CN203362276U - Automobile exhaust catalyst and catalytic converter prepared from same - Google Patents
Automobile exhaust catalyst and catalytic converter prepared from same Download PDFInfo
- Publication number
- CN203362276U CN203362276U CN2013204256215U CN201320425621U CN203362276U CN 203362276 U CN203362276 U CN 203362276U CN 2013204256215 U CN2013204256215 U CN 2013204256215U CN 201320425621 U CN201320425621 U CN 201320425621U CN 203362276 U CN203362276 U CN 203362276U
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- Prior art keywords
- carrier
- rear end
- end carrier
- catalyzer
- coating
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model provides an automobile exhaust catalyst which comprises a front-end carrier and a rear-end carrier. The automobile exhaust catalyst is characterized in that the front-end carrier is in the shape of an elliptic track, the mesh number of the front-end carrier is 3/600, a single front-end coating layer is coated on the front-end carrier by the aid of single palladium, the rear-end carrier is in the shape of an elliptic track, the mesh number of the rear-end carrier is 4/400, and a rear-end coating layer is coated on the rear-end carrier in a partitioned manner by the aid of precious metal. The utility model further provides a catalytic converter. The catalytic converter is low in catalytic conversion ignition temperature, short in ignition time, high in catalytic conversion efficiency, simple in structure and lower in cost, the backpressure loss of the catalytic converter is further reduced, the power of an engine is ensured, and a contribution is made to reduction of oil consumption of a whole automobile.
Description
Technical field
The utility model relates to the motor vehicle exhaust emission process field, is specifically related to the catalyst converter of a kind of auto-exhaust catalyst and preparation thereof.
Background technique
Along with the continuous propelling of process of industrialization, the pollution of atmosphere in city is also thereupon serious, and has had influence on people's normal life and healthy.The vehicle exhaust hazardous emission has become the main source of urban atmospheric pollution, and install three-way catalytic converter additional, is internationally recognized effective purifying vehicle exhaust technical measures, and it can make CO, HC, the NOx of gasoline car discharge greatly reduce.
Three-way catalytic converter (catalyst converter) mainly is comprised of several parts such as shell, heat insulation protection cover, intermediate section, entrance and exit cone section, elastic clamping material, anti-straight-through Sealing-off Catalytic agent, and wherein catalyzer comprises carrier, coating two-part as the technological core of three-way catalytic converter.Wherein, the carrier stock is pottery (MgO
2, Al
2o
3, SiO
2), purpose is to provide the inertia physical arrangement of bearing catalyst coating.For larger catalytic surface is arranged in less volume, carrier surface is made for cellular.Coating, be coated with the extremely loose active layer of one deck at carrier surface, and it is with metallic oxide γ-AL
2o
3be main.Because surface is very coarse, this makes the real area of wall increase approximately 7000 times, has increased greatly the ability of active surface and the storage oxygen of three-way catalytic converter.At the external coated cocatalyst had containing elements such as zirconium Zr and cerium Ce of active layer, the primary catalyst that contains the precious metals such as rhodium Rh, palladium Pd, platinum Pt.Three kinds of pollutants main in motor exhaust are CO, HC, NO
x.The effect of three-way catalytic converter is exactly to utilize the heavy metal on converter to make catalyzer, makes CO, HC, NO
x, O
2deng the chemical reaction of oxidation and reduction occurs between each gas, generate N
2, CO
2, H
2the innocuous gas such as O.
Former catalyst converter is arranged in the gas exhaust manifold rear end, and far away apart from the engine exhaust end, initiation temperature is relatively low, and the catalyst converter light-off time is longer, only can meet state's IV emission standard and bullion content higher.In view of emission standard increasingly strictly reaches appearance, the especially increase of NMHC emission limit set of capital V emission standard, former catalyst converter is high at discharge timing signal HC and NMHC content, can't meet state's V emission standard requirement.Former catalyst converter back pressure is higher simultaneously, when affecting the engine power performance, causes complete-vehicle oil consumption to increase.
Reach and meet state's V emission standard three kinds of methods are arranged usually, the one, by the catalytic converter assembly reach, thereby being raise, initiation temperature shortens light-off time, and reach the catalyst converter purpose of work fast, but be subject to the arrangement spatial constraints, can't move forward; The 2nd, increase the catalyst converter volume, reach and increase the increase of catalyst converter response area, thus the working efficiency of raising catalyst converter, but being subject to equally the arrangement spatial constraints, the catalyst converter volume can't continue to increase, and can only make track type at present; The 3rd, increase bullion content, but cost can significantly rise.
The model utility content
In order to address the above problem, the utility model purpose is: a kind of state's V emission standard that is applicable to meet is provided, and existing good back pressure effect, thus can save again the catalyzer of the less vehicle exhaust of bullion content cost.
An also purpose of the present utility model is to provide a kind of catalyst converter prepared by this catalyzer.
At first, the utility model a kind of catalyzer of vehicle exhaust is provided, comprise front end carrier and rear end carrier; Wherein, described front end carrier is oval track type, and this carrier order number is 3/600, on described front end carrier, is coated with the front end coating, and described front end coating adopts single palladium single layer coating; Described rear end carrier is oval track type, and this carrier order number is 4/400, on the carrier of described rear end, is coated with the rear end coating, and described rear end coating adopts the precious metal zone coated.
Preferably, the length of described rear end carrier is 1.5～3 times of front end carrier lengths.
Preferably, in described front end coating slurries, the mass concentration of palladium is 2.64%, and the upper carrying capacity of described front end coating is 200～214g/L, and preferred value is 214g/L.
Preferably, in the coating slurries of described rear end, the precious metal mass concentration is 0.18%～0.5%, and the upper carrying capacity of described rear end coating is 157～229g/L.
Further, the utility model provides a kind of catalyst converter, and it comprises the catalyzer of above-mentioned vehicle exhaust.
Preferably, described catalyst converter also comprises the cylindrical shell that encapsulates described catalyzer, and is located at the liner between described catalyzer and cylindrical shell;
The front end carrier of described catalyzer is arranged on the inlet end in described cylindrical shell, and the rear end carrier of described catalyzer is arranged on the exhaust end in described cylindrical shell, and the external diameter of described front end carrier and rear end carrier and the inner chamber of described cylindrical shell are complementary.
Preferably, described liner comprises unexpansive formula liner and inflatable seal liner, and between described front end carrier and described cylindrical shell, front end is unexpansive formula liner I, and middle is inflatable seal liner I, and rear end is unexpansive formula liner II; Between described rear end carrier and described cylindrical shell, front end is unexpansive formula liner III, and middle is inflatable seal liner II, and rear end is unexpansive formula liner IV.
The utility model beneficial effect is as follows:
1) the utility model is optimized for 3/600 by the front end carrier order number in former catalyst converter, in conjunction with the front end coating, make catalyst converter front end carrier back pressure descend 19% on original basis, catalyst converter carrier thermal capacity descends 30% simultaneously, guaranteed better ignition, under same conditions of discharge, bullion content saves 27%;
2) the utility model is optimized for 4/400 by rear end carrier order number, in conjunction with the rear end coating, make catalyst converter rear end carrier back pressure descend 11% on original basis, catalyst converter carrier thermal capacity descends 17% simultaneously, guaranteed better ignition, under same conditions of discharge, bullion content saves 18%;
3) for discharge timing signal HC and the higher problem of NMHC content, catalyst converter front end carrier is adopted to single palladium (Pd) coating, and (palladium mainly can promote the oxidation of HC and CO, and anti-sintering property is stable), remove rhodium (Rh) metal in former catalyst converter front end carrier, the price of rhodium (Rh), than palladium (Pd) costliness, can reach the purpose of falling cost;
4) because rear end carrier front end catalytic efficiency is higher, carrier rear end, rear end catalytic efficiency is relatively low, the utility model is by carrying out the classification coating to the rear end carrier, make the precious metal in the carrier of rear end more effectively carry out catalytic conversion reaction, improved catalytic conversion efficiency when having reduced bullion content;
5) the utility model catalytic conversion efficiency is high, and cost is low.
In a word, the utility model, by the optimization to front end carrier and rear end carrier order number and coating, has effectively guaranteed initiation temperature and light-off time, has improved catalytic conversion efficiency, has saved the expensive rhodium of precious metal (Rh) simultaneously, has reduced cost; In addition, the utility model has further reduced the back pressure loss of catalyst converter integral body on the whole, has guaranteed the realization of engine power, and the reduction of complete-vehicle oil consumption is contributed to some extent.
The accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 a, 2b are the utility model front end carrier and front end coating schematic diagram;
Fig. 3 a, 3b are the utility model rear end carrier and zone coated schematic diagram;
Fig. 4 a different meshes carrier thermal capacity and purifying effect (GSA) comparison diagram;
Fig. 4 b different meshes carrier back pressure loss comparison diagram;
Embodiment
Introduce in detail the utility model below in conjunction with accompanying drawing and embodiment thereof.But protection of the present utility model orientation is not limited to following instance, should comprise the full content in claims.
Referring to Fig. 1, the utility model a kind of catalyzer of vehicle exhaust is provided, comprise front end carrier 4 and rear end carrier 8; Wherein, described front end carrier 4 is oval track type, and this carrier order number is 3/600, on described front end carrier 4, is coated with the front end coating, and described front end coating adopts single palladium single layer coating; Described rear end carrier 8 is oval track type, and this carrier order number is 4/400, on described rear end carrier 8, is coated with the rear end coating, and described rear end coating adopts the precious metal zone coated.
In order better to improve the purifying effect of catalyzer to vehicle exhaust, the length of described rear end carrier 8 is 1.5～3 times of front end carrier lengths.
Wherein, in described front end coating slurries, the mass concentration of palladium is 2.64%, and the purity of described palladium is 99.95%, and total content is not less than 90% of theoretical value.The upper carrying capacity of described front end coating is 200～214g/L, and preferred value is 214g/L.The concrete painting method of the coating of this front end carrier can be selected existing any one method.
Wherein, the precious metal in described rear end carrier 8 is palladium and rhodium, and the mass ratio of described palladium and rhodium is preferably 10:8.In the coating slurries of described rear end, the precious metal mass concentration is 0.18%～0.5%, and each bullion content is not less than 90% of theoretical value; The upper carrying capacity of described rear end coating is 157～229g/L.Zone coated described in the utility model refers to that carrier 8 two ends in rear end are coated with the slurries of variable concentrations and upper carrying capacity, as shown in Fig. 3 a, 3b, its concrete grammar is: (1) is by close front end carrier one end 81 of rear end carrier, the slurries that noble metal-coating concentration is 0.3～0.5%, on it, carrying capacity is 157～171g/L; (2) apply subsequently the other end 82 of rear end carrier, the slurries that noble metal-coating concentration is 0.18～0.3%, on it, carrying capacity is 214～229g/L.Preferred, close front end carrier one end 81 of described rear end carrier, the slurries that noble metal-coating concentration is 0.5%, on it, carrying capacity is 171g/L; The other end 82 of described rear end carrier, the slurries that noble metal-coating concentration is 0.18%, on it, carrying capacity is 229g/L.The concrete painting method of the coating of this rear end carrier can be selected existing any one method.
The utility model is optimized for 3/600 by the front end carrier order number in catalyst converter, as shown in Figure 2 a, in conjunction with front end list palladium coating, as shown in Figure 2 b, make catalyst converter front end carrier 4 back pressures descend 19% on original basis, catalyst converter carrier thermal capacity descends 30% simultaneously, has guaranteed better ignition, and under same conditions of discharge, bullion content saves 27%.In addition, the utility model is optimized for 4/400 by rear end carrier order number, as shown in Figure 3 a, in conjunction with rear end subregion coating, as shown in Fig. 3 b, make catalyst converter rear end carrier back pressure descend 11% on original basis, catalyst converter carrier thermal capacity descends 17% simultaneously, guaranteed better ignition, under same conditions of discharge, bullion content saves 18%.
Further, the utility model provides a kind of catalyst converter, and it comprises the catalyzer of above-mentioned vehicle exhaust.
As shown in Figure 1, wherein, described catalyst converter also comprises the cylindrical shell 1 that encapsulates described catalyzer, and is located at the liner between described catalyzer and cylindrical shell 1;
The front end carrier 4 of described catalyzer is arranged on the inlet end in described cylindrical shell 1, and the rear end carrier 8 of described catalyzer is arranged on the exhaust end in described cylindrical shell 1, and the external diameter of described front end carrier 4 and rear end carrier 8 and the inner chamber of described cylindrical shell 1 are complementary.
In order to increase sealing effect, preferably, described liner comprises unexpansive formula liner and inflatable seal liner, and between described front end carrier 4 and described cylindrical shell 1, front end is unexpansive formula liner I2, middle is inflatable seal liner I3, and rear end is unexpansive formula liner II5; Between described rear end carrier 8 and described cylindrical shell 1, front end is unexpansive formula liner III6, and middle is inflatable seal liner II7, and rear end is unexpansive formula liner IV9.
The impact of embodiment's 1 carrier order number on catalyst converter
The utility model selects the order number of front end carrier to be respectively 4.3/600,3.5/600,2.5/900, and rear end carrier order number is respectively 6.5/400,5.5/350,4.3/400 impact detected whole catalyst converter.
Result is as shown in Fig. 4 a, 4b, and conclusion is as follows:
1) according to finding out in above thermal capacity, purifying effect and back pressure loss contrast, the parameters of carrier order several 2/900 is higher, but the carrier body wall that the order number is 2/900 is relatively thin, intensity is poor and the carrier cost is higher, consider the actual conditions that domestic encapsulation ability is weak, front end carrier order number is chosen as to 3/600, and the contribution amount of rear end carrier considering cost and discharge, be chosen as 4/400.
2) the utility model is optimized for 3/600 by the front end carrier order number in former catalyst converter by 4/600, make catalyst converter front end carrier back pressure descend 19% on original basis, catalyst converter carrier thermal capacity descends 16% simultaneously, guaranteed better ignition, purifying effect improves 2%, and under same conditions of discharge, bullion content saves 14%;
3) rear end carrier order number is optimized for 4/400 by 6/400, make catalyst converter rear end carrier back pressure descend 22% on original basis, catalyst converter carrier thermal capacity descends 19% simultaneously, has guaranteed better ignition, purifying effect improves 5%, and under same conditions of discharge, bullion content saves 18%;
The impact of embodiment's 2 coatings on whole catalyst converter
The present embodiment has been selected the front end and back end coating of three kinds of different formulations in table 1, scheme 1 and scheme 2 adopt respectively front end carrier and the rear end carrier of different Precious metals ratios, the rear end carrier of scheme 2 adopts quantitatively and applies in addition, the rear end carrier of scheme 3 adopts zone coated of the present utility model, specifically referring to table 1.
The coating emission result contrast table of table 1 different formulations and scheme
Discharge calibration result according to three kinds of schemes in table 1:
For discharge timing signal HC and the higher problem of NMHC content, to catalyst converter front end carrier, adopt single palladium (Pd) to apply (palladium mainly can promote the oxidation of HC and CO), remove rhodium (Rh) metal in former catalyst converter front end carrier, the price of rhodium (Rh), than palladium (Pd) costliness, can reach the purpose of falling cost.In addition, because rear end carrier front end catalytic efficiency is higher, carrier rear end catalytic efficiency is relatively low, the utility model is by carrying out zone coated to the rear end carrier, make the precious metal in the carrier of rear end can more effectively carry out catalytic conversion reaction, improved the catalytic conversion efficiency of catalyst converter integral body when having reduced bullion content.From the correlation data of table 1, scheme of the present utility model is compared other ratios and quantitative coating scheme, has substantially all effectively improved the conversion ratio of HC and CO and other tail gas NMHC, Nox.In addition, the utility model adopts single palladium coating, because the anti-sintering property of palladium (Pd) is stable, also makes the catalyst converter ablation resistance better.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (7)
1. the catalyzer of a vehicle exhaust, comprise front end carrier and rear end carrier; It is characterized in that, described front end carrier is oval track type, and this carrier order number is 3/600, on described front end carrier, is coated with the front end coating, and described front end coating adopts single palladium single layer coating; Described rear end carrier is oval track type, and this carrier order number is 4/400, on the carrier of described rear end, is coated with the rear end coating, and described rear end coating adopts the precious metal zone coated.
2. catalyzer as claimed in claim 1, is characterized in that, the length of described rear end carrier is 1.5～3 times of front end carrier lengths.
3. catalyzer as claimed in claim 1, is characterized in that, the upper carrying capacity of described front end coating is 200～214g/L.
4. catalyzer as claimed in claim 1, is characterized in that, the upper carrying capacity of described rear end coating is 157～229g/L.
5. a catalyst converter that comprises the described catalyzer of claim 1～4.
6. catalyst converter as claimed in claim 5, is characterized in that, described catalyst converter also comprises the cylindrical shell that encapsulates described catalyzer, and be located at the liner between described catalyzer and cylindrical shell;
The front end carrier of described catalyzer is arranged on the inlet end in described cylindrical shell, and the rear end carrier of described catalyzer is arranged on the exhaust end in described cylindrical shell, and the external diameter of described front end carrier and rear end carrier and the inner chamber of described cylindrical shell are complementary.
7. catalyst converter as claimed in claim 6, it is characterized in that, described liner comprises unexpansive formula liner and inflatable seal liner, between described front end carrier and described cylindrical shell, front end is unexpansive formula liner I, middle is inflatable seal liner I, and rear end is unexpansive formula liner II; Between described rear end carrier and described cylindrical shell, front end is unexpansive formula liner III, and middle is inflatable seal liner II, and rear end is unexpansive formula liner IV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204256215U CN203362276U (en) | 2013-07-17 | 2013-07-17 | Automobile exhaust catalyst and catalytic converter prepared from same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204256215U CN203362276U (en) | 2013-07-17 | 2013-07-17 | Automobile exhaust catalyst and catalytic converter prepared from same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203362276U true CN203362276U (en) | 2013-12-25 |
Family
ID=49810059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204256215U Withdrawn - After Issue CN203362276U (en) | 2013-07-17 | 2013-07-17 | Automobile exhaust catalyst and catalytic converter prepared from same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203362276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343708A (en) * | 2013-07-17 | 2013-10-09 | 安徽江淮汽车股份有限公司 | Automobile exhaust catalyst and prepared catalytic converter thereof |
| CN110748429A (en) * | 2019-02-22 | 2020-02-04 | 长城汽车股份有限公司 | Control strategy for an engine |
-
2013
- 2013-07-17 CN CN2013204256215U patent/CN203362276U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343708A (en) * | 2013-07-17 | 2013-10-09 | 安徽江淮汽车股份有限公司 | Automobile exhaust catalyst and prepared catalytic converter thereof |
| CN103343708B (en) * | 2013-07-17 | 2016-03-02 | 安徽江淮汽车股份有限公司 | The catalyst converter of a kind of auto-exhaust catalyst and preparation thereof |
| CN110748429A (en) * | 2019-02-22 | 2020-02-04 | 长城汽车股份有限公司 | Control strategy for an engine |
| CN110748429B (en) * | 2019-02-22 | 2022-09-09 | 长城汽车股份有限公司 | Control strategy for an engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |