CN106391429A - Coating processing method of catalyst for automobile tail gas purifier - Google Patents

Coating processing method of catalyst for automobile tail gas purifier Download PDF

Info

Publication number
CN106391429A
CN106391429A CN201610792463.5A CN201610792463A CN106391429A CN 106391429 A CN106391429 A CN 106391429A CN 201610792463 A CN201610792463 A CN 201610792463A CN 106391429 A CN106391429 A CN 106391429A
Authority
CN
China
Prior art keywords
coating
catalyst
coated
tail gas
processing method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610792463.5A
Other languages
Chinese (zh)
Inventor
刘华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhu Evershine Automotive Component Co Ltd
Original Assignee
Wuhu Evershine Automotive Component Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhu Evershine Automotive Component Co Ltd filed Critical Wuhu Evershine Automotive Component Co Ltd
Priority to CN201610792463.5A priority Critical patent/CN106391429A/en
Publication of CN106391429A publication Critical patent/CN106391429A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • 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
    • 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
    • B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
    • 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
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2451/00—Type of carrier, type of coating (Multilayers)

Abstract

The invention provides a coating processing method of a catalyst for an automobile tail gas purifier. A honeycomb aluminum block carrier is sequentially coated with a Pd coating and an Rh coating. The method comprises the following steps: ZrO2, Pr6O11, La2O3, gamma-Al2O3, nitidine and a proper amount of deionized water are subject to ball milling and mixing, and palladium nitrate is added into a mixture to be evenly mixed to obtain coating slurry A; the honeycomb aluminum block carrier is coated with the coating slurry A, roasting is finally carried out, and the Pd coating is obtained; ZrO2, Y2O3, CeO2, La2O3, gamma-Al2O3, nitidine and the proper amount of deionized water are subject to ball milling and mixing, rhodium nitrate is added into the mixture to be evenly mixed, and coating slurry B is obtained; the honeycomb aluminum block carrier coated with the Pd coating is coated with the coating slurry B, roasting is finally carried out, and the Rh coating is obtained, so that the catalyst for the automobile tail gas purifier is obtained. The coating processing method is reasonable in technology design, high in coating efficiency and capable of obviously shortening the production time.

Description

The coating processing method of automobile exhaust purifier catalyst
Technical field
The present invention relates to auto industry technical field, more particularly, to a kind of coating of automobile exhaust purifier catalyst adds Work method.
Background technology
Raising quality of life being required with expanding economy and people, air pollution problems inherent has become as and receives much attention Global problem.The wide range of haze event of domestic frequent generation carries to the Treatment process of air pollution and purifier structure Go out higher requirement.Automobile pollution is under the trend increasing year by year at home, as air pollutants important sources it One vehicle exhaust has important impact to air pollution.
The exhaust gas component that automobile is discharged mainly has Hydrocarbon, oxynitride, carbon monoxide, granulated carbon etc., most The concentration of tail gas has reached the degree to harm, and current automobile exhaust purifier clean-up effect is single, to tail gas Clean-up effect is limited, and complex structure, relatively costly.Therefore, it is necessary to provide a kind of automobile exhaust purifier, above-mentioned to solve Problem.
Cleaning catalyst for tail gases of automobiles mainly adopts ternary catalyst systems, and three-way catalyst is made up of two parts：Honeycomb The pottery of shape or metallic carrier, and it is attached to supported catalyst coating.Catalyst coat generally larger compares table by having The inorganic oxide material of area is (as γ-Al2O3And CeO2Deng) and be supported on oxide surface noble metal active component (often For one or more of Pt (platinum), Pd (palladium), Rh (rhodium)) composition.Existing cleaning catalyst for tail gases of automobiles is primarily present urges Change that efficiency is low, the defect such as service life is short.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of automobile exhaust purifier, net with the vehicle exhaust that solves current Change single, limited to the clean-up effect of tail gas, and complex structure, the relatively costly problem of device clean-up effect.Meanwhile, the present invention goes back Provide a kind of automobile exhaust purifier catalyst and its coating processing method.
For solving above-mentioned technical problem, the technical solution used in the present invention is：
A kind of automobile exhaust purifier, including：Clean room that air inlet is connected with described air inlet and with described purification The gas outlet of room connection；The internal position near described air inlet in described clean room is provided with honeycomb aluminium block；Inside described clean room Position near described gas outlet is provided with ternary catalyzing unit；The side of described clean room internal duct is provided with ozonator；Institute State and there is inside honeycomb aluminium block the hole being interconnected, the hole wall of described hole is coated with catalyst.
Described honeycomb aluminium block is detachably connected with the inwall of described clean room.
The side of described ozonator is provided with fan.
Automobile exhaust purifier catalyst, including honeycomb aluminium block carrier, hole density is 550cpsi, and duct wall thickness is 3.8mil, volume is 0.85L；Pd coating is coated with honeycomb aluminium block carrier, the coated weight of Pd coating is 120g/L；Apply in Pd Rh coating is coated with layer, the coated weight of Rh coating is 85g/L；Wherein, in Pd coating, the content of Pd is 80g/ft3, Rh coating The content of middle Rh is 15g/ft3.
The coating processing method of automobile exhaust purifier catalyst, step is as follows：
1. coat Pd coating
ZrO by 84g2, the Pr of 36g6O11, the La of 7.2g2O3, γ-the Al of 82.8g2O3, the nitidine of 3g and appropriate Deionized water ball milling mixing, then 5g Palladous nitrate. is added thereto mix homogeneously obtains coating slurry A；Then according to the painting of 120g/L Coating slurry painting A is layed onto on honeycomb aluminium block carrier the amount of covering, and finally roasting 6 hours at 650 DEG C, obtain Pd coating；
2. coat Rh coating
ZrO by 76.5g2, the Y of 13.5g2O3, the CeO of 4g2, the La of 4g2O3, γ-the Al of 96g2O3, the zanthoxylum nitidum of 2g Alkali and appropriate amount of deionized water ball milling mixing, then 0.5g rhodium nitrate is added thereto mix homogeneously obtains coating slurry B；Then according to Coating slurry B is coated on the honeycomb aluminium block carrier having been coated with Pd coating by the coated weight of 85g/L, finally roasting 6 at 650 DEG C Hour, obtain Rh coating, thus automobile exhaust purifier catalyst is obtained.
Advantage for present invention with effect is：
1), the automobile exhaust purifier of the present invention, including：Clean room that air inlet is connected with described air inlet and with The gas outlet of described clean room connection；The internal position near described air inlet in described clean room is provided with honeycomb aluminium block；Described net Change chamber interior and be provided with ternary catalyzing unit near the position of described gas outlet；The side of described clean room internal duct is provided with ozone and sends out Raw device；There is inside described honeycomb aluminium block the hole being interconnected, the hole wall of described hole is coated with catalyst；Can successively lead to Cross honeycomb aluminium block, ozonator and ternary catalyzing unit and catalytic purification is carried out to vehicle exhaust, effectively lifting is net to tail gas Change effect, structure is simple, and cost is relatively low.
2), automobile exhaust purifier catalyst, by appropriate design coating element and proportioning, can make catalyst load Pd and Rh has very high high-temperature aging resisting ability, thus realizing being obviously improved of catalytic efficiency and significantly prolonging of service life Long.
3), the coating processing method of automobile exhaust purifier catalyst, rationally, coating efficiency is high, can be bright for technological design The aobvious shortening production time.
Brief description
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of the automobile exhaust purifier of the present invention；
Fig. 2 is the schematic diagram of the honeycomb aluminium block of automobile exhaust purifier of the present invention.
In figure：Air inlet 1, clean room 2, gas outlet 3, honeycomb aluminium block 21, ternary catalyzing unit 23, ozonator 22, hole Hole 210, fan 24.
Specific embodiment
Embodiment 1
As shown in Figure 1 to Figure 2, the present invention provides a kind of automobile exhaust purifier, including：Air inlet 1 and air inlet 1 are even Logical clean room 2 and the gas outlet 3 connecting with clean room 2.Vehicle exhaust can enter automobile exhaust purifier from air inlet 1 Clean room 2, after the purification of clean room 2, discharges from gas outlet 3.
Specifically, the internal position near air inlet 1 in clean room 2 is provided with honeycomb aluminium block 21, has inside honeycomb aluminium block 21 The hole 210 being interconnected, the hole wall of hole 210 is coated with catalyst, can be by the particulate matter filter deposition in tail gas to honeybee In the hole 210 of nest aluminium block 21, and catalytic purification is carried out to tail gas by the catalyst covering in hole 210, increase tail gas With the contact surface area of catalyst, tail gas and catalyst is enable to be fully contacted, excellent catalytic effect.Clean room 2 internal near going out The position of QI KOU 3 is provided with ternary catalyzing unit 23, harmful gass such as carbon monoxide etc. can be converted into carbon dioxide etc. and be drained into greatly In gas.The side of clean room 2 internal duct is provided with ozonator 22, can be decomposed by the harmful substance that high frequency oscillation makes tail gas Become non-toxic gas, thus reaching the purpose of purifying vehicle exhaust.Wherein, honeycomb aluminium block 21 and the inwall of clean room 2 detachably connect Connect, the side of ozonator 22 is provided with fan 24, during ozonator 22 work, fan 24 and ozonator 22 work simultaneously Make, the purification efficiency of tail gas can be lifted.
Embodiment 2
Automobile exhaust purifier catalyst, including honeycomb aluminium block carrier, hole density is 550cpsi, and duct wall thickness is 3.8mil, volume is 0.85L；Pd coating is coated with honeycomb aluminium block carrier, the coated weight of Pd coating is 120g/L；Apply in Pd Rh coating is coated with layer, the coated weight of Rh coating is 85g/L；Wherein, in Pd coating, the content of Pd is 80g/ft3, Rh coating The content of middle Rh is 15g/ft3.
Embodiment 3
The coating processing method of automobile exhaust purifier catalyst, step is as follows：
1. coat Pd coating
ZrO by 84g2, the Pr of 36g6O11, the La of 7.2g2O3, γ-the Al of 82.8g2O3, the nitidine of 3g and appropriate Deionized water ball milling mixing, then 5g Palladous nitrate. is added thereto mix homogeneously obtains coating slurry A；Then according to the painting of 120g/L Coating slurry painting A is layed onto on honeycomb aluminium block carrier the amount of covering, and finally roasting 6 hours at 650 DEG C, obtain Pd coating；
2. coat Rh coating
ZrO by 76.5g2, the Y of 13.5g2O3, the CeO of 4g2, the La of 4g2O3, γ-the Al of 96g2O3, the zanthoxylum nitidum of 2g Alkali and appropriate amount of deionized water ball milling mixing, then 0.5g rhodium nitrate is added thereto mix homogeneously obtains coating slurry B；Then according to Coating slurry B is coated on the honeycomb aluminium block carrier having been coated with Pd coating by the coated weight of 85g/L, finally roasting 6 at 650 DEG C Hour, obtain Rh coating, thus automobile exhaust purifier catalyst is obtained.
The present invention is not limited to above-described embodiment, and embodiment is exemplary it is intended to be used for explaining the present invention, and can not It is interpreted as limitation of the present invention.

Claims (1)

1. a kind of coating processing method of automobile exhaust purifier catalyst, be coat successively on honeycomb aluminium block carrier Pd, Rh coating is it is characterised in that step is as follows：
1. coat Pd coating
ZrO by 84g2, the Pr of 36g6O11, the La of 7.2g2O3, γ-the Al of 82.8g2O3, the nitidine of 3g and go in right amount from The mixing of sub- water for ball milling, then 5g Palladous nitrate. is added thereto mix homogeneously obtains coating slurry A；Then according to the coated weight of 120g/L Coating slurry painting A is layed onto on honeycomb aluminium block carrier, finally roasting 6 hours at 650 DEG C, obtain Pd coating；
2. coat Rh coating
ZrO by 76.5g2, the Y of 13.5g2O3, the CeO of 4g2, the La of 4g2O3, γ-the Al of 96g2O3, 2g nitidine and Appropriate amount of deionized water ball milling mixing, then 0.5g rhodium nitrate is added thereto mix homogeneously obtains coating slurry B；Then according to 85g/ Coating slurry B is coated on the honeycomb aluminium block carrier having been coated with Pd coating by the coated weight of L, and finally at 650 DEG C, roasting 6 is little When, obtain Rh coating, thus automobile exhaust purifier catalyst is obtained.
CN201610792463.5A 2016-08-31 2016-08-31 Coating processing method of catalyst for automobile tail gas purifier Pending CN106391429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610792463.5A CN106391429A (en) 2016-08-31 2016-08-31 Coating processing method of catalyst for automobile tail gas purifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610792463.5A CN106391429A (en) 2016-08-31 2016-08-31 Coating processing method of catalyst for automobile tail gas purifier

Publications (1)

Publication Number Publication Date
CN106391429A true CN106391429A (en) 2017-02-15

Family

ID=58001011

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610792463.5A Pending CN106391429A (en) 2016-08-31 2016-08-31 Coating processing method of catalyst for automobile tail gas purifier

Country Status (1)

Country Link
CN (1) CN106391429A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104148068A (en) * 2014-08-06 2014-11-19 无锡威孚环保催化剂有限公司 Three-way catalyst capable of quickly igniting automobile exhaust

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104148068A (en) * 2014-08-06 2014-11-19 无锡威孚环保催化剂有限公司 Three-way catalyst capable of quickly igniting automobile exhaust

Similar Documents

Publication Publication Date Title
KR102483435B1 (en) Nitrous oxide removal catalysts for exhaust systems
JP7206045B2 (en) Nitrous oxide removal catalyst for exhaust system
EP2542339B1 (en) Carbon monoxide conversion catalyst
JP7472014B2 (en) N2O removal from automotive exhaust for lean/rich systems
CN1052262A (en) The purification method of diesel exhaust
US20140271391A1 (en) ZPGM TWC Systems Compositions and Methods Thereof
US20140334990A1 (en) ZPGM Diesel Oxidation Catalyst Systems and Methods Thereof
US20220055021A1 (en) Layered three-way conversion (twc) catalyst and method of manufacuring the catalyst
KR101521744B1 (en) Exhaust gas purification catalyst
CN101700497B (en) Ternary catalyst for metal honeycomb carrier of motorcycle and method for preparing same
EP3885030A1 (en) Exhaust gas purification catalyst
CN108126698A (en) A kind of selective cleaning three-way catalyst and preparation method thereof
CN108940279A (en) A kind of tail-gas from gasoline automobiles three-effect catalyst for purifying and preparation method thereof
CN106391429A (en) Coating processing method of catalyst for automobile tail gas purifier
CN106362740A (en) Catalyst for automobile exhaust purifier
CA2740472C (en) Catalyst for exhaust gas purification and method for purifying exhaust gas using the same
US20230338939A1 (en) Diesel Oxidation Catalyst
CN106285843A (en) Automobile exhaust purifier
CN114904512A (en) Mullite-type loaded honeycomb ceramic catalyst surface active coating and preparation method thereof
JP2019147090A (en) Three-dimensional catalyst for exhaust gas purification and manufacturing method therefor, and catalyst for integrated structure type exhaust gas purification
KR20150093203A (en) Zoned diesel oxidation catalyst
CN110586088B (en) Preparation method of segmented national six natural gas equivalence ratio catalyst
WO2024008078A9 (en) Catalytic article for engine exhaust gas treatment
JP2007196150A (en) Oxygen occluding agent and catalyst for cleaning exhaust gas
CN117563926A (en) Production process of low-temperature light-off oxidation emission control purifier in explosion-proof environment

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20170215