CN103861656A - Carrier of catalyst used for catalyzing soot capturing in diesel engine exhaust gas - Google Patents
Carrier of catalyst used for catalyzing soot capturing in diesel engine exhaust gas Download PDFInfo
- Publication number
- CN103861656A CN103861656A CN201210546839.6A CN201210546839A CN103861656A CN 103861656 A CN103861656 A CN 103861656A CN 201210546839 A CN201210546839 A CN 201210546839A CN 103861656 A CN103861656 A CN 103861656A
- Authority
- CN
- China
- Prior art keywords
- catalyst
- stainless steel
- diesel engine
- screen cloth
- carrier
- 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
Links
Abstract
The invention provides a carrier of a catalyst used for catalyzing soot capturing in diesel engine exhaust gas. The carrier is a stainless steel bar-shaped screen, wherein the pore diameter of the screen is 0.15-0.28 mm, the wave height of the bar-shaped screen is 1-5 mm, the width is 100-200 mm, and the angle of a sine wave shaped pore channel in the bar-shaped screen is 10-80 degrees. The carrier can be used for preparing the catalyst catalyzing the soot capturing in the diesel engine exhaust gas so that the pressure drop of the catalyst is low and the catalytic performance of the catalyst is good.
Description
Technical field
The present invention relates to motor-vehicle tail-gas process field, relate to specifically a kind of catalyst carrier for diesel engine vent gas soot trapping catalysis.
Background technology
In recent years, particularly the particle matter in diesel exhaust (following with " PM " expression) mainly contains the large molecule hydrocarbon particulate (following with " SOF " expression) of solid carbon particulate (following use " SOOT " represents), sulfate (following use " sulfates " represents) and liquid state, and cause the problem about Environmental Health, the particle diameter of PM is generally at 0.01 μ m～10 μ m, wherein 90% diameter of particle < 1 μ m, so easily float in air and by respiratory tract and enter human body.Therefore, government formulate relevant policies are to strengthen the control to diesel engine PM discharge.Meanwhile, when the optimized operation of diesel engine, the discharge capacity of diesel engine PM has obvious reduction, by adherence pressure and coordinate the Electronic Control of the fuel injection system of timing to realize.But be difficult to reach the satisfaction of expection.In addition, the SOF in PM also contains carcinogen.
Related scientific research worker also conducts in-depth research this and tests both at home and abroad, develop inaccessible type ceramic honeycomb body, porous foam ceramic, woven wire, porous metals, opened catalyst forming on flow pattern ceramic honeycomb body or metallic honeycomb bodies and so on infusibility three-dimensional structure etc., temporarily to trap carbon soot particles as main, the carbon soot particles trapping by burnings such as auxiliary additional oil spout, jet, electrical heating, realizes the purification of soot with this.Additional regeneration need to add power generation, need to increase the use cost of client.
Therefore, need to develop a kind of Particulate trap with catalytic, also carbon monoxide, hydrocarbon, nitrogen oxide can be purified, can also face the test of high sulfur content fuel, thereby solve the treating tail gas problem of existing diesel simultaneously.
For the Catalysts and its preparation method (CN1575850A) of purifying waste gas from diesel engine, a kind of Catalysts and its preparation method for purifying waste gas from diesel engine is disclosed, catalyst is removed HC, CO and the SOF in diesel exhaust and is reduced the discharge of particulate.Have for the catalyst of purifying waste gas from diesel engine the catalytic component being deposited on infusibility three-dimensional structure, catalytic component comprises silica-alumina and zeolite, and silica-alumina supports at least one and be selected from the precious metal element of platinum, palladium, rhodium.This catalyst is by joining noble metal component in the slurries of silica alumina, cause therein chemisorbed, then zeolite is added in the mixture of gained, thereby obtain being loaded with the silica alumina of noble metal and the mixed serum of zeolite, infusibility three-dimensional structure is immersed in described mixed serum, cause therein the deposition of catalyst component, roasting resulting composition makes subsequently.But the carrier of the catalyst in this application is inhomogeneous, the decentralization of active component in carrier is not high, thereby causes the purifying rate of soot low; In addition, this catalyst is a kind of foamed ceramics structure, and pressure drop meeting is very large, easily poisoning.
Reduce the catalyst (CN101056692A) of the not platinum group metal of ignition temperature of particulates on diesel particulate filter, provide a kind of catalytic type diesel particulate filter (CDPF) and a kind of from diesel engine exhaust the method for filtration of particulate matters, wherein catalytic type diesel particulate filter comprises a kind of base material and a kind of carbon monoxide-olefin polymeric, wherein carbon monoxide-olefin polymeric comprises at least one first component, at least one second component and at least one the 3rd component, wherein the first component is at least one selected from cerium, first component of lanthanide series and composition thereof, second component is at least one is selected from cobalt, copper, the second component of manganese and composition thereof: the 3rd component comprises strontium, wherein the first component, after second component and the 3rd component roasting, be oxide form.By particle redox reaction on filter, the Catalysts for Reducing on catalytic type diesel particulate filter remove the temperature of particle from CDPF.Catalytic type diesel particulate filter also can comprise wash coat.The wash coat being made by colloidal alumina has higher surface area and pore volume than the wash coat that contains the aluminium oxide that aluminum nitrate makes.But it is too high that the shortcoming of this catalyst is pressure drop, after long-time use, can cause the obstruction of soot in cell walls, easily poisoning, increased considerably the oil consumption of vehicle simultaneously.
A kind of for eliminating the low-temperature combustion catalyst (CN101767012A) of diesel engine carbon black, disclose and a kind ofly do not contained alkali metal and noble metal for eliminating the low-temperature combustion catalyst of diesel engine carbon black, composition is the composite oxides of ferrocerium zirconium, wherein CeO
2molar content be 50%, Fe
2o
3molar content be 5～50%, ZrO
2molar content be 45～0%, the method of preparation has two kinds, method one is co-precipitation hydrothermal synthesis method, method two is mechanical mixing, the concrete steps of method one are: the nitrate of getting Ce, Fe, Zr is configured to by stoichiometric proportion the salting liquid that total concentration is 0.1～0.5mol/L, then adds appropriate H
2o
2, fully stir, evenly mix.Under vigorous stirring, above-mentioned mixed solution is splashed in the ammoniacal liquor of 3～8mol/L with the speed of 2～10mL/min, be precipitated thing.Precipitation completely rear continuation stirs 30～120min, removes part supernatant liquor after aging 30～180min, gained sediment is moved in autoclave (compactedness is 50～70%), in 160～240 DEG C of insulation 24～72h.After products therefrom washs respectively with deionized water and ethanol, 80～120 DEG C of dry 6～24h, obtain target catalyst.This material has very high catalytic activity and heat endurance, and environment is not polluted.The shortcoming of this catalyst is not resistance to sulphur, after long-time use, can cause catalyst poisoning because of the obstruction of the stickums such as thiamines, and this poisoning be irreversible procedure; Owing to being graininess, pressure drop is large, is not suitable for diesel engine condition simultaneously.
The Catalysts and its preparation method (CN1315228) of purifying waste gas from diesel engine, relates to the catalyst of purifying waste gas from diesel engine.This catalyst contains at least one zeolite, and, contain in addition at least one support oxide that is selected from aluminium oxide, silica, titanium dioxide and alumina silicate and at least one noble metal that is selected from platinum, palladium, rhodium and iridium.The feature of this catalyst is that the average oxidation number of precious metal atom is less than 2.5, is to be greater than 3 metal ligand and to be less than the average of 3 oxygen part.In zeolite and support oxide, the microcrystalline form of precious metal atom taking average grain diameter as 1～6nm exists.The defect of this invention is that the arresting efficiency of soot is low, and pressure drop is high, easily poisoning.
From diesel exhaust, remove catalytic filter and the manufacture method (CN1774285) thereof of soot particulates, a kind of catalytic filter has been described, for removing soot particulates from diesel exhaust, this catalytic filter comprises the monolithic oxidation catalyst of its upstream, can the efficient oxidation gaseous contaminant and volatile organic constituents, also comprise the wall-flow filter of downstream catalyst, for being collected in the low temperature ignition of the soot particulates on filter.The present invention also provides the manufacture method of this catalytic filter, comprises the colloid admixture solution of preparing platinum group metal salts and other slaine with water-soluble polymer and reducing agent, this solution is flooded in catalyst carrier, subsequently high-temperature roasting.In the present invention, adopt this catalytic filter to provide alleviating diesel exhaust pollutant is particulate matter (PM) and gaseous contaminant (HC, CO, NO
x) discharge effective measures.This catalyst-assembly is loaded down with trivial details, and cost is higher, has increased the treating tail gas cost of diesel engine; Pressure drop is simultaneously high, easily poisoning.
Summary of the invention
First the present invention provides a kind of bluing liquid, and this bluing liquid contains following component:
Natrium nitrosum, sodium nitrate, NaOH, sodium carbonate, waterglass and water;
The total content of its Sodium Nitrite, sodium nitrate, NaOH, sodium carbonate, waterglass is 5-20%;
Water is 80-95%;
The mass ratio of its Sodium Nitrite, sodium nitrate, NaOH, sodium carbonate, waterglass is 1～5:5～15:1～5:5～10:0.5～3.
Prepare the method for above-mentioned bluing liquid:
Natrium nitrosum, sodium nitrate, NaOH, sodium carbonate, waterglass are added to water.
This bluing liquid can be used for processing stainless steel mesh, makes it be suitable as the catalyst carrier of diesel engine vent gas soot trapping.
The present invention also provides a kind of catalyst carrier of diesel engine vent gas soot trapping, and this catalyst carrier is stainless steel strip screen cloth, and the aperture of screen cloth is 0.15-0.28mm; The crest height of strip screen cloth is 1～5mm, and width is 100～200mm, and sinusoidal waveform duct angle in strip screen cloth is 10～80 degree; Then roll, plasticly obtain cylindric half pass-through type honeycomb, the packaging density of screen cloth is 800～1500g/l.
This stainless strip steel screen cloth is by pressing ripple in ripple punch, then cuts into strip and obtain.
The preferred chemical composition of stainless steel strip screen cloth is: aluminium 6%, chromium 20%, iron 84%.
This catalyst carrier can be used for preparing the catalyst of diesel engine vent gas soot trapping catalysis, makes its pressure drop low, and catalytic performance is good.
The present invention also provides a kind of catalyst of diesel engine vent gas soot trapping, and this catalyst is prepared from by the following method:
1. 5～20% above-mentioned bluing liquid is processed stainless steel mesh, obtains having the stainless steel mesh of oxide-film;
2. the above-mentioned stainless steel mesh with oxide-film is electroplated, formed the stainless steel mesh with active electroplated coating;
3. by pressing ripple with the stainless steel mesh of active electroplated coating, cutting into strip, then roll;
4. then rolled stainless steel mesh is inserted in stainless steel tube and encapsulated soldering, obtain soot trapping catalyst.
Wherein the aperture of stainless steel mesh used is 0.15-0.28mm; Its preferred chemical composition is: aluminium 6%, chromium 20%, iron 84%.The metallic sieve that this chemical composition obtains has higher mechanical strength, larger hot strength, fine and close oxide-film.
Wherein step is processed stainless steel mesh with bluing liquid in 1., refers to stainless steel mesh is placed in to bluing liquid heating boils 10～30min, and heating-up temperature is 60～90 DEG C.
Wherein step is electroplated the stainless steel mesh with oxide-film in 2., carries out successively specifically plating, the plating of titanium liquid and the plating of precious metal solution of earth solution;
The mass concentration of above-mentioned earth solution is 10～40%, and it consists of:
Ce
2(SO
4)
3, H
2o
2and water; Wherein the mass percent of water is 60-90%;
Wherein Ce
2(SO
4)
3with H
2o
2mass ratio be 15～20:1～3;
The electroplating parameter of earth solution is, 50～80 DEG C of bath temperatures, and electroplating time is 60～100min, PH=1～4, baking temperature is 50～80 DEG C.
Above-mentioned titanium liquid is made up of titanium sulfate, nickelous sulfate, nickel chloride, boric acid, lauryl sodium sulfate and asccharin, and wherein the mass ratio of titanium sulfate, nickelous sulfate, nickel chloride, boric acid, lauryl sodium sulfate, asccharin is 50～80:5～10:5～10:1～5:0.5～5:0.5～3;
Titanium liquid electroplating parameter is as follows, 50～60 DEG C of bath temperatures, and electroplating time is 5～30min, PH=3.9～4.2.
Above-mentioned precious metal solution is the nitrate solution of palladium, platinum, and wherein the mass ratio of simple substance palladium, platinum is 5～15:1～5;
Precious metal solution electroplating parameter is as follows, and bath temperature is 45～60 DEG C, and positive plate is platinum plate, and anode and cathode current density is 0.1～5 ampere every square decimeter, and electroplating time is 30～120s.
Wherein step 3. in stainless steel mesh press ripple, cut into strip, crest height is 1～5mm, the width of strip screen cloth is 100～200mm, sinusoidal waveform duct angle in strip screen cloth be 10～80 degree; Then roll, plasticly obtain cylindric half pass-through type honeycomb, the packaging density of screen cloth is 800～1500g/l.
The preparation method of the catalyst carrier of above-mentioned diesel engine vent gas soot trapping catalysis of the present invention is by stainless steel mesh
Wherein step is inserted rolled stainless steel mesh in stainless steel tube and is encapsulated soldering in 4., and stainless steel tube used is corrosion resistant stainless steel tube, wherein Cr content >=18% in stainless steel, Ni content >=12%, Mo content >=2.5%.
The present invention also provides the method for the catalyst of preparing above-mentioned diesel engine vent gas soot trapping, and the method is:
1. 5～20% above-mentioned bluing liquid is processed stainless steel mesh, obtains having the stainless steel mesh of oxide-film;
2. the above-mentioned stainless steel mesh with oxide-film is electroplated, thereby formed the stainless steel mesh with active electroplated coating;
3. by pressing ripple with the stainless steel mesh of active electroplated coating, cutting into strip, then roll;
4. then rolled stainless steel mesh is inserted in stainless steel tube and encapsulated soldering, obtain soot trapping catalyst.
Stainless steel mesh of the present invention is the electrodeposition-type soot trapping catalyst of carrier, to process screen cloth carrier and form dense oxidation film by preparing bluing liquid, electroplate earth solution, Titanium Electroplating liquid, plating precious metal solution etc. is realized the electroplating technology of coating, by plating, active material is carried on the silk muscle of screen cloth uniformly, through pressing ripple moulding, shear, roll, encapsulation, solderings etc. realize the preparation of catalyst, the catalyst of preparing is composite catalyst, purifying the test of 2.3L diesel engine vent gas finds, this catalyst can solve particulate matter (PM) and gaseous contaminant (HC, CO, NO
x) emission problem, improved the sulfur resistance of catalyst simultaneously, reduced the oxidizing fire temperature of soot.Stainless steel mesh of the present invention is that the soot trapping catalyst pressure drop of carrier is low, and catalytic performance is good, and is not easy to cause poisoning.
Feature of the present invention is: 1. this process using configuration electroplate liquid is implemented electroplating processes to stainless steel mesh, realize the plating load of whole coating material by layering, the plating that distributes, active constituent loading homogeneous, dispersiveness are higher, have realized the performance that meets catalyst; 2. stainless steel mesh, through bluing liquid processing, forms dense oxidation film, has improved the corrosion resistance of carrier; 3. the configuration of Titanium Electroplating liquid and plating, has realized the monolayer distribution of titanium in carrier, has improved the capable energy of anti-sulphur of catalyst in environment for use; 4. adopt and press ripple, shear, roll, the metal working process such as encapsulation, soldering, a kind of special carrier pore passage structure is provided, reduced pressure at expulsion loss; 5. rational coated designs scheme, makes catalyst have plyability.The soot trapping catalyst treatment application 2.3L diesel engine vent gas cleaning test that the present invention obtains shows, gas reaction temperature still keeps carbon soot particles to have more than 90% transformation efficiency at 180～420 DEG C, more than 80% transformation efficiency of nitrogen oxide, carbon monoxide and hydrocarbon have more than 90% transformation efficiency, reduce the oxidizing fire temperature of soot particle simultaneously, solved diesel engine because of the too low technical barrier that cannot administer soot of delivery temperature.
Electrodeposition-type soot trapping catalyst taking stainless steel mesh as carrier is a kind of novel composite catalyst, can comprehensive regulation particulate matter (PM) and gaseous contaminant (HC, CO, NO
x) discharge, especially adopt the load of electroplating load process mode and realize active component, make active component load in screen cloth in high degree of dispersion, avoid the plug-hole of screen cloth micropore, reduce exhaust back pressure, improved the purification efficiency of various pollutants; By the promotor action of auxiliary agent plating solution, improve the sulfur resistance of catalyst, easily solve the severe discharge producing because of fuel qualities difference.There is higher pollutant removing rate, preferably sulfur resistance, longer service life.The present invention also reduces the ignition temperature of soot, by active component to NO
xproduce and decompose O
2, under the promotor action of coating activity, impel carbon soot particles and O
2carry out at a lower temperature oxidizing fire, solved diesel exhaust gas temperature too low and cannot high efficiency carry out the difficult problem of rear waste gas pollution control and treatment.
Detailed description of the invention
Raw material used in the following example is commercially available prod.
Embodiment 1 prepares bluing liquid
Be that 5:15:5:5:1 mixes by natrium nitrosum, sodium nitrate, NaOH, sodium carbonate, waterglass according to mass ratio, then add water, the content of water accounts for 90% of last bluing liquid weight.
Embodiment 2 prepares bluing liquid
Be that 3:10:3:8:2 mixes by natrium nitrosum, sodium nitrate, NaOH, sodium carbonate, waterglass according to mass ratio, then add water, the content of water accounts for 85% of last bluing liquid weight.
Embodiment 3 prepares stainless steel sift mesh catalyst according to the following step successively
1. adopt the bluing liquid of embodiment 1;
2. selecting aperture is that 0.2mm, chemical composition are the stainless steel mesh of aluminium 6%, chromium 20% and iron 84%, and screen cloth string diameter is 0.1mm;
3. process stainless steel mesh with bluing liquid: stainless steel mesh is placed in to bluing liquid heating and boils 15 minutes, heating-up temperature is 90 DEG C;
4. preparation earth solution: Ce
2 (sO
4)
3and H
2o
2mix according to the ratio of 20:1, then add water, the mass concentration of last earth solution is 30%;
5. preparation titanium liquid: titanium sulfate, nickelous sulfate, nickel chloride, boric acid, lauryl sodium sulfate and asccharin are that 76:7:7:3:5:2 is mixed to get titanium liquid according to mass ratio;
6. preparation precious metal solution: the nitrate of palladium, platinum is mixed according to the ratio of simple substance palladium, platinum mass ratio 13:5,
7. pair stainless steel mesh is electroplated: successively stainless steel mesh is carried out plating, the plating of titanium liquid and the plating of precious metal solution of earth solution:
The electroplating parameter of earth solution is, 80 DEG C of bath temperatures, and electroplating time is 60min, PH=3, baking temperature is 80 DEG C.
Titanium liquid electroplating parameter is as follows, 60 DEG C of bath temperatures, and electroplating time is 30min, PH=3.9.
Precious metal solution electroplating parameter is as follows, and bath temperature is 50 DEG C, and positive plate is platinum plate, and anode and cathode current density is 1.5 amperes every square decimeter, and electroplating time is 100s;
8. then stainless steel mesh is pressed ripple, cut into strip, crest height is 1～2mm, and the width of strip screen cloth is 100mm, and sinusoidal waveform duct angle in strip screen cloth is 45 DEG C; Then roll, moulding obtains cylindric half pass-through type honeycomb, and the packaging density of screen cloth is 900g/l;
9. rolled stainless steel mesh is inserted to (diameter is 118.4mm) in stainless steel tube and encapsulate soldering, stainless steel tube used is corrosion resistant stainless steel tube, wherein Cr content >=18% in stainless steel, Ni content >=12%, Mo content >=2.5%.
The electrodeposition-type soot trapping catalyst taking stainless steel mesh as carrier making according to the method described above, the soot preparing trapping catalyst prod is of a size of Φ 150mm × 200mm, and hole density is 46 holes/cm
2, crest height is 1.7mm.The contained active component of soot trapping catalyst is palladium, platinum, and palladium, platinum mass ratio are 1.50%, 0.50%.
Embodiment 4 prepares stainless steel sift mesh catalyst according to the following step successively
1. adopt the bluing liquid of embodiment 2;
2. selecting aperture is that 0.25mm, chemical composition are the stainless steel mesh of aluminium 6%, chromium 20% and iron 84%, and screen cloth string diameter is 0.1mm;
3. process stainless steel mesh with bluing liquid: stainless steel mesh is placed in to bluing liquid heating and boils 20 minutes, heating-up temperature is 80 DEG C;
4. preparation earth solution: Ce
2(SO
4)
3and H
2o
2mix according to the ratio of 20:1, then add water, the mass concentration of last earth solution is 25%;
5. preparation titanium liquid: titanium sulfate, nickelous sulfate, nickel chloride, boric acid, lauryl sodium sulfate and asccharin are that 76:7:7:3:5:2 is mixed to get titanium liquid according to mass ratio;
Preparation precious metal solution: by the nitrate of palladium, platinum according to mass ratio 13:5,
7. pair stainless steel mesh is electroplated: successively stainless steel mesh is carried out plating, the plating of titanium liquid and the plating of precious metal solution of earth solution:
The electroplating parameter of earth solution is, 70 DEG C of bath temperatures, and electroplating time is 60min, PH=3, baking temperature is 80 DEG C.
Titanium liquid electroplating parameter is as follows, 50 DEG C of bath temperatures, and electroplating time is 30min, PH=3.9.
Precious metal solution electroplating parameter is as follows, and bath temperature is 60 DEG C, and positive plate is platinum plate, and anode and cathode current density is 1.5 amperes every square decimeter, and electroplating time is 100s;
8. then stainless steel mesh is pressed ripple, cut into strip, crest height is 1～5mm, and the width of strip screen cloth is 150mm, and sinusoidal waveform duct angle in strip screen cloth is 60 DEG C; Then roll, moulding obtains cylindric half pass-through type honeycomb, and the packaging density of screen cloth is 900g/l;
9. rolled stainless steel mesh is inserted to (diameter is 118.4mm) in stainless steel tube and encapsulate soldering, stainless steel tube used is corrosion resistant stainless steel tube, wherein Cr content >=18% in stainless steel, Ni content >=12%, Mo content >=2.5%.
The electrodeposition-type soot trapping catalyst taking stainless steel mesh as carrier making according to the method described above, the soot preparing trapping catalyst prod is of a size of Φ 150mm × 200mm, and hole density is 46 holes/cm
2, crest height is 1.7mm.The contained active component of soot trapping catalyst is palladium, platinum, and palladium, platinum mass ratio are 1.50%, 0.50%.
Embodiment 5 catalytic effects are measured
Catalyst activity evaluation adopts rail 2.3L diesel engine altogether to carry out the detection of car load emission testing, and test specification is according to regulation IV stage requirement in " light-duty vehicle pollutant emission limit and measuring method (Chinese III, IV stage) ".
The catalyst of embodiment 3 and embodiment 4 is installed and complete vehicle test, fresh state and aging state emission result are respectively in table 1, table 2 and table 3, adopt SUV real vehicle, its fuel system is for being total to rail 2.3L diesel engine, and durable 80000km is undertaken by car load degradation condition.Remarks: (aging condition: regulation IV stage life requirement in " light-duty vehicle pollutant emission limit and measuring method (Chinese III, IV stage) ".）
Testing result shows:
Gas reaction temperature all keeps PM to have more than 90% transformation efficiency at 180 and 420 DEG C, more than 80% transformation efficiency of nitrogen oxide, and carbon monoxide and hydrocarbon have more than 90% transformation efficiency, have reduced the oxidizing fire temperature of soot particle simultaneously.The result of real train test is PM to be had to 88% conversion ratio, nitrogen oxide is had to 77.4% conversion ratio, and carbon monoxide and hydrocarbon are had to more than 85% conversion ratio.By embodiment is found, sinusoidal waveform duct angle in strip screen cloth is that the purification efficiency of 45 DEG C is the purification efficiency of 60 DEG C higher than angle simultaneously.
The fresh state testing result of table 1 (catalytic bed temperature is 180 DEG C)
The fresh state testing result of table 2 (catalytic bed temperature is 420 DEG C)
The durable state testing result of table 3 real vehicle 80000km
Claims (4)
1. for a catalyst carrier for diesel engine vent gas soot trapping catalysis, it is characterized in that this catalyst carrier is stainless steel strip screen cloth, the aperture of screen cloth is 0.15-0.28mm; The crest height of strip screen cloth is 1～5mm, and width is 100～200mm, and sinusoidal waveform duct angle in strip screen cloth is 10～80 degree.
2. the catalyst carrier for diesel engine vent gas soot trapping catalysis according to claim 1, is characterized in that further strip screen cloth being rolled, and moulding obtains cylindric half pass-through type honeycomb, and the packaging density of screen cloth is 800～1500g/l.
3. the catalyst carrier for diesel engine vent gas soot trapping catalysis according to claim 1, is characterized in that the chemical composition of stainless steel strip screen cloth is: aluminium 6%, chromium 20%, iron 84%.
4. prepare the method for claim 1-3 any one for the catalyst carrier of diesel engine vent gas soot trapping catalysis, it is characterized in that this stainless strip steel screen cloth is by pressing ripple in ripple punch, then cuts into strip and obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210546839.6A CN103861656A (en) | 2012-12-14 | 2012-12-14 | Carrier of catalyst used for catalyzing soot capturing in diesel engine exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210546839.6A CN103861656A (en) | 2012-12-14 | 2012-12-14 | Carrier of catalyst used for catalyzing soot capturing in diesel engine exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103861656A true CN103861656A (en) | 2014-06-18 |
Family
ID=50901019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210546839.6A Pending CN103861656A (en) | 2012-12-14 | 2012-12-14 | Carrier of catalyst used for catalyzing soot capturing in diesel engine exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103861656A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707495A (en) * | 2018-12-19 | 2019-05-03 | 浙江大学 | Diesel engine vent gas after-treatment system and processing method based on high chromium-stainless steel |
| CN115487824A (en) * | 2022-08-18 | 2022-12-20 | 无锡双翼汽车环保科技有限公司 | Tail gas purification device of mining explosion-proof diesel engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261409A (en) * | 1997-06-27 | 2000-07-26 | 桑德维克公司 | Ferritic stainless steel alloy and its use as a substrate for catalytic converters |
| CN101274292A (en) * | 2008-05-09 | 2008-10-01 | 大连理工大学 | Honeycomb shaped wire mesh carrier for purifying exhaust air |
| CN202506394U (en) * | 2011-10-26 | 2012-10-31 | 台州欧信环保净化器有限公司 | Sine wave type metal honeycomb carrier of catalyst for purifying tail gas of motor vehicle |
| CN102822369A (en) * | 2010-03-30 | 2012-12-12 | 杰富意钢铁株式会社 | Stainless steel foil and catalyst carrier for exhaust gas purification device using the foil |
-
2012
- 2012-12-14 CN CN201210546839.6A patent/CN103861656A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261409A (en) * | 1997-06-27 | 2000-07-26 | 桑德维克公司 | Ferritic stainless steel alloy and its use as a substrate for catalytic converters |
| CN101274292A (en) * | 2008-05-09 | 2008-10-01 | 大连理工大学 | Honeycomb shaped wire mesh carrier for purifying exhaust air |
| CN102822369A (en) * | 2010-03-30 | 2012-12-12 | 杰富意钢铁株式会社 | Stainless steel foil and catalyst carrier for exhaust gas purification device using the foil |
| CN202506394U (en) * | 2011-10-26 | 2012-10-31 | 台州欧信环保净化器有限公司 | Sine wave type metal honeycomb carrier of catalyst for purifying tail gas of motor vehicle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707495A (en) * | 2018-12-19 | 2019-05-03 | 浙江大学 | Diesel engine vent gas after-treatment system and processing method based on high chromium-stainless steel |
| CN115487824A (en) * | 2022-08-18 | 2022-12-20 | 无锡双翼汽车环保科技有限公司 | Tail gas purification device of mining explosion-proof diesel engine |
| CN115487824B (en) * | 2022-08-18 | 2023-10-13 | 无锡双翼汽车环保科技有限公司 | Tail gas purifying device of mining explosion-proof diesel engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102941088B (en) | Catalyst for concurrently removing CO, CH, NOx and PM, and preparation method thereof | |
| KR100871898B1 (en) | Exhaust gas purifying device for diesel engine | |
| CN102026707B (en) | Exhaust gas purifying catalyst and manufacturing method of same | |
| CN102489322B (en) | Catalyst for purifying tail gas of diesel automobiles, preparation method and purification device thereof | |
| EP1818097A1 (en) | Catalytic material, production method therefor, and diesel particulate filter | |
| CA2903181C (en) | Urea hydrolysis reactor for selective catalytic reduction | |
| CN108816246B (en) | High-dispersion anti-sintering diesel vehicle ASC catalyst and preparation method thereof | |
| CN103801288B (en) | For the composite oxide catalysts and preparation method thereof of oxidation of nitric oxide | |
| WO2009094891A1 (en) | A cu-ce-al catalyst for removing soot particles and nox simultaneously and its preparation method | |
| CN103861612A (en) | Catalyst used for diesel engine tail gas soot collection catalysis | |
| CN109590014A (en) | A kind of integral diesel tail gas oxidation catalyst and preparation method thereof | |
| CN108479788B (en) | Non-noble metal supported catalyst and preparation method and application thereof | |
| WO2023020495A1 (en) | Monolithic cdpf composite material for diesel vehicle and preparation method therefor | |
| CN102909024B (en) | Two-step three-effect non-noble metal catalyst for purification of automobile exhaust | |
| CN105797706A (en) | Cerium-lanthanum solid solution catalyst for purifying diesel vehicle exhaust particles and preparation method thereof | |
| CN103861664B (en) | A kind of diesel engine vent gas oxidation catalyst | |
| CN103861615B (en) | A kind of Catalysts and its preparation method for purifying vehicle exhaust | |
| CN103861656A (en) | Carrier of catalyst used for catalyzing soot capturing in diesel engine exhaust gas | |
| CN113559850A (en) | Manganese-based composite oxide catalyst and preparation method and application thereof | |
| CN1139428C (en) | Purifying catalyst for diesel engine exhaust gas and its preparing method | |
| CN103866313A (en) | Bluing liquid | |
| CN112844394A (en) | CuO-CeO2Preparation method of supported catalyst and application of supported catalyst in tail gas NOxAnd application in anaerobic elimination of CO | |
| CN1915489B (en) | Ternary Nano catalyst in use for cellular carrier of full metal, preparation method and coating process | |
| JPH0616853B2 (en) | Non-precious metal combustion catalyst and method for producing the same | |
| JPH11169668A (en) | Exhaust gas cleaning device and its production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20180713 |
|
| AD01 | Patent right deemed abandoned |