CN108043397A - Integral vehicular tai-gas clean-up catalyst with porous structure and preparation method thereof - Google Patents
Integral vehicular tai-gas clean-up catalyst with porous structure and preparation method thereof Download PDFInfo
- Publication number
- CN108043397A CN108043397A CN201711139840.6A CN201711139840A CN108043397A CN 108043397 A CN108043397 A CN 108043397A CN 201711139840 A CN201711139840 A CN 201711139840A CN 108043397 A CN108043397 A CN 108043397A
- Authority
- CN
- China
- Prior art keywords
- catalyst
- porous structure
- matrix
- ceo
- tai
- 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.)
- Granted
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 102
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000011159 matrix material Substances 0.000 claims abstract description 36
- 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 30
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 24
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 21
- 230000003197 catalytic effect Effects 0.000 claims abstract description 17
- 239000006255 coating slurry Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 16
- 229920000620 organic polymer Polymers 0.000 claims description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 11
- 229910052878 cordierite Inorganic materials 0.000 claims description 11
- 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 claims description 11
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000007767 bonding agent Substances 0.000 claims description 6
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid group Chemical group C(CC(O)(C(=O)O)CC(=O)O)(=O)O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 5
- 229960000583 acetic acid Drugs 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 5
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 4
- -1 aliphatic ester Chemical class 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- 229940024545 aluminum hydroxide Drugs 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 229930006000 Sucrose Natural products 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 claims description 2
- 239000011268 mixed slurry Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 239000005720 sucrose Substances 0.000 claims description 2
- 125000000185 sucrose group Chemical group 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims 2
- 239000004793 Polystyrene Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 229920002223 polystyrene Polymers 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 239000011347 resin Substances 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 31
- 238000012360 testing method Methods 0.000 description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 15
- 229910002091 carbon monoxide Inorganic materials 0.000 description 15
- 239000000843 powder Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 239000004215 Carbon black (E152) Substances 0.000 description 10
- 229930195733 hydrocarbon Natural products 0.000 description 10
- 150000002430 hydrocarbons Chemical class 0.000 description 10
- 241000264877 Hippospongia communis Species 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 9
- 229910017585 La2O3 Nd2O3 Inorganic materials 0.000 description 8
- 230000032683 aging Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910001868 water Inorganic materials 0.000 description 4
- 239000012876 carrier material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 235000012501 ammonium carbonate Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000000975 co-precipitation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-O oxonium Chemical compound [OH3+] XLYOFNOQVPJJNP-UHFFFAOYSA-O 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011232 storage material Substances 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- 229910016287 MxOy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- TZIBOXWEBBRIBM-UHFFFAOYSA-N cerium(3+) oxygen(2-) titanium(4+) Chemical compound [O--].[O--].[Ti+4].[Ce+3] TZIBOXWEBBRIBM-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 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
- 238000007598 dipping method Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium oxide Inorganic materials [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals with rare earths or actinides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0219—Coating the coating containing organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/084—Decomposition of carbon-containing compounds into carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Integral vehicular tai-gas clean-up catalyst of the present invention with porous structure, it is made of matrix and the catalyst layer for being covered on matrix and being combined as a whole with matrix, the catalyst layer is with nanometer to the porous structure layer of micron order hole, and the catalyst contained by catalyst layer is using Pt or/and Pd as catalytic active component, with Al2O3Material or/and the three-way catalyst that hydrogen-storing material is carrier, upper carrying capacity of the catalyst on matrix are 120~180g/L.The present invention also provides the preparation methods of above-mentioned catalyst.The integral vehicular tai-gas clean-up catalyst with porous structure is with good catalytic activity, durability and thermal stability.
Description
Technical field
The invention belongs to motorcycle tail gas cleaning fields, are related to a kind of integral catalyzer for motorcycle tail gas cleaning
And preparation method thereof.
Background technology
Motor-vehicle tail-gas is one of main source of atmosphere pollution, major pollutants hydrocarbon (HC) therein,
Oxynitrides (NOx), carbon monoxide (CO) and particulate matter (PM) not only cause serious environmental pollution, be also carcinogen,
Endanger the health of the mankind.China's motorcycle ownership ranks first in the world, motorcycle bicycle mileage discharge capacity in current standard
It is suitable with gasoline car, therefore purify motorcycle exhaust and be of great significance for reducing atmosphere pollution.Three-way catalyst (TWCs)
Refer to simultaneously to turn HC, oxynitrides (NOx), the carbon monoxide (CO) in motor-vehicle tail-gas under the conditions of chemically correct fuel
It is melted into harmless H2O, CO2And N2Catalyst.Since the 1980s, using Pt, Pd as active component, titanium dioxide
Cerium starts to be applied to motor vehicle tail-gas purifying as the three-way catalyst of storage oxygen release component.According to specific requirement, TWCs
Cerium-based oxygen storage material experienced CeO2,CeO2-ZrO2,CeO2-ZrO2-MxOyThe development course of (M represents Doped ions).With more
Come stringenter emission regulation, the requirement of state IV motorcycle emissions standard HC, CO and NOxDischarge decline 50%, catalyst is durable
Mileage further improves.And in practice due to the use of electric jet technology, the NO in tail gasxIncreasing.In addition, motorcycle engine
High rotating speed requirement catalyst need to adapt to higher air speed (150000h-1), when motorcycle exhaust is up to 150000h-1Air speed meeting
Cause tail gas and catalyst activity component time of contact shorter, and with the rise of temperature, the thermal resistance problem that tail gas is spread is more next
It is more apparent.This requires catalyst performance and technique complete upgrading.
Existing motorcycle tail gas cleaning catalyst is to form three-way catalyst coated in cordierite honeycomb ceramic matrix
Integral catalyzer, catalyst layer are compact texture, are restricted with gas interface and gas transmission rate, influence to urge
The activity of agent.Research is concentrated mainly on the preparation method by optimizing cerium-based oxygen storage material at present, improves the texture of material
Can, the autohemagglutination of inhibitory activity point is sintered to improve the durability of catalyst and improve catalyst coat technique to urge to improve
The high-speed performance of agent.But still have much room for improvement in terms of catalytic activity, durability and thermal stability.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of integral vehicular tail with porous structure
Gas cleaning catalyst and preparation method thereof, to improve the catalytic activity of such catalyst, durability and thermal stability.
Integral vehicular tai-gas clean-up catalyst of the present invention with porous structure by matrix and is covered on matrix
And the catalyst layer being combined as a whole with matrix is formed, the catalyst layer is with nanometer to the porous structure of micron order hole
Layer, the catalyst contained by catalyst layer is using Pt or/and Pd as catalytic active component, with Al2O3Material or/and hydrogen-storing material are
The three-way catalyst of carrier, upper carrying capacity of the catalyst on matrix are 120~180g/L.
The above-mentioned integral vehicular tai-gas clean-up catalyst with porous structure, the Al2O3Material is Al2O3Or through helping
Agent BaO, SrO, La2O3、Y2O3In a kind of modification Al2O3。
The above-mentioned integral vehicular tai-gas clean-up catalyst with porous structure, the hydrogen-storing material are CeO2、CeO2-
ZrO2、CeO2-ZrO2-Al2O3, doped chemical be modified CeO2, doped chemical be modified CeO2-ZrO2, doped chemical be modified
CeO2-ZrO2-Al2O3In one kind.
The above-mentioned integral vehicular tai-gas clean-up catalyst with porous structure, the doped chemical is Y element, atomic number
Number is at least one of 57~71 element.
The above-mentioned integral vehicular tai-gas clean-up catalyst with porous structure, described matrix are cordierite honeycomb ceramic base
Body or metallic matrix.
The preparation method of integral vehicular tai-gas clean-up catalyst of the present invention with porous structure, processing step is such as
Under：
(1) catalyst, bonding agent, acidity regulator, organic polymer and distilled water are uniformly mixed and coating slurry are made,
The quality of the bonding agent is the 1%~5% of catalyst quality, and the quality of the acidity regulator is the 2% of catalyst quality
~4%, the quality of the organic polymer is the 20%~80% of catalyst quality, and the dosage of the distilled water is with coating slurry
Solid content for 30%~60% metering, (solid content refers to the percentage of the quality of solids and coating slurry quality in coating slurry
Than)；
(2) gained coating slurry is coated uniformly on matrix, the coated weight of coating slurry should make catalyst on matrix
Upper carrying capacity be 120~180g/L；
(3) 2~8h will be roasted to get to the whole of porous structure at 450 DEG C~650 DEG C after the matrix drying after coating
Body formula tail gas cleaning catalyst for vehicles；
Described matrix is cordierite honeycomb ceramic matrix or metallic matrix, and the catalyst is using Pt or/and Pd as catalysis
Active component, with Al2O3Material or/and the three-way catalyst that hydrogen-storing material is carrier.
In the above method, the organic polymer is surfactant or synthetic resin.The surfactant is fat
Acid esters, carboxylic acid, polyethylene glycol, polyvinyl alcohol or long-chain amine ethoxylate；The synthetic resin is polyethylene oxide, polyurethane, gathers
Styrene, polyethylene, polyester or acrylate.
In the above method, the bonding agent is sucrose or algeldrate；The acidity regulator is citric acid or vinegar
Acid.
In the above method, the Al2O3Material is Al2O3Or through auxiliary agent B aO, SrO, La2O3、Y2O3In a kind of modification
Al2O3；The hydrogen-storing material is CeO2、CeO2-ZrO2、CeO2-ZrO2-Al2O3, doped chemical be modified CeO2, doped chemical changes
The CeO of property2-ZrO2, doped chemical be modified CeO2-ZrO2-Al2O3In one kind, doped chemical is Y element, atomic number is
At least one of 57~71 element.
In the method for the invention, the three-way catalyst of step (1) can be prepared by the following method：
(1) coprecipitation is taken to prepare catalyst carrier material, is weighed in right amount by the chemical formula and stoichiometric ratio of carrier
Presoma；
(2) each presoma is configured to certain density precursor solution with deionized water；
(3) ammonium carbonate is added in into mixing salt solution under agitation as precipitating reagent, control ph is 8.8~9.4,
Continue stirring and still aging, then filter and cleaned with deionized water to filtrate and be in neutrality collection sediment；
(4) roasting after drying precipitate is obtained into catalyst carrier material；
(5) a certain amount of active component of step (4) resulting vehicle material load is made after roasting using equi-volume impregnating
Into three-way catalyst.
Compared with prior art, the invention has the advantages that：
1st, the method for the invention in coating slurry due to adding organic polymer, the organic polymer in roasting process
Object escapes, and forms the integral catalyzer to micron level hole with nanometer, thus can improve dirt under the conditions of tail gas high-speed
Diffusion rate of the object in catalyst surface is contaminated, so as to improve catalytic activity so that the initiation temperature of CO, HC and NOx substantially drop
It is low.
2nd, after the integral vehicular tai-gas clean-up catalyst of the present invention with porous structure is when hydrothermal aging 20h is small
(10% water, 750 DEG C, 20h), there is apparent activity advantage compared to existing integral catalyzer, illustrate of the present invention porous
The integral catalyzer of structure durability and thermal stability compared with existing integral catalyzer significantly improve.
Description of the drawings
Fig. 1 is the front and rear signal of the integral vehicular tai-gas clean-up catalyst roasting of the present invention with porous structure
Scheme, in figure, 1- matrixes, 2- catalyst layers, 3- organic polymers, 4- holes.
Fig. 2 is the conversion ratio variation with temperature figure of CO in embodiment 2.
Fig. 3 is the conversion ratio variation with temperature figure of NO in embodiment 2.
Fig. 4 is the conversion ratio variation with temperature figure of HC in embodiment 2.
Fig. 5 is C in embodiment 23H6Conversion ratio variation with temperature figure.
Fig. 6 is the conversion ratio variation with temperature figure of CO in embodiment 3.
Fig. 7 is the conversion ratio variation with temperature figure of NO in embodiment 3.
Fig. 8 is the conversion ratio variation with temperature figure of HC in embodiment 3.
Fig. 9 is C in embodiment 33H6Conversion ratio variation with temperature figure.
Figure 10 adopts comparison diagram for the CO vehicle emission test seconds in embodiment 4.
Figure 11 adopts comparison diagram for the NOx vehicle emission test seconds in embodiment 4.
Figure 12 adopts comparison diagram for the THC vehicle emission test seconds in embodiment 4.
Specific embodiment
Embodiment 1
The preparation method of motorcycle tail gas cleaning integral catalyzer, processing step are as follows described in the present embodiment：
1st, the preparation of raw material three-way catalyst：
(1) CeO is prepared using coprecipitation2-ZrO2-La2O3-Nd2O3Composite oxide carrier：According to each presoma
CeO2、ZrO2、La2O3、Nd2O3Mass ratio 40:50:5:5 weigh corresponding presoma respectively；
(2) each presoma is dissolved in deionized water together, is uniformly mixed with blender stirring 30min, is configured to mix
Close solution；
(3) ammonium carbonate is added in into mixed solution under agitation as precipitating reagent, control ph 9 continues to stir
Still aging 2 days after 30min, then filter and cleaned with deionized water to filtrate and be in neutrality collection sediment；
(4) by sediment in drying box in 120 DEG C it is dry for 24 hours after, in 600 DEG C of logical oxygen roasting 3h in Muffle furnace, i.e.,
Obtain CeO2-ZrO2-La2O3-Nd2O3Carrier material；
(5) precious metals pt of carrier quality 1.0% is accounted for using equi-volume impregnating dipping, is placed in drying box in 110
DEG C dry 6h, then roasts 2h in 500 DEG C in Muffle furnace, obtains Pt/CeO2-ZrO2-La2O3-Nd2O3Three-way catalyst powder
Material；
2. the preparation of the integral vehicular tai-gas clean-up catalyst of porous structure：
(1) by gained Pt/CeO2-ZrO2-La2O3-Nd2O3Catalyst powder, the height of catalyst powder quality 3% glue (water
Close aluminium hydroxide), the acetic acid of catalyst powder quality 3% and 40% polyethylene oxide of catalyst powder quality mix with distilled water
Coating slurry is uniformly made, the dosage of distilled water is using the solid content of coating slurry as 45% metering；
(2) gained coating slurry is uniformly coated on cordierite honeycomb ceramic matrix (Corning companies of the U.S., 400
Mesh, 2.5cm3) on, the coated weight of coating slurry should make upper carrying capacity of the catalyst on matrix be 180g/L；
(3) the honeycomb-like cordierite ceramic honey comb after coating is progressively warming up to 120 DEG C by room temperature to be dried, Ran Hou
550 DEG C of roasting 3h are to get the integral vehicular tai-gas clean-up catalyst with porous structure.
Comparative example 1
In addition to organic polymer is not added in catalyst coating slurry, it is prepared using method same as Example 1
Comparative catalyst.
Embodiment 2
The integral catalyzer (being denoted as A) that 1 gained of embodiment has porous structure is subjected to catalytic activity investigation, with comparison
Comparative catalyst's (being denoted as B) prepared by example 1 is as a comparison.
Catalytic activity is tested：It is carried out in the microreactor continuously flowed in multichannel fixation, the motorcycle exhaust group of simulation
1 is shown in Table into experiment condition.Before test, integral catalyzer is first handled into 1h in motorcycle exhaust is simulated in 550 DEG C, so
Afterwards using the method for heating test, active testing is carried out after each temperature spot balance.To unconverted C3H8, C3H6, CO and NO
It is tested using fourier infrared gas analyzer (Thermol Fisher Scientific).In test process, λ controls
1.
Table 1.
Test result is as shown in Fig. 2~5：It was found from from Fig. 2~5, prepared by embodiment 1 is with the addition of organic polymer preparation
The integral catalyzer with porous structure with more preferable catalytic activity, CO, NO, HC and C3H6Initiation temperature reduce respectively
(i.e. △ T) 18 DEG C, 9 DEG C, 9 DEG C, 11 DEG C.
Embodiment 3
Investigate influence of the addition of organic polymer to integral catalyzer durability and thermal stability.
There is the integral catalyzer (being denoted as A) of porous structure and the comparison of the preparation of comparative example 1 to be catalyzed 1 gained of embodiment
Agent (being denoted as B) carries out catalytic activity test in the moving air of the water containing 10v% after 750 DEG C of hydrothermal aging 20h, and simulation rubs
Motorcycle tail gas composition is same as Example 2 with catalytic activity test method.
Test result is shown in Fig. 6-9, and it was found from Fig. 6-9, after aging, prepared by embodiment 1 is with the addition of organic polymer preparation
The integral catalyzer with porous structure with better catalytic activity, illustrate that being added with for organic polymer is beneficial to improve
The thermal stability and endurance quality of catalyst.Wherein CO, NO, HC and C3H6Initiation temperature reduce (△ T in figure respectively50)39
DEG C, 30 DEG C, 33 DEG C, 31 DEG C, complete conversion temperature reduces (△ T in figure respectively90)33℃、42℃、52℃、42℃。
Embodiment 4
Pt/CeO is prepared using composition same as Example 1 and method2-ZrO2-La2O3-Nd2O3Catalyst, as sample
Product carry out Finished Motorcycle of motorcycle emission test in from environmentally friendly Science and Technology Co., Ltd..Select pedal EFI state IV motorcycles
HJ100T-5A is test vehicle, installs test sample to fast-assembling silencer (specification), and press
WMTC-class1 test loops carry out catalytic activity test, and test equipment is Xin Weierte machines chassis dynamometer and HORIBA points
Analyzer.Test result is compared with state IV standards, the result is shown in Figure 1 0~12 and table 2.
Table 2.
It was found from Figure 10~12, the integral catalyzer with porous structure shown in vehicle emission test compared with
High activity and stability.It can be by CO, THC, NO during cold start-upxDischarge value reduce by more than 85%；As known from Table 2, CO,
THC (total amount containing hydrocarbon in gas), NOxDischarge value can meet state's IV discharge standards, wherein CO and THC's
Discharge at least reduces 50% compared to state IV.
Embodiment 5
(1) by Pt/CeO2-ZrO2-La2O3-Nd2O3Catalyst powder, the height of catalyst powder quality 3% glue (hydronium(ion)
Aluminium oxide), the acetic acid of catalyst powder quality 3% and 70% polyethylene oxide of catalyst powder quality be uniformly mixed with distilled water
Coating slurry is made, the dosage of distilled water is using the solid content of coating slurry as 30% metering；
(2) gained coating slurry is uniformly coated on cordierite honeycomb ceramic matrix (Corning companies of the U.S., 400
Mesh, 2.5cm3) on, the coated weight of coating slurry should make carrying capacity of the catalyst on matrix be 130g/L；
(3) cordierite honeycomb ceramic after coating is progressively warming up to 120 DEG C of dryings by room temperature, then in 550 DEG C of roastings
2h is to get the integral vehicular tai-gas clean-up catalyst with porous structure.
Embodiment 6
(1) by Pt/CeO2-ZrO2-La2O3-Nd2O3Catalyst powder, the height of catalyst powder quality 3% glue (hydronium(ion)
Aluminium oxide), the acetic acid of catalyst powder quality 3% and 30% polyethylene oxide of catalyst powder quality be uniformly mixed with distilled water
Coating slurry is made, the dosage of distilled water is using the solid content of coating slurry as 30% metering；
(2) gained coating slurry is uniformly coated on cordierite honeycomb ceramic matrix (Corning companies of the U.S., 400
Mesh, 2.5cm3) on, the coated weight of coating slurry should make carrying capacity of the catalyst on matrix be 150g/L；
(3) cordierite honeycomb ceramic after coating is progressively warming up to 120 DEG C by room temperature to be dried, then at 500 DEG C
2h is roasted to get the integral vehicular tai-gas clean-up catalyst with porous structure.
In above-described embodiment 5 and embodiment 6, Pt/CeO2-ZrO2-La2O3-Nd2O3The preparation method and reality of catalyst powder
It is identical to apply example 1.
Claims (10)
1. the integral vehicular tai-gas clean-up catalyst with porous structure, it is characterised in that by matrix and be covered on matrix simultaneously
It is formed with the catalyst layer that matrix is combined as a whole, the catalyst layer is with nanometer to the porous structure of micron order hole
Layer, the catalyst contained by catalyst layer is using Pt or/and Pd as catalytic active component, with Al2O3Material or/and hydrogen-storing material are
The three-way catalyst of carrier, upper carrying capacity of the catalyst on matrix are 120~180g/L.
2. there is the integral vehicular tai-gas clean-up catalyst of porous structure according to claim 1, it is characterised in that described
Al2O3Material is Al2O3Or through auxiliary agent B aO, SrO, La2O3、Y2O3In a kind of modification Al2O3。
3. the integral vehicular tai-gas clean-up catalyst according to claim 1 or claim 2 with porous structure, it is characterised in that institute
Hydrogen-storing material is stated as CeO2、CeO2-ZrO2、CeO2-ZrO2-Al2O3, doped chemical be modified CeO2, doped chemical be modified
CeO2-ZrO2, doped chemical be modified CeO2-ZrO2-Al2O3In one kind.
4. there is the integral vehicular tai-gas clean-up catalyst of porous structure according to claim 3, it is characterised in that described
Doped chemical is Y element, atomic number is at least one of 57~71 element.
5. the integral vehicular tai-gas clean-up catalyst according to claim 1 or claim 2 with porous structure, it is characterised in that institute
Matrix is stated as cordierite honeycomb ceramic matrix or metallic matrix.
6. the preparation method of the integral vehicular tai-gas clean-up catalyst with porous structure described in a kind of claim 1, special
Sign is that processing step is as follows：
(1) catalyst, bonding agent, acidity regulator, organic polymer and distilled water are uniformly mixed and coating slurry is made, it is described
The quality of bonding agent is the 1%~5% of catalyst quality, the quality of the acidity regulator for catalyst quality 2%~
4%, the quality of the organic polymer is the 20%~80% of catalyst quality, and the dosage of the distilled water is with coating slurry
Solid content is 30%~60% metering；
(2) gained coating slurry is coated uniformly on matrix, the coated weight of coating slurry should make catalyst upper on matrix
Carrying capacity is 120~180g/L；
(3) 2~8h will be roasted to get to the monoblock type with porous structure at 450 DEG C~650 DEG C after the matrix drying after coating
Tail gas cleaning catalyst for vehicles；
Described matrix is cordierite honeycomb ceramic matrix or metallic matrix, and the catalyst is using Pt or/and Pd as catalytic activity
Component, with Al2O3Material or/and the three-way catalyst that hydrogen-storing material is carrier.
7. the preparation method of the integral vehicular tai-gas clean-up catalyst with porous structure according to claim 6, special
Sign is that the organic polymer is surfactant or synthetic resin.
8. the preparation method of the integral vehicular tai-gas clean-up catalyst with porous structure according to claim 7, special
Sign is that the surfactant is aliphatic ester, carboxylic acid, polyethylene glycol, polyvinyl alcohol or long-chain amine ethoxylate；The synthesis
Resin is polyethylene oxide, polyurethane, polystyrene, polyethylene, polyester or acrylate.
9. there is the integral vehicular exhaust purification catalytic of porous structure according to any claim in claim 6~8
The preparation method of agent, it is characterised in that the bonding agent is sucrose or algeldrate；Acidity regulator is citric acid or vinegar
Acid.
10. there is the integral vehicular exhaust purification catalytic of porous structure according to any claim in claim 6~8
The preparation method of agent, it is characterised in that the Al2O3Material is Al2O3Or through auxiliary agent B aO, SrO, La2O3、Y2O3In one kind change
The Al of property2O3；The hydrogen-storing material is CeO2、CeO2-ZrO2、CeO2-ZrO2-Al2O3, doped chemical be modified CeO2, doping member
The modified CeO of element2-ZrO2, doped chemical be modified CeO2-ZrO2-Al2O3In one kind, doped chemical for Y element, atomic number
Number is at least one of 57~71 element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711139840.6A CN108043397B (en) | 2017-11-16 | 2017-11-16 | Integral vehicle tail gas purification catalyst with porous structure and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711139840.6A CN108043397B (en) | 2017-11-16 | 2017-11-16 | Integral vehicle tail gas purification catalyst with porous structure and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108043397A true CN108043397A (en) | 2018-05-18 |
| CN108043397B CN108043397B (en) | 2020-10-13 |
Family
ID=62119823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711139840.6A Active CN108043397B (en) | 2017-11-16 | 2017-11-16 | Integral vehicle tail gas purification catalyst with porous structure and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108043397B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61245850A (en) * | 1985-04-24 | 1986-11-01 | Mazda Motor Corp | Preparation of catalyst structure |
| EP0736503A1 (en) * | 1995-04-05 | 1996-10-09 | Nippondenso Co., Ltd. | Exhaust gas purifying filter and processes for its production |
| EP1364706A1 (en) * | 2001-03-02 | 2003-11-26 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Exhaust gas purifying catalyst |
| JP2004025013A (en) * | 2002-06-25 | 2004-01-29 | Toyota Central Res & Dev Lab Inc | Catalyst for exhaust gas purification and its manufacturing method |
| CN101204673A (en) * | 2006-12-15 | 2008-06-25 | 日产自动车株式会社 | Exhaust gas purging catalyst and method for producing the exhaust gas purging catalyst |
| US20110005211A1 (en) * | 2007-10-09 | 2011-01-13 | Sud-Chemie Ag | Coating of substrates ensuring a high porosity with simutaneously high abrasion resistance of the coating |
| CN103203228A (en) * | 2013-03-04 | 2013-07-17 | 东风汽车有限公司 | Slurry for diesel vehicle tail gas catalyst coating and using method thereof |
| CN103657638A (en) * | 2013-12-31 | 2014-03-26 | 重庆远达催化剂制造有限公司 | Integral dioxin removing catalyst and preparation method thereof |
| CN105597750A (en) * | 2016-01-06 | 2016-05-25 | 中自环保科技股份有限公司 | Crack-free three-way catalyst coating slurry, catalyst and preparing method of catalyst |
| CN106732585A (en) * | 2017-03-06 | 2017-05-31 | 西南化工研究设计院有限公司 | A kind of VOCs catalytic burning integral types catalyst and preparation method thereof |
-
2017
- 2017-11-16 CN CN201711139840.6A patent/CN108043397B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61245850A (en) * | 1985-04-24 | 1986-11-01 | Mazda Motor Corp | Preparation of catalyst structure |
| EP0736503A1 (en) * | 1995-04-05 | 1996-10-09 | Nippondenso Co., Ltd. | Exhaust gas purifying filter and processes for its production |
| EP1364706A1 (en) * | 2001-03-02 | 2003-11-26 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Exhaust gas purifying catalyst |
| JP2004025013A (en) * | 2002-06-25 | 2004-01-29 | Toyota Central Res & Dev Lab Inc | Catalyst for exhaust gas purification and its manufacturing method |
| CN101204673A (en) * | 2006-12-15 | 2008-06-25 | 日产自动车株式会社 | Exhaust gas purging catalyst and method for producing the exhaust gas purging catalyst |
| US20110005211A1 (en) * | 2007-10-09 | 2011-01-13 | Sud-Chemie Ag | Coating of substrates ensuring a high porosity with simutaneously high abrasion resistance of the coating |
| CN103203228A (en) * | 2013-03-04 | 2013-07-17 | 东风汽车有限公司 | Slurry for diesel vehicle tail gas catalyst coating and using method thereof |
| CN103657638A (en) * | 2013-12-31 | 2014-03-26 | 重庆远达催化剂制造有限公司 | Integral dioxin removing catalyst and preparation method thereof |
| CN105597750A (en) * | 2016-01-06 | 2016-05-25 | 中自环保科技股份有限公司 | Crack-free three-way catalyst coating slurry, catalyst and preparing method of catalyst |
| CN106732585A (en) * | 2017-03-06 | 2017-05-31 | 西南化工研究设计院有限公司 | A kind of VOCs catalytic burning integral types catalyst and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| SU NING WANG ET AL.: ""Designed synthesis of Zr-based ceria-zirconia-neodymia composite with highly thermal stability and its enhanced catalytic performance for Rh-only three-way catalyst"", 《CATALYSIS SCIENCE & TECHNOLOGY》 * |
| 闫朝阳等: ""高性能 Ce0.5Zr0.5O2稀土储氧材料的制备及其负载的单 Pd 三效催化剂"", 《催化学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108043397B (en) | 2020-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102631917B (en) | Oxidation catalyst for purifying exhaust of diesel vehicle and preparation method for oxidation catalyst | |
| CN101433846B (en) | Cerium-based composite oxides supported precious metal three-effect catalyst and preparation method thereof | |
| CN1140337C (en) | Catalyst composition contg. intimately mixed oxide of cerium and praseodymium | |
| CN1152743C (en) | Exhaust gas catalyst comprising rhodium, zirconia and rare earth oxide | |
| CN100393414C (en) | Catalyst for lowering combustion temperature of soot in diesel exhaust gas and preparation method thereof | |
| CN100455352C (en) | Honeycomb metal wire net carrier catalyst for catalytically reducing nitrogen oxide and preparing method thereof | |
| CN113304745B (en) | Pt-Pd-Rh ternary catalyst and preparation method thereof | |
| WO2014134855A1 (en) | Low-temperature scr catalyst for denitrating diesel vehicle exhaust, and preparation method thereof | |
| CN103433057A (en) | Three-way catalyst used for automobile emission purification and preparation method thereof | |
| CN103464152A (en) | Catalyst for tail gas purification and preparation method thereof | |
| CN105618043B (en) | Catalyst, preparation method and application | |
| CN104128193B (en) | A kind of CeO 2base SCR catalyst and preparation method thereof | |
| CN102861605B (en) | Diesel vehicle oxidation catalyst with low SO2 oxidation activity and preparation method of catalyst | |
| CN109590014A (en) | A kind of integral diesel tail gas oxidation catalyst and preparation method thereof | |
| CN111068710A (en) | Catalyst for burning carbon smoke and preparation method and application thereof | |
| CN102728383A (en) | Preparation method of high temperature stable monolithic catalyst for purifying tail gas of automobile | |
| CN104607187B (en) | The three-dimensional ordered macroporous mesoporous three-way catalyst and preparation method and application of a kind of heat-staple precious metal doping type | |
| CN111330633B (en) | Diesel vehicle oxidation catalyst with low-temperature adsorption capacity and preparation method thereof | |
| CN101259438A (en) | Glass coating for selective catalytic converter and preparation | |
| CN102974343A (en) | Catalyst suitable for processing tail gas of lean-burn natural gas vehicle and preparation method thereof | |
| CN103285854B (en) | Fractions of Diesel Engine Exhaust Particulates object catalyst, and preparation method thereof and application method | |
| CN104289253B (en) | It is a kind of for catalyst of car combustion engine tail gas clean-up and preparation method thereof | |
| CN103191736B (en) | The preparation method of cyclic three-way catalyst | |
| JPH07155614A (en) | Production of exhaust gas purifying catalyst | |
| CN101700497A (en) | Ternary catalyst for metal honeycomb carrier of motorcycle and method for preparing same |
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 |