CN114849697A - Catalyst based on three-way catalyst ceramic carrier and preparation method thereof - Google Patents
Catalyst based on three-way catalyst ceramic carrier and preparation method thereof Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 100
- 239000000919 ceramic Substances 0.000 title claims abstract description 98
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 114
- 238000000576 coating method Methods 0.000 claims abstract description 114
- 239000000463 material Substances 0.000 claims abstract description 109
- 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 56
- 239000000843 powder Substances 0.000 claims abstract description 55
- 239000003292 glue Substances 0.000 claims abstract description 50
- 238000001354 calcination Methods 0.000 claims abstract description 48
- 238000002791 soaking Methods 0.000 claims abstract description 47
- 239000007864 aqueous solution Substances 0.000 claims abstract description 43
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims abstract description 40
- 239000006255 coating slurry Substances 0.000 claims abstract description 38
- 238000003756 stirring Methods 0.000 claims abstract description 32
- 238000001035 drying Methods 0.000 claims abstract description 28
- 229910000420 cerium oxide Inorganic materials 0.000 claims abstract description 20
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims abstract description 20
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 20
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 19
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 34
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 29
- 238000000227 grinding Methods 0.000 claims description 21
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 claims description 16
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 16
- 239000011259 mixed solution Substances 0.000 claims description 16
- BEDFIBPNPHRGDO-UHFFFAOYSA-N yttrium;hydrate Chemical compound O.[Y] BEDFIBPNPHRGDO-UHFFFAOYSA-N 0.000 claims description 16
- 239000011148 porous material Substances 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 14
- 229910017604 nitric acid Inorganic materials 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 239000008367 deionised water Substances 0.000 description 12
- 229910021641 deionized water Inorganic materials 0.000 description 12
- 239000000126 substance Substances 0.000 description 12
- 238000005406 washing Methods 0.000 description 12
- 230000008595 infiltration Effects 0.000 description 8
- 238000001764 infiltration Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000000746 purification Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- -1 aluminum ions Chemical class 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
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- 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
- B01J37/0232—Coating by pulverisation
-
- 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
- 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
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
-
- B01J35/56—
-
- 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
- B01J37/0201—Impregnation
- B01J37/0205—Impregnation in several steps
-
- 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
-
- 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
- B01J37/0217—Pretreatment of the substrate before coating
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- 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
Abstract
The application relates to the technical field of catalysts, in particular to a three-way catalyst ceramic carrier-based catalyst and a preparation method thereof. The preparation method of the catalyst based on the three-way catalyst ceramic carrier comprises the following steps: adding the coating material into an aqueous solution of alumina dry glue powder, and stirring for 20-40min to obtain coating slurry; wherein the coating material comprises the following components in parts by mass: 1-5 parts of aluminum oxide, 10-15 parts of manganese oxide, 8-15 parts of cerium oxide and 1-10 parts of yttrium oxide; and soaking the honeycomb ceramic carrier in the coating slurry for 1-3min, repeatedly soaking for 2-3 times, taking out, drying at 110 ℃ for 3-5h, and calcining at 500 ℃ for 4-5h to obtain the catalyst. The application provides a catalyst has excellent purifying effect, and catalytic effect is stable, availability is high.
Description
Technical Field
The application relates to the technical field of catalysts, in particular to a three-way catalyst ceramic carrier-based catalyst and a preparation method thereof.
Background
Automobile exhaust emissions have become a major source of atmospheric pollution, and automobile exhaust contains carbon monoxide, nitrogen oxide and other solid particles which have adverse effects on human bodies. At present, the automobile exhaust purification catalyst is the most effective means for controlling automobile exhaust emission and reducing automobile pollution, the commonly used catalyst comprises a noble metal catalyst and a rare earth automobile exhaust purification catalyst, the noble metal catalyst mainly selects platinum, palladium and the like as the catalyst, and the catalyst has the advantages of high activity, long service life, good purification effect, strong practicability and the like, but is difficult to widely popularize; the rare earth automobile tail gas purifying catalyst is prepared with rare earth, alkali earth metal and some alkali metal, and may be also prepared with rare earth and small amount of noble metal.
With the improvement of the requirement on the catalytic performance of the catalyst, research and development personnel load catalytic active ingredients on the honeycomb ceramic carrier and widely apply the catalytic active ingredients to the filtration and treatment of automobile exhaust. The existing honeycomb monolithic catalyst obtained by a loading mode has poor adhesion and durability of catalytic active components on a honeycomb ceramic carrier, thereby influencing the catalytic effect. In view of this, it is necessary to provide a catalyst having a good adhesion of the catalytically active component and an excellent catalytic effect.
Disclosure of Invention
The embodiment of the application provides a catalyst based on a three-way catalyst ceramic carrier and a preparation method thereof, and the catalytic active component of the catalyst has excellent adhesive force and durability on the ceramic carrier, so that the stability of a catalytic effect is ensured, and the effective utilization rate of the catalyst is improved.
In a first aspect, the application provides a preparation method of a three-way catalyst based on a ceramic carrier, which comprises the following steps:
adding the coating material into an aqueous solution of alumina dry glue powder, and stirring for 20-40min to obtain coating slurry;
and soaking the honeycomb ceramic carrier in the coating slurry for 1-3min, repeatedly soaking for 2-3 times, taking out, drying at 110 ℃ for 3-5h, and calcining at 500 ℃ for 4-5h to obtain the catalyst.
In some embodiments, the coating material comprises, in parts by mass: 1-5 parts of aluminum oxide, 10-15 parts of manganese oxide, 8-15 parts of cerium oxide and 1-10 parts of yttrium oxide. In some preferred embodiments, the coating material comprises, in parts by mass: 3 parts of aluminum oxide, 11 parts of manganese oxide, 9 parts of cerium oxide and 2 parts of yttrium oxide.
In some embodiments, the coating material is prepared by the following process: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70-80 ℃, stirring, treating at 110 ℃ for 5-8h, fully grinding, and calcining at 550 ℃ for 3-4h to obtain the coating material. The citric acid is added and the solution is treated at 110 ℃ for 5-8h, so that the grinding time can be shortened, and the catalytic effect can be improved, because the citric acid can be chelated with aluminum ions, manganese ions, cerium ions and yttrium ions in a bidentate or bridge structure and other coordination manner, the concentrated growth degree of crystals among zinc blende type crystals, octahedral structures, body-centered cubic structures and other crystals in the chelating system is reduced, the crystals are uniformly distributed, the grinding dispersibility is good in the grinding process, the later-stage coating uniformity is facilitated, and the blockage of carrier pores is avoided.
In some embodiments, the weight ratio of citric acid, water, and aluminum nitrate is (1-3): (3-4): 1. in some preferred embodiments, the weight ratio of citric acid, water, and aluminum nitrate is 2.2:3.5: 1.
In some embodiments, the honeycomb ceramic support has a density of 2.1 to 2.2g/cm 3 . In some preferred embodiments, the honeycomb ceramic support has a density of 2.16g/cm 3 。
In some embodiments, the weight ratio of the coating material to the aqueous solution of dry alumina gel powder is 1: (2.5-3.2). In some preferred embodiments, the weight ratio of the coating material to the aqueous solution of the dry alumina gel powder is 1: 3.
In some embodiments, the alumina dry gel powder has a pore volume of not less than 1 mL/g. In some preferred embodiments, the pore volume of the alumina dry gel powder is not less than 1.021 mL/g. When the alumina dry glue powder with the pore volume not less than 1mL/g is used and the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1 (2.5-3.2), the infiltration time and the infiltration times can be reduced, the single-time coating amount can be increased, and the generation of cracks in the calcining process can be avoided, because when the pore volume of the alumina dry glue powder is in a specific range and is mixed with a specific coating material, after coating, the adhesion with a honeycomb ceramic carrier is increased, pore channel blockage is avoided during infiltration, and simultaneously, the influence of large shrinkage caused by too high solid content in later-stage calcination is effectively avoided by each bridged molecule. The coating material is prepared through a process of treatment at 105-110 ℃ for 5-8h, and then alumina dry glue powder with the pore volume of more than or equal to 1ml/g is used in the using method, so that the coating rate can be effectively improved, the obtained coating material with uniform crystal structure has good dispersibility in an alumina dry powder aqueous solution in the pore volume range, the molecular distance is reduced, the coating property on the surface of the carrier is good, and meanwhile, the surface has a larger specific surface area in the repeated infiltration process, so that the adhesive force for coating again can be increased.
In some embodiments, the aqueous solution of alumina dry glue powder has a mass fraction of 15 wt% to 20 wt%. In some preferred embodiments, the mass fraction of the aqueous solution of alumina dry glue powder is 18 wt%.
In some embodiments, the honeycomb ceramic support is treated with a 10 wt% acid solution prior to being wetted in the coating slurry.
In some embodiments, the acid solution is nitric acid.
In some embodiments, the honeycomb ceramic carrier is put into the coating slurry to be soaked for 1-3min, then taken out and kept stand for 5-8min, and then the soaking is repeated for 2-3 times, and the honeycomb ceramic carrier is taken out and kept stand for 5-8min during the repeated soaking. Compared with the continuous infiltration mode, the mode of firstly infiltrating, then standing and then repeatedly infiltrating is adopted, and meanwhile, the density interval is 2.1-2.2g/cm 3 The honeycomb ceramic carrier can ensure that the coating thickness of the coating material on the carrier is uniform, and in the standing process, molecules in the alumina dry glue powder aqueous solution containing alumina, manganese oxide, cerium oxide and yttrium oxide are in close contact with interface molecules with specific density, and meanwhile, molecules in the alumina dry glue powder aqueous solution are in close contact with the interface molecules with specific densityAfter a certain time, the molecular state of each surface is more easily uniform, and the difference of the acting force with the alumina dry glue powder aqueous solution is reduced in the next infiltration process.
In a second aspect, the present application provides a three-way catalyst based on a ceramic carrier for a catalyst prepared by the above preparation method, the catalyst comprising a honeycomb ceramic carrier and a coating material coated on the honeycomb ceramic carrier, wherein the coating material comprises, by mass: 1-5 parts of aluminum oxide, 10-15 parts of manganese oxide, 8-15 parts of cerium oxide and 1-10 parts of yttrium oxide.
In some embodiments, the coating material comprises, in parts by mass: 3 parts of aluminum oxide, 11 parts of manganese oxide, 9 parts of cerium oxide and 2 parts of yttrium oxide.
In some embodiments, the coating material is prepared by the following process: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70-80 ℃, stirring, treating at 110 ℃ for 5-8h, fully grinding, and calcining at 550 ℃ for 3-4h to obtain the coating material.
In some embodiments, the weight ratio of citric acid, water, and aluminum nitrate is (1-3): (3-4): 1. in some preferred embodiments, the weight ratio of citric acid, water, and aluminum nitrate is 2.2:3.5: 1.
In some embodiments, the honeycomb ceramic support has a density of 2.1 to 2.2g/cm 3 . In some preferred embodiments, the honeycomb ceramic support has a density of 2.16g/cm 3 。
The beneficial effect that technical scheme that this application provided brought includes:
(1) by utilizing the method provided by the application, the coating material can be uniformly coated on the ceramic carrier, the coating material has excellent adhesive force and durability, and the coating material does not crack or fall off in a long-time high-temperature environment, so that the stability of a catalytic effect is ensured, and the effective utilization rate of a catalyst is improved;
(2) when the coating material is prepared, the mode of treatment at the temperature of 105-;
(3) the density used in the application is 2.1-2.2g/cm 3 The honeycomb ceramic carrier is simultaneously subjected to standing for 5-8min and repeated infiltration in the process of infiltrating the coating slurry by the carrier, so that the coating material can be uniformly distributed on the surface of the carrier;
(4) the alumina dry glue powder with the pore volume more than or equal to 1mL/g and the weight ratio of the specific coating material to the aqueous solution of the alumina dry glue powder is adopted, so that the problem of large shrinkage of the coating material caused by later-stage calcination can be effectively avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a preparation method of a three-way catalyst ceramic carrier-based catalyst provided in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a catalyst based on a three-way catalyst ceramic carrier and a preparation method thereof, and the catalyst has the advantages of excellent purification effect, stable catalysis effect and high effective utilization rate.
Fig. 1 is a schematic flow chart of a preparation method of a three-way catalyst based on a ceramic carrier, and referring to fig. 1, the preparation method of the catalyst provided by the application comprises the following steps:
step S101, adding the coating material into an aqueous solution of alumina dry glue powder, and stirring for 20-40min to obtain coating slurry; wherein, by mass, the coating material comprises: 1-5 parts of aluminum oxide, 10-15 parts of manganese oxide, 8-15 parts of cerium oxide and 1-10 parts of yttrium oxide; the pore volume of the alumina dry glue powder is not less than 1mL/g, and the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: (2.5-3.2), the mass fraction of the aqueous solution of the alumina dry glue powder is 15-20 wt%;
step S102, using 10 wt% nitric acid to make the density of the mixture 2.1-2.2g/cm 3 Treating the honeycomb ceramic carrier, then putting the treated honeycomb ceramic carrier into the coating slurry for soaking for 1-3min, taking out and standing for 5-8min, repeatedly soaking for 2-3 times, taking out and standing for 5-8min during each soaking period, taking out and drying at 110 ℃ for 3-5h after soaking, and then calcining at 500 ℃ for 4-5h at 450 ℃ to obtain the catalyst.
In step S101, the preparation process of the coating material is: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70-80 ℃, stirring, treating at 110 ℃ for 5-8h, fully grinding, and calcining at 550 ℃ for 3-4h to obtain a coating material; the weight ratio of the citric acid to the water to the aluminum nitrate is (1-3): (3-4): 1.
when the coating material is prepared, the mode of treatment at the temperature of 105-; the density used in the application is 2.1-2.2g/cm 3 The honeycomb ceramic carrier is simultaneously subjected to standing for 5-8min and repeated infiltration in the process of infiltrating the coating slurry by the carrier, so that the coating material can be uniformly distributed on the surface of the carrier; the alumina dry glue powder with the pore volume more than or equal to 1mL/g and the weight ratio of the specific coating material to the aqueous solution of the alumina dry glue powder is adopted, so that the problem of large shrinkage of the coating material caused by later-stage calcination can be effectively avoided.
The three-way catalyst based on ceramic carrier and the preparation method thereof provided by the present application will be described in detail with reference to examples and comparative examples.
Description of raw material sources:
a honeycomb ceramic carrier: purchased from Kexing Special ceramics of Jiangxi province, and having a density of 2.16g/cm 3 The external dimension is 150 × 300mm, the number of holes is 40 × 40, the hole width is 3.0mm/0.119in, the wall thickness is 0.7mm/0.028in, and the opening rate is 64%;
alumina dry glue powder: purchased from Shangtai science and technology development Co., Ltd in Liaoning, the pore volume is more than or equal to 1.021ml/g, and the model is SHSI-MP.
Example 1:
embodiment 1 of the present application provides a preparation method of a three-way catalyst ceramic carrier-based catalyst, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70 ℃, stirring, treating at 105 ℃ for 8 hours, fully grinding, and calcining at 450 ℃ for 4 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 1 part of aluminum oxide, 10 parts of manganese oxide, 8 parts of cerium oxide and 1 part of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 1: 3: 1;
adding the coating material into a 15 wt% aqueous solution of alumina dry glue powder, and stirring for 20min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 2.5;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying at 100 ℃ for 2 hours, calcining at 500 ℃ for 2 hours, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 1min, taking out, repeatedly soaking for 2 times, standing for 5min before repeatedly soaking each time, drying at 100 ℃ for 5 hours, and calcining at 450 ℃ for 5 hours to obtain the catalyst.
Example 2:
embodiment 2 of the present application provides a preparation method of a three-way catalyst ceramic carrier-based catalyst, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 80 ℃, stirring, treating at 110 ℃ for 5 hours, fully grinding, and calcining at 550 ℃ for 3 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 5 parts of aluminum oxide, 15 parts of manganese oxide, 15 parts of cerium oxide and 10 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 3: 4: 1;
adding the coating material into 20 wt% of aqueous solution of alumina dry glue powder, and stirring for 40min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 3.2;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying at 100 ℃ for 2 hours, calcining at 500 ℃ for 2 hours, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 3min, taking out, repeatedly soaking for 3 times, standing for 8min before repeatedly soaking each time, drying at 110 ℃ for 3 hours, and calcining at 500 ℃ for 4 hours to obtain the catalyst.
Example 3:
embodiment 3 of the present application provides a preparation method of a three-way catalyst ceramic carrier-based catalyst, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 75 ℃, stirring, treating at 108 ℃ for 6 hours, fully grinding, and calcining at 500 ℃ for 3.5 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 3 parts of aluminum oxide, 11 parts of manganese oxide, 9 parts of cerium oxide and 2 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 2.2:3.5: 1;
adding the coating material into an aqueous solution of 18 wt% of alumina dry glue powder, and stirring for 30min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 3;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying for 2 hours at 100 ℃, calcining for 2 hours at 500 ℃, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 2min, taking out, repeatedly soaking for 2 times, standing for 5min before repeatedly soaking each time, drying for 4 hours at 105 ℃, and calcining for 4.5 hours at 480 ℃, thereby obtaining the catalyst.
Example 4:
embodiment 4 of the present application provides a preparation method of a three-way catalyst ceramic carrier-based catalyst, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 75 ℃, stirring, treating at 100 ℃ for 4 hours, fully grinding, and calcining at 500 ℃ for 3.5 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 3 parts of aluminum oxide, 11 parts of manganese oxide, 9 parts of cerium oxide and 2 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 2.2:3.5: 1;
adding the coating material into an aqueous solution of 18 wt% of alumina dry glue powder, and stirring for 30min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 3;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying for 2 hours at 100 ℃, calcining for 2 hours at 500 ℃, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 2min, taking out, repeatedly soaking for 2 times, standing for 5min before repeatedly soaking each time, drying for 4 hours at 105 ℃, and calcining for 4.5 hours at 480 ℃, thereby obtaining the catalyst.
In the preparation of the coating materials of examples 1 to 4, the abrasiveness was recorded during grinding and the grinding times were ranked, see table 1, where the abrasiveness was ranked in order of magnitude by arabic number in table 1.
Table 1: abrasiveness of coating materials of examples 1-4
| Examples | Abrasiveness property |
| Example 1 | 3 |
| Example 2 | 2 |
| Example 3 | 1 |
| Example 4 | 4 |
Comparative example 1:
the alumina dry glue powder used in comparative example 1 was purchased from Liaoning Haitai science and technology development Co., Ltd, and had a pore volume of 0.89ml/g or more, and the alumina dry glue powder had a pore volume of 0.89 to 1.2 ml/g.
Comparative example 1 of the present application provides a method for preparing a three-way catalyst based on a ceramic carrier, comprising the steps of:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 75 ℃, stirring, treating at 108 ℃ for 6 hours, fully grinding, and calcining at 500 ℃ for 3.5 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 3 parts of aluminum oxide, 11 parts of manganese oxide, 9 parts of cerium oxide and 2 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 2.2:3.5: 1;
adding the coating material into an aqueous solution of 18 wt% of alumina dry glue powder, and stirring for 30min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 3;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying for 2 hours at 100 ℃, calcining for 2 hours at 500 ℃, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 2min, then taking out, repeatedly soaking for 2 times, drying for 4 hours at 105 ℃, and calcining for 4.5 hours at 480 ℃, thus obtaining the catalyst.
Observing the catalysts finally obtained in examples 1-4 and comparative example 1, and observing whether the coating materials on the surfaces of the carriers have cracks or fall off, if the coating materials have no cracks or fall off, recording that the coating materials pass, otherwise, recording that the coating materials do not pass; the catalysts were then placed in an environment of 300 ℃ for one month, and the coating materials on the surfaces of the supports finally obtained in examples 1 to 3 were observed for the occurrence of cracks and peeling, and if not, the results are shown in Table 2.
Table 2: adhesion of catalysts of examples 1-4, comparative example 1
Example 5:
embodiment 5 of the present application provides a method for preparing a catalyst based on a three-way catalyst ceramic carrier, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 72 ℃, stirring, treating at 108 ℃ for 8 hours, fully grinding, and calcining at 500 ℃ for 4 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 2 parts of aluminum oxide, 11.5 parts of manganese oxide, 12 parts of cerium oxide and 3.5 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 1.5: 3.5: 1;
adding the coating material into an aqueous solution of 18 wt% of alumina dry glue powder, and stirring for 20min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 2.8 of;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying at 100 ℃ for 2 hours, calcining at 500 ℃ for 2 hours, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 2min, taking out, repeatedly soaking for 2 times, standing for 6min before repeatedly soaking each time, drying at 100 ℃ for 4 hours, and calcining at 450 ℃ for 5 hours to obtain the catalyst.
Example 6:
embodiment 6 of the present application provides a method for preparing a catalyst based on a three-way catalyst ceramic carrier, comprising the steps of:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 75 ℃, stirring, treating at 105 ℃ for 8 hours, fully grinding, and calcining at 480 ℃ for 4 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 3.5 parts of aluminum oxide, 13 parts of manganese oxide, 12 parts of cerium oxide and 5 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 2: 3: 1;
adding the coating material into a 16 wt% aqueous solution of alumina dry glue powder, and stirring for 20min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 2.5;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying for 2 hours at 100 ℃, calcining for 2 hours at 500 ℃, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 3min, then taking out, repeatedly soaking for 2 times, standing for 6min before repeated soaking each time, drying for 5 hours at 105 ℃, and calcining for 5 hours at 460 ℃, thus obtaining the catalyst.
Example 7:
embodiment 7 of the present application provides a preparation method of a three-way catalyst ceramic carrier-based catalyst, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70 ℃, stirring, treating at 105 ℃ for 8 hours, fully grinding, and calcining at 450 ℃ for 4 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 1.5 parts of aluminum oxide, 14.5 parts of manganese oxide, 8.5 parts of cerium oxide and 5.5 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 1: 3: 1;
adding the coating material into a 16 wt% aqueous solution of alumina dry glue powder, and stirring for 20min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 2.8 of;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying at 100 ℃ for 2 hours, calcining at 500 ℃ for 2 hours, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 2min, taking out, repeatedly soaking for 2 times, standing for 6min before repeated soaking each time, drying at 100 ℃ for 5 hours, and calcining at 450 ℃ for 5 hours to obtain the catalyst.
Example 8:
embodiment 8 of the present application provides a preparation method of a three-way catalyst ceramic carrier-based catalyst, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70 ℃, stirring, treating at 108 ℃ for 8 hours, fully grinding, and calcining at 450 ℃ for 4 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 4.5 parts of aluminum oxide, 12 parts of manganese oxide, 11 parts of cerium oxide and 6 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 1.5: 3: 1;
adding the coating material into a 15 wt% aqueous solution of alumina dry glue powder, and stirring for 20min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 2.5;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying at 100 ℃ for 2 hours, calcining at 500 ℃ for 2 hours, soaking the treated honeycomb ceramic carrier into coating slurry (as long as the honeycomb ceramic carrier is immersed) for 2min, taking out, repeatedly soaking for 2 times, standing for 7min before repeated soaking every time, drying at 100 ℃ for 5 hours, and calcining at 450 ℃ for 5 hours to obtain the catalyst.
Example 9:
embodiment 9 of the present application provides a preparation method of a three-way catalyst ceramic carrier-based catalyst, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 75 ℃, stirring, treating at 105 ℃ for 7 hours, fully grinding, and calcining at 460 ℃ for 4 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 3.5 parts of aluminum oxide, 11.5 parts of manganese oxide, 9.5 parts of cerium oxide and 1.5 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 2: 3: 1;
adding the coating material into a 15 wt% aqueous solution of alumina dry glue powder, and stirring for 20min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 2.5;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying at 100 ℃ for 2 hours, calcining at 500 ℃ for 2 hours, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 1min, taking out, repeatedly soaking for 2 times, standing for 5min before repeatedly soaking each time, drying at 100 ℃ for 5 hours, and calcining at 450 ℃ for 5 hours to obtain the catalyst.
Example 10:
embodiment 10 of the present application provides a preparation method of a three-way catalyst ceramic carrier-based catalyst, comprising the following steps:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70 ℃, stirring, treating at 105 ℃ for 8 hours, fully grinding, and calcining at 450 ℃ for 4 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 1 part of aluminum oxide, 10 parts of manganese oxide, 8.5 parts of cerium oxide and 3.5 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 1: 3: 1;
adding the coating material into an aqueous solution of 18 wt% of alumina dry glue powder, and stirring for 20min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 2.5;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying at 100 ℃ for 2 hours, calcining at 500 ℃ for 2 hours, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 1min, taking out, repeatedly soaking for 2 times, standing for 6min before repeated soaking each time, drying at 100 ℃ for 5 hours, and calcining at 450 ℃ for 5 hours to obtain the catalyst.
Example 11:
embodiment 11 of the present application provides a method for preparing a catalyst based on a three-way catalyst ceramic carrier, comprising the steps of:
preparing a coating material: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70 ℃, stirring, treating at 105 ℃ for 8 hours, fully grinding, and calcining at 450 ℃ for 4 hours to obtain a coating material; the coating material comprises the following substances in parts by mass: 3 parts of aluminum oxide, 11.5 parts of manganese oxide, 9 parts of cerium oxide and 8 parts of yttrium oxide; the weight ratio of the citric acid to the water to the aluminum nitrate is 1: 3: 1;
adding the coating material into a 16 wt% aqueous solution of alumina dry glue powder, and stirring for 20min to obtain coating slurry; the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: 2.5;
treating the honeycomb ceramic carrier by using 10 wt% of nitric acid for 8 hours, washing by using deionized water, drying at 100 ℃ for 2 hours, calcining at 500 ℃ for 2 hours, soaking the treated honeycomb ceramic carrier into the coating slurry (as long as the honeycomb ceramic carrier is immersed) for 2min, taking out, repeatedly soaking for 2 times, standing for 5min before repeatedly soaking each time, drying at 100 ℃ for 5 hours, and calcining at 450 ℃ for 5 hours to obtain the catalyst.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In this application, "plurality" means at least two, e.g., two, three, etc., unless specifically stated otherwise.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A preparation method of a catalyst based on a three-way catalyst ceramic carrier is characterized by comprising the following steps:
adding the coating material into an aqueous solution of alumina dry glue powder, and stirring for 20-40min to obtain coating slurry; wherein the coating material comprises the following components in parts by mass: 1-5 parts of aluminum oxide, 10-15 parts of manganese oxide, 8-15 parts of cerium oxide and 1-10 parts of yttrium oxide;
and soaking the honeycomb ceramic carrier in the coating slurry for 1-3min, repeatedly soaking for 2-3 times, taking out, drying at 110 ℃ for 3-5h, and calcining at 500 ℃ for 4-5h to obtain the catalyst.
2. The method for preparing a three-way catalyst based on a ceramic carrier according to claim 1, wherein the coating material is prepared by the following steps: adding citric acid into a mixed solution of aluminum nitrate, manganese nitrate, cerium nitrate, yttrium nitrate and water at 70-80 ℃, stirring, treating at 110 ℃ for 5-8h, fully grinding, and calcining at 550 ℃ for 3-4h to obtain the coating material.
3. The method for preparing a three-way catalyst based on a ceramic carrier according to claim 2, wherein the weight ratio of citric acid, water and aluminum nitrate is (1-3): (3-4): 1.
4. the method for preparing a three-way catalyst based on a ceramic carrier according to claim 1, wherein the density of the ceramic honeycomb carrier is 2.1-2.2g/cm 3 。
5. The method for preparing a catalyst based on a three-way catalyst ceramic carrier according to claim 1, wherein the weight ratio of the coating material to the aqueous solution of the alumina dry glue powder is 1: (2.5-3.2).
6. The method for preparing a catalyst based on a three-way catalyst ceramic carrier according to claim 1, wherein the pore volume of the alumina dry glue powder is not less than 1 mL/g.
7. The method for preparing a catalyst based on a three-way catalyst ceramic carrier according to claim 1, wherein the mass fraction of the aqueous solution of the alumina dry glue powder is 15-20 wt%.
8. The method for preparing a three-way catalyst based on a ceramic carrier according to claim 1, wherein the honeycomb ceramic carrier is treated with 10 wt% acid solution and then soaked in the coating slurry.
9. The preparation method of the catalyst based on the three-way catalyst ceramic carrier according to claim 1, wherein the honeycomb ceramic carrier is placed in the coating slurry to be soaked for 1-3min, then taken out to stand for 5-8min, and then repeatedly soaked for 2-3 times, and when repeatedly soaked, the honeycomb ceramic carrier is kept stand for 5-8 min.
10. A catalyst based on a three-way catalyst ceramic carrier, characterized in that the catalyst is prepared by the preparation method according to any one of claims 1 to 9.
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587231A (en) * | 1983-11-21 | 1986-05-06 | Nissan Motor Co., Ltd. | Method of producing monolithic catalyst for purification of exhaust gas |
| EP0624399A1 (en) * | 1993-05-14 | 1994-11-17 | Institut Francais Du Petrole | Preparation process of a catalyst usable for treating exhaust gasses from internal combustion engines |
| US5492878A (en) * | 1992-03-31 | 1996-02-20 | Mitsui Mining & Smelting Co., Ltd. | Catalyst for cleaning exhaust gas with alumina, ceria, zirconia, nickel oxide, alkaline earth oxide, and noble metal catalyst, and method for preparing |
| CN1184704A (en) * | 1997-10-31 | 1998-06-17 | 北京绿创环保科技有限责任公司 | Ternary composite metal oxide catalyst for treating automobile's waste gas, and method for preparing same |
| CN1436594A (en) * | 2002-02-07 | 2003-08-20 | 中国石油化工股份有限公司 | Prepn process of waste gas purifying catalyst containing noble metal |
| CN1453073A (en) * | 2002-04-26 | 2003-11-05 | 中国石油化工股份有限公司 | Method of loading automobile tail gas purifying catalyst onto honeycomb carrier |
| CN101653730A (en) * | 2009-08-26 | 2010-02-24 | 南京英斯威尔环保科技有限公司 | Three-way catalyst taking cordierite honeycomb ceramics as carrier |
| CN102784639A (en) * | 2012-08-28 | 2012-11-21 | 新地能源工程技术有限公司 | Coal-bed methane deoxidization catalyst and preparation method and application of coal-bed methane deoxidization catalyst |
| CN109225213A (en) * | 2018-10-08 | 2019-01-18 | 江苏几维环境科技有限公司 | A kind of preparation method of motor vehicle tail-gas purifying close coupling three-way catalyst |
| CN110124659A (en) * | 2019-06-20 | 2019-08-16 | 中自环保科技股份有限公司 | A kind of cerium zirconium aluminum matrix composite, cGPF catalyst and preparation method thereof |
| CN111111657A (en) * | 2018-11-01 | 2020-05-08 | 中国石油化工股份有限公司 | Catalyst for catalytic combustion of acrylic acid waste gas and preparation method and application thereof |
| CN111957312A (en) * | 2020-08-21 | 2020-11-20 | 包头稀土研究院 | Catalyst for motor vehicle tail gas and preparation method and application thereof |
| CN111974390A (en) * | 2020-08-21 | 2020-11-24 | 包头稀土研究院 | Catalyst for tail gas of diesel vehicle, preparation process and application |
| CN112439423A (en) * | 2019-08-30 | 2021-03-05 | 大连海事大学 | Sulfur-resistant NO oxidation regular structure catalyst and preparation method and application thereof |
| CN114251158A (en) * | 2020-09-24 | 2022-03-29 | 广东加南环保生物科技有限公司 | Diesel exhaust particulate matter catalytic filter and method for manufacturing same |
| CN114247448A (en) * | 2020-09-24 | 2022-03-29 | 广东加南环保生物科技有限公司 | Oxidation type catalyst for diesel engine exhaust aftertreatment and manufacturing method thereof |
-
2022
- 2022-05-23 CN CN202210565993.1A patent/CN114849697B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587231A (en) * | 1983-11-21 | 1986-05-06 | Nissan Motor Co., Ltd. | Method of producing monolithic catalyst for purification of exhaust gas |
| US5492878A (en) * | 1992-03-31 | 1996-02-20 | Mitsui Mining & Smelting Co., Ltd. | Catalyst for cleaning exhaust gas with alumina, ceria, zirconia, nickel oxide, alkaline earth oxide, and noble metal catalyst, and method for preparing |
| EP0624399A1 (en) * | 1993-05-14 | 1994-11-17 | Institut Francais Du Petrole | Preparation process of a catalyst usable for treating exhaust gasses from internal combustion engines |
| CN1184704A (en) * | 1997-10-31 | 1998-06-17 | 北京绿创环保科技有限责任公司 | Ternary composite metal oxide catalyst for treating automobile's waste gas, and method for preparing same |
| CN1436594A (en) * | 2002-02-07 | 2003-08-20 | 中国石油化工股份有限公司 | Prepn process of waste gas purifying catalyst containing noble metal |
| CN1453073A (en) * | 2002-04-26 | 2003-11-05 | 中国石油化工股份有限公司 | Method of loading automobile tail gas purifying catalyst onto honeycomb carrier |
| CN101653730A (en) * | 2009-08-26 | 2010-02-24 | 南京英斯威尔环保科技有限公司 | Three-way catalyst taking cordierite honeycomb ceramics as carrier |
| CN102784639A (en) * | 2012-08-28 | 2012-11-21 | 新地能源工程技术有限公司 | Coal-bed methane deoxidization catalyst and preparation method and application of coal-bed methane deoxidization catalyst |
| CN109225213A (en) * | 2018-10-08 | 2019-01-18 | 江苏几维环境科技有限公司 | A kind of preparation method of motor vehicle tail-gas purifying close coupling three-way catalyst |
| CN111111657A (en) * | 2018-11-01 | 2020-05-08 | 中国石油化工股份有限公司 | Catalyst for catalytic combustion of acrylic acid waste gas and preparation method and application thereof |
| CN110124659A (en) * | 2019-06-20 | 2019-08-16 | 中自环保科技股份有限公司 | A kind of cerium zirconium aluminum matrix composite, cGPF catalyst and preparation method thereof |
| CN112439423A (en) * | 2019-08-30 | 2021-03-05 | 大连海事大学 | Sulfur-resistant NO oxidation regular structure catalyst and preparation method and application thereof |
| CN111957312A (en) * | 2020-08-21 | 2020-11-20 | 包头稀土研究院 | Catalyst for motor vehicle tail gas and preparation method and application thereof |
| CN111974390A (en) * | 2020-08-21 | 2020-11-24 | 包头稀土研究院 | Catalyst for tail gas of diesel vehicle, preparation process and application |
| CN114251158A (en) * | 2020-09-24 | 2022-03-29 | 广东加南环保生物科技有限公司 | Diesel exhaust particulate matter catalytic filter and method for manufacturing same |
| CN114247448A (en) * | 2020-09-24 | 2022-03-29 | 广东加南环保生物科技有限公司 | Oxidation type catalyst for diesel engine exhaust aftertreatment and manufacturing method thereof |
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| CN114849697B (en) | 2023-10-27 |
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