CN107051435A - A kind of manufacture method of vehicle exhaust exhaust gas catalyst - Google Patents
A kind of manufacture method of vehicle exhaust exhaust gas catalyst Download PDFInfo
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- CN107051435A CN107051435A CN201710028153.0A CN201710028153A CN107051435A CN 107051435 A CN107051435 A CN 107051435A CN 201710028153 A CN201710028153 A CN 201710028153A CN 107051435 A CN107051435 A CN 107051435A
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- CN
- China
- Prior art keywords
- mixed
- oxide
- mixed oxide
- zirconium
- praseodymium
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- 239000003054 catalyst Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 20
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 16
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 15
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 12
- 238000010348 incorporation Methods 0.000 claims abstract description 12
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 12
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 12
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 11
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 20
- 229910052763 palladium Inorganic materials 0.000 claims description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 229910052703 rhodium Inorganic materials 0.000 claims description 5
- 239000010948 rhodium Substances 0.000 claims description 5
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 5
- 239000006104 solid solution Substances 0.000 claims description 5
- 239000010970 precious metal Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 8
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 239000012190 activator Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000505 pernicious effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- RCFVMJKOEJFGTM-UHFFFAOYSA-N cerium zirconium Chemical compound [Zr].[Ce] RCFVMJKOEJFGTM-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002341 toxic gas Substances 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
- B01J23/38—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
- 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
- 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
- B01J35/61—Surface area
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
The present invention discloses a kind of manufacture method of vehicle exhaust exhaust gas catalyst, comprises the following steps：1) praseodymium and cerium are mutually mixed, and the molar content of praseodymium and cerium is about the same；2) in step 1) on the basis of incorporation mass fraction be 0 10% zirconium and 0 10% yttrium；3) mix mass fraction immediately after incorporation zirconium and yttrium and be 0 2% noble metal, and be mixed into gamma aluminum oxide, and the mixed volume of gamma aluminum oxide is 0.1 1 moles, so as to form mixed oxide；4) by step 3) mixed oxide that is formed is coated in monomeric carrier surface, mixed oxide made from this method has high-specific surface area and high Oxygen storage capacity in low temperature environment, zirconium and praseodymium increase the surface area stability of mixed oxide, this advantage make it that preparing cost by the tail-gas catalyst that three-way catalyst etc. reduces cold start emission is greatly reduced, and mixed oxide prepared by this method is coated in carrier surface, its weight is about the 30~50% of carrier itself weight.
Description
Technical field
The present invention relates to a kind of manufacture method of vehicle exhaust exhaust gas catalyst.
Background technology
The correlative study for reducing automotive emission is challenging, particularly in environmental legislation increasingly harsh situation
Under.In most of emission reduction strategies, because motor vehicle cold start discharge accounts for a big chunk of exhaust emissions, therefore, machine is reduced
Discharge of the motor-car under cold start is key point.In the motor vehicle starting stage, hydrocarbon in catalyst light-off simultaneously
Pass through gas extraction system before being converted to hydrocarbon.Although eliminating most of hydrocarbon, sub-fraction
Hydrocarbon and pernicious gas are possible to unprocessed and just directly discharged by gas extraction system.
A kind of method for solving the problems, such as cold start emission is that exploitation is a kind of can put the material of oxygen in motor vehicle starting, with
Accelerator activator ignition.Initiation temperature is that catalyst reacts with hydrocarbon and other pernicious gases, by pernicious gas
The innocuous gas such as carbon dioxide are converted into, to reduce temperature during noxious gas emission.It is anti-that catalyst contact oxygen occurs
Exothermic reaction is should be, temperature rise, catalyst reaches the speed of initiation temperature faster.
At present, the mixture of palladium and cerium zirconium mixed oxide carrier, alumina support or above two material is used in conjunction with,
Oxygen is discharged in motor vehicle cold-starting, with accelerator activator ignition.However, the price of palladium is high, catalyst assembly is accounted for
This 95%.Therefore, how effectively nearest research is generally conceived to, in the case where reducing palladium consumption, accelerator activator
Ignition.It is also a scheme for solving the problems, such as cold start-up to increase hardware.In some cases, increase hardware can directly heat exhaust
System catalyst, accelerator activator ignition.Generally, exhaust system increase hardware cost is higher.
The content of the invention
It is made most the technical problem to be solved in the present invention is to provide a kind of manufacture method of vehicle exhaust exhaust gas catalyst
Whole mixed oxide make it that preparing cost by the tail-gas catalyst that three-way catalyst etc. reduces cold start emission is greatly reduced.
To solve the above problems, the present invention is adopted the following technical scheme that：
A kind of manufacture method of vehicle exhaust exhaust gas catalyst, comprises the following steps：
1) praseodymium and cerium are mutually mixed, and the molar content of praseodymium and cerium is about the same；
2) in step 1) on the basis of incorporation mass fraction for 0-10% zirconium and 0-10% yttrium；
3) mix mass fraction immediately after incorporation zirconium and yttrium and be 0-2% noble metal, and be mixed into gamma aluminum oxide, and
The mixed volume of gamma aluminum oxide is 0.1-1 moles, so as to form mixed oxide；
4) by step 3) mixed oxide that is formed is coated in monomeric carrier surface.
Further, the step 3) in the group that is made up of following each thing of noble metal in select：Platinum, rhodium, palladium and with
Upper precious metal composition, can many-sided suitable noble metal of selection.
Further, the step 3) in formed mixed oxide refer to solid solution mixed oxide or alloy, rather than
The physical mixed of single oxide.
Beneficial effects of the present invention are：Mixed oxide made from this method in low temperature environment have high-specific surface area and
High Oxygen storage capacity, meanwhile, the consumption of the noble metal such as palladium is substantially reduced, and the surface area of zirconium and praseodymium increase mixed oxide is stable
Property, this advantage make it that preparing cost by the tail-gas catalyst that three-way catalyst etc. reduces cold start emission is greatly reduced, and is somebody's turn to do
Mixed oxide prepared by method is coated in carrier surface, and its weight is about the 30~50% of carrier itself weight.
Embodiment
Embodiment 1
A kind of manufacture method of vehicle exhaust exhaust gas catalyst, comprises the following steps：
1) praseodymium and cerium are mutually mixed, and the molar content of praseodymium and cerium is about the same；
2) in step 1) on the basis of incorporation mass fraction for 0-10% zirconium and 0-10% yttrium；
3) mix mass fraction immediately after incorporation zirconium and yttrium and be 0-2% noble metal, and be mixed into gamma aluminum oxide, and
The mixed volume of gamma aluminum oxide is 0.1-1 moles, so as to form mixed oxide；
4) by step 3) mixed oxide that is formed is coated in monomeric carrier surface.
The step 3) in the group that is made up of following each thing of noble metal in select：Platinum, rhodium, palladium and above noble metal are mixed
Compound, can many-sided suitable noble metal of selection.
The step 3) in formed mixed oxide refer to solid solution mixed oxide or alloy, rather than single oxide
Physical mixed.
Embodiment 2
A kind of manufacture method of vehicle exhaust exhaust gas catalyst, comprises the following steps：
1) praseodymium and cerium are mutually mixed, and the molar content of praseodymium and cerium is about the same；
2) in step 1) on the basis of incorporation mass fraction for 0-10% zirconium and 0-10% yttrium；
3) mix mass fraction immediately after incorporation zirconium and yttrium and be 0.1-1.5% noble metal, and be mixed into gamma oxidation
Aluminium, and the mixed volume of gamma aluminum oxide is 0.1-1 moles, so as to form final mixed oxide；
4) by step 3) mixed oxide that is formed is coated in monomeric carrier surface.
The step 3) in the group that is made up of following each thing of noble metal in select：Platinum, rhodium, palladium and above noble metal are mixed
Compound, can many-sided suitable noble metal of selection.
The step 3) in formed mixed oxide refer to solid solution mixed oxide or alloy, rather than single oxide
Physical mixed.
Embodiment 3
1) praseodymium and cerium are mutually mixed, and the molar content of praseodymium and cerium is about the same；
2) in step 1) on the basis of incorporation mass fraction for 0-8% zirconium and 0-10% yttrium；
3) mix mass fraction immediately after incorporation zirconium and yttrium and be 0-2% noble metal, and be mixed into gamma aluminum oxide, and
The mixed volume of gamma aluminum oxide is 0.1-1 moles, so as to form mixed oxide；
4) by step 3) mixed oxide that is formed is coated in monomeric carrier surface.
The step 3) in the group that is made up of following each thing of noble metal in select：Platinum, rhodium, palladium and above noble metal are mixed
Compound, can many-sided suitable noble metal of selection.
The step 3) in formed mixed oxide refer to solid solution mixed oxide or alloy, rather than single oxide
Physical mixed；
The step 2) in zirconium content it is fewer, more can guarantee that its Oxygen storage capacity of final mixed oxide and surface-stable
Property.
Mixed oxide made from this method has high-specific surface area and high Oxygen storage capacity in low temperature environment, meanwhile, palladium
Consumption Deng noble metal is substantially reduced, and the surface area stability of zirconium and praseodymium increase mixed oxide, this advantage causes by three
The tail-gas catalyst of the reduction cold start emission such as effect catalyst prepares cost and is greatly reduced, and mixed oxide prepared by this method
Carrier surface is coated in, its weight is about the 30~50% of carrier itself weight.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
The change or replacement expected without creative work, should all be included within the scope of the present invention.
Claims (3)
1. a kind of manufacture method of vehicle exhaust exhaust gas catalyst, it is characterised in that：Comprise the following steps：
1) praseodymium and cerium are mutually mixed, and the molar content of praseodymium and cerium is about the same；
2) in step 1) on the basis of incorporation mass fraction for 0-10% zirconium and 0-10% yttrium；
3) mix mass fraction immediately after incorporation zirconium and yttrium and be 0-2% noble metal, and be mixed into gamma aluminum oxide, and gamma
The mixed volume of aluminum oxide is 0.1-1 moles, so as to form mixed oxide；
4) by step 3) mixed oxide that is formed is coated in monomeric carrier surface.
2. a kind of manufacture method of vehicle exhaust exhaust gas catalyst as claimed in claim 1, it is characterised in that：The step 3)
In the group that is made up of following each thing of noble metal in select：Platinum, rhodium, palladium and above precious metal composition.
3. a kind of manufacture method of vehicle exhaust exhaust gas catalyst as claimed in claim 1, it is characterised in that：The step 3)
The mixed oxide of middle formation refers to solid solution mixed oxide or alloy, rather than single oxide physical mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710028153.0A CN107051435A (en) | 2017-01-13 | 2017-01-13 | A kind of manufacture method of vehicle exhaust exhaust gas catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710028153.0A CN107051435A (en) | 2017-01-13 | 2017-01-13 | A kind of manufacture method of vehicle exhaust exhaust gas catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107051435A true CN107051435A (en) | 2017-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710028153.0A Pending CN107051435A (en) | 2017-01-13 | 2017-01-13 | A kind of manufacture method of vehicle exhaust exhaust gas catalyst |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1436592A (en) * | 2002-02-07 | 2003-08-20 | 中国石油化工股份有限公司 | Prepn process of catalyst for purfying automobile tail gas |
| CN101209417A (en) * | 2006-12-26 | 2008-07-02 | 比亚迪股份有限公司 | Complex and car tail gas purifying catalyst containing the same |
-
2017
- 2017-01-13 CN CN201710028153.0A patent/CN107051435A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1436592A (en) * | 2002-02-07 | 2003-08-20 | 中国石油化工股份有限公司 | Prepn process of catalyst for purfying automobile tail gas |
| CN101209417A (en) * | 2006-12-26 | 2008-07-02 | 比亚迪股份有限公司 | Complex and car tail gas purifying catalyst containing the same |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170818 |
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| WD01 | Invention patent application deemed withdrawn after publication |