CN105709720A - Low-temperature SCR denitration catalyst using halloysite as carrier - Google Patents
Low-temperature SCR denitration catalyst using halloysite as carrier Download PDFInfo
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- CN105709720A CN105709720A CN201610044837.5A CN201610044837A CN105709720A CN 105709720 A CN105709720 A CN 105709720A CN 201610044837 A CN201610044837 A CN 201610044837A CN 105709720 A CN105709720 A CN 105709720A
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- galapectite
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- 239000003054 catalyst Substances 0.000 title claims abstract description 75
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 title abstract 5
- 229910052621 halloysite Inorganic materials 0.000 title abstract 5
- 229940071125 manganese acetate Drugs 0.000 claims abstract description 16
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims abstract description 16
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 238000011065 in-situ storage Methods 0.000 claims abstract description 9
- 238000012216 screening Methods 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 14
- 229910016978 MnOx Inorganic materials 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000003786 synthesis reaction Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical group O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 2
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000004913 activation Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 238000000967 suction filtration Methods 0.000 abstract 1
- 239000011572 manganese Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000006193 liquid solution Substances 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 206010035745 Pneumonitis chemical Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 1
- 201000001811 toxic pneumonitis Diseases 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
-
- 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
- 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
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/2073—Manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The invention provides a low-temperature SCR denitration catalyst using halloysite as the carrier. The catalyst is prepared through an in-situ growth method. A preparation method of the catalyst includes the steps of firstly, screening 200- to 400-mesh halloysite; secondly, soaking the halloysite into a manganese acetate solution in an equal-volume manner for 24 hours, and adding a potassium permanganate solution for oxidation activation; performing suction filtration, washing and drying to obtain the low-temperature SCR denitration catalyst. The low-temperature SCR denitration catalyst has the advantages that the halloysite is used as the carrier of the denitration catalyst for the first time; the denitration catalyst is simple in preparation process, high-temperature activation is not needed, and production cost is lowered; the catalyst lowers the operation temperature of SCR, activation can be achieved at 60 DEG C when NH3 is used as the reducing agent in an SCR process, and NO removing rate at 100-250 DEG C reaches above 95%.
Description
Technical field
The invention belongs to technical field of atmospheric pollution control, relate to the preparation method of flue-gas denitration process, specifically
It it is a kind of low temperature SCR denitration catalyst with galapectite as carrier.
Background technology
Coal burning can produce the harmful substances such as a large amount of nitrogen oxides, dust and oxysulfide.Nitrogen oxides is
One of main atmosphere pollution, it not only can be detrimental to health, and can cause acid rain, photochemistry cigarette
The serious environmental problems such as mist, greenhouse effect.Dust is also the thin of one of atmosphere pollution, especially below PM10
Microparticle thing, not only can weaken solar radiation and uitraviolet intensity, also can reduce atmospheric visibility.Additionally,
Below PM2.5 particulate matter easily sucks human lung, causes toxic pneumonitis or pneumosilicosis, even can cause pulmonary carcinoma.
Single removal method removal NOx or dust cannot meet the discharging standards of increasingly stringent, coal-fired flue-gas
Multiple pollutant integration removing is then inevitable development trend, and this kind of method can simplify gas cleaning flow process,
Also reduce operating cost.
SCR (SCR) technology is that Current commercial is applied at most, the most fruitful a kind of flue gas takes off
Nitre technology, and SCR technology core is catalyst.At present, vanadium titanium catalyst (V2O5/TiO2Or V2O5-WO3/TiO2)
Being the catalyst of business application more maturation, its optimal reaction temperature is 300-400 DEG C, belongs to middle high temperature SCR
Catalyst.So SCR system can only be preposition in air preheater (high concentrate dust and high SO2Environment) very
It is easily caused catalyst poisoning inactivation.Pacified so developing highly active low temperature (100-200 DEG C) catalyst
Put the focus becoming current research after cleaner unit.
In recent years, manganese-based catalyst was subject to owing to showing excellent denitration activity in reacting at low-temperature SCR
Extensive concern, such as MnOx/ACF, MnOx/TiO2, MnOx/CNTs etc., also have been reported that and help adding among these
Catalyst.To improve sulfur dioxide in flue gas and the poison resistance of water.The low temperature catalyst that the present invention relates to is
With galapectite as carrier, load MnOx catalyst with in situ synthesis.Galapectite with kaolin families seemingly, but has
Tubular structure, its rich reserves, preparation cost is low, has high-specific surface area, higher adsorptivity, simultaneously
Catalyst is had preferable dispersive property.
Summary of the invention
It is an object of the invention to for above-mentioned existing problems, it is provided that a kind of low-temperature SCR with galapectite as carrier
Denitrating catalyst and preparation method thereof, this catalyst degradation operation temperature of SCR, widen the temperature of SCR
Degree window, has outstanding NO removal efficiency at 100-300 DEG C, and using galapectite is carrier rich reserves, system
Standby one-tenth low cost, in situ synthesis preparation technology is simple, it is not necessary to calcining power consumption, beneficially environmental protection and resource
Comprehensive utilization.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of low temperature SCR denitration catalyst with galapectite as carrier, described catalyst with galapectite as carrier,
With MnOx as major catalyst, using in situ synthesis to prepare, major catalyst is in low temperature SCR denitration catalyst
Mass percent be 2-12%.
Concrete, described a kind of low temperature SCR denitration catalyst with galapectite as carrier, described wherein MnOx
For MnO2、Mn3O4And Mn2O3In the mixture of one or more arbitrary proportions.
Concrete, described a kind of low temperature SCR denitration catalyst with galapectite as carrier, use the most raw
Prepared by regular way, comprise the following steps:
1) preparation of galapectite: galapectite is sieved, takes 200-400 mesh；
2) load of catalyst: galapectite is immersed in the manganese acetate solution that concentration is 5-35wt%, stirring
Uniformly, left at room temperature 24h, then add potassium permanganate solution oxidized activating 4-10h, finally spend from
Sub-water washing sucking filtration, then at 110 DEG C of dry 12h, grinds screening, takes 20-40 mesh, obtain low-temperature SCR
Catalyst.
Concrete, described galapectite is 1g/mL with the solid-liquid ratio of manganese acetate aqueous solution.
Concrete, in described step 2, manganese acetate and potassium permanganate mol ratio are 2:3.
There is advantages that the operation temperature of this catalyst degradation SCR, widen SCR
Temperature window, at 100-300 DEG C there is outstanding NO removal efficiency, using galapectite is carrier rich reserves,
Being prepared as low cost, in situ synthesis preparation technology is simple, it is not necessary to calcining power consumption, beneficially environmental protection and resource
The advantage such as comprehensive utilization, compared with prior art, this patent has certain advantage.
Using galapectite in the present invention is carrier, has the advantages that specific surface area is big, the absorption to gaseous material
Ability is strong.(HNTs, molecular formula is Al to galapectite2Si2O5(OH)4·2H2O, molecular weight is 258.16g/mol),
Tubular structure (diameter about 50nm, length about 1000nm), has stronger loading to zwitterion.
In situ synthesis supported catalyst, on carrier, is a kind of simple method, it is contemplated that galapectite is only
Special space structure, combines incipient impregnation with coprecipitation method.But when load capacity is bigger,
Particularly when the specific surface area of carrier is little, catalyst is easily piled up at carrier surface, so makes catalyst
The bad phenomenon such as sintering, reunion the most easily occur.This patent uses the load capacity all the time of 2-14%.
Utilizing galapectite for carrier, cost of manufacture is low, uses in situ synthesis, and preparation technology is simple, has important
Significance for Environment and economic implications.
The catalyst of manganio has excellent low-temperature SCR characteristic, potassium permanganate oxidation activation manganese acetate, generates
Manganese present many oxide state, thus present different performances, but main with MnO2Form exists.
Under medium and low temperature, MnO2There is higher activity.
Accompanying drawing explanation
Fig. 1 is the catalyst denitration efficiency for preparing of embodiment 1 change curve with reaction temperature.
Fig. 2 is the catalyst denitration efficiency for preparing of embodiment 2 change curve with reaction temperature.
Fig. 3 is the catalyst denitration efficiency for preparing of embodiment 3 change curve with reaction temperature.
Fig. 4 is the catalyst denitration efficiency for preparing of embodiment 4 change curve with reaction temperature.
Fig. 5 is that galapectite unsupported denitration activity component is schemed with galapectite load denitration activity component TEM.
In figure: embodiment 1 catalyst Mn2/ HNTs catalysis activity is continuously increased along with the rising of temperature,
In 250-300 DEG C of interval, denitration rate reaches more than 90%, other catalyst higher than synthermal section, and 250 DEG C
Following denitration rate is relatively low relative to other load capacity catalyst, illustrates that wherein high temperature SCR activity is more excellent, and low temperature
SCR activity is relatively poor；Embodiment 2 catalyst Mn6/ HNTs reaches at 150-200 DEG C of temperature section NO clearance
To more than 95%, temperature window is narrower；Embodiment 3 catalyst Mn8/ HNTs and embodiment 4 catalyst Mn10/HNTs
When 60 DEG C, denitration rate is respectively 50%, and 63%, 100-200 DEG C of denitration rate is held in more than 95%, and
Embodiment 3 is more excellent than embodiment 4, though denitration rate has declined but has remained at more than 85% after 200 DEG C,
Obviously, consider with activity from economy, embodiment 3 catalyst Mn8/ HNTs is optimal.
The right figure of Fig. 5 is embodiment 3 catalyst Mn8The TEM figure of/HNTs, can be observed galapectite tube wall load
Mn oxide crystal grain.
Detailed description of the invention
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Embodiment 1:Mn2/ HNTs catalyst
1,10g galapectite, grain graininess 200-400 mesh are weighed.
2, take 0.52g potassium permanganate and dissolve；Take 0.54g manganese acetate and add suitable quantity of water dissolving as forerunner
Liquid solution, with the solid-liquid ratio of 1:1, impregnated in galapectite in manganese acetate solution, is uniformly mixed, room
After the lower dipping 24h of temperature, impregnate 24h under room temperature, add potassium permanganate solution, be uniformly mixed, under room temperature
Stand 8h.Sucking filtration cleans, and is dried 12h, prepares Mn under the conditions of 110 DEG C2/ HNTs catalyst, wherein subscript 2
Represent the mass fraction (wt%) of catalyst shared by Mn element.
Embodiment 2:Mn6/ HNTs catalyst
1,10g galapectite, grain graininess 200-400 mesh are weighed.
2, take 1.5g potassium permanganate and dissolve；Take 1.6g manganese acetate and add suitable quantity of water dissolving as presoma
Solution, with the solid-liquid ratio of 1:1, impregnated in galapectite in manganese acetate solution, is uniformly mixed, room temperature
After lower dipping 24h, impregnate 24h under room temperature, add potassium permanganate solution, be uniformly mixed, quiet under room temperature
Put 8h.Sucking filtration cleans, and is dried 12h, prepares Mn under the conditions of 110 DEG C6/ HNTs catalyst, wherein subscript 6 table
Show the mass fraction (wt%) of catalyst shared by Mn element.
Embodiment 3:Mn8/ HNTs catalyst
1,10g galapectite, grain graininess 200-400 mesh are weighed.
2, take 2.07g potassium permanganate and dissolve；Take 2.14g manganese acetate and add suitable quantity of water dissolving as forerunner
Liquid solution, with the solid-liquid ratio of 1:1, impregnated in galapectite in manganese acetate solution, is uniformly mixed, room
After the lower dipping 24h of temperature, impregnate 24h under room temperature, add potassium permanganate solution, be uniformly mixed, under room temperature
Stand 8h.Sucking filtration cleans, and is dried 12h, prepares Mn under the conditions of 110 DEG C8/ HNTs catalyst, wherein subscript 8
Represent the mass fraction (wt%) of catalyst shared by Mn element.
Embodiment 4:Mn10/ HNTs catalyst
1,10g galapectite, grain graininess 200-400 mesh are weighed.
2, take 2.585g potassium permanganate and dissolve；Take 2.674g manganese acetate and add suitable quantity of water dissolving as front
Drive liquid solution, with the solid-liquid ratio of 1:1, galapectite be impregnated in manganese acetate solution, be uniformly mixed,
After impregnating 24h under room temperature, impregnate 24h under room temperature, add potassium permanganate solution, be uniformly mixed, room temperature
Lower standing 8h.Sucking filtration cleans, and is dried 12h, prepares Mn under the conditions of 110 DEG C10/ HNTs catalyst, wherein under
The mass fraction (wt%) of catalyst shared by mark 10 expression Mn element.
The MnOx/HNTs catalyst that embodiment 1-4 prepares is carried out SCR denitration active testing, method of testing
As follows:
Catalyst denitration activity evaluation is carried out in atmospheric fixed bed reactor, electric tube furnace heat.Simulation
Flue gas consists of 600ppmNH3, 600ppmNO and 3%O2, overall flow rate is 350mL/min, air speed 36000h-1。
Reaction temperature interval is 60 DEG C-300 DEG C.Import and export NO concentration to be recorded by Testo350-XL type flue gas analyzer.
The catalysis activity index of catalyst uses NO conversion ratio XNO to weigh, as shown in formula (1):
XNO=([NO]in-[NO]out)/[NO]in× 100% (1)
Wherein, [NO] in, [NO] out represent the inlet and outlet concentration of NO respectively.
Above content is only citing made for the present invention and explanation, affiliated those skilled in the art
Described specific embodiment is made various amendment or supplements or use similar mode to substitute, as long as
Without departing from invention method or surmount scope defined in the claims, the guarantor of the present invention all should be belonged to
Protect scope.
Claims (5)
1. the low temperature SCR denitration catalyst with galapectite as carrier, it is characterised in that described catalyst
With galapectite as carrier, with MnOx as major catalyst, using in situ synthesis to prepare, major catalyst is at low temperature
Mass percent in SCR denitration is 2-12%.
A kind of low temperature SCR denitration catalyst with galapectite as carrier the most according to claim 1, its
Being characterised by, described wherein MnOx is MnO2、Mn3O4And Mn2O3In one or more arbitrary proportions
Mixture.
A kind of low temperature SCR denitration catalyst with galapectite as carrier, it is special
Levy and be, use in situ synthesis to prepare, comprise the following steps:
1) preparation of galapectite: galapectite is sieved, takes 200-400 mesh；
2) load of catalyst: galapectite is immersed in the manganese acetate solution that concentration is 5-35wt%, stirring
Uniformly, left at room temperature 24h, then add potassium permanganate solution oxidized activating 4-10h, finally spend from
Sub-water washing sucking filtration, then at 110 DEG C of dry 12h, grinds screening, takes 20-40 mesh, obtain low-temperature SCR
Catalyst.
The most according to claim 3, the low temperature SCR denitration catalyst with galapectite as carrier, its feature exists
In, described galapectite is 1g/mL with the solid-liquid ratio of manganese acetate aqueous solution.
The most according to claim 3, the low temperature SCR denitration catalyst with galapectite as carrier, its feature exists
In, in described step 2, manganese acetate and potassium permanganate mol ratio are 2:3.
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| CN201610044837.5A CN105709720A (en) | 2016-01-22 | 2016-01-22 | Low-temperature SCR denitration catalyst using halloysite as carrier |
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Cited By (11)
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| 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 |
| CN108355662A (en) * | 2018-01-17 | 2018-08-03 | 上海大学 | The preparation method of nickel load galapectite methylmethane dry reforming catalyst |
| CN109173984A (en) * | 2018-08-14 | 2019-01-11 | 华南理工大学 | A method of Pb In Exhausted Water is removed using composite material |
| CN109317136A (en) * | 2018-09-17 | 2019-02-12 | 合肥工业大学 | A kind of low temperature SCR catalyst and preparation method thereof |
| CN109317138A (en) * | 2018-09-17 | 2019-02-12 | 合肥工业大学 | A kind of low-temperature SCR catalyst with halloysite/carbon as carrier and preparation method thereof |
| CN109453758A (en) * | 2018-10-31 | 2019-03-12 | 福建工程学院 | A kind of denitrating catalyst and preparation method thereof |
| CN110721674A (en) * | 2019-09-26 | 2020-01-24 | 合肥工业大学 | Manganese-based montmorillonite low-temperature SCR catalyst and preparation method thereof |
| CN110773153A (en) * | 2019-11-08 | 2020-02-11 | 四川大学 | A supported manganese-based medium and low temperature denitration catalyst, preparation method and application thereof |
| CN115487864A (en) * | 2022-05-31 | 2022-12-20 | 济南大学 | Catalytic GOx @ Fe-MOF @ HNTs tubular micro-nano motor and preparation method and application thereof |
| CN116637636A (en) * | 2023-05-24 | 2023-08-25 | 中国石油化工股份有限公司 | Method for preparing manganese-based low-temperature SCR catalyst by using waste FCC catalyst |
| CN116943636A (en) * | 2023-07-31 | 2023-10-27 | 合肥工业大学 | Method for shaping and preparing waste FCC-loaded manganese oxide columnar low-temperature SCR denitration catalyst |
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| CN116943636A (en) * | 2023-07-31 | 2023-10-27 | 合肥工业大学 | Method for shaping and preparing waste FCC-loaded manganese oxide columnar low-temperature SCR denitration catalyst |
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