CN105749943A - Low-temperature flue gas denitration catalyst powder and preparation method of low-temperature flue gas denitration catalyst powder - Google Patents
Low-temperature flue gas denitration catalyst powder and preparation method of low-temperature flue gas denitration catalyst powder Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000003546 flue gas Substances 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 13
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims abstract description 11
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910001935 vanadium oxide Inorganic materials 0.000 claims abstract description 11
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims abstract description 10
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims abstract description 8
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical compound [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 claims abstract description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004327 boric acid Substances 0.000 claims abstract description 8
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 8
- 229910052810 boron oxide Inorganic materials 0.000 claims abstract description 6
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000008367 deionised water Substances 0.000 claims abstract description 6
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 7
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 claims description 7
- 229960004643 cupric oxide Drugs 0.000 claims description 6
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 6
- 238000001802 infusion Methods 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 5
- 235000006408 oxalic acid Nutrition 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 11
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000005751 Copper oxide Substances 0.000 abstract 1
- QGAVSDVURUSLQK-UHFFFAOYSA-N ammonium heptamolybdate Chemical compound N.N.N.N.N.N.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Mo].[Mo].[Mo].[Mo].[Mo].[Mo].[Mo] QGAVSDVURUSLQK-UHFFFAOYSA-N 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 238000010531 catalytic reduction reaction Methods 0.000 abstract 1
- 229910000431 copper oxide Inorganic materials 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910001392 phosphorus oxide Inorganic materials 0.000 abstract 1
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 abstract 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 239000011149 active material Substances 0.000 description 4
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical group [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 2
- 229940010552 ammonium molybdate Drugs 0.000 description 2
- 235000018660 ammonium molybdate Nutrition 0.000 description 2
- 239000011609 ammonium molybdate Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- -1 titanium dioxide Chemical compound 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- 208000008316 Arsenic Poisoning Diseases 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/195—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with vanadium, niobium or tantalum
- B01J27/198—Vanadium
- B01J27/199—Vanadium with chromium, molybdenum, tungsten or polonium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses low-temperature flue gas denitration catalyst powder and a preparation method of the low-temperature flue gas denitration catalyst powder. The low-temperature flue gas denitration catalyst powder takes vanadium oxide, molybdenum oxide and tungstic oxide as main active components, takes phosphorus oxide, boron oxide and copper oxide as auxiliary active components and takes titanium dioxide as a carrier. The preparation method comprises the following steps: dissolving ammonium metavanadate, ammonium heptamolybdate and ammonium paratungstate into de-ionized water, and adding copper nitrate, boric acid and triammonium phosphate; heating and adjusting the pH value of the solution to be 2.0 to 3.0; slowly adding nano anatase titanium dioxide into an active component solution and dispersing the mixed active component solution by utilizing ultrasonic waves; drying and calcining to obtain the catalyst. According to the low-temperature flue gas denitration catalyst powder, the activity and the catalytic capability of the low-temperature denitration catalyst are remarkably improved; the low-temperature flue gas denitration catalyst powder has higher mechanical strength and anti-corrosion property, has stronger industrial application value and can be widely applied to NH3 selective catalytic reduction of nitrogen oxide in flue gas.
Description
One technical field
The present invention relates to catalyst technical field, particularly a kind of in the case of flue gas low-temperature (120 DEG C-300 DEG C), NH3Select
Property catalysis reduction (SCR) removing NOXCatalyst and preparation method thereof.
Two technical backgrounds
Nitrogen oxides (NOX) produce essentially from combustion of fossil fuel, it is possible not only to produce acid rain, it is also possible to hydrocarbon
Reaction forms photochemical fog, is one of the main source of current pm2.5 pollutant, develops efficient NO the most targetedlyX
Emission control technique is significant to improving air quality.
NOXProcessing and mainly take in combustion process and the method for burning post processing, current industrial main application is low
Nitrogen burning (LNB), SNCR (SNCR) and SCR (SCR) technology.LNB technology is to change fuel
Combustion system, usual efficiency only has 30-40%.The reaction temperature of SNCR technology is 850 DEG C-1100 DEG C, and this kind of technical efficiency is
High by about 50%, NH can be caused simultaneously3A large amount of escapes.And SCR technology NH3For reducing agent, efficiency generally up to more than 80%, it
Feature be catalyst V2O5-TiO2 in 300 DEG C of-420 DEG C of temperature ranges, there is good catalysis activity.But for power plant
Commercial Application condition outside boiler, owing to flue-gas temperature is low, generally below 300 DEG C, common denitrating catalyst cannot be just
Often application.
Therefore, existing low-temperature denitration catalyst technology cannot be applied by heavy industrialization, and major defect is application temperature
Degree narrow range, removal efficiency application life the highest, actual are short.
Three summary of the invention
It is an object of the invention to, for the deficiencies in the prior art, take with NH3For the SCR technology of reducing agent, with
Based on vanadium/titanium catalyst research, it is provided that a kind of low-temperature denitration of flue gas catalyst with stronger industrial application value and system
Preparation Method.
It is an object of the invention to be achieved through the following technical solutions:
A kind of low-temperature denitration of flue gas catalyst powder, with vanadium oxide, molybdenum oxide, tungsten oxide as main active component, with phosphorous oxide,
Boron oxide, cupric oxide are Supplementary active compounds, with titanium dioxide as carrier；The mass parts of the most each component is: vanadium oxide 0.1-
3.0, molybdenum oxide 0.1-3.1, tungsten oxide 1.0-5.0, phosphorous oxide 0.01-0.1, boron oxide 0.01-0.05, cupric oxide 0.1-1.0,
Titanium dioxide 75-90.
The preparation method of aforesaid low-temperature denitration of flue gas catalyst includes:
(1) configuration active component solution: by the presoma ammonium metavanadate of vanadium oxide, the presoma ammonium paramolybdate of molybdenum oxide, oxidation
The presoma para-tungstic acid ammonia ammonium metavanadate 0.13-3.87 mass parts in proportion of tungsten, ammonium paramolybdate 0.12-3.81 mass parts, secondary tungsten
Acid ammonium 1.13-5.65 mass parts is dissolved in deionized water, adds the copper nitrate of 0.3-0.8 mass parts, 0.02-0.1 mass parts
Boric acid and the triammonium phosphate of 0.03-0.3 mass parts, solution is heated to 50 DEG C-60 DEG C, then with oxalic acid adjust solution ph extremely
2.0-3.0；
(2) use infusion process supported catalyst: Wastewater by Nanometer Anatase titanium dioxide is slowly added to active component solution, 50 DEG C-
In 60 DEG C of solution, stirring dipping 2-3 hour, utilizes ultrasonic wave to disperse mixed active component solution, promotes homogenizing；
Then 120 DEG C-220 DEG C dry 8-11 hour, then 400 DEG C-500 DEG C calcine 3-5 hour, obtain catalyst.
Described utilize ultrasonic wave to mixed active component solution be use ultrasonic wave rod to mixed active component
Solution disperses.
The present invention utilizes infusion process load various active material and coagent, substantially increases active component in catalyst
At the load area of carrier surface, it is effectively increased the contact area of active material and nitrogen oxides.Add various active simultaneously
Material and co-catalyst, be effectively increased low temperature (more than the 120 DEG C) activity of catalyst.
Compared with prior art, its remarkable advantage is the present invention: (1) catalyst provided by the present invention keep vanadium/
On the basis of titanium catalyst commercial Application advantage, significantly improve low-temperature SCR activity (120 DEG C-300 DEG C) of catalyst, be adapted to
Wider application.(2) by adding a certain proportion of various active material and co-catalysis material, it is effectively increased catalyst
Activity.(3) being proved by experimental study, by adding various active material, catalyst has the spy of anti-sulfur dioxide, arsenic poisoning
Property, and make denitration efficiency significantly promote, if NO concentration is at 800ppm, NH3/ NO=1.1, O25 v%, air speed 3000h-1Condition
Under, when 120 DEG C, denitration efficiency improves 5 times, reaches 40%, and when 210 DEG C, efficiency improves 2.5 times, has reached 96.7%.Have
Standby stronger industrial application value, the denitrating flue gas that can be widely applied to various industry is administered.
Four detailed description of the invention
A kind of low-temperature denitration of flue gas catalyst, with vanadium oxide, molybdenum oxide, tungsten oxide as main active component, with phosphorous oxide, oxidation
Boron, cupric oxide are Supplementary active compounds, with titanium dioxide as carrier；The mass parts of the most each component is: vanadium oxide 0.1-3.0,
Molybdenum oxide 0.1-3.1, tungsten oxide 1.0-5.0, phosphorous oxide 0.01-0.1, boron oxide 0.01-0.05, cupric oxide 0.1-1.0, dioxy
Change titanium 75-90.
The preparation method of described low-temperature denitration of flue gas catalyst includes:
(1) configuration active component solution: by the presoma ammonium metavanadate of vanadium oxide, the presoma ammonium paramolybdate of molybdenum oxide, oxidation
The presoma para-tungstic acid ammonia of tungsten is (ammonium metavanadate 0.13-3.87 mass parts, ammonium paramolybdate 0.12-3.81 mass parts, secondary in proportion
Ammonium tungstate 1.13-5.65 mass parts, vanadium oxide is 0.775 with the ratio of ammonium metavanadate, and molybdenum oxide with the ratio of ammonium paramolybdate is
0.885, tungsten oxide is 0.81 with the proportionate relationship of ammonium paratungstate) it is dissolved in deionized water, add the nitre of 0.3-0.8 mass parts
Acid copper, the boric acid of 0.02-0.1 mass parts and the triammonium phosphate of 0.03-0.3 mass parts, solution is heated to 50 DEG C-60 DEG C, then uses
Oxalic acid adjusts solution ph to 2.0-3.0.
(2) infusion process supported catalyst is used: Wastewater by Nanometer Anatase titanium dioxide is slowly added to active component solution, 50
In DEG C-60 DEG C of solution, stirring dipping 2-3 hour, utilizes ultrasonic wave to disperse mixed active component solution, promotes all
Change；Then 120 DEG C-220 DEG C dry 8-11 hour, then 400 DEG C-500 DEG C calcine 3-5 hour, obtain catalyst solid, through powder
Catalyst powder is obtained after broken.
Ultrasonic wave is utilized mixed active component solution to preferably employ ultrasonic wave rod to mixing described in said method
After active component solution disperse.
Embodiment 1.
(1) raw-material preparation (each constituent mass mark): ammonium metavanadate 3%, ammonium paramolybdate 3%, ammonium paratungstate 4%, nitre
Acid copper 0.5 %, boric acid 0.1 %, triammonium phosphate 0.3%, Wastewater by Nanometer Anatase titanium dioxide 89.1%.
(2) configuration active component solution: first prepare and the quality deionized water such as titanium dioxide, is initially charged ammonium metavanadate, secondary
Ammonium molybdate, ammonium paratungstate, add copper nitrate, boric acid, triammonium phosphate, and solution is heated to 60 DEG C and adds oxalic acid, adjusts pH value and arrives
2.0。
(3) infusion process supported catalyst is used: Wastewater by Nanometer Anatase titanium dioxide is slowly added to active component solution, 50
In DEG C-60 DEG C of solution, stirring dipping 2.5 hours, utilize ultrasonic wave to disperse mixed active component solution, promote all
Change；Then 150 DEG C be dried 10 hours, more in atmosphere 430 DEG C calcine 3-5 hour, pulverize, be prepared as catalyst powder.
Embodiment 2.
(1) raw-material preparation (each constituent mass mark): ammonium metavanadate 3.5%, ammonium paramolybdate 2.5 %, ammonium paratungstate 3%,
Copper nitrate 0.6%, boric acid 0.05%, triammonium phosphate 0.2%, Wastewater by Nanometer Anatase titanium dioxide 90.15%.
(2) configuration active component solution: first prepare and the quality deionized water such as titanium dioxide, is initially charged ammonium metavanadate, secondary
Ammonium molybdate, ammonium paratungstate, add copper nitrate, boric acid, triammonium phosphate, and solution is heated to 60 DEG C and adds oxalic acid, adjusts pH value and arrives
2.0。
(3) infusion process supported catalyst is used: Wastewater by Nanometer Anatase titanium dioxide is slowly added to active component solution, 50
In DEG C-60 DEG C of solution, stirring dipping 2.5 hours, utilize ultrasonic wave to disperse mixed active component solution, promote all
Change；Then 150 DEG C be dried 10 hours, more in atmosphere 430 DEG C calcine 3-5 hour, pulverize, be prepared as catalyst powder.
Ultrasonic wave is utilized mixed active component solution to preferably employ ultrasonic wave rod to mixing described in said method
After active component solution disperse.
Claims (3)
1. a low-temperature denitration of flue gas catalyst powder, it is characterised in that with vanadium oxide, molybdenum oxide, tungsten oxide for chief active group
Point, with phosphorous oxide, boron oxide, cupric oxide as Supplementary active compounds, with titanium dioxide as carrier；The mass parts of the most each component
For: vanadium oxide 0.1-3.0, molybdenum oxide 0.1-3.1, tungsten oxide 1.0-5.0, phosphorous oxide 0.01-0.1, boron oxide 0.01-0.05,
Cupric oxide 0.1-1.0, titanium dioxide 75-90.
2. according to the preparation method of the low-temperature denitration of flue gas catalyst described in claim 1, it is characterised in that including:
(1) configuration active component solution: by the presoma ammonium metavanadate of vanadium oxide, the presoma ammonium paramolybdate of molybdenum oxide, oxidation
The presoma para-tungstic acid ammonia ammonium metavanadate 0.13-3.87 mass parts in proportion of tungsten, ammonium paramolybdate 0.12-3.81 mass parts, secondary tungsten
Acid ammonium 1.13-5.65 mass parts is dissolved in deionized water, adds the copper nitrate of 0.3-0.8 mass parts, 0.02-0.1 mass parts
Boric acid and the triammonium phosphate of 0.03-0.3 mass parts, solution is heated to 50 DEG C-60 DEG C, then with oxalic acid adjust solution ph extremely
2.0-3.0；
(2) use infusion process supported catalyst: Wastewater by Nanometer Anatase titanium dioxide is slowly added to active component solution, 50 DEG C-
In 60 DEG C of solution, stirring dipping 2-3 hour, utilizes ultrasonic wave to disperse mixed active component solution, promotes homogenizing；
Then 120 DEG C-220 DEG C dry 8-11 hour, then 400 DEG C-500 DEG C calcine 3-5 hour, obtain catalyst.
3. according to the preparation method of the low-temperature denitration of flue gas catalyst powder described in claim 2, it is characterised in that: described utilization
Ultrasonic wave is to use ultrasonic wave rod to disperse mixed active component solution to mixed active component solution.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108212222A (en) * | 2017-12-29 | 2018-06-29 | 浙江德创环保科技股份有限公司 | A kind of porous honeycomb formula low-temperature denitration catalyst |
| CN109012712A (en) * | 2018-09-30 | 2018-12-18 | 北京方信立华科技有限公司 | A kind of low temperature vanadium titanium-based SCR catalyst and preparation method |
| CN109395756A (en) * | 2018-09-30 | 2019-03-01 | 北京方信立华科技有限公司 | A kind of honeycomb type low temperature high activity SCR catalyst preparation method |
| CN112403486A (en) * | 2020-11-19 | 2021-02-26 | 高化学（江苏）化工新材料有限责任公司 | V/Cu/B/W-TiO2-ZrO2Composite low-temperature denitration catalyst and preparation method thereof |
| CN114289011A (en) * | 2021-12-29 | 2022-04-08 | 大唐南京环保科技有限责任公司 | Denitration catalyst with wide activity temperature window and preparation method and application thereof |
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