CN110075907A - A kind of ammoxidation catalyst and preparation method thereof for diesel car tail gas refining - Google Patents
A kind of ammoxidation catalyst and preparation method thereof for diesel car tail gas refining Download PDFInfo
- Publication number
- CN110075907A CN110075907A CN201910379254.1A CN201910379254A CN110075907A CN 110075907 A CN110075907 A CN 110075907A CN 201910379254 A CN201910379254 A CN 201910379254A CN 110075907 A CN110075907 A CN 110075907A
- Authority
- CN
- China
- Prior art keywords
- molecular sieve
- layer
- powder
- precious metal
- tail gas
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9436—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/064—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing iron group metals, noble metals or copper
- B01J29/072—Iron group metals or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
Abstract
The invention discloses one kind to be used for purifying tail gas of diesel vehicles NH3Leakage has simple process, lower-cost ASC catalyst and preparation method thereof.The present invention prepares ASC catalyst by adjusting the state of bottom and upper slurry, continue to coat upper layer in the case where not roasting after the completion of bottom is coated, by the way that layer of precious metal and molecular sieve layer through improvement of sizing mixing respectively, remove the roasting process after noble-metal coated to carrier from, directly coating upper-class elements sieve, two kinds of slurries are easy coating in coating procedure, and high-speed is purged without obscission.Through active testing, which is ensuring NH3While conversion ratio is constant, product N is improved2Selectivity purifies NH for diesel vehicle after-treatment system3Leakage has important practical significance.
Description
Technical field
The invention belongs to catalyst preparation technical fields, and in particular to ammoxidation catalyst preparation technical field especially relates to
And a kind of ammoxidation catalyst (ASC) and its preparation for diesel car tail gas refining.
Background technique
Using urea as reducing agent Selective Catalytic Reduction of NOx(NH3- SCR) it is current processing exhaust gas from diesel vehicle NOxUsing
Widest technology.In order to meet increasingly strict emission regulation, usual excessive addition urea is to improve low temperature NOxConversion effect
Rate, but excessively high ammonia nitrogen ratio will lead to NH3Leakage.In addition, low-temperature zone is due to NO even if ammonia nitrogen ratio is theoretical valuexWithout complete
It converts and stores NH over a molecular sieve3Also it can increase and be desorbed with temperature, lead to NH3Leakage.And NH3It is a kind of irritant
The toxic gas of smell, affects air quality and human health.State VI (equivalent Europe VI) newly-increased NH3Limit value 10ppm is revealed, because
Ammoxidation catalyst (ASC) is placed in SCR catalyst downstream the NH of leakage by this3It is converted into N2Have become diesel vehicle post-processing system
The standard configuration of system.
One effective ASC catalyst should have efficient NH3Oxidability and product N2Selectivity.Patent application
US20160367975A1 discloses a kind of difunctional ammoxidation catalyst, main to illustrate that how to reduce N2The production quantity of O,
Improve product N2Selectivity is tested from coating structure (such as bilayer, three layers) and distribution problem (layer of precious metal and SCR layers of coating
Distribution proportion), layer of precious metal carrier material, which influences, etc. is verified.But the bottom and upper in the preparation of this double-layer catalyst
Layer coating is required to be roasted respectively after application, and preparation process is complex and energy consumption is high.Therefore, a kind of technique letter is developed
List, cost is relatively low, while the preferable ASC catalyst of performance is a current difficult point for needing actively to make great efforts to capture.
Summary of the invention
Deficiency discloses one kind for purifying tail gas of diesel vehicles NH to the present invention according to prior art3Leakage has technique
Simply, lower-cost ASC catalyst and preparation method thereof.The problem to be solved in the present invention is by adjusting bottom and upper layer slurry
The state of material prepares ASC catalyst, so that continuing to coat upper layer in the case where not roasting after the completion of bottom coating, both can ensure that
Two kinds of coatings are easy coating, also can guarantee that coating is not fallen off under high-speed, while catalyst also has preferable performance.
The invention is realized by the following technical scheme:
Ammoxidation catalyst preparation method for diesel car tail gas refining, it is characterised in that: the catalyst is by successively
Bottom and two coating of upper layer coated on carrier surface are made；The bottom is layer of precious metal, by carrier material and its load
Active component is made, and active component is Pt or/and Pd；The upper layer is the molecular sieve layer for loading active component, active component
It is one or more of Fe, Mn, Ni, Co, Cu；
Preparation step includes:
1. noble-metal-supported: according to the water pore volume of carrier material, by weighed precious metal solution be added it is suitable go from
In above-mentioned carrier material, obtained powder is dried sub- water incipient impregnation in 50~90 DEG C；
2. preparing layer of precious metal powder: by the noble metal powder 1. prepared in air atmosphere, 450-650 DEG C of constant temperature 2-5h
Carry out calcination process；
3. molecular sieve active component loads: the soluble-salt of molecular sieve active component being dissolved in deionized water, and is heated
To 50~90 DEG C, molecular sieve powder is added in 50~90 DEG C of isothermal reaction kettle, then ion exchange 3-10h is filtered, washed
It washs, it is dry；
4. roasting prepares molecular sieve layer powder: by the above-mentioned molecular sieve powder 3. obtained under the conditions of air atmosphere, 450-
650 DEG C of constant temperature 2-5h carry out calcination process；
5. layer of precious metal powder is sized mixing: water and binder is added in the above-mentioned powder 2. obtained, ball milling slurrying adjusts slurry
Solid content 35wt%-50wt%, slurry pH value is less than 7；
6. molecular sieve layer powder is sized mixing: water and binder is added in the above-mentioned powder 4. obtained, ball milling slurrying adjusts slurry
Solid content 35wt%-50wt%, slurry pH value is less than 7；
7. powder coats: will Precious Metal above-mentioned 5. obtained coated on ceramic monolith, be then coated with it is above-mentioned 6.
The molecular sieve slurry of preparation, it is dry；
8. calcination process: the above-mentioned integral catalyzer 7. obtained being roasted in air atmosphere, roasting condition is
450-650 DEG C of constant temperature 2-5h.
Precious metal support material of the present invention is cerium oxide-titanium oxide, aluminium oxide, Ceria-zirconia, silica-
The mixture of one or more of aluminium oxide.
The precious metals pt of the present invention being supported on precious metal support material: the ratio of Pd can be 1:0,1:1,1:2,
2:1 or 0:1, load capacity are 0.05wt%-0.5wt% in terms of precious metal ion.
Molecular sieve of the present invention be include the mixing with one or both of SAPO-34, SSZ-13 of CHA structure
Object.
The active component of load of the present invention over a molecular sieve is Cu；Load capacity is 1.0wt%- with metal ion
4.0wt%.
Step layer of precious metal powder of the present invention 5. selected binder of sizing mixing is one of Aluminum sol, zirconium colloidal sol
Or two kinds of mixture.
The step layer of precious metal powder described further 5. slurry pH that sizes mixing is adjusted to 4-7.
Step molecular sieve layer powder of the present invention 6. selected binder of sizing mixing is one of silica solution, Aluminum sol
Or two kinds of mixture.
The step molecular sieve layer powder described further 6. slurry pH that sizes mixing is adjusted to 4-7.
Compared with prior art, the features of the present invention is as follows:
ASC catalyst prepared by the present invention is sized mixing by layer of precious metal and molecular sieve layer respectively after processing, may be implemented
Layer of precious metal is coated on after carrier without calcination process process, directly coating upper-class elements sieve.Experiment shows: existing catalysis
Agent preparation method not only can simplify technique, save the cost, moreover it is possible to reduce by-product NOxAnd N2The generation of O improves oxidation product
N2Selectivity.
Catalyst prepared by the present invention generates lower NOxAnd N2O, reason may be since layer of precious metal does not roast directly
Connect painting molecular sieve, moieties screening the pulp material infiltrate into layer of precious metal and with its physical mixed, adsorbed on catalyst Pt in this way
NO can migrate to neighbouring SCR and with the NH of ADSORPTION STATE3NH occurs3- SCR reaction, thus NO concentration is reduced, and then NH3、
NO and O2Reaction generates N2A possibility that O, reduces, N2Selectivity improves.
The present invention is by that respectively by improvement of sizing mixing, can remove and arrive in noble-metal coated layer of precious metal and molecular sieve layer from
Roasting this process after carrier, directly coating upper-class elements sieve.And two kinds of slurries are easy coating, high-speed in coating procedure
Purging is without obscission.Through active testing, which is ensuring NH3While conversion ratio is constant, product N is improved2Selection
Property, NH is purified for diesel vehicle after-treatment system3Leakage has important practical significance.
Detailed description of the invention
Fig. 1 is 2 sample NH of embodiment 1, comparative example 1 and comparative example3Conversion performance curve, in figure, ordinate NH3Turn
Rate, unit %；Abscissa is temperature, and unit degree, S1 expression 1 sample of embodiment, B1, B2 indicate comparative example 1,2 sample of comparative example
Product；
Fig. 2 is 2 sample NH of embodiment 1, comparative example 1 and comparative example3Conversion performance curve, in figure, ordinate NOxLife
Cheng Liang, unit %；Abscissa is temperature, and unit degree, S1 expression 1 sample of embodiment, B1, B2 indicate comparative example 1,2 sample of comparative example
Product；
Fig. 3 is 2 sample NH of embodiment 1, comparative example 1 and comparative example3Conversion performance curve, in figure, ordinate N2The life of O
Cheng Liang, unit ppm；Abscissa is temperature, and unit degree, S1 expression 1 sample of embodiment, B1, B2 indicate comparative example 1,2 sample of comparative example
Product；
Fig. 4 is 2 sample NH of embodiment 1, comparative example 1 and comparative example3Conversion performance curve, in figure, ordinate N2Selection
Property, unit %；Abscissa is temperature, and unit degree, S1 expression 1 sample of embodiment, B1, B2 indicate comparative example 1,2 sample of comparative example；
Fig. 5 is 3 sample NH of embodiment 2 and comparative example3Conversion performance curve, in figure, ordinate NH3Conversion ratio, it is single
Position %；Abscissa is temperature, unit degree, S2 expression 2 sample of embodiment, B3 expression 3 sample of comparative example；
Fig. 6 is 3 sample NH of embodiment 2 and comparative example3Conversion performance curve, in figure, ordinate NOxProduction quantity, it is single
Position %；Abscissa is temperature, unit degree, S2 expression 2 sample of embodiment, B3 expression 3 sample of comparative example；
Fig. 7 is 3 sample NH of embodiment 2 and comparative example3Conversion performance curve, in figure, ordinate N2The production quantity of O, unit
ppm；Abscissa is temperature, unit degree, S2 expression 2 sample of embodiment, B3 expression 3 sample of comparative example；
3 sample NH of Fig. 8 embodiment 2 and comparative example3Conversion performance curve, in figure, ordinate N2Selectivity, unit %；
Abscissa is temperature, unit degree, S2 expression 2 sample of embodiment, B3 expression 3 sample of comparative example.
Specific embodiment
The present invention is further described With reference to embodiment, specific embodiment be to the principle of the invention into
One step explanation, does not limit the invention in any way, and same or like technology is protected without departing from the present invention with the present invention
Range.
In conjunction with attached drawing.
The present invention for diesel car tail gas refining ASC catalyst the preparation method is as follows:
1. noble-metal-supported: according to the water pore volume of carrier material, by weighed precious metal solution be added it is suitable go from
In above-mentioned carrier material, obtained powder is dried sub- water incipient impregnation in 50~90 DEG C.
2. roasting prepares layer of precious metal powder: the noble metal powder 1. prepared is carried out 450-650 DEG C in air atmosphere
Constant temperature 2-5h calcination process.
3. molecular sieve active component loads: soluble copper salt or molysite being dissolved in deionized water, and are heated to 50~90
DEG C, molecular sieve powder is added in 50~90 DEG C of isothermal reaction kettle, then ion exchange 3-10h is filtered, washed, dry.
4. roasting prepares molecular sieve layer powder: the above-mentioned molecular sieve powder 3. obtained is carried out under the conditions of air atmosphere
450-650 DEG C of constant temperature 2-5h calcination process.
5. layer of precious metal powder is sized mixing: water and binder is added in the above-mentioned powder 2. obtained, ball milling slurrying adjusts slurry
Solid content about 35%-50%, detection pH value make it be no more than 7.
6. molecular sieve layer powder is sized mixing: water and binder is added in the above-mentioned powder 4. obtained, ball milling slurrying adjusts slurry
Solid content about 35%-50%, detection pH value make it be no more than 7.
7. powder coats: Precious Metal above-mentioned 5. obtained being coated on ceramic monolith, is then directly coated above-mentioned
6. the molecular sieve slurry prepared is dried.
8. calcination process: the above-mentioned integral catalyzer 7. obtained being roasted in air atmosphere, roasting condition is
450-650 DEG C of constant temperature 2-5h.
It is further detailed below with specifically preparing with performance detection.
Embodiment 1
Platinum nitrate solution is impregnated on Ceria-zirconia mixed oxide carrier by infusion process, 600 DEG C of constant temperature 1h
Roasting.7wt% zirconium colloidal sol is added in obtained roasting powder (with ZrO2Calculate), addition deionized water generates about 45wt%'s
Then solid content uses ball mill grinding, adjust pH about 7, obtain layer of precious metal slurry, be denoted as PGM-jl-1, spare.
Ferric nitrate precursor solution is loaded on molecular sieve by ion-exchange, slurries obtained are filtered, wash
It washs, 550 DEG C of constant temperature 3h roastings.Then 4wt% Aluminum sol will be added (with Al in roasting powder2O3Calculate), deionized water is added,
Solid content about 40wt% is adjusted, ball mill grinding is then used, pH about 5 is monitored, obtains molecular sieve layer slurry, be denoted as Zeolite-
Jl-1, it is spare.
By above-mentioned Precious Metal PGM-jl-1 be coated to having a size of " 1in*3in ", hole density be 400 mesh ceramic monolith
On, upper carrying capacity is 100g/L.It is then followed by and molecular sieve slurry Zeolite-jl-1 obtained above is coated to above-mentioned preparation
On carrier containing layer of precious metal, upper carrying capacity is 50g/L.In 450 DEG C of constant temperature calcining 2h in Muffle furnace after drying, ASC catalysis is obtained
Agent is simultaneously denoted as S1.
Comparative example 1
Slurry PGM-jl-1 and Zeolite-jl-1 obtained in embodiment 1 is mixed according to existing solid content with 2:1,
Then use ball mill grinding, detection mixing after slurry solid content about 43wt%, be coated to having a size of " 1in*3in ", hole density
On ceramic monolith for 400 mesh, supreme carrying capacity is 150g/L.In 450 DEG C of constant temperature calcining 2h in Muffle furnace, gained sample after drying
It is denoted as B1.
Comparative example 2
By slurry PGM-jl obtained in embodiment 1 be coated to having a size of " 1in*3in ", on the ceramic monolith of 400 mesh, on
Carrying capacity is 100g/L, in 450 DEG C of constant temperature calcining 4h in Muffle furnace after drying.Then after slurry Zeolite-jl being coated to roasting
Obtained bottom is on the carrier of noble metal, and upper carrying capacity is 50g/L, in 450 DEG C of constant temperature calcining 2h in Muffle furnace after drying.Gained
Sample is denoted as B2.
ASC catalyst made from the present embodiment 1, comparative example 1 and comparative example 2 is subjected to NH on fixed bed reactors3Turn
Change efficiency test.Gas composition is simulated when test are as follows: [NH3]=200ppm, [NO]=50ppm, [O2]=10%, [H2O]=
7%, N2As Balance Air, air speed 100000h-1, reaction temperature is 200~500 DEG C；Gas component uses infrared detection.
The NH of ASC catalyst prepared by embodiment 1 and comparative example 13Transformation efficiency comparison is as shown in Figures 1 to 4.Embodiment
1 and comparative example 1 compare, the two shows similar NH in test temperature section3Oxidation activity, and embodiment 1 show it is higher
N2Selectivity.
The NH of ASC catalyst prepared by embodiment 1 and comparative example 23Transformation efficiency comparison is as shown in Figures 1 to 4.With it is each
The sample that preparation will be roasted after the completion of coating is compared, and just applies molecular sieve without calcination process after the completion of layer of precious metal coating
Its NH of the sample of preparation3Oxidation activity is simultaneously uninfluenced, and oxidized byproduct NOxAnd N2O has different degrees of reduction, N2Choosing
Selecting property increases.This explanation can save this process of intermediate calcination in preparing catalyst process, and to properties of sample
There is certain promotion.
Embodiment 2
Platinum nitrate and palladium nitrate solution (mass ratio Pt:Pd=1:2) cerium oxide-titanium oxide is loaded to using infusion process to mix
It closes on oxide, after 80 DEG C of dryings, in 550 DEG C of constant temperature calcining 3h in Muffle furnace.It is molten that 6% zirconium is added in roasting powder obtained
Glue is sized mixing, and addition deionized water adjusts solid content about 40%, then uses ball mill grinding, adjusts pH about 6.5, your gold obtained
Belong to layer slurry, is denoted as PGM-jl-2, it is spare.
Copper nitrate solution is loaded on molecular sieve by ion-exchange, obtained slurries are filtered, wash, dry
Afterwards in 600 DEG C of constant temperature 2h roastings of Muffle furnace.Then 4% silica solution will be added in roasting powder, adds deionized water, then uses ball
Grinding machine grinding, adjusts solid content about 45%, monitors pH about 7, obtains molecular sieve layer slurry, be denoted as Zeolite-jl-2, spare.
Above-mentioned Precious Metal PGM-jl-2 and molecular sieve slurry Zeolite-jl-2 are coated on carrier, coating method
Same as Example 1, wherein carrying capacity is 100g/L on layer of precious metal, and carrying capacity is 50g/L on molecular sieve layer, in Muffle furnace after drying
The catalyst that interior 450 DEG C of constant temperature calcining 2h are obtained is denoted as S2.
Comparative example 3
Above-mentioned Precious Metal PGM-jl-3 and molecular sieve slurry Zeolite-jl-3 are coated on carrier, coating method
Identical as comparative example 2, wherein carrying capacity is 100g/L on layer of precious metal, and carrying capacity is 50g/L on molecular sieve layer, in Muffle furnace after drying
The catalyst that interior 450 DEG C of constant temperature calcining 2h are obtained is denoted as B3.
The catalyst performance of the preparation of embodiment 2 and comparative example 3 is as shown in Fig. 5 to Fig. 8.With embodiment 1 and comparative example 2
It is regular consistent, with it is traditional prepare catalyst process compared with, simplify its NH of the catalyst of technique preparation3Transformation efficiency with etc
Seemingly, and by-product NOxAnd N2O concentration all decreases, N2Selectivity improves after 250 DEG C.
The present invention by the way that layer of precious metal and molecular sieve layer are sized mixing respectively, after the completion of noble-metal coated without
Roasting process, directly coating the catalyst prepared after molecular sieve layer not only can simplify technique, save the cost, and ensure
NH3While transformation efficiency is constant, the generation of by-product is reduced, improves oxidation product N2Selectivity, answers industry from now on
With being of great significance.
Claims (10)
1. a kind of ammoxidation catalyst preparation method for diesel car tail gas refining, it is characterised in that: the catalyst by according to
Secondary two coating of bottom and upper layer coated on carrier surface is made；The bottom is layer of precious metal, by carrier material and its load
Active component be made, active component is Pt or/and Pd；The upper layer is the molecular sieve layer for loading active component, active group
Dividing is one or more of Fe, Mn, Ni, Co, Cu；
Preparation step includes:
1. noble-metal-supported: according to the water pore volume of carrier material, suitable deionized water is added in weighed precious metal solution
In above-mentioned carrier material, obtained powder is dried incipient impregnation in 50~90 DEG C；
2. preparing layer of precious metal powder: by the noble metal powder 1. prepared in air atmosphere, 450~650 DEG C of 2~5h of constant temperature into
Row calcination process；
3. molecular sieve active component loads: the soluble-salt of molecular sieve active component being dissolved in deionized water, and is heated to 50
~90 DEG C, molecular sieve powder is added in 50~90 DEG C of isothermal reaction kettle, then 3~10h of ion exchange is filtered, washed, do
It is dry；
4. roasting prepares molecular sieve layer powder: by the above-mentioned molecular sieve powder 3. obtained under the conditions of air atmosphere, 450~650
DEG C 2~5h of constant temperature carries out calcination process；
5. layer of precious metal powder is sized mixing: water and binder is added in the above-mentioned powder 2. obtained, ball milling slurrying adjusts slurry and contains admittedly
35wt%-50wt% is measured, slurry pH value is less than 7；
6. molecular sieve layer powder is sized mixing: water and binder is added in the above-mentioned powder 4. obtained, ball milling slurrying adjusts slurry and contains admittedly
35wt%~50wt% is measured, slurry pH value is less than 7；
7. powder coats: will Precious Metal above-mentioned 5. obtained coated on ceramic monolith, being then coated with above-mentioned 6. preparing
Molecular sieve slurry, it is dry；
8. calcination process: the above-mentioned integral catalyzer 7. obtained is roasted in air atmosphere, roasting condition be 450~
650 DEG C of 2~5h of constant temperature.
2. the ammoxidation catalyst preparation method according to claim 1 for diesel car tail gas refining, it is characterised in that:
The precious metal support material is one of cerium oxide-titanium oxide, aluminium oxide, Ceria-zirconia, silica-alumina
Or several mixture.
3. the ammoxidation catalyst preparation method according to claim 1 for diesel car tail gas refining, it is characterised in that:
The precious metals pt being supported on precious metal support material: the weight ratio of Pd is 1:0,1:1,1:2,2:1 or 0:1；Load
Amount is 0.05wt%-0.5wt% in terms of precious metal ion.
4. the ammoxidation catalyst preparation method according to claim 1 for diesel car tail gas refining, it is characterised in that:
The molecular sieve be include the mixture with one or both of SAPO-34, SSZ-13 of CHA structure.
5. the ammoxidation catalyst preparation method according to claim 1 for diesel car tail gas refining, it is characterised in that:
The active component of the load over a molecular sieve is Cu；Load capacity is 1.0wt%-4.0wt% with metal ion.
6. the ammoxidation catalyst preparation method according to claim 1 for diesel car tail gas refining, it is characterised in that:
The step layer of precious metal powder size mixing 5. selected binder be one or both of Aluminum sol, zirconium colloidal sol mixing
Object.
7. the ammoxidation catalyst preparation method according to claim 1 for diesel car tail gas refining, it is characterised in that:
The step layer of precious metal powder 5. slurry pH that sizes mixing is adjusted to 4-7.
8. the ammoxidation catalyst preparation method according to claim 1 for diesel car tail gas refining, it is characterised in that:
The step molecular sieve layer powder size mixing 6. selected binder be one or both of silica solution, Aluminum sol mixing
Object.
9. the ammoxidation catalyst preparation method according to claim 1 for diesel car tail gas refining, it is characterised in that:
The step molecular sieve layer powder 6. slurry pH that sizes mixing is adjusted to 4-7.
10. a kind of ammoxidation catalyst for diesel car tail gas refining, it is characterised in that: the catalyst is claim 1
To the catalyst of any one of 9 the method preparations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379254.1A CN110075907A (en) | 2019-05-08 | 2019-05-08 | A kind of ammoxidation catalyst and preparation method thereof for diesel car tail gas refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910379254.1A CN110075907A (en) | 2019-05-08 | 2019-05-08 | A kind of ammoxidation catalyst and preparation method thereof for diesel car tail gas refining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110075907A true CN110075907A (en) | 2019-08-02 |
Family
ID=67419226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910379254.1A Pending CN110075907A (en) | 2019-05-08 | 2019-05-08 | A kind of ammoxidation catalyst and preparation method thereof for diesel car tail gas refining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110075907A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112076803A (en) * | 2020-09-16 | 2020-12-15 | 包头稀土研究院 | Ammonia oxidation catalyst, preparation method and application |
| CN112536031A (en) * | 2019-09-23 | 2021-03-23 | 中国石油化工股份有限公司 | Catalyst for treating industrial waste gas and preparation method thereof |
| CN113198526A (en) * | 2021-04-19 | 2021-08-03 | 得州排放控制技术(无锡)有限公司 | Low-temperature oxidation catalyst for tail gas of diesel vehicle |
| CN114534776A (en) * | 2022-01-19 | 2022-05-27 | 中自环保科技股份有限公司 | Sulfur-resistant diesel vehicle oxidation type catalyst and preparation method thereof |
| CN114904570A (en) * | 2022-01-20 | 2022-08-16 | 安徽艾可蓝环保股份有限公司 | High-nitrogen selective ammonia oxidation catalyst applied to diesel engine and preparation method thereof |
| CN115445654A (en) * | 2022-09-21 | 2022-12-09 | 中国科学院生态环境研究中心 | Diesel vehicle tail gas ammonia purification molecular sieve catalyst, preparation method and application |
| CN115532304A (en) * | 2022-09-21 | 2022-12-30 | 中国科学院生态环境研究中心 | Molecular sieve catalyst for ammonia purification of ammonia internal combustion engine, preparation method and application |
| US11865517B2 (en) | 2020-08-18 | 2024-01-09 | Umicore Ag & Co. Kg | Catalyst for reducing ammonia emissions |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07328438A (en) * | 1994-06-08 | 1995-12-19 | Mitsubishi Heavy Ind Ltd | Catalyst for decomposition of ammonia |
| JP2008279334A (en) * | 2007-05-09 | 2008-11-20 | Ne Chemcat Corp | Selective reduction catalyst and apparatus for cleaning exhaust gas using the same, and method of cleaning exhaust gas |
| CN101454065A (en) * | 2006-05-31 | 2009-06-10 | 尤米科尔股份公司及两合公司 | Catalyst for decreasing nitrogen-containing pollutant gases in the exhaust gas of diesel engines |
| CN102039205A (en) * | 2009-10-21 | 2011-05-04 | 中国石油化工股份有限公司 | Monolithic nitrogen oxide selective reduction catalyst and preparation method thereof |
| CN102869431A (en) * | 2010-06-30 | 2013-01-09 | 恩亿凯嘉股份有限公司 | Flue gas-cleaning device and flue gas-cleaning method that use selective catalytic reduction catalyst |
| CN103442805A (en) * | 2011-03-31 | 2013-12-11 | 恩亿凯嘉股份有限公司 | Ammonia oxidation catalyst, exhaust gas purification device using same, and exhaust gas purification method |
| CN104888845A (en) * | 2015-06-05 | 2015-09-09 | 四川中自尾气净化有限公司 | Platinum/cerium aluminum-molecular sieve catalyst for catalytic oxidation of ammonia gas and preparation method thereof |
| JP2015196116A (en) * | 2014-03-31 | 2015-11-09 | 株式会社キャタラー | Scr catalyst and exhaust gas purification catalyst system |
| CN106823592A (en) * | 2017-03-15 | 2017-06-13 | 四川绵阳华元航升环保科技有限公司 | A kind of preparation method of light-duty diesel vehicle type oxide particle trap |
| CN106944130A (en) * | 2017-03-09 | 2017-07-14 | 无锡威孚环保催化剂有限公司 | A kind of SCR AOC combination catalysts of purification of diesel tail gas and preparation method thereof |
| CN107847864A (en) * | 2015-06-18 | 2018-03-27 | 庄信万丰股份有限公司 | There is no before ASC DOC in the system with SCR catalyst and with the gas extraction system for the ASC for serving as DOC |
-
2019
- 2019-05-08 CN CN201910379254.1A patent/CN110075907A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07328438A (en) * | 1994-06-08 | 1995-12-19 | Mitsubishi Heavy Ind Ltd | Catalyst for decomposition of ammonia |
| CN101454065A (en) * | 2006-05-31 | 2009-06-10 | 尤米科尔股份公司及两合公司 | Catalyst for decreasing nitrogen-containing pollutant gases in the exhaust gas of diesel engines |
| JP2008279334A (en) * | 2007-05-09 | 2008-11-20 | Ne Chemcat Corp | Selective reduction catalyst and apparatus for cleaning exhaust gas using the same, and method of cleaning exhaust gas |
| CN102039205A (en) * | 2009-10-21 | 2011-05-04 | 中国石油化工股份有限公司 | Monolithic nitrogen oxide selective reduction catalyst and preparation method thereof |
| CN102869431A (en) * | 2010-06-30 | 2013-01-09 | 恩亿凯嘉股份有限公司 | Flue gas-cleaning device and flue gas-cleaning method that use selective catalytic reduction catalyst |
| CN103442805A (en) * | 2011-03-31 | 2013-12-11 | 恩亿凯嘉股份有限公司 | Ammonia oxidation catalyst, exhaust gas purification device using same, and exhaust gas purification method |
| JP2015196116A (en) * | 2014-03-31 | 2015-11-09 | 株式会社キャタラー | Scr catalyst and exhaust gas purification catalyst system |
| CN104888845A (en) * | 2015-06-05 | 2015-09-09 | 四川中自尾气净化有限公司 | Platinum/cerium aluminum-molecular sieve catalyst for catalytic oxidation of ammonia gas and preparation method thereof |
| CN107847864A (en) * | 2015-06-18 | 2018-03-27 | 庄信万丰股份有限公司 | There is no before ASC DOC in the system with SCR catalyst and with the gas extraction system for the ASC for serving as DOC |
| CN106944130A (en) * | 2017-03-09 | 2017-07-14 | 无锡威孚环保催化剂有限公司 | A kind of SCR AOC combination catalysts of purification of diesel tail gas and preparation method thereof |
| CN106823592A (en) * | 2017-03-15 | 2017-06-13 | 四川绵阳华元航升环保科技有限公司 | A kind of preparation method of light-duty diesel vehicle type oxide particle trap |
Non-Patent Citations (4)
| Title |
|---|
| C.PAOLUCCI ET.AL: "Chapter One-Catalysis Science of NOx Selective Catalytic Reduction with Ammonia Over Cu-SSZ-13 and Cu-SAPO-34", 《ADVANCES IN CATALYSIS》 * |
| PRITPAL. S. DHILLON ET.AL: "Modeling and analysis of transport and reaction in washcoated monoliths：Cu-SSZ-13 SCR and dual-layer Cu-SSZ-13+Pt/Al2O3 ASC", 《REACTION CHEMISTRY & ENGINEERING》 * |
| SACHI SHRESTHA ET.AL: "Selective oxidation of ammonia on mixed and dual-layer Fe-ZSM-5+Pt/Al2O3 monolithic catalysts", 《CATALYSIS TODAY》 * |
| SACHI SHRESTHA ET.AL: "Selective oxidation of ammonia to nitrogen on bi-functional Cu-SSZ-13 and Pt/Al2O3 monolith catalyst", 《CATALYSIS TODAY》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112536031A (en) * | 2019-09-23 | 2021-03-23 | 中国石油化工股份有限公司 | Catalyst for treating industrial waste gas and preparation method thereof |
| CN112536031B (en) * | 2019-09-23 | 2022-10-11 | 中国石油化工股份有限公司 | Catalyst for treating industrial waste gas and preparation method thereof |
| US11865517B2 (en) | 2020-08-18 | 2024-01-09 | Umicore Ag & Co. Kg | Catalyst for reducing ammonia emissions |
| CN112076803A (en) * | 2020-09-16 | 2020-12-15 | 包头稀土研究院 | Ammonia oxidation catalyst, preparation method and application |
| CN112076803B (en) * | 2020-09-16 | 2023-02-17 | 包头稀土研究院 | Ammonia oxidation catalyst, preparation method and application |
| CN113198526A (en) * | 2021-04-19 | 2021-08-03 | 得州排放控制技术(无锡)有限公司 | Low-temperature oxidation catalyst for tail gas of diesel vehicle |
| CN114534776A (en) * | 2022-01-19 | 2022-05-27 | 中自环保科技股份有限公司 | Sulfur-resistant diesel vehicle oxidation type catalyst and preparation method thereof |
| CN114904570A (en) * | 2022-01-20 | 2022-08-16 | 安徽艾可蓝环保股份有限公司 | High-nitrogen selective ammonia oxidation catalyst applied to diesel engine and preparation method thereof |
| CN115445654A (en) * | 2022-09-21 | 2022-12-09 | 中国科学院生态环境研究中心 | Diesel vehicle tail gas ammonia purification molecular sieve catalyst, preparation method and application |
| CN115532304A (en) * | 2022-09-21 | 2022-12-30 | 中国科学院生态环境研究中心 | Molecular sieve catalyst for ammonia purification of ammonia internal combustion engine, preparation method and application |
| CN115532304B (en) * | 2022-09-21 | 2024-01-19 | 中国科学院生态环境研究中心 | Molecular sieve catalyst for ammonia purification of ammonia internal combustion engine, preparation method and application |
| CN115445654B (en) * | 2022-09-21 | 2024-02-02 | 中国科学院生态环境研究中心 | Molecular sieve catalyst for purifying ammonia in tail gas of diesel vehicle, preparation method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110075907A (en) | A kind of ammoxidation catalyst and preparation method thereof for diesel car tail gas refining | |
| CN109174173B (en) | A kind of molecular sieve SCR catalyst preparation method and its catalyst of preparation | |
| CN106984357B (en) | A kind of SCR catalyst and preparation method thereof for diesel car tail gas refining | |
| EP2965812B1 (en) | Low-temperature scr catalyst for denitrating diesel vehicle exhaust, and preparation method thereof | |
| CN105126825B (en) | A kind of low-temperature denitration of flue gas catalyst and preparation method thereof | |
| CN106902864A (en) | A kind of ammoxidation catalyst for diesel engine vent gas cleaning system and preparation method thereof | |
| CN106944130A (en) | A kind of SCR AOC combination catalysts of purification of diesel tail gas and preparation method thereof | |
| CN104307561A (en) | Oxidative catalyst used for purifying diesel vehicle exhaust, and manufacturing method thereof | |
| CN110180582A (en) | A kind of diesel vehicle oxidation catalyst and preparation method thereof | |
| CN109482226A (en) | One-step method prepares transition metal modified molecular sieve integral type catalyst and method | |
| CN110560056B (en) | Universal small gasoline engine tail gas catalyst and preparation method thereof | |
| CN109647500A (en) | A kind of ammoxidation catalyst and preparation method thereof for end gas purification system for internal combustion | |
| CN109012665A (en) | A kind of double coating three-way catalysts and preparation method thereof | |
| CN104226295B (en) | Cerium zirconium aluminum composite oxides, tail-gas from gasoline automobiles three-way catalyst and their preparation method | |
| CN102438746B (en) | Iron-impregnated zeolite catalysts and method for production thereof, and method for reducing nitrous oxide alone or nitrous oxide and nitrogen monoxide simultaneously using the catalysts | |
| CN108452798B (en) | High-temperature-resistant sintering supported noble metal catalyst for catalytic oxidation of carbon monoxide and preparation method thereof | |
| CN108421557A (en) | Hydrocracking catalyst and preparation method thereof | |
| CN101444733A (en) | Anti-sulfur poisoning cleaning catalyst for vehicle exhaust and preparation method thereof | |
| CN1872409B (en) | Cleaning catalyst for tail gas of automobile, and preparation method | |
| CN105363486B (en) | A kind of preparation method of molecular screen base SCR catalyst | |
| CN105749911B (en) | A kind of preparation method of ammoxidation catalyst | |
| CN109201079A (en) | It can reduce CO and NOxComposition of discharge and its preparation method and application and fluidized catalytic cracking method | |
| CN102580764A (en) | Catalyst for purifying nitric oxide, and preparation method thereof | |
| CN102451697B (en) | Ethylbenzene carbon dioxide hydrogenation catalyst and preparation method thereof | |
| CN107029715B (en) | A kind of rhodium base catalyst and its preparation method and application that polyvinylpyrrolidone PVP is modified |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |