CN110227538A - The preparation method of the high activity DPF coating of NOx and PM is removed simultaneously - Google Patents
The preparation method of the high activity DPF coating of NOx and PM is removed simultaneously Download PDFInfo
- Publication number
- CN110227538A CN110227538A CN201910500280.5A CN201910500280A CN110227538A CN 110227538 A CN110227538 A CN 110227538A CN 201910500280 A CN201910500280 A CN 201910500280A CN 110227538 A CN110227538 A CN 110227538A
- Authority
- CN
- China
- Prior art keywords
- nox
- preparation
- coating
- high activity
- acetate
- 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
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000011248 coating agent Substances 0.000 title claims abstract description 17
- 238000000576 coating method Methods 0.000 title claims abstract description 17
- 230000000694 effects Effects 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 239000002808 molecular sieve Substances 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims abstract description 10
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000011010 flushing procedure Methods 0.000 claims abstract description 9
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 8
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 8
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 8
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 7
- -1 transition metal acetate Chemical class 0.000 claims abstract description 7
- 239000010953 base metal Substances 0.000 claims abstract description 6
- 239000008367 deionised water Substances 0.000 claims abstract description 6
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000003837 high-temperature calcination Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000010992 reflux Methods 0.000 claims abstract description 3
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 claims description 5
- VGBWDOLBWVJTRZ-UHFFFAOYSA-K cerium(3+);triacetate Chemical compound [Ce+3].CC([O-])=O.CC([O-])=O.CC([O-])=O VGBWDOLBWVJTRZ-UHFFFAOYSA-K 0.000 claims description 4
- 229940011182 cobalt acetate Drugs 0.000 claims description 4
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 claims description 4
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 4
- JLRJWBUSTKIQQH-UHFFFAOYSA-K lanthanum(3+);triacetate Chemical compound [La+3].CC([O-])=O.CC([O-])=O.CC([O-])=O JLRJWBUSTKIQQH-UHFFFAOYSA-K 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 abstract description 12
- 230000000977 initiatory effect Effects 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- 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
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/723—CHA-type, e.g. Chabazite, LZ-218
-
- 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
- B01J29/82—Phosphates
- B01J29/84—Aluminophosphates containing other elements, e.g. metals, boron
- B01J29/85—Silicoaluminophosphates [SAPO compounds]
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/617—500-1000 m2/g
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The present invention provides the preparation method of high activity DPF coating that is a kind of while removing NOx and PM, comprising the following steps: (1) transition metal acetate of certain mass is dissolved in deionized water, small pore molecular sieve powder is added, flowed back in 45-65 DEG C, stir 4~8h；(2) it is dried through filters pressing, flushing, microwave radiation；(3) by the mantoquita of certain mass, ammonium hydrogen carbonate, wiring solution-forming adds powder obtained in (2), and 4~8h is stirred in 45-60 DEG C of reflux；(4) through filters pressing, flushing, drying, 5~8h of high-temperature calcination, the base metal coating of NOx and PM is removed simultaneously.Catalyst prepared by the present invention has lower PM initiation temperature, while removing PM efficiency and being up to 92% or more, and removal NOx efficiency is up to 95% or more, can satisfy the requirement of six emission regulation of state.
Description
Technical field
The present invention relates to diesel vehicles to post-process draining technology field, and in particular to while removing the high activity DPF of NOx and PM
The preparation method of coating.
Background technique
With the gradually upgrading of environmental regulation, NOx the and PM limit value of emission of diesel engine is increasingly stringenter.With six row of state
The promulgation of regulation is put, future further adds emission limit sternly, and the discharge of state VI stage nitrogen oxide NOx will be on the existing basis state V
On be greatly reduced about 77%, while 700,000 kilometers are reached to the life requirement of SCR catalytic converter.This is arranged diesel engine is engaged in
Putting for the scientific and technological circle and industrial circle of pollution control technology research and development is unprecedented challenge.In addition, with WHTC/
The implementation of WHSC, engine exhaust temperature require lower.For these requirements, vanadia-based SCR catalysts because its low-temperature catalytic activity,
The limitations such as pyrolytic generation severe toxicity and temperature window are narrow, it is impossible to meet state VI for the emission request of NOx.
Currently, to meet more harsh stringent state six, the technology road of the diesel engine vent gas purification of most main engine plants
Line is DOC+DPF+SCR+ASC, it can be seen that compared to five technology of state, state six adds one section of DPF in SCR processor front end, be for
Removal PM, DPF removal PM generally use two ways, and one is 600 DEG C of high temperature or more oil spouts to remove PM by burning；It is another
Kind is on DPF by coating catalyst.Due to needing frequent oil spout in initiative regeneration, on the one hand often high temperature can damage carrier,
On the other hand economic cost can be greatly increased.
Summary of the invention
It is an object of the present invention to overcome the shortcomings of the prior art and provide a kind of height for removing NOx and PM simultaneously
The preparation method of active DPF coating, this preparation method use non-precious metal catalyst, and not only preparation cost is low, while being easy to criticize
Amount production.The catalyst of preparation has lower PM initiation temperature, while removing PM efficiency and being up to 92% or more, removal NOx effect
Rate is up to 95% or more, can satisfy the requirement of six emission regulation of state.The technical solution adopted by the present invention is that:
Mentality of designing of the invention is on the one hand can to reduce PM initiation temperature by coating a kind of catalyst on DPF,
It remove it can using exhaust temperature, do not need additional regular oil spout, substantially reduce economic cost；On the other hand also have
The function of removing NOx, can make after DPF processor, have lower NOx value after processing, higher convenient for SCR postprocessor
Effect ground removal NOx, to meet the requirement of six emission regulation of state.
A kind of preparation method of high activity DPF coating that is while removing NOx and PM, comprising the following steps:
(1) transition metal acetate of certain mass is dissolved in deionized water, small pore molecular sieve powder is added, in 45-
65 DEG C of reflux, stir 4~8h；
(2) it is dried through filters pressing, flushing, microwave radiation；
(3) by the mantoquita of certain mass, ammonium hydrogen carbonate, wiring solution-forming adds powder obtained in (2), and 45-60 DEG C is returned
Stream stirs 4~8h；
(4) through filters pressing, flushing, drying, 5~8h of high-temperature calcination, the base metal coating of NOx and PM is removed simultaneously.
Further, the transition metal acetate is one of cerous acetate, cobalt acetate or lanthanum acetate or combination.
Further, the mantoquita is one of copper acetate or copper nitrate or combination.
Further, the frequency of the microwave radiation is 800~1200HZ.
Further, the small pore molecular sieve powder is one of SSZ-13, Sapo-34 or combination.
Further, the transition metal acetate/small pore molecular sieve powder/mantoquita/ammonium hydrogen carbonate mass ratio is
0.025-0.036/0.95-0.96/0.008-0.013/0.0005-0.008。
Advantages of the present invention: this preparation method uses non-precious metal catalyst, and not only preparation cost is low, while being easy to batch
Production.The catalyst PM initiation temperature of preparation is 220 DEG C, and removal PM efficiency is up to 92% or more, and removal NOx efficiency is up to 95%
More than, it can satisfy the requirement of six emission regulation of state.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
Below with reference to specific drawings and examples, the invention will be further described.
Embodiment 1；
(1) weighed 51g cerous acetate is dissolved in 2500g deionized water, and small pore molecular sieve powder 2000g SSZ-13 is added,
It flows back in 45 DEG C, stirs 8h；
(2) through filters pressing, rinse 2 times, 1000HZ microwave radiation dry；
(3) 17g copper acetate, 1g ammonium hydrogen carbonate are weighed, wiring solution-forming adds powder obtained in (2), and 45 DEG C are flowed back,
Stir 8h；
(4) through filters pressing, flushing, 105 DEG C of drying, high-temperature calcination 5h, the base metal for being removed NOx and PM simultaneously is applied
Layer.
Embodiment 2；
(1) weighed 48g cobalt acetate is dissolved in 2600g deionized water, and small pore molecular sieve powder 1800g Sapo- is added
34, it flows back in 65 DEG C, stirs 4h；
(2) through filters pressing, rinse 2 times, 1200HZ microwave radiation dry；
(3) 20g copper nitrate, 0.8g ammonium hydrogen carbonate are weighed, wiring solution-forming adds powder obtained in (2), and 60 DEG C are returned
Stream stirs 4h；
(4) through filters pressing, flushing, 105 DEG C of drying, high-temperature calcination 8h, the base metal for being removed NOx and PM simultaneously is applied
Layer.
Embodiment 3；
(1) weighed 56g lanthanum acetate is dissolved in 2800g deionized water, and small pore molecular sieve powder 800g Sapo-34 is added
It with 800g SSZ-13, flows back in 60 DEG C, stirs 4h；
(2) through filters pressing, rinse 2 times, 1200HZ microwave radiation dry；
(3) 22g copper acetate, 1.3g ammonium hydrogen carbonate are weighed, wiring solution-forming adds powder obtained in (2), and 60 DEG C are returned
Stream stirs 4h；
(4) through filters pressing, flushing, 105 DEG C of drying, high-temperature calcination 6h, the base metal for being removed NOx and PM simultaneously is applied
Layer.
It should be noted that in other embodiments,
It using certain two kinds combination in cerous acetate, cobalt acetate, lanthanum acetate is also feasible in step (1)；
It is also feasible that the combination of copper acetate and copper nitrate is used in step (3).
Table 1
| Embodiment | Specific surface area/m2/g |
| Embodiment 1 | 598 |
| Embodiment 2 | 605 |
| Embodiment 3 | 596 |
| Commercial catalysts | 568 |
Table 2
As it can be seen from table 1 embodiment 1-3 specific surface area of catalyst prepared by the present invention has all in 596m2/g or more
Preferable surface area；1-3 of the embodiment of the present invention prepares catalyst light-off temperature at 220 DEG C as can be seen from Table 2, while 200
DEG C removal NOx efficiency is up to 92% or more, and 280 DEG C of removal PM efficiency are up to 90% or more, hence it is evident that due to commercial catalysts effect,
It can satisfy state's six stages NOx and PM limit value requirement.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (6)
1. a kind of preparation method for the high activity DPF coating for removing NOx and PM simultaneously, which comprises the following steps:
(1) transition metal acetate of certain mass is dissolved in deionized water, small pore molecular sieve powder is added, in 45-65 DEG C
4~8h is stirred in reflux；
(2) it is dried through filters pressing, flushing, microwave radiation；
(3) by the mantoquita of certain mass, ammonium hydrogen carbonate, wiring solution-forming adds powder obtained in (2), and 45-60 DEG C is flowed back,
Stir 4~8h；
(4) through filters pressing, flushing, drying, 5~8h of high-temperature calcination, the base metal coating of NOx and PM is removed simultaneously.
2. the preparation method of the high activity DPF coating as described in claim 1 for removing NOx and PM simultaneously, which is characterized in that
The transition metal acetate is one of cerous acetate, cobalt acetate or lanthanum acetate or combination.
3. the preparation method of the high activity DPF coating as described in claim 1 for removing NOx and PM simultaneously, which is characterized in that
The mantoquita is one of copper acetate or copper nitrate or combination.
4. the preparation method of the high activity DPF coating as described in claim 1 for removing NOx and PM simultaneously, which is characterized in that
The frequency of the microwave radiation is 800~1200HZ.
5. the preparation method of the high activity DPF coating as described in claim 1 for removing NOx and PM simultaneously, which is characterized in that
The small pore molecular sieve powder is one of SSZ-13, Sapo-34 or combination.
6. the preparation method of the high activity DPF coating as described in claim 1 for removing NOx and PM simultaneously, which is characterized in that
The transition metal acetate/small pore molecular sieve powder/mantoquita/ammonium hydrogen carbonate mass ratio is 0.025-0.036/
0.95-0.96/0.008-0.013/0.0005-0.008。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910500280.5A CN110227538A (en) | 2019-06-11 | 2019-06-11 | The preparation method of the high activity DPF coating of NOx and PM is removed simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910500280.5A CN110227538A (en) | 2019-06-11 | 2019-06-11 | The preparation method of the high activity DPF coating of NOx and PM is removed simultaneously |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110227538A true CN110227538A (en) | 2019-09-13 |
Family
ID=67858738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910500280.5A Pending CN110227538A (en) | 2019-06-11 | 2019-06-11 | The preparation method of the high activity DPF coating of NOx and PM is removed simultaneously |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110227538A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751082A (en) * | 2021-09-27 | 2021-12-07 | 苏州松之源环保科技有限公司 | Coating method of non-noble metal SDPF double-coating catalyst |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188971A (en) * | 2011-03-31 | 2011-09-21 | 济南大学 | Quadruple effect catalyst of diesel tail gas and preparation method and application of quadruple effect catalyst |
| CN103079683A (en) * | 2010-06-02 | 2013-05-01 | 约翰森·马瑟公开有限公司 | Diesel particulate filter |
| CN103582523A (en) * | 2011-04-28 | 2014-02-12 | 恩亿凯嘉股份有限公司 | Off gas purification device |
| CN106984357A (en) * | 2017-04-17 | 2017-07-28 | 中自环保科技股份有限公司 | It is a kind of for SCR catalyst of diesel car tail gas refining and preparation method thereof |
| CN107376990A (en) * | 2017-06-27 | 2017-11-24 | 中国第汽车股份有限公司 | Preparation method with loose porous SCR catalyst |
| EP3323509A1 (en) * | 2016-11-16 | 2018-05-23 | Hyundai Motor Company | Cu/lta catalyst and exhaust system, and manufacturing method of cu/lta catalyst |
| CN108160107A (en) * | 2017-12-29 | 2018-06-15 | 中国第汽车股份有限公司 | The ceramic monolith active coating method of NOx in fabricated in situ removal exhaust gas from diesel vehicle |
-
2019
- 2019-06-11 CN CN201910500280.5A patent/CN110227538A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103079683A (en) * | 2010-06-02 | 2013-05-01 | 约翰森·马瑟公开有限公司 | Diesel particulate filter |
| CN102188971A (en) * | 2011-03-31 | 2011-09-21 | 济南大学 | Quadruple effect catalyst of diesel tail gas and preparation method and application of quadruple effect catalyst |
| CN103582523A (en) * | 2011-04-28 | 2014-02-12 | 恩亿凯嘉股份有限公司 | Off gas purification device |
| EP3323509A1 (en) * | 2016-11-16 | 2018-05-23 | Hyundai Motor Company | Cu/lta catalyst and exhaust system, and manufacturing method of cu/lta catalyst |
| CN106984357A (en) * | 2017-04-17 | 2017-07-28 | 中自环保科技股份有限公司 | It is a kind of for SCR catalyst of diesel car tail gas refining and preparation method thereof |
| CN107376990A (en) * | 2017-06-27 | 2017-11-24 | 中国第汽车股份有限公司 | Preparation method with loose porous SCR catalyst |
| CN108160107A (en) * | 2017-12-29 | 2018-06-15 | 中国第汽车股份有限公司 | The ceramic monolith active coating method of NOx in fabricated in situ removal exhaust gas from diesel vehicle |
Non-Patent Citations (2)
| Title |
|---|
| LIDIJA V. TRANDAFILOVIC等: ""A kinetic model for SCR coated particulate filters-Effect of ammonia-soot interactions"", 《APPLIED CATALYSIS B: ENVIRONMENTAL》 * |
| 迟斌: ""Cu-Ce-La-SSZ-13催化剂的制备及其脱硝性能研究"", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅰ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113751082A (en) * | 2021-09-27 | 2021-12-07 | 苏州松之源环保科技有限公司 | Coating method of non-noble metal SDPF double-coating catalyst |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101932803B (en) | Exhaust system implementing scr and egr | |
| KR101735851B1 (en) | Catalyst composition for selective catalytic reduction of exhaust gases | |
| CN103615299B (en) | The method and system of design diesel engine post-processing system | |
| WO2015161627A1 (en) | Honeycomb denitration catalyst for flue gas at 400°c-600°c and preparation method therefor | |
| CN104549398B (en) | A kind of micropore ceramics catalyst and preparation method thereof | |
| CN103657632B (en) | A kind of base extraction monoblock type chromium oxide catalyst and preparation method and application | |
| CN109529924B (en) | DOC molecular sieve catalyst, preparation thereof and application of DOC molecular sieve catalyst in catalytic oxidation of diesel vehicle tail gas | |
| JP2009538736A (en) | High temperature ammonia SCR catalyst and its use | |
| KR20140027062A (en) | Selective reduction catalyst, and exhaust gas purification device and exhaust gas purification method using same | |
| CN109590014B (en) | Integral diesel vehicle tail gas oxidation catalyst and preparation method thereof | |
| CN110227538A (en) | The preparation method of the high activity DPF coating of NOx and PM is removed simultaneously | |
| CN105214680A (en) | A kind of chloride catalyst for purifying organic waste gas and preparation method thereof | |
| JP2013139035A (en) | Exhaust gas purifying method using selective reduction catalyst | |
| CN103071524A (en) | Oxidation catalyst for purifying diesel engine waste gas and preparation method of oxidation catalyst | |
| CN111085217B (en) | Three-dimensional porous Mn-Co microspheres grown on cordierite, and preparation and application thereof | |
| DE112020001863T5 (en) | Systems and methods for the desulfation of catalysts included in aftertreatment systems | |
| CN111530448A (en) | High-sulfur-resistance nonmetal-doped metal oxide denitration catalyst and preparation method thereof | |
| CN105126922A (en) | Vanadium-free SCR denitration catalyst and preparation method thereof | |
| CN105964252A (en) | Diesel engine exhaust pollutant control catalyst matched with DPF/CDPF (diesel particulate filter/catalyzed diesel particulate filter) for use, as well as preparation and application | |
| CN1132687C (en) | Automobile tail gas cleaning catalyst and its preparation method | |
| CN111219236A (en) | Diesel engine tail gas aftertreatment system | |
| EP2719454A1 (en) | Thermostable Vanadia SCR catalyst and a process of preparation thereof | |
| CN106050372A (en) | Vehicle three-way catalytic converter for collecting integrated particulate matters | |
| CN104759281A (en) | Preparation method of composite oxide catalyst used for purifying diesel engine | |
| CN113181910B (en) | Marine diesel engine high-sulfur tail gas particle trapping catalyst and preparation method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190913 |