min;
controlling the reaction temperature to rise from 1100 ℃ to 1200 ℃ within 40-90 min;
controlling the reaction temperature to rise from 1200 ℃ to 1415 ℃ within 660-780 min;
then the reaction is carried out for 8 to 11 hours at 1415 ℃.
8. The method for preparing a honeycomb ceramic filter for gasoline engine exhaust gas aftertreatment according to claim 6 or 7, wherein in the step (2):
the addition amount of the water accounts for 25-35wt% of the mixed powder;
the temperature of the ageing step is 25 +/-3 ℃, and the relative humidity is 65 +/-5%.
9. The method for preparing the honeycomb ceramic filter body for the exhaust gas aftertreatment of the gasoline engine as recited in claim 6 or 7, wherein in the step (3), the GPF honeycomb structure has the size of phi (93-143.8) × (101.6-481mm), 200-300 holes/square inch and the wall thickness of 8-10 mil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184674.6A CN109305796B (en) | 2018-10-11 | 2018-10-11 | Honeycomb ceramic filter body for gasoline engine exhaust aftertreatment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811184674.6A CN109305796B (en) | 2018-10-11 | 2018-10-11 | Honeycomb ceramic filter body for gasoline engine exhaust aftertreatment and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109305796A CN109305796A (en) | 2019-02-05 |
| CN109305796B true CN109305796B (en) | 2021-08-27 |
Family
ID=65224398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811184674.6A Active CN109305796B (en) | 2018-10-11 | 2018-10-11 | Honeycomb ceramic filter body for gasoline engine exhaust aftertreatment and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109305796B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999035205A1 (en) * | 1998-01-07 | 1999-07-15 | H.B. Fuller Licensing & Financing, Inc. | Flame retardant hot melt compositions |
| CN1697791A (en) * | 2004-08-07 | 2005-11-16 | 威士赢株式会社 | Multiporous ceramic heating element and its mfg. method |
| WO2012024572A2 (en) * | 2010-08-20 | 2012-02-23 | H.B. Fuller Company | Filter including a hot melt adhesive coated continuous substrate |
| CN104830041A (en) * | 2015-05-20 | 2015-08-12 | 中国民用航空总局第二研究所 | Low-thermal-release polycarbonate material and preparation method thereof |
| CN105060920A (en) * | 2015-08-13 | 2015-11-18 | 宜兴王子制陶有限公司 | Component of gasoline engine particulate filter and preparation method of component |
| CN105237029A (en) * | 2015-11-17 | 2016-01-13 | 安徽弘昌新材料有限公司 | Silicon carbide foamed ceramic and preparation method thereof |
| CN106365669A (en) * | 2016-08-31 | 2017-02-01 | 山东奥福环保科技股份有限公司 | Cordierite honeycomb ceramic carrier using complete oxides as raw materials and preparation method thereof |
| CN108178652A (en) * | 2018-03-06 | 2018-06-19 | 山东奥福环保科技股份有限公司 | High-strength thin-walled cordierite honeycomb ceramic of low bulk and preparation method thereof |
| CN108439967A (en) * | 2018-03-27 | 2018-08-24 | 山东奥福环保科技股份有限公司 | A kind of low pressure drop, low-expansion large scale diesel particulate filter and preparation method thereof |
-
2018
- 2018-10-11 CN CN201811184674.6A patent/CN109305796B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999035205A1 (en) * | 1998-01-07 | 1999-07-15 | H.B. Fuller Licensing & Financing, Inc. | Flame retardant hot melt compositions |
| CN1697791A (en) * | 2004-08-07 | 2005-11-16 | 威士赢株式会社 | Multiporous ceramic heating element and its mfg. method |
| WO2012024572A2 (en) * | 2010-08-20 | 2012-02-23 | H.B. Fuller Company | Filter including a hot melt adhesive coated continuous substrate |
| CN104830041A (en) * | 2015-05-20 | 2015-08-12 | 中国民用航空总局第二研究所 | Low-thermal-release polycarbonate material and preparation method thereof |
| CN105060920A (en) * | 2015-08-13 | 2015-11-18 | 宜兴王子制陶有限公司 | Component of gasoline engine particulate filter and preparation method of component |
| CN105237029A (en) * | 2015-11-17 | 2016-01-13 | 安徽弘昌新材料有限公司 | Silicon carbide foamed ceramic and preparation method thereof |
| CN106365669A (en) * | 2016-08-31 | 2017-02-01 | 山东奥福环保科技股份有限公司 | Cordierite honeycomb ceramic carrier using complete oxides as raw materials and preparation method thereof |
| CN108178652A (en) * | 2018-03-06 | 2018-06-19 | 山东奥福环保科技股份有限公司 | High-strength thin-walled cordierite honeycomb ceramic of low bulk and preparation method thereof |
| CN108439967A (en) * | 2018-03-27 | 2018-08-24 | 山东奥福环保科技股份有限公司 | A kind of low pressure drop, low-expansion large scale diesel particulate filter and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 机动车尾气净化用堇青石蜂窝陶瓷研究中的若干问题;王炜 等;《科技导报》;20111231;第29卷(第31期);第70-74页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109305796A (en) | 2019-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7704442B2 (en) | Process for producing honeycomb structure | |
| CN1434000A (en) | Method for manufacturing porous ceramic structure | |
| CN107746279B (en) | Al4SiC4Al composite reinforced silicon carbide honeycomb ceramic and preparation method thereof | |
| CN113860852A (en) | Cordierite gasoline engine particulate trap and preparation method thereof | |
| CN103601480A (en) | Filter body for trapping carbon cigarette pellets of diesel engine and preparation method thereof | |
| CN104387108A (en) | Supersize cordierite honeycomb ceramic carrier and production technique thereof | |
| US8097203B2 (en) | Crosslinked green body articles and method of manufacturing porous ceramic articles therefrom | |
| CN108439967B (en) | Large-size diesel particle filter with low pressure drop and low expansion coefficient and preparation method thereof | |
| JP2012504092A (en) | Method for producing porous SiC material | |
| CN102701776A (en) | Manufacturing method of filter core of catcher for catching silicon carbide mass particles in diesel engine exhaust | |
| CN110143825B (en) | Cordierite ceramic honeycomb filter body with narrow pore diameter distribution and preparation method thereof | |
| CN105481367A (en) | Filter for trapping diesel engine soot particles, and making method thereof | |
| CN108298987A (en) | A kind of filtering body and preparation method thereof for diesel emission particulate trapping | |
| CN111718190A (en) | Method for manufacturing ceramic honeycomb structure | |
| CN115108819A (en) | Large-size thin-wall narrow-pore-size-distribution wall-flow honeycomb ceramic catalyst carrier and preparation method thereof | |
| CN109305796B (en) | Honeycomb ceramic filter body for gasoline engine exhaust aftertreatment and preparation method thereof | |
| KR101351468B1 (en) | Manufacturing method of diesel particulate filter and diesel particulate filter manufactured by the method | |
| US9205362B2 (en) | Methods for manufacturing particulate filters | |
| CN115893983A (en) | Method for preparing honeycomb ceramic carrier by using honeycomb ceramic carrier green compact and carrier | |
| CN108997007B (en) | Honeycomb ceramic filter body for diesel engine exhaust aftertreatment and preparation method thereof | |
| CN102584315B (en) | Synthetic method of catalyst carrier for automobile tail gas purifier | |
| KR101807833B1 (en) | A process for the preparation of ceramic honeycomb catalyst supporter having a low coefficient of expansion and the ceramic honeycomb catalyst supporter prepared therefrom | |
| CN114057474B (en) | Large-size ultrathin-wall honeycomb ceramic catalyst carrier and preparation method and application thereof | |
| JP2002234780A (en) | Method for producing porous ceramic honeycomb structure | |
| JP2007045681A (en) | Method of manufacturing porous ceramic structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |