CN115814843A - Alkali-resistant metal plate-type denitration catalyst and preparation method thereof - Google Patents
Alkali-resistant metal plate-type denitration catalyst and preparation method thereof Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 45
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- 239000003513 alkali Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 40
- 239000008367 deionised water Substances 0.000 claims abstract description 39
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000001035 drying Methods 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 25
- 239000011230 binding agent Substances 0.000 claims abstract description 24
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 22
- 239000002808 molecular sieve Substances 0.000 claims abstract description 19
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 14
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims abstract description 13
- 238000001354 calcination Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000006228 supernatant Substances 0.000 claims abstract description 12
- 239000000725 suspension Substances 0.000 claims abstract description 12
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 11
- 239000012266 salt solution Substances 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 9
- 239000012670 alkaline solution Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 239000011259 mixed solution Substances 0.000 claims abstract description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 9
- 239000012752 auxiliary agent Substances 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 2
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims description 2
- 229960000892 attapulgite Drugs 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 claims description 2
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims description 2
- 229910001981 cobalt nitrate Inorganic materials 0.000 claims description 2
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 2
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims description 2
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052625 palygorskite Inorganic materials 0.000 claims description 2
- 239000001632 sodium acetate Substances 0.000 claims description 2
- 235000017281 sodium acetate Nutrition 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 0.000 claims 1
- 235000012211 aluminium silicate Nutrition 0.000 claims 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 claims 1
- 206010027439 Metal poisoning Diseases 0.000 abstract description 3
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 238000009210 therapy by ultrasound Methods 0.000 description 7
- 229940011182 cobalt acetate Drugs 0.000 description 6
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 6
- 229940071125 manganese acetate Drugs 0.000 description 5
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
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- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 2
- 206010008428 Chemical poisoning Diseases 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
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Abstract
The invention relates to the technical field of selective catalytic reduction catalysts, in particular to an alkali metal resistant plate-type denitration catalyst and a preparation method thereof, wherein the alkali metal resistant plate-type denitration catalyst comprises the following steps: s1, adding a molecular sieve into deionized water, adding a metal salt solution after ultrasonic dispersion treatment, and uniformly stirring; s2, adding an alkaline solution into the mixed solution obtained in the step S1, and placing the solution in a hydrothermal synthesis kettle for hydrothermal synthesis reaction; s3, cooling to room temperature after the reaction in the step S2 is finished, pouring out supernatant, carrying out centrifugal separation on the remaining suspension by using a solvent, and drying to obtain powder; s4, drying the powder obtained in the step S3 and TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, and extruding, drying and calcining to obtain the alkali-resistant metal plate type denitration catalyst. The catalyst prepared by the preparation method disclosed by the invention has high alkali metal denitration activity and strong alkali metal poisoning resistance.
Description
Technical Field
The invention relates to the technical field of selective catalytic reduction catalysts, in particular to an alkali metal resistant plate-type denitration catalyst and a preparation method thereof.
Background
Nitrogen Oxides (NO) X ) As one of the main pollutants in the atmosphere at present, the NO is carried out due to the influence of the environmental ecosystem and the human health, namely the main reasons of causing the environmental problems of acid rain, ozone layer cavities, photochemical smog and the like X The pollution source treatment has very important practical significance.
Selective Catalytic Reduction (SCR) denitration catalyst is the most effective denitration technology at present, and the vanadium-titanium catalyst is taken as the main NO X The treatment means is nearly mature, however, the vanadium-titanium catalyst in the industries of cement, glass, steel and the like in the non-electric industry cannot achieve very ideal effect due to the defects of weak alkali metal resistance and the like. Therefore, the development of a catalyst with alkali metal resistance is a strategic development direction for the wide application of SCR denitration in non-electric industries.
Disclosure of Invention
The alkali metal plate-type denitration catalyst prepared by the preparation method has high alkali metal denitration activity and strong alkali metal poisoning resistance.
In one aspect of the invention, the preparation method of the alkali-resistant plate-type denitration catalyst comprises the following steps:
s1, adding a molecular sieve into deionized water, adding a metal salt solution after ultrasonic dispersion treatment, and uniformly stirring;
s2, adding an alkaline solution into the mixed solution obtained in the step S1, and placing the solution in a hydrothermal synthesis kettle for hydrothermal synthesis reaction;
s3, cooling to room temperature after the reaction in the step S2 is finished, pouring out supernatant, carrying out centrifugal separation on the remaining suspension by using a solvent, and drying to obtain powder;
s4, drying the powder obtained in the step S3 and TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, and extruding, drying and calcining to obtain the alkali-resistant metal plate type denitration catalyst.
Preferably, the molecular sieve described in step S1 comprises: 10X molecular sieve, ZSM-5 molecular sieve.
Preferably, the metal salt solution in step S1 includes: one or more of cobalt nitrate, copper nitrate and manganese nitrate.
Preferably, the solid-liquid mass ratio of the molecular sieve to the metal salt solution in step S1 is 1 (20-80).
Preferably, the stirring method in step S1 is either magnetic stirring or paddle stirring.
In one embodiment, step S1 comprises: adding a molecular sieve into deionized water, performing ultrasonic dispersion for 1 hour, mixing with 0.05-1 mol/L metal salt solution, and stirring for 1 hour at 60-80 ℃.
Preferably, the alkaline solution in step S2 is one or more of potassium hydroxide, sodium acetate and urea.
Preferably, the mass ratio of the alkaline solution in the step S2 to the metal salt solution in the step S1 is 1.
In one embodiment, step S2 comprises: adding 0.2-2 mol/L alkaline solution into the mixed solution obtained in the step S1, placing the solution into a hydrothermal synthesis kettle, and carrying out hydrothermal synthesis for 12-48h at the temperature of 120-180 ℃.
Preferably, the solvent in step S3 is any one of deionized water, ethanol, ethylene glycol and glycerol.
Preferably, the drying temperature in step S3 is 80 ℃.
In one embodiment, step S3 comprises: and (3) cooling to room temperature after the reaction in the step (S2) is finished, pouring out supernatant liquid, centrifuging the rest suspension liquid by using a solvent, and drying at 80 ℃ to obtain powder.
Preferably, the binder in step S4 is one or more of attapulgite, pottery clay and pseudo-boehmite; the forming auxiliary agent is one or more of hydroxymethyl cellulose and hydroxypropyl cellulose.
Preferably, the paste material in step S4 includes, by mass: 20% powder, 60% TiO 2 10% of deionized water, 6% of binder and 4% of forming aid.
In one embodiment, step S4 includes: mixing the powder dried in the step S3 with TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, extruding, drying, and calcining at 400-600 ℃ for 3-12 h to prepare the alkali-resistant metal plate type denitration catalyst.
In another aspect of the invention, the alkali-resistant plate-type denitration catalyst prepared by the preparation method is provided.
Has the beneficial effects that:
(1) The alkali-resistant metal plate-type denitration catalyst is synthesized by a hydrothermal synthesis method, and the catalyst has higher catalytic activity under the alkali metal resistance;
(2) According to the invention, the molecular sieve is used as a carrier, so that the specific surface area and the pore volume of the catalyst carrier are improved, and the adsorption capacity of the catalyst on harmful elements such as alkaline metals, heavy metals and the like is improved, so that the anti-poisoning performance of the plate-type denitration catalyst is improved;
(3) The technology of the invention has simple integral process and low cost, and the prepared plate-type denitration catalyst has high denitration performance and excellent mechanical property and chemical poisoning resistance. The catalyst has strong industrial applicability, and is not only suitable for coal-fired power plants, but also suitable for denitration treatment in non-electric industries such as glass, cement and the like.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms also include the plural forms unless the context clearly dictates otherwise, and further, it is understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
1. Example 1
Adding a ZSM-5 molecular sieve into deionized water, performing ultrasonic treatment for 1h, mixing 0.05mol/L of cobalt acetate, copper nitrate (the molar ratio is 2; cooling to room temperature after the reaction is finished, pouring out supernatant, centrifugally separating the rest suspension by using deionized water as a solvent, drying at 80 ℃ to obtain powder, mixing with TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, extruding, drying, and calcining at 400 ℃ for 5 hours to obtain the alkali-resistant metal plate type denitration catalyst.
The paste comprises the following components in percentage by mass: 20 percent of powder and TiO 2 60% of deionized water, 10% of a binder and 4% of a forming aid.
2. Example 2
Adding a 10X molecular sieve into deionized water, performing ultrasonic treatment for 1h, mixing 0.5mol/L manganese acetate, copper nitrate (the molar ratio is 2; cooling to room temperature after the reaction is finished, pouring out supernatant, centrifugally separating the rest suspension with deionized water, drying at 80 deg.C, and mixing with TiO 2 Mixing, addingAdding deionized water, a binder and a forming assistant, uniformly mixing to form a paste, extruding, drying, and calcining at 500 ℃ for 6 hours to obtain the alkali-resistant metal plate type denitration catalyst.
The paste comprises the following components in percentage by mass: 20 percent of powder and TiO 2 60 percent, 10 percent of deionized water, 6 percent of binder and 4 percent of forming auxiliary agent.
3. Example 3
Adding a 10X molecular sieve into deionized water, performing ultrasonic treatment for 1h, mixing 1mol/L of cobalt acetate, copper nitrate and manganese acetate (the molar ratio is 1; cooling to room temperature after the reaction is finished, pouring out supernatant, centrifugally separating the rest suspension by using solvent ethanol, drying at 80 ℃ to obtain powder, mixing with TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, extruding, drying, and calcining at 500 ℃ for 3 hours to obtain the alkali-resistant metal plate type denitration catalyst.
The paste comprises the following components in percentage by mass: 20 percent of powder and TiO 2 60 percent, 10 percent of deionized water, 6 percent of binder and 4 percent of forming auxiliary agent.
4. Example 4
Adding a ZSM-5 molecular sieve into deionized water, performing ultrasonic treatment for 1h, mixing 1mol/L of cobalt acetate, copper nitrate, manganese acetate (molar ratio 2; cooling to room temperature after the reaction is finished, pouring out supernatant, centrifugally separating the rest suspension by using solvent ethanol, drying at 80 ℃ to obtain powder, mixing with TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, extruding, drying, and calcining at 450 ℃ for 6 hours to obtain the alkali-resistant metal plate type denitration catalyst.
The paste comprises the following components in percentage by mass: 20 percent of powder and TiO 2 60 percent, 10 percent of deionized water, 6 percent of binder and 4 percent of forming auxiliary agent.
5. Example 5
Subjecting 10X molecular sieveAdding the mixture into deionized water, performing ultrasonic treatment for 1h, mixing 1mol/L of cobalt acetate, copper nitrate, manganese acetate (the molar ratio is 1; cooling to room temperature after the reaction is finished, pouring out supernatant, centrifugally separating the rest suspension by using a solvent ethylene glycol, drying at 80 ℃ to obtain powder, mixing with TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, extruding, drying, and calcining at 550 ℃ for 8 hours to obtain the alkali-resistant metal plate type denitration catalyst.
The paste comprises the following components in percentage by mass: 20 percent of powder and TiO 2 60 percent, 10 percent of deionized water, 6 percent of binder and 4 percent of forming auxiliary agent.
6. Example 6
Adding a ZSM-5 molecular sieve into deionized water, performing ultrasonic treatment for 1h, mixing 1mol/L of cobalt acetate, copper nitrate, manganese acetate (molar ratio 3; cooling to room temperature after the reaction is finished, pouring out supernatant, centrifugally separating the rest suspension with solvent glycerol, drying at 80 ℃ to obtain powder, mixing with TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, extruding, drying, and calcining at 600 ℃ for 12 hours to obtain the alkali-resistant metal plate type denitration catalyst.
The paste comprises the following components in percentage by mass: 20 percent of powder and TiO 2 60 percent, 10 percent of deionized water, 6 percent of binder and 4 percent of forming auxiliary agent.
7. Comparative example 1
Adding a 10X molecular sieve into deionized water, performing ultrasonic treatment for 1h, putting the mixture into a hydrothermal synthesis kettle, and performing hydrothermal synthesis for 12h, wherein the temperature is maintained at 120 ℃; cooling to room temperature after the reaction is finished, pouring out supernatant, centrifugally separating the rest suspension by using solvent deionized water, drying at 80 ℃ to obtain powder, mixing with TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, extruding, drying, and calcining at 300 ℃ for 3 hours to obtain the plate-type denitration catalyst.
The paste comprises the following components in percentage by mass: 20 percent of powder and TiO 2 60% of deionized water, 10% of a binder and 4% of a forming aid.
8. Comparative example 2
1mol/L of cobalt acetate, copper nitrate (molar ratio is 3; cooling to room temperature after the reaction is finished, pouring out supernatant, centrifugally separating the rest suspension by using deionized water as a solvent, drying at 80 ℃ to obtain powder, mixing with TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, extruding, drying, and calcining at 400 ℃ for 3 hours to obtain the plate-type denitration catalyst.
The paste comprises the following components in percentage by mass: 20 percent of powder and TiO 2 60 percent, 10 percent of deionized water, 6 percent of binder and 4 percent of forming auxiliary agent.
9. Test of denitration Performance
The denitration performance test was performed on the denitration catalysts prepared in the above examples 1 to 6 and comparative examples 1 to 2. And (3) testing conditions are as follows: the test temperature is 260 ℃, 380 ℃ and NH 3 Concentration 500ppm NH 3 /NO＝1，SO 2 The concentration is 200ppm 2 The O concentration is 3 percent, and the space velocity GHSV =60000h of the reactor -1 。
The denitration efficiencies of the different catalysts are shown in table 1, and the results show that: compared with the comparative examples 1-2, the denitration catalysts prepared in the examples 1-6 have greatly improved alkali metal denitration resistance.
TABLE 1 denitration efficiency of different denitration catalysts
| Denitration efficiency at 260 ℃ (%) | Denitration efficiency at 380% | |
| Comparative example 1 | 9.2 | 24.2 |
| Comparative example 2 | 18.8 | 39.5 |
| Example 1 | 58.7 | 72.3 |
| Example 2 | 68.5 | 79.8 |
| Example 3 | 76.4 | 88.1 |
| Example 4 | 80.5 | 96.2 |
| Example 5 | 83.4 | 99.5 |
| Example 6 | 79.8 | 93.8 |
10. Experiment for simulating alkali metal poisoning resistance
The denitration catalysts prepared in the above examples 1 to 6 and comparative examples 1 to 2 were subjected to a simulated poisoning experiment, and loaded with 1% of K 2 And O, simulating a poisoning experiment, and loading by adopting a dipping method.
Testing catalyst loading 1% K 2 O, the denitration performance test conditions are the same as the denitration performance test, the test results are shown in Table 2, and the results show that: the denitration performance of the denitration catalyst prepared in the comparative example 1-2 is obviously reduced after simulated poisoning; in contrast, the denitration catalysts prepared in examples 1 to 6 exhibited only a small reduction in denitration performance, and exhibited excellent poisoning resistance.
TABLE 2 denitration efficiency of different denitration catalysts
| Denitration efficiency at 260 ℃ (%) | Denitration efficiency at 380% | |
| Comparative example 1 | 4.3 | 13.6 |
| Comparative example 2 | 16.8 | 21.2 |
| Example 1 | 46.3 | 59.4 |
| Example 2 | 57.5 | 71.0 |
| Example 3 | 62.5 | 80.1 |
| Example 4 | 72.4 | 90.3 |
| Example 5 | 80.4 | 94.1 |
| Example 6 | 68.7 | 80.3 |
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A preparation method of an alkali-resistant metal plate-type denitration catalyst is characterized by comprising the following steps:
s1, adding a molecular sieve into deionized water, adding a metal salt solution after ultrasonic dispersion treatment, and uniformly stirring;
s2, adding an alkaline solution into the mixed solution obtained in the step S1, and placing the solution in a hydrothermal synthesis kettle for hydrothermal synthesis reaction;
s3, cooling to room temperature after the reaction in the step S2 is finished, pouring out supernatant, carrying out centrifugal separation on the remaining suspension by using a solvent, and drying to obtain powder;
s4, drying the powder obtained in the step S3 and TiO 2 Mixing, adding deionized water, a binder and a forming aid, uniformly mixing to form a paste, and extruding, drying and calcining to obtain the alkali-resistant metal plate type denitration catalyst.
2. The method of claim 1, wherein the molecular sieve in step S1 comprises: 10X molecular sieve, ZSM-5 molecular sieve.
3. The method according to claim 1, wherein the metal salt solution in step S1 comprises: one or more of cobalt nitrate, copper nitrate and manganese nitrate.
4. The method according to claim 1, wherein the solid-liquid mass ratio of the molecular sieve to the metal salt solution in step S1 is 1 (20-80).
5. The method according to claim 1, wherein the alkaline solution in step S2 is one or more of potassium hydroxide, sodium acetate, and urea.
6. The method according to claim 1, wherein the mass ratio of the alkaline solution in step S2 to the metal salt solution in step S1 is 1.
7. The method according to claim 1, wherein the solvent in step S3 is any one of deionized water, ethanol, ethylene glycol, and glycerol.
8. The method according to claim 1, wherein the binder in step S4 is one or more of attapulgite, kaolin, and pseudoboehmite; the forming auxiliary agent is one or more of hydroxymethyl cellulose and hydroxypropyl cellulose.
9. The method according to claim 1, wherein the paste of step S4 comprises, in mass fraction: 20% powder, 60% TiO 2 10% of deionized water, 6% of binder and 4% of forming aid.
10. The alkali metal-resistant plate-type denitration catalyst prepared by the preparation method according to any one of claims 1 to 9.
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