CN108636401A - A kind of novel Mn, Ce codope ZrO2Aeroge low-temperature denitration catalyst - Google Patents
A kind of novel Mn, Ce codope ZrO2Aeroge low-temperature denitration catalyst Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 60
- 229910052684 Cerium Inorganic materials 0.000 title claims abstract description 16
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011572 manganese Substances 0.000 claims abstract description 19
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 15
- 235000019441 ethanol Nutrition 0.000 claims abstract description 15
- 239000004964 aerogel Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 239000000701 coagulant Substances 0.000 claims abstract description 3
- 229910002651 NO3 Inorganic materials 0.000 claims abstract 2
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000007654 immersion Methods 0.000 claims description 8
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 7
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 3
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 2
- 235000011194 food seasoning agent Nutrition 0.000 claims description 2
- BZDIAFGKSAYYFC-UHFFFAOYSA-N manganese;hydrate Chemical compound O.[Mn] BZDIAFGKSAYYFC-UHFFFAOYSA-N 0.000 claims description 2
- UJVRJBAUJYZFIX-UHFFFAOYSA-N nitric acid;oxozirconium Chemical compound [Zr]=O.O[N+]([O-])=O.O[N+]([O-])=O UJVRJBAUJYZFIX-UHFFFAOYSA-N 0.000 claims description 2
- 229910021645 metal ion Inorganic materials 0.000 claims 2
- 229910002492 Ce(NO3)3·6H2O Inorganic materials 0.000 claims 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(II) nitrate Inorganic materials [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 229910000420 cerium oxide Inorganic materials 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 abstract description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000000499 gel Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000006555 catalytic reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000007605 air drying Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 150000003948 formamides Chemical class 0.000 description 3
- 239000000017 hydrogel Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910001960 metal nitrate Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004967 Metal oxide aerogel Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 150000004703 alkoxides Chemical class 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000000352 supercritical drying Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241001597008 Nomeidae Species 0.000 description 1
- WYCDUUBJSAUXFS-UHFFFAOYSA-N [Mn].[Ce] Chemical compound [Mn].[Ce] WYCDUUBJSAUXFS-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 210000000720 eyelash Anatomy 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- B01J35/23—
-
- 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
- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
-
- B01J35/615—
-
- B01J35/643—
-
- B01J35/647—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Abstract
The invention discloses a kind of novel Mn, Ce codope ZrO2Aeroge low-temperature denitration catalyst.The catalyst is using zirconium oxide as carrier, is a kind of mesoporous and micropore and the low-temperature denitration catalyst with aerogel structure deposited, specific surface area is 350~500m using 5%~20% manganese oxide as active component using 5%~20% cerium oxide as catalyst aid2·g‑1, pore-size distribution is 1~50nm.Mn, Ce codope ZrO2Aeroge low-temperature denitration catalyst is dissolved in using nitrate as raw material in certain proportion alcohol solution, and coagulant is added and drying control agent stirs evenly, then water-bath forms gel under certain temperature；Gel stripping and slicing is placed in absolute ethyl alcohol and obtains alcogel, and dries to constant weight obtain catalyst in an oven.Novel Mn, Ce codope ZrO2Aeroge low-temperature denitration catalyst has many advantages, such as that at low cost, denitration efficiency is high and resistance to SO_2 is strong, and instrument and equipment needed for preparation are simple, are easy to industrialized production.
Description
Technical field
The invention belongs to catalysis techniques and field of environment protection, and in particular to a kind of novel Mn, Ce codope ZrO2Airsetting
Glue low-temperature denitration catalyst.
Technical background
It is reported that, nitrogen oxides is the one of the major reasons to form haze weather in recent years.To ecological environment and people
Body health causes huge harm.Discharge capacity by the end of China's nitrogen oxides in 2012 has become the first in the world, reaches
21940000 t.The year two thousand twenty is expected, the discharge capacity of nitrogen oxides is up to 30,000,000 t.The emission reduction of control nitrogen oxides has been compeled in eyebrow
Eyelash becomes the vital task of coming years air contaminant treatment.Have been carried out at present industrialized denitration technology mainly use with
NH3For the selective catalytic reduction (NH of reducing agent3- SCR) denitration technology, catalyst is the core of the technology.It is commercialized
Catalyst is with V2O5-WO3/TiO2Based on high temperature SCR denitration, the catalyst operating temperature is higher, easily by extraneous ring
Border influences, and causes catalyst efficiency to reduce, the lost of life.Therefore, low temperature, efficient NH are studied3SCR denitration becomes
Hot spot.At present using manganese cerium as the NH of main active component3SCR catalyst because the various special electronic configuration structures of the two and
The synergistic effect of the two makes the catalyst series show good low-temperature catalyzed performance.Manganese cerium is main active component
NH3SCR catalyst is mainly loaded to active component on carrier using sol impregnation method, often there is not strong for load solid, activity
The problems such as component specific surface area is low, and pore structure is unfavorable for the mass transport process during catalyst reacts gas absorption and catalysis, to
Limiting catalyst catalytic activity improves, and reduces the service life.
Aeroge is also known as xerogel, after gel drying, remains pore passage structure to greatest extent, can generate a kind of density
Extremely low solid matter.In the thirties in last century, aeroge is synthetically prepared first by Kistler.Aeroge is due to high ratio
The features such as area, high porosity and various sizes of pore-size distribution, is widely used in catalyst and catalyst carrier, heat-insulated material
The fields such as material, filtering material, acoustic impedance coupling material.
The method of metal oxide aerogel is prepared generally using metal alkoxide as raw material, is prepared using sol-gel method
After metal alcogel, metal oxide aerogel is prepared finally by supercritical drying.But it in above-mentioned preparation method, deposits
It is expensive in metal alkoxide, it is not easy to store, the shortcomings of supercritical drying is cumbersome, and there are certain risks.In recent years
Come, using metal nitrate as raw material, using propylene oxide as network derivant, and is prepared by the way of constant pressure and dry
ZrO2、Al2O3Equal Multimetal oxides aerogel material.The preparation process of aeroge is simplified with constant pressure and dry method,
Manufacturing cost is reduced, the commercial application of aeroge will be greatly facilitated.The present invention is directed to current NH3SCR catalyst compares table
The problems such as area is relatively low, and pore structure is undesirable proposes a kind of Mn, Ce codope ZrO with high-specific surface area and high porosity2
Aeroge low-temperature denitration catalyst, which can provide a large amount of active site for catalysis reaction, while improve to anti-
The absorption property for answering gas provides advantageous guarantee for catalyst activity.The catalyst is original with cheap metal nitrate
Material is prepared using improved simple atmosphere pressure desiccation, reduces the manufacturing cost of catalyst, has industrial prospect.
Invention content
The object of the present invention is to be got well the invention discloses a kind of inexpensive, efficient, resistance to SO_2 and be suitable for industrial enterprise
Novel Mn, Ce codope ZrO of flue gas2Aeroge low-temperature denitration catalyst, the catalyst are mesoporous one kind and micropore and deposit
Have aerogel structure low-temperature denitration catalyst.The aerogel structure low-temperature denitration catalyst specific surface area be 350~
500m2·g-1, pore-size distribution is 1~50nm.The aerogel structure low-temperature denitration catalyst be using zirconium oxide as carrier, with
5%~20% cerium oxide is catalyst aid, using 5%~20% manganese oxide as active component.The aerogel structure low-temperature denitration
Catalyst preparation includes the following steps：
(1) it is placed in reaction vessel with a certain proportion of alcohol solution；
(2) soluble zirconyl nitrate, four water manganese nitrates, cerous nitrate are added according to proportioning in reaction vessel and stir 40~60min,
To abundant dissolving；
(3) a certain amount of propylene oxide is added as gel coagulant, appropriate formamide is added and controls addition as chemical seasoning
20~30min is stirred in agent；
(4) above-mentioned solution is placed in 1~3h in 60~80 DEG C of water-baths；
(5) gained gel stripping and slicing is placed on 20~50h of immersion in absolute ethyl alcohol；
(6) gained alcogel is dried in 40~60 DEG C of baking ovens to constant weight, obtains novel Mn, Ce codope ZrO2Aeroge low temperature
Denitrating catalyst.
The advantages of the present invention：
(1) present invention firstly provides by Mn, Ce codope ZrO2Aeroge has gas as low-temperature denitration catalyst, the catalyst
Gel pore structure, specific surface area are high, pore structure be conducive to catalyst in the absorption of gas and catalysis reaction mass transport process into
Row.
(2) catalyst disclosed by the invention is with ZrO2Aeroge is catalyst carrier, and the Ce of doping is catalyst aid, and Mn is activity
Component, low-temperature denitration is efficient, and resistance to SO_2 is good, and catalyst life is long.
(3) catalyst disclosed by the invention is prepared with improved atmosphere pressure desiccation, is had using cheap metal nitrate as raw material
Low cost, operating procedure are simple, the characteristics of being easy to industrialized production.
Description of the drawings
Fig. 1 is that embodiment 1 obtains the N of catalyst A2The pore-size distribution of adsorption-desorption isothermal and catalyst A.
Fig. 2 is XRD diffracting spectrums of the catalyst A of embodiment 1 after 500 DEG C of calcinings.
Fig. 3 is the stereoscan photograph of the catalyst A of embodiment 1.
Specific implementation mode
With reference to embodiment, the present invention will be further described, but is not limited to protection scope of the present invention：
Embodiment 1：
50ml alcohol water is measured than being placed in beaker for 3 alcohol solution, by the Zr (NO of 0.0135mol3)4·5H2O with
Ce (the NO of 0.0015mol3)3·6H2O is dissolved in above-mentioned solution, and stirring 30min obtains clear solution.Successively add in above-mentioned solution
Enter 12ml propylene oxide and 0.9ml formamides and continues to stir 30min.Then sample is subjected to gel in 70 DEG C of water baths
Change and be aged 2.5h.Stripping and slicing is carried out to the alcohol hydrogel of formation and carries out immersion 48h in 60 DEG C of water baths with absolute ethyl alcohol,
Finally by the forced air drying at 40 DEG C of baking oven of the gel after immersion, you can obtain Monolithic aerogel denitrating catalyst A, specific surface
Product reaches 442.16m2·g-1.When denitration reaction temperature is 150 DEG C, the denitration efficiency of catalyst A has reached 85%.
Embodiment 2：
50ml alcohol water is measured than being placed in beaker for 2.5 alcohol solution, by the Zr (NO of 0.012mol3)4·5H2O、
Mn (the NO of 0.0015mol3)2·4H2Ce (the NO of O and 0.0015mol3)3·6H2O is dissolved in above-mentioned solution, and stirring 30min is extremely
Clear solution.10.6ml propylene oxide and 0.6ml formamides are successively added in above-mentioned solution and continues to stir 30min.Then
Sample is subjected to gelation and ageing process 3h in 65 DEG C of water baths.Stripping and slicing is carried out to the alcohol hydrogel of formation and with anhydrous
Ethyl alcohol carries out immersion 35h in 60 DEG C of water baths, finally by the forced air drying at 50 DEG C of baking oven of the gel after immersion, you can
To Monolithic aerogel denitrating catalyst B, specific surface area reaches 402.31m2·g-1.When denitration reaction temperature is 150 DEG C, catalysis
The denitration efficiency of agent B has reached 90%.
Embodiment 3：
50ml alcohol water is measured than being placed in beaker for 2.8 alcohol solution, by the Zr (NO of 0.0115mol3)4·5H2O、
Mn (the NO of 0.002mol3)2·4H2Ce (the NO of O and 0.0015mol3)3·6H2O is dissolved in above-mentioned solution, and stirring 30min is extremely
Clear solution.12.0ml propylene oxide and 1.0ml formamides are successively added in above-mentioned solution and continues to stir 30min.Then
Sample is subjected to gelation and ageing process 3h in 70 DEG C of water baths.Stripping and slicing is carried out to the alcohol hydrogel of formation and with anhydrous
Ethyl alcohol carries out immersion 40h in 60 DEG C of water baths, an absolute ethyl alcohol is during which replaced, finally by the gel after immersion in baking oven
Forced air drying at 55 DEG C, you can obtain Monolithic aerogel denitrating catalyst B, specific surface area reaches 402.31m2·g-1.Work as denitration
When reaction temperature is 150 DEG C, the denitration efficiency of catalyst B has reached 95%.
Denitration test condition：
Denitration activity test reaction operating mode：Catalyst space velocities (NO)=(NH3)=0.05%, (O2)=5%, air speed ratio=
30000/h, Balance Air use purity for 99.99% nitrogen.
The denitration activity of catalyst is characterized by conversion ratio, and conversion ratio η is calculated according to the following formula：
η=(NOX imports- NOX is exported)/NOX imports× 100%
In formula：NOX importsFor Reactor inlet NOxConcentration, NOX is exportedTo export NOxConcentration.
NOx=NO+NO2。
Applicant states that the foregoing is merely the specific implementation modes of the present invention, but protection scope of the present invention is not limited to
This, person of ordinary skill in the field it will be clearly understood that it is any belong to those skilled in the art the invention discloses
In technical scope, the change or replacement that can be readily occurred in are all fallen within protection scope of the present invention and the open scope.
Claims (5)
1. a kind of novel Mn, Ce codope ZrO2Aeroge low-temperature denitration catalyst, it is characterised in that be a kind of mesoporous and micropore simultaneously
The low-temperature denitration catalyst with aerogel structure deposited, specific surface area are 350~500m2·g-1, pore-size distribution be 1~
50nm。
2. a kind of novel Mn, Ce codope ZrO2Aeroge low-temperature denitration catalyst, which is characterized in that predecessor used is Zr
(NO3)4·5H2O、Mn(NO3)2·4H2O、Ce(NO3)3·6H2O, three's chemical composition are 1~1.5 in mass ratio:0.05~
0.20:0.08~0.34.
3. a kind of novel Mn, Ce codope ZrO2Aeroge low-temperature denitration catalyst, which is characterized in that with ZrO2Aeroge is to urge
The Ce of agent carrier, doping 5%~20% is catalyst aid, and the Mn of doping 5%~20% is active component.
4. according to claim 1,2 and 3, a kind of novel Mn, Ce codope ZrO2The preparation of aeroge low-temperature denitration catalyst
Method, which is characterized in that include the following steps：
(1) it is placed in reaction vessel with a certain proportion of alcohol solution；
(2) soluble zirconyl nitrate, four water manganese nitrates, cerous nitrate are added according to proportioning in reaction vessel and stir 40~60min,
To abundant dissolving；
(3) a certain amount of propylene oxide is added as gel coagulant, appropriate formamide is added and controls addition as chemical seasoning
20~30min is stirred in agent；
(4) above-mentioned solution is placed in 1~3h in 60~80 DEG C of water-baths；
(5) gained gel stripping and slicing is placed on 20~50h of immersion in absolute ethyl alcohol；
(6) gained alcogel is dried in 40~60 DEG C of baking ovens to constant weight, obtains novel Mn, Ce codope ZrO2Aeroge low temperature
Denitrating catalyst.
5. preparation method according to claim 4, it is characterised in that alcohol solution ratio is 1~3；Propylene oxide and metal
Ion molar ratio is 1~15；Formamide is 1~3 with metal ion molar ratio.
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| CN201810394288.3A CN108636401B (en) | 2018-04-27 | 2018-04-27 | Novel Mn and Ce co-doped ZrO2Aerogel low-temperature denitration catalyst |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967069A (en) * | 2019-05-05 | 2019-07-05 | 天津中材工程研究中心有限公司 | A kind of low-temperature SCR catalyst and preparation method thereof for cement kiln flue gas denitration |
| CN111346678A (en) * | 2020-03-30 | 2020-06-30 | 安徽元琛环保科技股份有限公司 | Preparation method of denitration catalyst with aerogel as carrier and prepared catalyst |
| CN114870849A (en) * | 2022-03-31 | 2022-08-09 | 南京工业大学 | Composite oxide aerogel catalytic material and preparation method and application thereof |
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| CN1724146A (en) * | 2005-07-13 | 2006-01-25 | 北京化工大学 | Preparation for load type nano composite photocatalyst for catalyzing oxidizing degrading organism under sun lighting |
| EP2119671A1 (en) * | 2008-05-14 | 2009-11-18 | Erik Elm Svensson | Preparation of hexaaluminate |
| CN103011280A (en) * | 2012-11-27 | 2013-04-03 | 天津大学 | Preparation method of zirconium oxide aerogel |
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