CN108212140A - The high oxygen storage capacity Al of automotive catalyst2O3-CeO2-ZrO2-TiO2Coating material and preparation method thereof - Google Patents
The high oxygen storage capacity Al of automotive catalyst2O3-CeO2-ZrO2-TiO2Coating material and preparation method thereof Download PDFInfo
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 239000001301 oxygen Substances 0.000 title claims abstract description 67
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 67
- 239000000463 material Substances 0.000 title claims abstract description 63
- 238000003860 storage Methods 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000003054 catalyst Substances 0.000 claims abstract description 38
- 239000011248 coating agent Substances 0.000 claims abstract description 37
- 238000000576 coating method Methods 0.000 claims abstract description 37
- 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 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- 238000013019 agitation Methods 0.000 claims description 8
- 229910001593 boehmite Inorganic materials 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical group O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 8
- 230000002045 lasting effect Effects 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- BNUDRLITYNMTPD-UHFFFAOYSA-N acetic acid;zirconium Chemical compound [Zr].CC(O)=O BNUDRLITYNMTPD-UHFFFAOYSA-N 0.000 claims description 6
- 150000002823 nitrates Chemical class 0.000 claims description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- DUFCMRCMPHIFTR-UHFFFAOYSA-N 5-(dimethylsulfamoyl)-2-methylfuran-3-carboxylic acid Chemical group CN(C)S(=O)(=O)C1=CC(C(O)=O)=C(C)O1 DUFCMRCMPHIFTR-UHFFFAOYSA-N 0.000 claims description 2
- 150000000703 Cerium Chemical class 0.000 claims description 2
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 2
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical group [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000013618 particulate matter Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 6
- 229910000510 noble metal Inorganic materials 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract 1
- RCFVMJKOEJFGTM-UHFFFAOYSA-N cerium zirconium Chemical compound [Zr].[Ce] RCFVMJKOEJFGTM-UHFFFAOYSA-N 0.000 description 8
- 239000011232 storage material Substances 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- -1 transition elements Inorganic materials 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- XFBXDGLHUSUNMG-UHFFFAOYSA-N alumane;hydrate Chemical compound O.[AlH3] XFBXDGLHUSUNMG-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- QWDUNBOWGVRUCG-UHFFFAOYSA-N n-(4-chloro-2-nitrophenyl)acetamide Chemical compound CC(=O)NC1=CC=C(Cl)C=C1[N+]([O-])=O QWDUNBOWGVRUCG-UHFFFAOYSA-N 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect 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
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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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
- 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
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
-
- 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
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
-
- B01J35/61—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7022—Aliphatic hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
-
- 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
Abstract
The present invention relates to the high oxygen storage capacity Al of automotive catalyst2O3‑CeO2‑ZrO2‑TiO2Coating material and preparation method thereof, the hydrogen-storing material is by Al2O3、CeO2、ZrO2And TiO2According to a certain percentage, it is synthesized by sol-gal process, there is high specific surface area (about 180m2/ g) and storage oxygen capacity (about 800 μm of ol/g).Meanwhile AlCeZrTiOx coating materials of the present invention, through 1000 DEG C of high-temperature roasting 4h, specific surface area remains above 80m2/ g, oxygen storage capacity is higher than 480 μm of ol/g, available in Vehicle Exhaust Gas Cleaning Catalysts.In addition, the present invention also provides the preparation method of the hydrogen-storing material, the preparation method substantially reduces its production cost, has control process simple, production equipment is simple, advantages of environment protection departing from the use of noble metal, macromolcular dispersant.
Description
Technical field
The present invention relates to the high oxygen storage capacity Al of automotive catalyst2O3-CeO2-ZrO2-TiO2(being abbreviated as AlCeZrTiOx) coating
Material and preparation method thereof belongs to hydrogen-storing material technical field.
Background technology
With the rapid development of auto industry, motor-vehicle tail-gas becomes the most important source of atmospheric pollution in city, wherein dirty
Contaminate object and based on carbon monoxide, hydrocarbon and oxynitrides.During motor vehicle exhaust emission, due to automobile frequency
It is numerous the operations such as start, accelerate, brake, cause exhaust gas component complicated and changeable, so that lean combustion, fuel-rich atmosphere go out at random
It is existing, increase the difficulty of purifying vehicle exhaust.Hydrogen-storing material can adjust the oxidant in tail gas and go back because it can store up/oxygen release
The ratio of former agent can store oxygen under lean-burn condition and oxygen is provided under rich condition so that carbon monoxide, hydrocarbon
And oxynitrides has higher conversion ratio simultaneously.Therefore, the quality of hydrogen-storing material Oxygen storage capacity directly affects turning for tail gas
Change efficiency.At present, CeO2With material containing Ce due to its unique Oxygen storage capacity, it is widely used in auto-exhaust catalyst, but pure
CeO2Thermal stability it is not high and storage oxygen rely primarily on surface progress, under the high temperature conditions using rear specific surface area substantially under
Drop so that its Oxygen storage capacity substantially reduces, and eventually leads to catalyst failure.Therefore the research of research workers is gathered in novel
Cerium zirconium hydrogen-storing material and its thermal stability, disclosed Ce based oxygen storage materials mainly have as follows：
" hydrogen-storing material " disclosed in the Chinese patent of Publication No. CN101484240A, with rare earth element, transition elements, alkali
Earth metal and noble metal are raw material, form solid solution by the compound and noble metal of rare earth element, alkaline-earth metal and zirconium to carry
The Oxygen storage capacity of high material." hydrogen-storing material " disclosed in the Chinese patent of Publication No. CN105792930A, using Cu, Ag, Au,
Pt, Pd, Rh, Ru, Ir and the active metal mixed with them also include the mixed oxide of binary, ternary or higher member, lead to
It crosses and adjusts its mixed proportion, prepare the multicomponent material with higher oxygen storage capacity.Both the above hydrogen-storing material passes through noble metal
The oxygen storage capacity of material is improved, cost is higher, user is difficult to receive.Disclosed in the Chinese patent of Publication No. CN103127925A
" cerium zirconium based solid solution rare earth oxygen storage material and preparation method thereof ", prepares its nitrate, then adjust by cerium zirconium oxide first
Acid-base value is co-precipitated cerium zirconium, and roasting after drying obtains that particle is smaller, specific surface area is larger, high temperature anti-aging property is stronger
Cerium zirconium hydrogen-storing material.The specific surface of the hydrogen-storing material fresh oxygen is up to 120.18m2/ g, but after 1000 DEG C are heat-treated 4 hours,
Specific surface is drastically reduced to 35.86m2/ g limits its use on automotive catalyst.In Publication No. CN104001492A
" preparation process of cerium zirconium based oxygen storage material " disclosed in state's patent, using rare earth carbonate as raw material, by molten material, allotment, precipitation,
Isothermal holding, washing, calcination and the technical process of crushing, prepare cerium zirconium based oxygen storage material.The technique using carbonate as raw material,
Although the preferable cerium zirconium based oxygen storage material of pore structure can be made, carbonate is relatively stablized or even at up to 1000 DEG C
It cannot decompose completely, so that the impurity content of cerium zirconium based oxygen storage material is higher and preparation process is more complicated.
Hydrogen-storing material disclosed above, oxygen storage capacity is higher, but the production cost having is high, and some thermostabilizations are poor, have
Be difficult to avoid that containing higher impurity.But the high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst of the present invention and
The research of preparation method has not been reported.
Invention content
For the above-mentioned prior art there are the problem of and deficiency, the present invention provides a kind of high oxygen storage capacities of automotive catalyst
Al2O3-CeO2-ZrO2-TiO2(being abbreviated as AlCeZrTiOx) coating material and preparation method thereof.The preparation of the material is departing from big
The use of dispersal agent molecule and carbonate or alkali, impurity content is low, while has high thermal stability and oxygen storage capacity.The present invention
It is achieved through the following technical solutions.
High oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst and preparation method thereof, are as follows：
(1) a certain amount of cerium salt is weighed first to be dissolved in appropriate deionized water, adds in suitable oxygen under agitation
Change aluminium hydrate and nano-titanium dioxide, appropriate hydrogen peroxide (2~8ml, 30wt%) is added dropwise after persistently stirring 30~60min, and
Suitable zirconates is added in after 5 minutes, and lasting stirring becomes colloidal sol until slurry.Finally dried under conditions of 120~200 DEG C
Colloidal sol, and calcine 4h under different temperatures (700~1000 DEG C) and obtain the high oxygen storage capacity AlCeZrTiO of automotive catalystxCoating material
Material.
(2) chemical composition of the high oxygen storage capacity AlCeZrTiOx coating materials in the step (1) and weight percent contain
It measures and is：Al2O3For 40~60wt%, CeO2For 25~45wt%, TiO2For 1~5wt%, ZrO2For 10~20wt%.
(3) specific surface area of the high oxygen storage capacity AlCeZrTiOx coating materials in the step (1) is 80~180m2/ g,
Storage oxygen capacity is 480~800 μm of ol/g.Through 1000 DEG C of high-temperature roasting 4h, specific surface area remains above 80m2/ g, oxygen storage capacity are high
In 480 μm of ol/g.
(4) the high oxygen storage capacity AlCeZrTiOx coating materials in the step (1) can be used as three-way catalyst, cDPF, CNG
The auxiliary agent of catalyst, particulate matter catalyst (POC) or NOx storage catalysts, to improve the catalytic performance of catalyst.
(5) the used silicon source in the step (1) is boehmite, and cerium source is cerous nitrate, and titanium source is anatase
Type nano-titanium dioxide, zirconium source are zirconium acetate solutions.
The beneficial effects of the invention are as follows：
(1) the high oxygen storage capacity AlCeZrTiO of automotive catalyst of the inventionxThe specific surface area of coating material is 80~180m2/
G, storage oxygen capacity are 480~800 μm of ol/g.Through 1000 DEG C of high-temperature roasting 4h, specific surface area remains above 80m2/ g, oxygen storage capacity
Higher than 480 μm ol/g.
Available in Vehicle Exhaust Gas Cleaning Catalysts.
(2) the high oxygen storage capacity AlCeZrTiO of automotive catalyst of the inventionxContaining Zr, Al, Ti element in coating material, have
Conducive to the activity and thermal stability for improving catalyst.
(3) high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst of the present invention and preparation method thereof, preparation process
Departing from the use of noble metal, organic dispersing agent and carbonate or alkali, production cost, and AlCeZrTiOx coating materials are substantially reduced
Impurity content in material is low.
Description of the drawings
Fig. 1 is oxygen storage capacity of the AlCeZrTiOx coating materials of frozen composition under different calcination temperatures.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
It is weighed first containing CeO2Cerous nitrate salt for 25g is dissolved in appropriate deionized water, adds in contain under agitation
Al2O3For the boehmite of 60g and the nano-anatase TiO of 5g2, 2ml hydrogen peroxide is added dropwise after persistently stirring 30min
(30wt%), and added in after 5 minutes containing ZrO2For the acetic acid zirconium of 10g, lasting stirring becomes colloidal sol until slurry.Finally exist
Colloidal sol is dried at 120 DEG C, and calcines 4h under the conditions of 700 DEG C and obtains the high oxygen storage capacity AlCeZrTiO of automotive catalystxCoating material
Material.
The AlCeZrTiOxThe specific surface area of coating material is 147.32m2/ g, oxygen storage capacity are 537 μm of ol/g.
Embodiment 2
It is weighed first containing CeO2Cerous nitrate salt for 45g is dissolved in appropriate deionized water, adds in contain under agitation
Al2O3For the boehmite of 40g and the nano-anatase TiO of 5g2, 8ml hydrogen peroxide is added dropwise after persistently stirring 30min
(30wt%), and added in after 5 minutes containing ZrO2For the acetic acid zirconium of 10g, lasting stirring becomes colloidal sol until slurry.Finally exist
Colloidal sol is dried at 200 DEG C, and calcines 4h under the conditions of 700 DEG C and obtains the high oxygen storage capacity AlCeZrTiO of automotive catalystxCoating material
Material.
The AlCeZrTiOxThe specific surface area of coating material is 135.47m2/ g, oxygen storage capacity are 701 μm of ol/g.
Embodiment 3
It is weighed first containing CeO2Cerous nitrate salt for 35g is dissolved in appropriate deionized water, adds in contain under agitation
Al2O3For the boehmite of 50g and the nano-anatase TiO of 2g2, 5ml hydrogen peroxide is added dropwise after persistently stirring 30min
(30wt%), and added in after 5 minutes containing ZrO2For the acetic acid zirconium of 13g, lasting stirring becomes colloidal sol until slurry.Finally exist
Colloidal sol is dried at 120 DEG C, and calcines 4h under the conditions of 700 DEG C and obtains the high oxygen storage capacity AlCeZrTiO of automotive catalystxCoating material
Material.
The AlCeZrTiOxThe specific surface area of coating material is 167.656m2/ g, oxygen storage capacity are 545 μm of ol/g.
Embodiment 4
It is weighed first containing CeO2Cerous nitrate salt for 35g is dissolved in appropriate deionized water, adds in contain under agitation
Al2O3For the boehmite of 50g and the nano-anatase TiO of 2g2, 5ml hydrogen peroxide is added dropwise after persistently stirring 30min
(30wt%), and added in after 5 minutes containing ZrO2For the acetic acid zirconium of 13g, lasting stirring becomes colloidal sol until slurry.Finally exist
Colloidal sol is dried at 120 DEG C, and calcines 4h under the conditions of 800 DEG C and obtains the high oxygen storage capacity AlCeZrTiO of automotive catalystxCoating material
Material.
The AlCeZrTiOxThe specific surface area of coating material is 103.07m2/ g, oxygen storage capacity are 750 μm of ol/g.
Embodiment 5
It is weighed first containing CeO2Cerous nitrate salt for 35g is dissolved in appropriate deionized water, adds in contain under agitation
Al2O3For the boehmite of 50g and the nano-anatase TiO of 2g2, 5ml hydrogen peroxide is added dropwise after persistently stirring 30min
(30wt%), and added in after 5 minutes containing ZrO2For the acetic acid zirconium of 13g, lasting stirring becomes colloidal sol until slurry.Finally exist
Colloidal sol is dried at 120 DEG C, and calcines 4h under the conditions of 1000 DEG C and obtains the high oxygen storage capacity AlCeZrTiO of automotive catalystxCoating material
Material.
The AlCeZrTiOxThe specific surface area of coating material is 83.26m2/ g, oxygen storage capacity are 487 μm of ol/g.
Claims (7)
1. the preparation method of the high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst, it is characterised in that be as follows：
A certain amount of cerium salt is weighed first to be dissolved in appropriate deionized water, adds in suitable aluminium oxide and nanometer two under agitation
After persistently stirring 30~60min i.e. 2~8ml, 30wt% hydrogen peroxide is added dropwise in right amount, and add in after 5 minutes suitable in titanium oxide
Zirconates, lasting stirring become colloidal sol until slurry, colloidal sol are finally dried under conditions of 120~200 DEG C, and 700~1000
4h is calcined at DEG C and obtains the high oxygen storage capacity AlCeZrTiO of automotive catalystxCoating material.
2. the preparation method of the high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst according to claim 1, special
Sign is：The chemical composition and weight percent content of high oxygen storage capacity AlCeZrTiOx coating materials be：Al2O3For 40~
60wt%, CeO2For 25~45wt%, TiO2For 1~5wt%, ZrO2For 10~20wt%.
3. the preparation method of the high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst according to claim 1, special
Sign is：The specific surface area of high oxygen storage capacity AlCeZrTiOx coating materials is 80~180m2/ g, storage oxygen capacity are 480~800 μ
Mol/g, through 1000 DEG C of high-temperature roasting 4h, specific surface area remains above 80m2/ g, oxygen storage capacity are higher than 480 μm of ol/g.
4. the preparation method of the high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst according to claim 1, special
Sign is：Used silicon source is boehmite, and cerium source is cerous nitrate, and titanium source is anatase-type nanometer titanium dioxide, zirconium source
It is zirconium acetate solution.
5. the preparation method of the high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst, it is characterised in that be as follows：
It is weighed first containing CeO2Cerous nitrate salt for 25g is dissolved in appropriate deionized water, is added under agitation containing Al2O3For 60g
Boehmite and 5g nano-anatase TiO2, 2ml hydrogen peroxide (30wt%) is added dropwise, and 5 after persistently stirring 30min
It is added in after minute containing ZrO2For the acetic acid zirconium of 10g, lasting stirring becomes colloidal sol until slurry, finally dries colloidal sol at 120 DEG C,
And it calcines 4h under the conditions of 700 DEG C and obtains the high oxygen storage capacity AlCeZrTiO of automotive catalystxCoating material, the AlCeZrTiOxCoating
The specific surface area of material is 147.32m2/ g, oxygen storage capacity are 537 μm of ol/g.
6. the high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst prepared by any one of claim 1 to 5 the method,
It is characterized in that：Chemical composition and weight percent content are：Al2O3For 40~60wt%, CeO2For 25~45wt%, TiO2It is 1
~5wt%, ZrO2For 10~20wt%, specific surface area is 80~180m2/ g, storage oxygen capacity is 480~800 μm of ol/g, through 1000
DEG C high-temperature roasting 4h, specific surface area remains above 80m2/ g, oxygen storage capacity are higher than 480 μm of ol/g.
7. the high oxygen storage capacity AlCeZrTiOx coating materials of automotive catalyst prepared by any one of claim 1 to 5 the method should
For the auxiliary agent of three-way catalyst, cDPF, CNG catalyst, particulate matter catalyst (POC) or NOx storage catalysts.
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| CN114130390A (en) * | 2021-10-20 | 2022-03-04 | 四川大学 | Method for preparing integral torch combustion catalyst based on etching method and application |
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