CN103191603A - Catalytic filtration material with denitration and dust removal functions and preparation method of catalytic filtration material - Google Patents
Catalytic filtration material with denitration and dust removal functions and preparation method of catalytic filtration material Download PDFInfo
- Publication number
- CN103191603A CN103191603A CN2013101200617A CN201310120061A CN103191603A CN 103191603 A CN103191603 A CN 103191603A CN 2013101200617 A CN2013101200617 A CN 2013101200617A CN 201310120061 A CN201310120061 A CN 201310120061A CN 103191603 A CN103191603 A CN 103191603A
- Authority
- CN
- China
- Prior art keywords
- denitration
- catalyst
- filtrate
- cnt
- filtration material
- 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
Images
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a catalytic filtration material with denitration and dust removal functions and a preparation method of the catalytic filtration material and belongs to the technical field of tail gas control. A MnOx/CNTs low-temperature denitration catalyst is prepared by taking a carbon nano tube as a catalyst carrier through a liquid phase coprecipitation method, and then, a filter material is immersed into an ethanol solution of the catalyst to prepare the catalytic filtration material with uniform loads. By using the catalytic filtration material, defects of complex tail gas purification system and high treatment cost in the prior art can be overcome. Particularly, the acidified carbon nano tube is used as the denitration catalyst carrier, so that the problem that the catalyst is loaded on the filtration material is successfully solved.
Description
Technical field
The invention belongs to tail gas control technology field, be specifically related to a kind of oxidation catalyst filter filtrate with denitration and dedusting function and preparation method thereof.
Background technology
As everyone knows, NOx is one of source of atmospheric pollution, human beings'health is constituted greatly threaten.There is strict restriction various countries to the discharging of NOx, and standard is more and more tighter.Therefore, in the last few years, people had done number of research projects aspect flue-gas denitrification.In numerous denitride technologies, SCR is the highest, the most ripe denitride technology of nitric efficiency.The SCR method is under the special catalyst effect, optionally NOx is reduced to N with ammonia or other reducing agent
2And H
2The method of O.Because it has high efficiency and practicality, has now become the research focus in denitrogenation field.
300 ℃ of business-like vanadium titanium System Catalyst light-off temperature height (〉), be difficult in the smoke processing system end use application, and the installation and operation expense is higher.Therefore, economy is high and be applicable to that the terminal low-temperature SCR technology of handling becomes the focus that the researcher pays close attention to.Mn oxide is easy to carry out redox reaction owing to there is multiple valence state between multiple valence state, therefore become the research focus of low-temperature denitration catalyst.
But the present method that the general employing of control of pollutant is removed separately.Can cause the raising of the big and treatment cost of the complexity, floor space of factory's tail flue gas cleaning system thus.
In the flue gas ash removal field, sack cleaner has become the first-selection of flue gas ash removal, and the fiber source that filtrate has that technological process is simple, speed of production fast, output and labor productivity height, cost are low, available is wide, technology is grasped easily, advantage such as more than the product variety, and increase of production is very fast in worldwide in recent years.Existing deduster can only dedusting, and the NOx in the flue gas is not had the removal effect.So study the emphasis that a kind of sack cleaner that has dedusting and denitration concurrently becomes various countries' research.
CNT is owing to have unique one-dimentional structure, big specific area, superpower mechanical performance, high chemistry and heat endurance and the favorable conductive ability becomes the focus that the nearest more than ten years study in the world.Be applied in the catalyst aspect or all there has been ripe research the film forming aspect, but be that the denitrating catalyst catalyst efficiency at low temperatures of carrier is not high with the CNT, and also do not have suitable technique being applied on the filtering material its success.
Summary of the invention
The object of the present invention is to provide a kind of oxidation catalyst filter filtrate with denitration and dedusting function and preparation method thereof, the present invention introduces the smoke filtration industry with carbon nano-tube catalyst, strengthened the bond strength of catalyst and filtrate on the one hand, made filtrate have good denitration effect; On the other hand, the adding of CNT also will strengthen a series of performances of filtrate such as tensile strength, corrosion-resistant, to strainability of molecule etc.
For achieving the above object, the present invention adopts following technical scheme:
A kind of oxidation catalyst filter filtrate with denitration and dedusting function is catalyst carrier with CNT (being called for short CNTs), makes MnO by liquid-phase coprecipitation
x/ CNTs low-temperature denitration catalyst makes filtrate immerse in the ethanolic solution of this catalyst then and makes the uniform oxidation catalyst filter filtrate of load.Make the oxidation catalyst filter filtrate of different loads amount by the dipping number of times of the control concentration of catalyst solution and filtrate.When catalyst loadings reaches 5mg/cm
2This filtrate has tangible denitration efficiency when above.
Described filtrate is the polyphenylene sulfide needle punched filter material, is to be raw material with the polyphenylene sulfide fibre, is prepared from through shredding, compound batch mixing, combing, lapping, acupuncture, thermal finalization and the press polish of singing, and average pore size is 37 μ m.
The multi-walled carbon nano-tubes that described CNT is bought from commerce (being called for short MWNTs), diameter is 60 ~ 100nm, and length is 5 ~ 15 μ m, and purity is greater than 95%.
Described MnO
x/ CNTs low-temperature denitration catalyst is to be carrier with the CNT handled through red fuming nitric acid (RFNA), and potassium permanganate is reducing agent, and four hydration manganese acetates are catalyst precursor, are solvent with water, make by liquid-phase coprecipitation.
A kind ofly prepare aforesaid method with oxidation catalyst filter filtrate of denitration and dedusting function and may further comprise the steps:
(1) red fuming nitric acid (RFNA) with 3 ~ 10g CNT and 100 ~ 180mL adds in the flask, and put into stirrer, allow mixed liquor at boiling point place backflow 4 ~ 24h, be washed till pH=6 ~ 7 with its filtration and with deionized water after being cooled to room temperature, 60 ~ 100 ℃ of down dry 8 ~ 24h are ground to Powdered standby in vacuum drying chamber;
(2) CNT and the manganese acetate that takes by weighing step (1) put into beaker, is solvent stirring at room 4 ~ 12h with water, adds liquor potassic permanganate then, again vigorous stirring 4 ~ 12h; The ratio of the molal quantity of manganese acetate and potassium permanganate is 3:2 in the solution; In manganese acetate and the potassium permanganate in the molal quantity sum of Mn and the CNT ratio of the molal quantity of C be 1 ~ 8:100; The chemical reaction that relates to is as follows:
3Mn
2+?+?2Mn
7+?→?5Mn
4+
Mn
4+?+?2H
2O?→?MnO
2?+?4H
+
(3) mixed liquor that obtains in the step (2) is extremely neutral with the deionized water filtration washing, and then be dispersed in the ethanol, stir, namely obtain finely dispersed MnO
x/ CNTs catalyst solution;
(4) filtrate is immersed in the catalyst solution that step (3) makes, 120 ℃ of oven dry are taken out in saturated back upon adsorption, namely obtain having the oxidation catalyst filter filtrate of denitration and dedusting function with the load capacity of increase catalyst by repeated impregnations-oven dry number of times.
Remarkable advantage of the present invention is: this oxidation catalyst filter filtrate combines dedusting and two kinds of functions of denitration, makes complicated originally industrial post processing mode become simple, has saved space, place and processing cost greatly, has stronger economic and practical.
Description of drawings
Fig. 1 is MnO
x/ CNTs denitrating catalyst loads to the schematic diagram on the filtrate.
Fig. 2 is in the catalyst activity property testing, self-control tubular type SCR reactor assembly figure.Among the figure, 1 is the vapour source; 2 is pressure-reducing valve; 3 is mass flowmenter; 4 is blender; 5 is air preheater; 6 is catalytic bed; 7 is filtrate; 8 is flue gas analyzer.
The specific embodiment
Below be several specific embodiment of the present invention, further specify the present invention, but the present invention be not limited only to this.
PPS Nomex filtrate in the following example prepares by the following method: be raw material with polyphenylene sulfide (PPS) fiber, prepare the Nomex filtrate through shredding, compound batch mixing, combing, lapping, acupuncture, thermal finalization and the press polish of singing.
Embodiment 1
At first take by weighing 0.3g red fuming nitric acid (RFNA) processed carbon nanotubes and 0.0735 g, four hydration manganese acetates are put into the 200mL beaker, add the 60mL deionized water then and fully stir 6h.Take by weighing 0.0316g potassium permanganate again and add in the deionized water of 60mL, treat to pour in the above-mentioned 200mL beaker after it all dissolves, accelerate mixing speed, continue to stir 12h.At last this mixed liquor is spent deionised water and be filtered to neutrality, add again in the 80mL alcohol solvent and to stir 2h and can make MnO
xThe ethanolic solution of/CNTs denitrating catalyst.The mol ratio of manganese acetate and potassium permanganate is: 3:2.The mol ratio of Mn/C is 2%.
With diameter be 3.8cm circular PPS filtrate immerse in the above-mentioned solution, upon adsorptionly take out dry 5min in 120 ℃ of baking ovens after saturated.Repeat said process and make catalyst loadings reach 60mg 6 times, be i.e. 5.3mg/cm
2
The denitration performance of composite filtering material is estimated in self-control tubular type SCR reactor.NO and NH
3Volume fraction is 0.05 %, O
2Volume fraction is 5 %, and all the other are N
2, gas flow rate is 700mLmin
-1, temperature is set to 160 ℃, and recording the denitration rate with Britain's KM940 flue gas analyzer is 40%; Temperature is set to 190 ℃, and the denitration rate is 56%.
Embodiment 2
At first take by weighing 0.3g red fuming nitric acid (RFNA) processed carbon nanotubes and 0.147 g, four hydration manganese acetates are put into the 200mL beaker, add the 60mL deionized water then and fully stir 4h.Take by weighing 0.0632g potassium permanganate again and add in the deionized water of 60mL, treat to pour in the above-mentioned 200mL beaker after it all dissolves, accelerate mixing speed, continue to stir 8h.At last this mixed liquor is spent deionised water and be filtered to neutrality, add again in the 60mL alcohol solvent and to stir 4h and can make MnO
xThe ethanolic solution of/CNTs denitrating catalyst.The mol ratio of manganese acetate and potassium permanganate is: 3:2.The mol ratio of Mn/C is 4%.
With diameter be 3.8cm circular PPS filtrate immerse in the above-mentioned solution, upon adsorptionly take out dry 5min in 120 ℃ of baking ovens after saturated.Repeat said process and make catalyst loadings reach 100mg 8 times, be i.e. 8.83mg/cm
2
The denitration performance of composite filtering material is estimated in self-control tubular type SCR reactor.NO and NH
3Volume fraction is 0.05 %, O
2Volume fraction is 5 %, and all the other are N
2, gas flow rate is 700mLmin
-1, temperature is set to 160 ℃, and recording the denitration rate with Britain's KM940 flue gas analyzer is 74%; Temperature is set to 190 ℃, and the denitration rate is 90%.
Embodiment 3
At first take by weighing 0.3g red fuming nitric acid (RFNA) processed carbon nanotubes and 0.2205 g, four hydration manganese acetates are put into the 200mL beaker, add the 60mL deionized water then and fully stir 6h.Take by weighing 0.0948g potassium permanganate again and add in the deionized water of 60mL, treat to pour in the above-mentioned 200mL beaker after it all dissolves, accelerate mixing speed, continue to stir 12h.At last this mixed liquor is spent deionised water and be filtered to neutrality, add again in the 80mL alcohol solvent and to stir 2h and can make MnO
xThe ethanolic solution of/CNTs denitrating catalyst.The mol ratio of manganese acetate and potassium permanganate is: 3:2.The mol ratio of Mn/C is 6%.
With diameter be 3.8cm circular PPS filtrate immerse in the above-mentioned solution, upon adsorptionly take out dry 5min in 120 ℃ of baking ovens after saturated.Repeat said process and make catalyst loadings reach 60mg 5 times, be i.e. 5.3mg/cm
2
The denitration performance of composite filtering material is estimated in self-control tubular type SCR reactor.NO and NH
3Volume fraction is 0.05 %, O
2Volume fraction is 5 %, and all the other are N
2, gas flow rate is 700mLmin
-1, temperature is set to 160 ℃, and recording the denitration rate with Britain's KM940 flue gas analyzer is 60%; Temperature is set to 190 ℃, and the denitration rate is 72%.
Embodiment 4
At first take by weighing 0.3g red fuming nitric acid (RFNA) processed carbon nanotubes and 0.2205 g, four hydration manganese acetates are put into the 200mL beaker, add the 60mL deionized water then and fully stir 6h.Take by weighing 0.0948g potassium permanganate again and add in the deionized water of 60mL, treat to pour in the above-mentioned 200mL beaker after it all dissolves, accelerate mixing speed, continue to stir 12h.At last this mixed liquor is spent deionised water and be filtered to neutrality, add again in the 80mL alcohol solvent and to stir 2h and can make MnO
xThe ethanolic solution of/CNTs denitrating catalyst.The mol ratio of manganese acetate and potassium permanganate is: 3:2.The mol ratio of Mn/C is 6%.
With diameter be 3.8cm circular PPS filtrate immerse in the above-mentioned solution, upon adsorptionly take out dry 5min in 120 ℃ of baking ovens after saturated.Repeat said process and make catalyst loadings reach 100mg 8 times, be i.e. 8.83mg/cm
2
The denitration performance of composite filtering material is estimated in self-control tubular type SCR reactor.NO and NH
3Volume fraction is 0.05 %, O
2Volume fraction is 5 %, and all the other are N
2, gas flow rate is 700mLmin
-1, temperature is set to 160 ℃, and recording the denitration rate with Britain's KM940 flue gas analyzer is 78%; Temperature is set to 190 ℃, and the denitration rate is 92%.
In experimenting, we find out that when the mol ratio of Mn/C is 6%, MnO
xThe denitration activity of/CNTs denitrating catalyst is best.The load capacity of catalyst is the principal element that influences this oxidation catalyst filter filtrate denitration performance, and along with the increase of dipping number of times, load capacity increases gradually, when catalyst loadings reaches 5mg/cm
2This filtrate has tangible denitration efficiency (160 ℃ time, the denitration rate is greater than 40%) when above.And two key factors that influence catalyst loadings are: the concentration of catalyst solution and dipping number of times.It is inhomogeneous that the too dense meeting of the concentration of catalyst solution causes carbon nano-tube catalyst to disperse, thereby unite easily after being attached on the filtrate and come off.When catalyst solution concentration too low, though carbon nano-tube catalyst disperse to be impregnated into more at every turn on the filtrate amount seldom, thereby the number of operations that needs can increase and makes catalyst cupport become consuming time and complicated.So controlling certain catalyst solution concentration, rationally to regulate and control the dipping number of times be key in the practical operation.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. oxidation catalyst filter filtrate with denitration and dedusting function is characterized in that: be catalyst carrier with the CNT, make MnO by liquid-phase coprecipitation
x/ CNTs low-temperature denitration catalyst makes filtrate immerse in the ethanolic solution of this catalyst then and makes the uniform oxidation catalyst filter filtrate of load.
2. the oxidation catalyst filter filtrate with denitration and dedusting function according to claim 1, it is characterized in that: described filtrate is the polyphenylene sulfide needle punched filter material, be to be raw material with the polyphenylene sulfide fibre, be prepared from through shredding, compound batch mixing, combing, lapping, acupuncture, thermal finalization and the press polish of singing, average pore size is 37 μ m.
3. the oxidation catalyst filter filtrate with denitration and dedusting function according to claim 1 is characterized in that: the multi-walled carbon nano-tubes that described CNT is bought from commerce, and diameter is 60 ~ 100nm, and length is 5 ~ 15 μ m, and purity is greater than 95%.
4. the oxidation catalyst filter filtrate with denitration and dedusting function according to claim 1 is characterized in that: described MnO
x/ CNTs low-temperature denitration catalyst is to be carrier with the CNT handled through red fuming nitric acid (RFNA), and potassium permanganate is reducing agent, and four hydration manganese acetates are catalyst precursor, are solvent with water, make by liquid-phase coprecipitation.
5. one kind prepares the method with oxidation catalyst filter filtrate of denitration and dedusting function as claimed in claim 1, it is characterized in that: may further comprise the steps:
(1) red fuming nitric acid (RFNA) with 3 ~ 10g CNT and 100 ~ 180mL adds in the flask, and put into stirrer, allow mixed liquor at boiling point place backflow 4 ~ 24h, be washed till pH=6 ~ 7 with its filtration and with deionized water after being cooled to room temperature, 60 ~ 100 ℃ of down dry 8 ~ 24h are ground to Powdered standby in vacuum drying chamber;
(2) CNT and the manganese acetate that takes by weighing step (1) put into beaker, is solvent stirring at room 4 ~ 12h with water, adds liquor potassic permanganate then, again vigorous stirring 4 ~ 12h; The ratio of the molal quantity of manganese acetate and potassium permanganate is 3:2 in the solution; In manganese acetate and the potassium permanganate in the molal quantity sum of Mn and the CNT ratio of the molal quantity of C be 1 ~ 8:100;
(3) mixed liquor that obtains in the step (2) is extremely neutral with the deionized water filtration washing, and then be dispersed in the ethanol, stir, namely obtain finely dispersed MnO
x/ CNTs catalyst solution;
(4) filtrate is immersed in the catalyst solution that step (3) makes, 100 ~ 150 ℃ of oven dry are taken out in saturated back upon adsorption, namely obtain having the oxidation catalyst filter filtrate of denitration and dedusting function with the load capacity of increase catalyst by repeated impregnations-oven dry number of times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101200617A CN103191603A (en) | 2013-04-09 | 2013-04-09 | Catalytic filtration material with denitration and dust removal functions and preparation method of catalytic filtration material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101200617A CN103191603A (en) | 2013-04-09 | 2013-04-09 | Catalytic filtration material with denitration and dust removal functions and preparation method of catalytic filtration material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103191603A true CN103191603A (en) | 2013-07-10 |
Family
ID=48714526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101200617A Pending CN103191603A (en) | 2013-04-09 | 2013-04-09 | Catalytic filtration material with denitration and dust removal functions and preparation method of catalytic filtration material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103191603A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801154A (en) * | 2014-03-03 | 2014-05-21 | 福州大学 | Catalytic filtering material with TiO2 thin film protective layer and preparation method for catalytic filtering material |
| CN104437537A (en) * | 2014-11-18 | 2015-03-25 | 福州大学 | Sulfur dioxide resistant type low temperature ferromanganese oxide denitration catalyst and preparation method thereof |
| CN106731581A (en) * | 2017-01-20 | 2017-05-31 | 中国科学院城市环境研究所 | A kind of activated carbon supported MnO2Preparation method, the equipment and technique of industrial smoke denitration |
| CN106731226A (en) * | 2016-12-09 | 2017-05-31 | 福州大学 | One step in-situ synthesis prepare the method that binary denitration sulfur resistant catalyst loads filtrate |
| CN108636100A (en) * | 2018-04-19 | 2018-10-12 | 南京信息工程大学 | A kind of multi-functional catalysis filtrate preparation method of dedusting denitration |
| CN109224874A (en) * | 2018-11-05 | 2019-01-18 | 南京工业大学 | A kind of catalytic membrane and preparation method thereof for air cleaning |
| CN111841562A (en) * | 2019-04-29 | 2020-10-30 | 北京化工大学 | NH for low-temperature plasma3Catalyst for selective catalytic reduction process and method for preparing the same |
| CN115151328A (en) * | 2020-02-27 | 2022-10-04 | 三菱重工业株式会社 | Method for manufacturing filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812835A (en) * | 2003-04-29 | 2006-08-02 | 约翰逊马西有限公司 | Manganese ozone decomposition catalysts and process for its preparation |
| CN101518718A (en) * | 2008-02-28 | 2009-09-02 | 中国纺织科学研究院 | Functional filter felt for eliminating harmful constituents of fume, preparation method and application method thereof |
| CN101804344A (en) * | 2010-04-28 | 2010-08-18 | 杨巧文 | Manganese/carbon nanotube denitrification catalytic reduction catalyst and preparation method thereof |
| CN101920213A (en) * | 2010-07-23 | 2010-12-22 | 中环（中国）工程有限公司 | Low temperature SCR denitration catalyst taking organic metal framework as carrier and preparation method thereof |
| CN102772953A (en) * | 2012-07-17 | 2012-11-14 | 福州大学 | Preparation method of compound filtering material loaded with efficient denitrification catalyst |
-
2013
- 2013-04-09 CN CN2013101200617A patent/CN103191603A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1812835A (en) * | 2003-04-29 | 2006-08-02 | 约翰逊马西有限公司 | Manganese ozone decomposition catalysts and process for its preparation |
| CN101518718A (en) * | 2008-02-28 | 2009-09-02 | 中国纺织科学研究院 | Functional filter felt for eliminating harmful constituents of fume, preparation method and application method thereof |
| CN101804344A (en) * | 2010-04-28 | 2010-08-18 | 杨巧文 | Manganese/carbon nanotube denitrification catalytic reduction catalyst and preparation method thereof |
| CN101920213A (en) * | 2010-07-23 | 2010-12-22 | 中环（中国）工程有限公司 | Low temperature SCR denitration catalyst taking organic metal framework as carrier and preparation method thereof |
| CN102772953A (en) * | 2012-07-17 | 2012-11-14 | 福州大学 | Preparation method of compound filtering material loaded with efficient denitrification catalyst |
Non-Patent Citations (1)
| Title |
|---|
| LISHAN WANG: "Manganese oxides supported on multi-walled carbon nanotubes for selective catalytic reduction of NO with NH3: Catalytic activity and characterization", 《CHEMICAL ENGINEERING JOURNAL》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801154A (en) * | 2014-03-03 | 2014-05-21 | 福州大学 | Catalytic filtering material with TiO2 thin film protective layer and preparation method for catalytic filtering material |
| CN103801154B (en) * | 2014-03-03 | 2015-06-03 | 福州大学 | Catalytic filtering material with TiO2 thin film protective layer and preparation method for catalytic filtering material |
| CN104437537A (en) * | 2014-11-18 | 2015-03-25 | 福州大学 | Sulfur dioxide resistant type low temperature ferromanganese oxide denitration catalyst and preparation method thereof |
| CN106731226A (en) * | 2016-12-09 | 2017-05-31 | 福州大学 | One step in-situ synthesis prepare the method that binary denitration sulfur resistant catalyst loads filtrate |
| CN106731226B (en) * | 2016-12-09 | 2018-11-27 | 福州大学 | The method that one step in-situ synthesis prepares binary denitration sulfur resistant catalyst load filtrate |
| CN106731581A (en) * | 2017-01-20 | 2017-05-31 | 中国科学院城市环境研究所 | A kind of activated carbon supported MnO2Preparation method, the equipment and technique of industrial smoke denitration |
| CN108636100A (en) * | 2018-04-19 | 2018-10-12 | 南京信息工程大学 | A kind of multi-functional catalysis filtrate preparation method of dedusting denitration |
| CN108636100B (en) * | 2018-04-19 | 2020-12-29 | 南京信息工程大学 | Preparation method of dedusting and denitration multifunctional catalytic filter material |
| CN109224874A (en) * | 2018-11-05 | 2019-01-18 | 南京工业大学 | A kind of catalytic membrane and preparation method thereof for air cleaning |
| CN111841562A (en) * | 2019-04-29 | 2020-10-30 | 北京化工大学 | NH for low-temperature plasma3Catalyst for selective catalytic reduction process and method for preparing the same |
| CN115151328A (en) * | 2020-02-27 | 2022-10-04 | 三菱重工业株式会社 | Method for manufacturing filter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103191603A (en) | Catalytic filtration material with denitration and dust removal functions and preparation method of catalytic filtration material | |
| CN102350340B (en) | Composite smoke denitration catalyst capable of oxidizing zero-valence mercury | |
| CN106512552B (en) | The composite filtering material and preparation method thereof of load ternary denitration sulfur resistant catalyst in situ | |
| CN101528343B (en) | Catalyst for oxidation of metal mercury | |
| CN102335604B (en) | SCR (selective catalyctic reduction) low-temperature denitrification catalyst with nano core-shell structure and preparation method thereof | |
| CN101920213B (en) | Low temperature SCR denitration catalyst taking organic metal framework as carrier and preparation method thereof | |
| CN106390990B (en) | A kind of method of modifying of special type exhaust gas denitration catalyst | |
| CN104888806B (en) | A kind of regeneration method that inactivation vanadium titanium-based Faveolate denitration catalyst combined denitration demercuration is modified | |
| CN104014331B (en) | The preparation method of the Mn-Ce-W composite oxides denitrating catalyst of mesoporous TiO 2 ball load | |
| CN113413904B (en) | g-C 3 N 4 Low-temperature NH of loaded manganese cerium composite oxide 3 -SCR catalyst, preparation method and application thereof | |
| CN102120116A (en) | Denitration catalyst-supported compound filter material and preparation method thereof | |
| CN103657636A (en) | Plate-type catalyst capable of simultaneous denitration and demercuration and preparation method thereof | |
| CN101947443A (en) | Cellular Mn-Ti-based catalyst for low-temperature selective catalytic reduction denitration reaction and preparation method and using method | |
| CN102553348B (en) | Filter material loaded with nanometer catalyst and preparation method and application thereof | |
| CN105771961B (en) | A kind of CeO2Nanotube supported denitrating catalyst and preparation method thereof | |
| CN106731226B (en) | The method that one step in-situ synthesis prepares binary denitration sulfur resistant catalyst load filtrate | |
| CN104759277A (en) | CeOx-MnOx/graphene low-temperature SCR flue gas denitration catalyst and preparation method thereof | |
| CN104923249B (en) | One kind exempts from calcinated type MnO2‑Fe2O3‑Ce2O3‑CeO2/ CNTs low-temperature denitration catalysts | |
| CN104772138B (en) | MnOx/graphene low-temperature SCR flue gas denitration catalyst, preparation method and applications thereof | |
| CN103212245A (en) | Dedusting filter material containing MnO2 catalyst, and preparation method and application thereof | |
| CN103071484A (en) | Preparation method of manganese dioxide nanosheet/CNT (carbon nano tube) denitration catalyst with core-shell structure | |
| CN105709720A (en) | Low-temperature SCR denitration catalyst using halloysite as carrier | |
| CN104001371A (en) | Method for recycling waste dust removal filter material | |
| CN107684907A (en) | A kind of noble metal catalyst for CWO industrial wastewater, preparation method and applications | |
| CN102772953B (en) | Preparation method of compound filtering material loaded with efficient denitrification catalyst |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130710 |