CN109395757A - A kind of catalyst and preparation method thereof reducing dpf regeneration temperature - Google Patents
A kind of catalyst and preparation method thereof reducing dpf regeneration temperature Download PDFInfo
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- CN109395757A CN109395757A CN201811338279.9A CN201811338279A CN109395757A CN 109395757 A CN109395757 A CN 109395757A CN 201811338279 A CN201811338279 A CN 201811338279A CN 109395757 A CN109395757 A CN 109395757A
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- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/20—Carbon compounds
- B01J27/22—Carbides
- B01J27/224—Silicon carbide
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- 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
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- 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
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
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- 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
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- 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
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/656—Manganese, technetium or rhenium
- B01J23/6562—Manganese
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0228—Coating in several steps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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Abstract
The present invention relates to a kind of catalyst and preparation method thereof for reducing dpf regeneration temperature, belong to catalyst preparation technical field.Catalyst of the invention includes the applying coating on carrier and carrier, load has noble metal in coating, the coated weight of coating is 5 ~ 20g/L, the coated weight of noble metal is 0.1 ~ 1.1g/L, when coating, non precious metal slurries are made in gama-alumina, Ce, Zr, Mg, Mn, La, Ti and its one or more of oxide or composite oxides；Precious metals pt, Pd are added in non precious metal slurries and is made noble metal slurries, and when coating is primary from the outlet side DPF to the coating of air inlet extreme direction, after drying, carries out second to outlet side from the inlet end of DPF and coats.The feature that catalyst of the invention has material simple, easily operated, the DPF being prepared have lower regeneration temperature, extend its service life.
Description
Technical field
The present invention relates to a kind of catalyst and preparation method thereof for reducing dpf regeneration temperature, belong to catalyst preparation technology
Field.
Background technique
Diesel engine has many advantages, such as that the thermal efficiency is high, power bracket is wide, is the non-of representative in road vehicle and ship machine, generator
The various aspects such as road machine are using extremely wide.However the diameter of particle of its discharge is smaller, wherein the numbers of particles of 5~50nm
Account for 90% or more, it is light-weight, it can be suspended in atmosphere, and usually adhere to carcinogen, human health be generated very big for a long time
Harm.With the increasingly serious of Environmental Protection Situation, particle (PM) emission problem of diesel engine has caused the enough attention of people, diesel oil
Effective control of machine particle has become the project of of crucial importance and great challenge during current diesel engine development.At present
Implementation Exhaust emission regulation the 5th stage and the 6th stage that will implement from now on, increasingly to the limit value of PM discharge
Strictly, and to granule number (PN) also it is made that specific regulation.
Diesel engines at present wall flow type particle trap (DPF) and its system have become diesel engine discharged particle removal
Conventional means, be component part indispensable in exhaust gas from diesel vehicle system for handling.DPF would generally be placed in oxidative diesel and urge
The agent downstream (DOC) uses.DPF carrier medium is varied, puts into practical application at present, and more mature material mainly has violet
Green stone, silicon carbide (SiC) and aluminium titanates (AT).By its distinctive wall-flow type structure, PM and air-flow in diesel engine vent gas are realized
Separation and PM trapping, when DPF trapping exhaust gas from diesel vehicle particle to a certain extent when, it is necessary to by initiative regeneration by particle height
Temperature is disposed, and carbon deposition quantity is larger and when capacity is smaller inside the DPF, and the big calorimetric that when granules regeneration releases cannot be timely
Situations such as discharge, scorification, cracking will occur for carrier, therefore initiative regeneration has certain risk.There are lot of documents report, DPF
After coating, it can be improved reaction rate of the particle in lower temperature, have higher regeneration efficiency at identical temperature,
That is coating by coating, DPF initiative regeneration temperature can be reduced, DPF damage risk is reduced, prolongs its service life.
DPF is needed by complicated fine calibration process, to guarantee that it is operated normally in practical work process.However
In actual conditions, due to the bad environments (for example speed operation is excessive) of vehicle real work, engine upstream combustion position is not
Good, a variety of causes, the initiative regeneration frequency such as the bad steering of driver habit can be higher, and in terms of coating, we by pair
Continuing to optimize for coating is improved with coating processes, further decreases the risk of DPF ablation.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of reduction DPF
Catalyst of regeneration temperature and preparation method thereof.The coating of coating method coating through the invention can be captured in DPF
On Diesel exhaust particles extracts distribution more disperse, to avoid its concentration light caused by high temperature give DPF bring destroy, from
And effectively extend the service life of DPF.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of catalyst reducing dpf regeneration temperature
And preparation method thereof, which is characterized in that the catalyst coat and its coating method have the feature that
A kind of catalyst reducing dpf regeneration temperature, including the coating coated on carrier and carrier, the coating load
There is noble metal, the coated weight of coating is 5~20g/L, and the coated weight of noble metal is 0.1~1.1g/L.
The noble metal is the mixture of one of Pt, Pd or both, while containing there are two types of when noble metal, precious metals pt
Mass ratio with precious metals pd is 1:1~15:1.
The coating includes one of gama-alumina, Ce, Zr, Mg, Mn, La, Ti, two or more oxidation
Object or composite oxides.
The mass ratio of the gama-alumina and other oxides or composite oxides is 2:1~10:1.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, includes the following steps:
(1) preparation of coating slurry: weighing one of gama-alumina and Ce, Zr, Mg, Mn, La, Ti respectively, and two
Kind or two or more oxides or its composite oxides mixture, be added deionized water be configured to aqueous solution, then according to
Gama-alumina and other oxide mass ratios are that 2:1~10:1 mixes two kinds of prepared aqueous solutions, and is sufficiently stirred
Uniformly；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 5~40 that the granularity of coating slurry, which is adjusted to D90,
μm, obtain non precious metal slurries；
(3) preparation of noble metal slurries: the coated weight according to noble metal is the use that 0.1~1.1g/L calculates noble metal
The mixture of one of Pt, Pd or both is added in non precious metal slurries amount, while containing there are two types of when noble metal, Pt and
The mass ratio of Pd is 1:1~15:1, obtains noble metal slurries；
(4) it coats: being taken out after being impregnated 1~3 minute in the slurries of first time coating for the first time, it then will with compressed air
Extra slurries are blown down inside carrier surface and duct, and blowing down the time is to be subsequently placed in vacuum drying oven within 2 minutes
It is dried 3~6 hours at 120 DEG C；
(5) coat for second: the slurries of the coating at second take out after impregnating 1~3 minute, then will be carried with compressed air
Extra slurries are blown down inside body surface face and duct, and blowing down the time is to be subsequently placed in 120 in vacuum drying oven within 2 minutes
It is dried 3~6 hours at DEG C；
(6) it roasts: roasting 3~6 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
The direction of first time coating be from outlet side to inlet end, the region of coating be carrier lengths 10%~
100%.
The first time coats the slurries that used slurries are noble metal slurries or non precious metal.
The direction of second coating be from inlet end to outlet side, the region of coating be carrier lengths 30%~
100%.
It is noble metal liquid that described second, which coats used slurries,.
Compared with the prior art, the present invention has the following advantages:
Gama-alumina used in the present invention can use its biggish specific surface area dispersion noble metal active component；Contain
Cerium material can provide more gas phases during tail gas vapor phase contaminants and particulate matter as a kind of hydrogen-storing material
Oxygen facilitates particulate matter regeneration；The oxide of zirconium can provide higher mechanical strength not only for coating, and with the shapes such as cerium
At composite oxides can largely promote aluminum oxide coating layer thermal stability promotion；Manganese is as a kind of transition gold
Belong to, the catalytic action having in addition to itself can also effectively improve the catalytic activity of noble metal；Titanyl compound itself compares
It is more stable, in terms of have more outstanding performance；The catalytic capability that lanthanum has carbon monoxide etc. in addition to itself,
Also in coating noble metal dispersion and thermal stability it is helpful.
Material of the invention is simple, easily operated, the DPF being prepared, with regeneration temperature is low, the service life is long, reliability
The features such as high.
The carrier that the present invention can be directed to the Fractions of Diesel Engine Exhaust Particulates of different working condition and its use, designs corresponding painting
Layer slurries, coating method through the invention generate when initiative regeneration so that the distribution of exhaust particulate object more disperses inside DPF
Temperature it is lower.
Detailed description of the invention
Fig. 1 is used experiment condition when regeneration efficiency of the present invention compares.
Fig. 2 is the data summarization that part temperature sensor records in testing of the embodiment of the present invention 2.
Specific embodiment
Technical solution of the present invention is described in further detail below by the drawings and specific embodiments.
Embodiment 1
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier SiC, volume 3.3L, hole density are
300 mesh/square feet；Coating contains gama-alumina, cerium oxide, magnesia, and gama-alumina is mixed with cerium oxide, magnesia
The mass ratio of object is 10:1；The coated weight of coating is 5g/L；Noble metal is platinum, noble metal platinum coated weight 0.1g/L.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) preparation of coating slurry: weighing the mixture 36g of gama-alumina 360g and cerium oxide, magnesia respectively,
Deionized water is added and is configured to aqueous solution, then according to gama-alumina and other oxide masses than the ratio for 10:1 by two
The prepared aqueous solution of kind is mixed, and is sufficiently stirred 3 hours, is then further added auxiliary agent, is adjusted pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 8 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: the non precious metal slurries that a part has prepared are taken out, noble metal platinum will be contained
Solution be added thereto, obtain the noble metal slurries containing noble metal platinum；
(4) it coats: being calculated since SiC carrier outlet side, by the 10% of carrier lengths in non precious metal slurries for the first time
Middle immersion is taken out after 1 minute, and then with compressed air by slurries blowing extra inside carrier surface and duct, the blowing time is
It 1 minute, is subsequently placed in vacuum drying oven at 120 DEG C and dries 3 hours；
(5) it coats for second: being calculated since SiC carrier inlet end, containing noble metal platinum for the 30% of carrier lengths
Noble metal slurries impregnate 1 minute after take out, then slurries extra inside carrier surface and duct are blown down with compressed air,
Blowing down the time is 1 minute, is subsequently placed in vacuum drying oven at 120 DEG C and dries 3 hours；
(6) it roasts: roasting 6 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Embodiment 2
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier SiC, volume 3.3L, hole density are
300 mesh/square feet；Coating contains gama-alumina, cerium zirconium compound oxide, titanium oxide, and gama-alumina and cerium zirconium are compound
Oxide, titania mixture mass ratio be 8:1；The coated weight of coating is 20g/L；Noble metal is platinum and palladium, platinum and palladium
Mass ratio is 1:1, noble-metal coated amount 1.1g/L.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) preparation of coating slurry: weigh respectively gama-alumina 360g and cerium zirconium compound oxide, titanium oxide it is mixed
Object 45g is closed, deionized water is added and is configured to aqueous solution, then according to gama-alumina and other oxide masses than the ratio for 8:1
Example mixes two kinds of prepared aqueous solutions, and is sufficiently stirred 3 hours, then further adds auxiliary agent, adjusts pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 8 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: taking out the non precious metal slurries prepared, containing noble metal platinum and will contain
The solution of precious metal solution palladium is added thereto, and obtains noble metal slurries；
(4) coat for the first time: SiC carrier inlet end is downward, and entire carrier is in the noble metal slurries containing platinum and palladium
It is taken out after impregnating 2 minutes, then with compressed air by slurries blowing extra inside carrier surface and duct, the blowing time is
It 1.5 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 4 hours；
(5) coat for second: SiC carrier outlet side is downward, and entire carrier is in the noble metal slurries containing platinum and palladium
It is taken out after impregnating 2 minutes, then with compressed air by slurries blowing extra inside carrier surface and duct, the blowing time is
It 1.5 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 4 hours；
(6) it roasts: roasting 5 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Embodiment 3
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier AT, volume 3.3L, hole density 300
Mesh/square feet；Coating contains gama-alumina, manganese oxide, and the mass ratio of gama-alumina and manganese oxide is 6:1；Coating
Coated weight is 10g/L；Noble metal is platinum and palladium, and the mass ratio of platinum and palladium is 15:1, noble-metal coated amount 0.3g/L；
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) preparation of coating slurry: weighing gama-alumina 360g and manganese oxide 60g respectively, and deionized water is added and matches
Aqueous solution is made, then according to gama-alumina and other oxide masses than the ratio for 6:1 by two kinds of prepared aqueous solutions
It is mixed, and is sufficiently stirred 3 hours, then further added auxiliary agent, adjust pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 12 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of the slurries containing precious metal palladium: the non precious metal slurries that a part has prepared are taken out, will be contained
The solution of precious metal palladium is added thereto, and obtains the noble metal slurries containing precious metal palladium；
(4) preparation of the slurries containing noble metal platinum: the non precious metal slurries that a part has prepared are taken out, will be contained
The solution of noble metal platinum is added thereto, and obtains the noble metal slurries containing noble metal platinum；
(5) it coats for the first time: being calculated since AT carrier outlet side, containing precious metal palladium for the 80% of carrier lengths
It takes out after being impregnated 3 minutes in noble metal slurries, is then blown down slurries extra inside carrier surface and duct with compressed air,
Blowing down the time is 2 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 5 hours；
(6) it coats for second: being calculated since AT carrier inlet end, containing noble metal platinum for the 40% of carrier lengths
It takes out after being impregnated 3 minutes in noble metal slurries, is then blown down slurries extra inside carrier surface and duct with compressed air,
Blowing down the time is 2 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 5 hours；
(7) it roasts: roasting 4 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Embodiment 4
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier AT, volume 3.3L, hole density 300
Mesh/square feet；Coating contains gama-alumina, titanium oxide, and gama-alumina and other oxide mass ratios are 4:1；Coating
Coated weight be 15g/L；Noble metal is platinum and palladium, and the mass ratio of platinum and palladium is 12:1, noble-metal coated amount 0.5g/L.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) preparation of coating slurry: weighing gama-alumina 360g and titanium oxide 90g respectively, and deionized water is added and matches
Aqueous solution is made, then according to gama-alumina and other oxide masses than the ratio for 4:1 by two kinds of prepared aqueous solutions
It is mixed, and is sufficiently stirred 3 hours, then further added auxiliary agent, adjust pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 12 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: the non precious metal slurries that a part has prepared are taken out, noble metal platinum will be contained
It is added thereto with the solution of palladium, obtains noble metal slurries；
(4) it coats: being calculated since AT carrier outlet side, by the 70% of carrier lengths in non precious metal slurries for the first time
It takes out, is then blown down slurries extra inside carrier surface and duct with compressed air, blowing down the time is 1 after impregnating 1 minute
Minute, it is subsequently placed in vacuum drying oven at 120 DEG C and dries 6 hours；
(5) second coat: being calculated since AT carrier inlet end, by the 70% of carrier lengths containing noble metal platinum and
It is taken out after being impregnated 1 minute in the noble metal slurries of palladium, then slurries with compressed air that carrier surface and duct inside is extra
It blows down, blowing down the time is 1 minute, is subsequently placed in vacuum drying oven at 120 DEG C and dries 6 hours；
(6) it roasts: roasting 3 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Embodiment 5
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier SiC, volume 2.88L, hole density are
300 mesh/square feet；Coating contains gama-alumina, lanthana, and the mass ratio of gama-alumina and lanthana is 2:1；Coating
Coated weight be 20g/L；Noble metal is platinum and palladium, and the mass ratio of platinum and palladium is 10:1, noble-metal coated amount 0.7g/L.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) preparation of coating slurry: weighing gama-alumina 360g and lanthana 180g respectively, and deionized water is added and matches
Aqueous solution is made, then according to gama-alumina and other oxide masses than the ratio for 2:1 by two kinds of prepared aqueous solutions
It is mixed, and is sufficiently stirred 3 hours, then further added auxiliary agent, adjust pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 8 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: the non precious metal slurries that a part has prepared are taken out, noble metal platinum will be contained
It is added thereto with the solution of palladium, obtains noble metal slurries；
(4) it coats: being calculated since SiC carrier outlet side, by the 50% of carrier lengths in non precious metal slurries for the first time
Middle immersion is taken out after 2 minutes, and then with compressed air by slurries blowing extra inside carrier surface and duct, the blowing time is
It 1.5 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 3 hours；
(5) it coats for second: being calculated since SiC carrier inlet end, containing noble metal platinum for the 50% of carrier lengths
With impregnated 2 minutes in the noble metal slurries of palladium after take out, then with compressed air by slurry extra inside carrier surface and duct
Liquid is blown down, and blowing down the time is 1.5 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and is dried 3 hours；
(6) it roasts: roasting 6 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Embodiment 6
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier SiC, volume 2.88L, hole density are
300 mesh/square feet；Coating contains gama-alumina, cerium oxide, titanium oxide, and gama-alumina is mixed with cerium oxide, titanium oxide
The mass ratio of object is 10:1；The coated weight of coating is 15g/L；Noble metal is platinum, noble-metal coated amount 0.9g/L.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) preparation of coating slurry: weighing the mixture 36g of gama-alumina 360g and cerium oxide, titanium oxide respectively,
Deionized water is added and is configured to aqueous solution, then according to gama-alumina and other oxide masses than the ratio for 10:1 by two
The prepared aqueous solution of kind is mixed, and is sufficiently stirred 3 hours, is then further added auxiliary agent, is adjusted pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 8 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: the non precious metal slurries that a part has prepared are taken out, noble metal platinum will be contained
Solution be added thereto, obtain noble metal slurries；
(4) it coats: being calculated since SiC carrier outlet side for the first time, containing noble metal platinum for the 40% of carrier lengths
Noble metal slurries in impregnate 3 minutes after take out, then slurries extra inside carrier surface and duct are blown with compressed air
It removes, blowing down the time is 2 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 4 hours；
(5) it coats for second: being calculated since SiC carrier inlet end, containing noble metal platinum for the 80% of carrier lengths
Noble metal slurries in impregnate 3 minutes after take out, then slurries extra inside carrier surface and duct are blown with compressed air
It removes, blowing down the time is 2 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 4 hours；
(6) it roasts: roasting 5 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Embodiment 7
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier AT, volume 2.88L, hole density are
300 mesh/square feet；Coating contains gama-alumina, cerium zirconium compound oxide, and gama-alumina and cerium zirconium compound oxide
Mass ratio is 8:1；The coated weight of coating is 10g/L；Noble metal is platinum and palladium, and the mass ratio of platinum and palladium is 8:1, noble-metal coated
Measure 1.1g/L.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) it the preparation of coating slurry: weighs gama-alumina 360g respectively and cerium zirconium compound oxide 45g, addition is gone
Ionized water is configured to aqueous solution, then prepares two kinds than the ratio for 8:1 according to gama-alumina and other oxide masses
Aqueous solution mixed, and be sufficiently stirred 3 hours, then further addition auxiliary agent, adjust pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 12 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: the non precious metal slurries that a part has prepared are taken out, noble metal platinum will be contained
It is added thereto with the solution of palladium, obtains noble metal slurries；
(4) it coats for the first time: AT carrier inlet end is downward, after entire carrier impregnates 1 minute in non precious metal slurries
It takes out, is then blown down slurries extra inside carrier surface and duct with compressed air, blowing down the time is 1 minute, is then set
It is dried 5 hours at 120 DEG C in vacuum drying oven；
(5) coat for second: AT carrier outlet side is downward, and entire carrier is starched in the noble metal containing noble metal platinum and palladium
It is taken out after being impregnated 1 minute in liquid, then slurries extra inside carrier surface and duct is blown down with compressed air, blow down the time
It is 1 minute, is subsequently placed in vacuum drying oven at 120 DEG C and dries 5 hours；
(6) it roasts: roasting 4 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Embodiment 8
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier AT, volume 2.88L, hole density are
300 mesh/square feet；Coating contains gama-alumina, cerium zirconium compound oxide, titanium oxide, and gama-alumina and cerium zirconium are compound
Oxide, titania mixture mass ratio be 6:1；The coated weight of coating is 5g/L；Noble metal is platinum and palladium, the matter of platinum and palladium
Amount is than being 5:1, noble-metal coated amount 0.1g/L.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) preparation of coating slurry: weigh respectively gama-alumina 360g and cerium zirconium compound oxide, titanium oxide it is mixed
Object 60g is closed, deionized water is added and is configured to aqueous solution, then according to gama-alumina and other oxide masses than the ratio for 6:1
Example mixes two kinds of prepared aqueous solutions, and is sufficiently stirred 3 hours, then further adds auxiliary agent, adjusts pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 12 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: the non precious metal slurries that a part has prepared are taken out, noble metal platinum will be contained
It is added thereto with the solution of palladium, obtains noble metal slurries；
(4) coat: being calculated since AT carrier outlet side for the first time, by the 90% of carrier lengths containing noble metal platinum and
It is taken out after being impregnated 2 minutes in the noble metal slurries of palladium, then slurries with compressed air that carrier surface and duct inside is extra
It blows down, blowing down the time is 1.5 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 6 hours；
(5) second coat: being calculated since AT carrier inlet end, by the 40% of carrier lengths containing noble metal platinum and
It is taken out after being impregnated 2 minutes in the noble metal slurries of palladium, then slurries with compressed air that carrier surface and duct inside is extra
It blows down, blowing down the time is 1.5 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 6 hours；
(6) it roasts: roasting 3 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Embodiment 9
A kind of catalyst with reduction dpf regeneration temperature, catalyst carrier is cordierite, volume 8.2L, hole density
For 200 mesh/square feet；Coating contains gama-alumina, cerium oxide, magnesia, titanium oxide, and gama-alumina and cerium oxide,
Magnesia, titania mixture mass ratio be 4:1；The coated weight of coating is 15g/L；Noble metal is platinum and palladium, platinum and palladium
Mass ratio is 3:1, noble-metal coated amount 0.5g/L.
A kind of preparation method for the catalyst reducing dpf regeneration temperature, comprising the following steps:
(1) preparation of coating slurry: weigh respectively gama-alumina 360g and cerium oxide, magnesia, titanium oxide it is mixed
Object 90g is closed, deionized water is added and is configured to aqueous solution, then according to gama-alumina and other oxide masses than the ratio for 4:1
Example mixes two kinds of prepared aqueous solutions, and is sufficiently stirred 3 hours, then further adds auxiliary agent, adjusts pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 15 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of the slurries containing precious metal palladium: the non precious metal slurries that a part has prepared are taken out, will be contained
The solution of precious metal palladium is added thereto, and obtains the noble metal slurries containing precious metal palladium；
(4) preparation of the slurries containing noble metal platinum: the non precious metal slurries that a part has prepared are taken out, will be contained
The solution of noble metal platinum is added thereto, and obtains the noble metal slurries containing noble metal platinum；
(5) it coats for the first time: being calculated since cordierite carrier outlet side, containing noble metal for the 70% of carrier lengths
It is taken out after being impregnated 3 minutes in the noble metal slurries of palladium, then slurries with compressed air that carrier surface and duct inside is extra
It blows down, blowing down the time is 2 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 4 hours；
(6) it coats for second: being calculated since cordierite carrier inlet end, containing noble metal for the 70% of carrier lengths
It is taken out after being impregnated 3 minutes in the noble metal slurries of platinum, then slurries with compressed air that carrier surface and duct inside is extra
It blows down, blowing down the time is 2 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 4 hours；
(7) it roasts: roasting 3 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Comparative example 1
Using coating method used in previous embodiment 6, and coating of the present invention is not used.Catalyst carrier
For SiC, volume 2.88L, hole density is 300 mesh/square feet；Coating only contains gama-alumina, and the coated weight of coating is
15g/L；Noble metal is platinum, noble-metal coated amount 0.9g/L.
Preparation method includes the following steps:
(1) preparation of coating slurry: weighing gama-alumina 360g, and deionized water is added and is configured to aqueous solution, and sufficiently stirs
It mixes 3 hours, then further adds auxiliary agent, adjust pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 8 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: the non precious metal slurries that a part has prepared are taken out, noble metal platinum will be contained
Solution be added thereto, obtain noble metal slurries；
(4) it coats: being calculated since SiC carrier outlet side for the first time, containing noble metal platinum for the 40% of carrier lengths
Noble metal slurries in impregnate 3 minutes after take out, then slurries extra inside carrier surface and duct are blown with compressed air
It removes, blowing down the time is 2 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 4 hours；
(5) it coats for second: being calculated since SiC carrier inlet end, containing noble metal platinum for the 80% of carrier lengths
Noble metal slurries in impregnate 3 minutes after take out, then slurries extra inside carrier surface and duct are blown with compressed air
It removes, blowing down the time is 2 minutes, is subsequently placed in vacuum drying oven at 120 DEG C and dries 4 hours；
(6) it roasts: roasting 5 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
Comparative example 2
Using coating used in previous embodiment 7, and coating method of the present invention is not used.Catalyst carrier
For AT, volume 2.88L, hole density is 300 mesh/square feet；Coating contains gama-alumina, cerium zirconium compound oxide, and
The mass ratio of gama-alumina and cerium zirconium compound oxide is 8:1；The coated weight of coating is 10g/L；Noble metal is platinum and palladium, platinum
Mass ratio with palladium is 8:1, noble-metal coated amount 1.1g/L.
Preparation method includes the following steps:
(1) it the preparation of coating slurry: weighs gama-alumina 360g respectively and cerium zirconium compound oxide 45g, addition is gone
Ionized water is configured to aqueous solution, then prepares two kinds than the ratio for 8:1 according to gama-alumina and other oxide masses
Aqueous solution mixed, and be sufficiently stirred 3 hours, then further addition auxiliary agent, adjust pH value；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 12 μm that the granularity of coating slurry, which is adjusted to D90,
Obtain non precious metal slurries；
(3) preparation of noble metal slurries: the non precious metal slurries that a part has prepared are taken out, noble metal platinum will be contained
It is added thereto with the solution of palladium, obtains noble metal slurries；
(4) coat: AT carrier inlet end is downward, and entire carrier soaks in the noble metal slurries containing noble metal platinum and palladium
Bubble takes out after 1 minute, is then blown down slurries extra inside carrier surface and duct with compressed air, blowing down the time is 1 point
Clock is subsequently placed in vacuum drying oven at 120 DEG C and dries 5 hours；
(6) it roasts: roasting 4 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
The comparison of regeneration efficiency: the catalyst prepared to Examples 1 to 9 and comparative example 1~2 carries out carbon deposit regeneration efficiency
Compare test, the catalyst sample being prepared is carried out to the comparison of carbon deposit regeneration efficiency under same engine, the same terms
Test, the specific steps are as follows:
Carry carbon: load carbon amounts is 6.5g/L.The volume that carrier is used according to each embodiment, is calculated the totality of each embodiment
Carbon deposition quantity.
Test: when starting test, constant engine speed perseverance torque is constant in 560 DEG C, 600 respectively by DPF inlet temperature
DEG C, 640 DEG C, respectively keep 20min, experiment condition is as shown in attached drawing 1, and by the preferable embodiment 6 of effect, embodiment 7, comparative example
1 and comparative example 2 in regeneration efficiency result summarize, be shown in Table 1.
Table 1: embodiment 6, embodiment 7, the regeneration efficiency result (%) of comparative example 1 and comparative example 2
| Project | 560℃ | 600℃ | 640℃ |
| Embodiment 6 | 84.7 | 91.7 | 94.3 |
| Embodiment 7 | 84.9 | 92.3 | 95.6 |
| Comparative example 1 | 68.9 | 82.8 | 90.4 |
| Comparative example 2 | 70.6 | 83.4 | 91.2 |
It is only that the difference of coating method of coating between embodiment 7 and comparative example 2, utilizes the present invention as can be seen from Table 1
The catalyst that the coating method is coated, regeneration efficiency when generating in controllable regeneration are apparently higher than comparative example, no
Only in each regeneration, compared to comparative example, what carbon deposit can be removed is more thorough；After multiple regeneration, regenerated frequency
It is secondary also lower, fuel economy can not only be improved, the service life of DPF can also be effectively extended.Embodiment 6 and comparative example 1
Between be only that the difference of coating, the catalyst of coating of the present invention is utilized as can be seen from Table 1, when generating when controllably regenerating
Regeneration efficiency is apparently higher than comparative example, not only in each regeneration, compared to comparative example, carbon deposit can be removed more thorough
Bottom；After multiple regeneration, the regenerated frequency is also lower, can not only improve fuel economy, can also effectively extend DPF's
Service life.
Regeneration temperature is carried out to catalyst prepared by Examples 1 to 9 and comparative example 1~2 and compares test, by what is be prepared
Catalyst sample carries out the comparison test of initiative regeneration temperature under same engine, the same terms.Specific step is as follows:
Carry carbon: load carbon amounts is 6.5g/L, and the volume of carrier is used according to each embodiment, each embodiment can be calculated
Overall carbon deposition quantity.
Mounting temperature sensor: since each embodiment of design is in regeneration, the region that maximum temperature generates is different,
So needing each different location mounting temperature sensor in portion in each embodiments as much as possible.Here, to each implementation
Example is assembled with 15 temperature sensors, be successively named as TH1-TH15, monitors each temperature sensor during the test
Temperature, and the maximum temperature to monitor is as the foundation compared.
Test: when starting test, constant engine speed perseverance torque, DPF inlet temperature is constant at 300 DEG C, is fired by injection
The mode of oil carries out temperature raising, and example inlet end temperature to be performed is warming up to 620 ± 20 DEG C, and 30~90s is kept (to go out according to maximum temperature
Depending on current machine), then stop fuel oil injection, engine is adjusted to idling mode, records the data of each temperature sensor.Summarize
In entire test process, the temperature value that each temperature sensor of embodiment 2 is recorded, choosing wherein has 8 groups for representing meaning,
It is omitted that there are other 7 groups of a large amount of repeated datas, and engine speed in whole experiment process is labeled in secondary axis
On, summarize that its result is as shown in Fig. 2, and the maximum value of the temperature arrived recorded in Examples 1 to 9 and comparative example 1~2 is converged
Always, 2 are shown in Table.
Table 2: the maximum value of each embodiment test temperature
| Project | The maximum temperature measured |
| Embodiment 1 | 948 |
| Embodiment 2 | 985 |
| Embodiment 3 | 959 |
| Embodiment 4 | 954 |
| Embodiment 5 | 946 |
| Embodiment 6 | 971 |
| Embodiment 7 | 976 |
| Embodiment 8 | 968 |
| Embodiment 9 | 963 |
| Comparative example 1 | 1059 |
| Comparative example 2 | 1117 |
As can be seen from Table 2, by embodiment 7 and comparative example 2, the maximum value of 1 test temperature of embodiment 6 and comparative example
Compare, it can be seen that use coating and coating method of the invention, the high temperature generated in non-controllable regeneration is significantly lower than pair
Ratio, thus catalyst coat of the invention and its coating method have the function of reducing dpf regeneration temperature, it is possible to prevente effectively from
In actual use, high temperature caused by carbon distribution concentration is lighted destroys DPF to DPF bring.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way.It is all according to the present invention
Essence any simple modification, change and equivalence change to the above embodiments, still fall within technical solution of the present invention
In protection scope.
Claims (9)
1. a kind of catalyst for reducing dpf regeneration temperature, including the coating coated on carrier and carrier, which is characterized in that institute
Stating coating load has noble metal, and the coated weight of coating is 5 ~ 20g/L, and the coated weight of noble metal is 0.1 ~ 1.1g/L.
2. a kind of catalyst for reducing dpf regeneration temperature according to claim 1, which is characterized in that the noble metal is
The mixture of one of Pt, Pd or both, while containing there are two types of when noble metal, the mass ratio of precious metals pt and precious metals pd is
1:1~15:1。
3. a kind of catalyst for reducing dpf regeneration temperature according to claim 1, which is characterized in that the coating includes
One of gama-alumina, Ce, Zr, Mg, Mn, La, Ti, two or more oxide or composite oxides.
4. a kind of catalyst for reducing dpf regeneration temperature according to claim 3, which is characterized in that the gama-alumina
It is 2:1 ~ 10:1 with the mass ratio of other oxides or composite oxides.
5. a kind of preparation method of catalyst for reducing dpf regeneration temperature according to claim 1, which is characterized in that packet
Include following steps:
(1) preparation of coating slurry: weigh respectively one of gama-alumina and Ce, Zr, Mg, Mn, La, Ti, two kinds or
The mixture of two or more oxides or its composite oxides is added deionized water and is configured to aqueous solution, then according to γ-oxygen
Change aluminium and other oxide mass ratios are that 2:1 ~ 10:1 mixes two kinds of prepared aqueous solutions, and stirs；
(2) slurries ball milling: handling coating slurry using ball-milling technology, and it is 5 ~ 40 μm that the granularity of coating slurry, which is adjusted to D90, i.e.,
Non precious metal slurries are made；
(3) preparation of noble metal slurries: the coated weight according to noble metal is the usage amount that 0.1 ~ 1.1g/L calculates noble metal, will
The mixture of one of Pt, Pd or both are added in non precious metal slurries, while containing there are two types of when noble metal, the matter of Pt and Pd
Amount obtains noble metal slurries than being 1:1 ~ 15:1；
(4) it coats: being taken out after being impregnated 1 ~ 3 minute in the slurries of first time coating for the first time, then with compressed air by carrier
Extra slurries are blown down inside surface and duct, and blowing down the time is to be subsequently placed in vacuum drying oven 120 DEG C within 2 minutes
Lower drying 3 ~ 6 hours；
(5) it second coats: being taken out after being impregnated 1 ~ 3 minute in the slurries of the coating at second, then with compressed air by carrier
Extra slurries are blown down inside surface and duct, and blowing down the time is to be subsequently placed in vacuum drying oven 120 DEG C within 2 minutes
Lower drying 3 ~ 6 hours；
(6) it roasts: roasting 3 ~ 6 hours at 600 DEG C in Muffle furnace to get DPF catalyst is arrived.
6. a kind of preparation method of catalyst for reducing dpf regeneration temperature according to claim 5, which is characterized in that institute
The direction for stating coating for the first time is from outlet side to inlet end, and the region of coating is the 10% ~ 100% of carrier lengths.
7. a kind of preparation method of catalyst for reducing dpf regeneration temperature according to claim 5, which is characterized in that institute
State the slurries that slurries used in coating for the first time are noble metal slurries or non precious metal.
8. a kind of preparation method of catalyst for reducing dpf regeneration temperature according to claim 5, which is characterized in that institute
The direction for stating second of coating is from inlet end to outlet side, and the region of coating is the 30% ~ 100% of carrier lengths.
9. a kind of preparation method of catalyst for reducing dpf regeneration temperature according to claim 5, which is characterized in that institute
Stating slurries used in second of coating is noble metal liquid.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113181910A (en) * | 2021-04-28 | 2021-07-30 | 无锡威孚环保催化剂有限公司 | High-sulfur tail gas particle trapping catalyst for marine diesel engine and preparation method thereof |
| CN116212866A (en) * | 2023-03-09 | 2023-06-06 | 同济大学 | A kind of high anti-sulfur CDPF catalyst of low-temperature catalytic soot and preparation method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103648607A (en) * | 2011-05-13 | 2014-03-19 | 巴斯夫欧洲公司 | Catalyzed soot filter with layered design |
| CN104190413A (en) * | 2014-08-12 | 2014-12-10 | 无锡威孚力达催化净化器有限责任公司 | SCR-based NO oxidation catalyst and preparation method thereof |
| CN105964253A (en) * | 2016-05-13 | 2016-09-28 | 无锡威孚环保催化剂有限公司 | Gasoline car particle capturing catalyst and preparation method thereof |
| GB2549009B (en) * | 2014-01-23 | 2018-01-10 | Johnson Matthey Plc | Diesel oxidation catalyst and exhaust system |
| CN107715875A (en) * | 2017-11-01 | 2018-02-23 | 台州欧信环保净化器有限公司 | A kind of GPF four-way catalysts and preparation method thereof |
| CN108295851A (en) * | 2018-01-25 | 2018-07-20 | 无锡威孚环保催化剂有限公司 | Gasoline car grain catcher catalyst and preparation method thereof |
| CN108579801A (en) * | 2018-04-27 | 2018-09-28 | 中自环保科技股份有限公司 | A kind of oxidized form catalysis system and preparation method thereof with good low temperature NO oxidabilities |
-
2018
- 2018-11-12 CN CN201811338279.9A patent/CN109395757A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103648607A (en) * | 2011-05-13 | 2014-03-19 | 巴斯夫欧洲公司 | Catalyzed soot filter with layered design |
| GB2549009B (en) * | 2014-01-23 | 2018-01-10 | Johnson Matthey Plc | Diesel oxidation catalyst and exhaust system |
| CN104190413A (en) * | 2014-08-12 | 2014-12-10 | 无锡威孚力达催化净化器有限责任公司 | SCR-based NO oxidation catalyst and preparation method thereof |
| CN105964253A (en) * | 2016-05-13 | 2016-09-28 | 无锡威孚环保催化剂有限公司 | Gasoline car particle capturing catalyst and preparation method thereof |
| CN107715875A (en) * | 2017-11-01 | 2018-02-23 | 台州欧信环保净化器有限公司 | A kind of GPF four-way catalysts and preparation method thereof |
| CN108295851A (en) * | 2018-01-25 | 2018-07-20 | 无锡威孚环保催化剂有限公司 | Gasoline car grain catcher catalyst and preparation method thereof |
| CN108579801A (en) * | 2018-04-27 | 2018-09-28 | 中自环保科技股份有限公司 | A kind of oxidized form catalysis system and preparation method thereof with good low temperature NO oxidabilities |
Non-Patent Citations (2)
| Title |
|---|
| 王加俊: "Pt-Pd/CeO_2-SiO_2氧化催化剂的合成及其性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 鲍晓峰: "《柴油车环保达标监管》", 31 October 2015, 北京：中国环境科学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113181910A (en) * | 2021-04-28 | 2021-07-30 | 无锡威孚环保催化剂有限公司 | High-sulfur tail gas particle trapping catalyst for marine diesel engine and preparation method thereof |
| CN113181910B (en) * | 2021-04-28 | 2024-03-15 | 无锡威孚环保催化剂有限公司 | Marine diesel engine high-sulfur tail gas particle trapping catalyst and preparation method thereof |
| CN116212866A (en) * | 2023-03-09 | 2023-06-06 | 同济大学 | A kind of high anti-sulfur CDPF catalyst of low-temperature catalytic soot and preparation method |
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Application publication date: 20190301 |