CN118080021B - Ultralow-temperature denitration catalyst and application thereof - Google Patents
Ultralow-temperature denitration catalyst and application thereof Download PDFInfo
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- CN118080021B CN118080021B CN202410488568.6A CN202410488568A CN118080021B CN 118080021 B CN118080021 B CN 118080021B CN 202410488568 A CN202410488568 A CN 202410488568A CN 118080021 B CN118080021 B CN 118080021B
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- 239000003054 catalyst Substances 0.000 title claims abstract description 48
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000000440 bentonite Substances 0.000 claims abstract description 62
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 62
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 16
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- TYTHZVVGVFAQHF-UHFFFAOYSA-N manganese(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Mn+3].[Mn+3] TYTHZVVGVFAQHF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 16
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000000498 ball milling Methods 0.000 claims description 48
- OJMOMXZKOWKUTA-UHFFFAOYSA-N aluminum;borate Chemical compound [Al+3].[O-]B([O-])[O-] OJMOMXZKOWKUTA-UHFFFAOYSA-N 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 24
- 238000005406 washing Methods 0.000 claims description 24
- 238000002360 preparation method Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 19
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 claims description 15
- 229920001661 Chitosan Polymers 0.000 claims description 13
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 13
- 239000012286 potassium permanganate Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 claims description 9
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 claims description 9
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 7
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 7
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 7
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 7
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 7
- 239000000661 sodium alginate Substances 0.000 claims description 7
- 235000010413 sodium alginate Nutrition 0.000 claims description 7
- 229940005550 sodium alginate Drugs 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 11
- 230000004048 modification Effects 0.000 abstract description 9
- 238000012986 modification Methods 0.000 abstract description 9
- 230000002195 synergetic effect Effects 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 8
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 239000003607 modifier Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/32—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of manganese, technetium or rhenium
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- 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
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0027—Powdering
- B01J37/0036—Grinding
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/04—Mixing
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- B01J37/08—Heat treatment
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The invention relates to the technical field of catalysts, and particularly discloses an ultralow-temperature denitration catalyst which comprises the following raw materials in parts by weight: 10-15 parts of manganese dioxide, 10-15 parts of manganese sesquioxide, 10-15 parts of rare earth cerium, 8-14 parts of bentonite regulator and 25-30 parts of modification treatment liquid. The ultralow-temperature denitration catalyst adopts manganese dioxide, manganese trioxide and rare earth cerium as main agents, the low-temperature denitration efficiency of the product and the water resistance stability of the product are enhanced through the synergistic improvement of the bentonite regulator and the modified treatment fluid, the whisker-shaped structure is matched with the bentonite structure to enhance the surface contact surface of the catalyst and the stability of the catalyst, so that the modified treatment fluid and the bentonite regulator are further synergistic, and the performance of the product is further enhanced.
Description
Technical Field
The invention relates to the technical field of denitration catalysts, in particular to an ultralow-temperature denitration catalyst and application thereof.
Background
The SCR denitration catalyst has different choices according to different flue gas temperature conditions, and the existing ultra-high temperature denitration catalyst, high Wen Tuoxiao catalyst, medium-low temperature denitration catalyst, ultra-low temperature denitration catalyst which is firstly introduced by our company and the like in the market at present can meet the denitration catalysts in all temperature intervals.
The method has the advantages that the existing ultra-low temperature denitration catalyst is simple in raw materials, low in denitration efficiency, especially low in denitration efficiency, and meanwhile, the product is poor in hydrophobic and water-resistant properties, so that the denitration technology is limited, and based on the method, the method is further improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an ultralow-temperature denitration catalyst and application thereof, so as to solve the problems in the prior art.
The invention solves the technical problems by adopting the following technical scheme:
the invention provides an ultralow-temperature denitration catalyst which comprises the following raw materials in parts by weight:
10-15 parts of manganese dioxide, 10-15 parts of manganese sesquioxide, 8-14 parts of bentonite regulator and 25-30 parts of modification treatment liquid.
Preferably, the ultralow temperature denitration catalyst comprises the following raw materials in parts by weight:
12.5 parts of manganese dioxide, 12.5 parts of manganese sesquioxide, 11 parts of bentonite regulator and 27.5 parts of modified treatment fluid.
Preferably, the preparation method of the bentonite regulator comprises the following steps:
s01: uniformly stirring bentonite in a sufficient amount of potassium permanganate solution, washing with water, drying, and then placing in a proton irradiation box for irradiation treatment to obtain a bentonite pretreatment agent;
s02: adding 2-5 parts of yttrium nitrate solution and 1-3 parts of dodecylbenzene sulfonic acid into 4-7 parts of chitosan solution, then adding 2-5 parts of silane coupling agent KH560, and stirring thoroughly to obtain a regulator;
S03: ball milling the bentonite pretreatment agent and the regulator according to the weight ratio of 5:2, and after ball milling, washing and drying to obtain the bentonite regulator.
Preferably, the mass fraction of the potassium permanganate solution is 8-12%; the power of the proton irradiation is 350-400W, and the irradiation time is 1-2h.
Preferably, the yttrium nitrate solution has a mass fraction of 2-5%; the mass fraction of the chitosan solution is 4-7%.
Preferably, the ball milling speed of the ball milling treatment is 1000-1500r/min, and the ball milling is performed for 1-2h.
Preferably, the preparation method of the modified treatment fluid comprises the following steps:
S101: preheating aluminum borate whisker for 5-10min at 55-65 ℃, adding 4-7 parts of preheated aluminum borate whisker into 6-10 parts of sodium alginate solution with the mass fraction of 10%, adding 1-3 parts of nano silica sol and 2-5 parts of carboxymethyl cellulose, blending and ball milling, wherein the ball milling speed is 1000r/min, ball milling is finished for 1h, washing with water and drying to obtain an aluminum borate whisker agent;
s102: and (3) fully mixing the aluminum borate whisker agent and the sodium lignin sulfonate solution according to the weight ratio of 2:5 to obtain the modified treatment liquid.
Preferably, the mass fraction of the sodium lignin sulfonate solution is 10-15%.
Preferably, the preparation method of the catalyst comprises the following steps:
Fully mixing manganese dioxide, manganese sesquioxide, rare earth cerium, bentonite regulator and modified treatment liquid, and then washing and drying to obtain the ultralow-temperature denitration catalyst.
The invention also provides application of the ultralow-temperature denitration catalyst in desulfurization and denitration.
Compared with the prior art, the invention has the following beneficial effects:
According to the ultralow-temperature denitration catalyst disclosed by the invention, manganese dioxide, manganese trioxide and rare earth cerium are adopted as main agents, the low-temperature denitration efficiency of a product and the water resistance stability of the product are improved by the synergistic improvement of a bentonite regulator and a modification treatment liquid, meanwhile, the bentonite regulator is subjected to the treatment of potassium permanganate solution and proton irradiation by bentonite, the activity efficiency of the bentonite is optimized, meanwhile, the bentonite is regulated by the regulator obtained by matching yttrium nitrate solution, dodecylbenzene sulfonic acid, chitosan solution and a silane coupling agent KH560, the modification effect of the bentonite is enhanced by the mutual cooperation of raw materials in the regulator, the synergistic effect is enhanced, so that the low-temperature denitration and the water resistance stability of the product are optimized, the modification treatment liquid is matched with aluminum borate whisker, and the obtained improved body is matched with a sodium lignin sulfonate solution by the synergistic improvement of preheating, sodium alginate solution, nano silica sol and carboxymethyl cellulose blending ball milling treatment, the surface contact surface of the catalyst is enhanced by matching with a bentonite lamellar structure in a whisker shape, the stability of the catalyst is enhanced, and the further synergistic effect of the modification treatment liquid and the bentonite regulator is enhanced, and the performance of the product is further enhanced.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The ultralow-temperature denitration catalyst comprises the following raw materials in parts by weight:
10-15 parts of manganese dioxide, 10-15 parts of manganese sesquioxide, 10-15 parts of rare earth cerium, 8-14 parts of bentonite regulator and 25-30 parts of modification treatment liquid.
The ultralow-temperature denitration catalyst of the embodiment comprises the following raw materials in parts by weight:
12.5 parts of manganese dioxide, 12.5 parts of manganese sesquioxide, 12.5 parts of rare earth cerium, 11 parts of bentonite regulator and 27.5 parts of modification treatment liquid.
The preparation method of the bentonite regulator of the embodiment comprises the following steps:
s01: uniformly stirring bentonite in a sufficient amount of potassium permanganate solution, washing with water, drying, and then placing in a proton irradiation box for irradiation treatment to obtain a bentonite pretreatment agent;
s02: adding 2-5 parts of yttrium nitrate solution and 1-3 parts of dodecylbenzene sulfonic acid into 4-7 parts of chitosan solution, then adding 2-5 parts of silane coupling agent KH560, and stirring thoroughly to obtain a regulator;
S03: ball milling the bentonite pretreatment agent and the regulator according to the weight ratio of 5:2, and after ball milling, washing and drying to obtain the bentonite regulator.
The mass fraction of the potassium permanganate solution in the embodiment is 8-12%; the power of the proton irradiation is 350-400W, and the irradiation time is 1-2h.
The mass fraction of the yttrium nitrate solution in the embodiment is 2-5%; the mass fraction of the chitosan solution is 4-7%.
The ball milling speed of the ball milling treatment in the embodiment is 1000-1500r/min, and the ball milling is carried out for 1-2h.
The preparation method of the modified treatment liquid in the embodiment comprises the following steps:
S101: preheating aluminum borate whisker for 5-10min at 55-65 ℃, adding 4-7 parts of preheated aluminum borate whisker into 6-10 parts of sodium alginate solution with the mass fraction of 10%, adding 1-3 parts of nano silica sol and 2-5 parts of carboxymethyl cellulose, blending and ball milling, wherein the ball milling speed is 1000r/min, ball milling is finished for 1h, washing with water and drying to obtain an aluminum borate whisker agent;
s102: and (3) fully mixing the aluminum borate whisker agent and the sodium lignin sulfonate solution according to the weight ratio of 2:5 to obtain the modified treatment liquid.
The mass fraction of the sodium lignin sulfonate solution in the embodiment is 10-15%.
The preparation method of the catalyst of the embodiment comprises the following steps:
Fully mixing manganese dioxide, manganese sesquioxide, rare earth cerium, bentonite regulator and modified treatment liquid, and then washing and drying to obtain the ultralow-temperature denitration catalyst.
The application of the ultralow-temperature denitration catalyst in desulfurization and denitration is provided.
Example 1.
The ultralow-temperature denitration catalyst comprises the following raw materials in parts by weight:
10 parts of manganese dioxide, 10 parts of manganese sesquioxide, 10 parts of rare earth cerium, 8 parts of bentonite regulator and 25 parts of modified treatment fluid.
The preparation method of the bentonite regulator of the embodiment comprises the following steps:
s01: uniformly stirring bentonite in a sufficient amount of potassium permanganate solution, washing with water, drying, and then placing in a proton irradiation box for irradiation treatment to obtain a bentonite pretreatment agent;
S02: adding 2 parts of yttrium nitrate solution and 1 part of dodecylbenzene sulfonic acid into 4 parts of chitosan solution, then adding 2 parts of silane coupling agent KH560, and stirring thoroughly to obtain a regulator;
S03: ball milling the bentonite pretreatment agent and the regulator according to the weight ratio of 5:2, and after ball milling, washing and drying to obtain the bentonite regulator.
The mass fraction of the potassium permanganate solution in the embodiment is 8%; the power of proton irradiation is 350W, and the irradiation time is 1h.
The mass fraction of the yttrium nitrate solution in the embodiment is 2%; the mass fraction of the chitosan solution is 4%.
The ball milling speed of the ball milling treatment in this example was 1000r/min, and ball milling was carried out for 1 hour.
The preparation method of the modified treatment liquid in the embodiment comprises the following steps:
S101: preheating aluminum borate whisker at 55 ℃ for 5min, adding 4 parts of preheated aluminum borate whisker into 6 parts of sodium alginate solution with the mass fraction of 10%, adding 1 part of nano silica sol and 2 parts of carboxymethyl cellulose, carrying out blending ball milling treatment at the speed of 1000r/min, carrying out ball milling for 1h, washing with water and drying to obtain an aluminum borate whisker agent;
s102: and (3) fully mixing the aluminum borate whisker agent and the sodium lignin sulfonate solution according to the weight ratio of 2:5 to obtain the modified treatment liquid.
The mass fraction of the sodium lignin sulfonate solution of this example was 10%.
The preparation method of the catalyst of the embodiment comprises the following steps:
Fully mixing manganese dioxide, manganese sesquioxide, rare earth cerium, bentonite regulator and modified treatment liquid, and then washing and drying to obtain the ultralow-temperature denitration catalyst.
The application of the ultralow-temperature denitration catalyst in desulfurization and denitration is provided.
Example 2.
The ultralow-temperature denitration catalyst comprises the following raw materials in parts by weight:
15 parts of manganese dioxide, 15 parts of manganese sesquioxide, 15 parts of rare earth cerium, 14 parts of bentonite regulator and 30 parts of modified treatment fluid.
The preparation method of the bentonite regulator of the embodiment comprises the following steps:
s01: uniformly stirring bentonite in a sufficient amount of potassium permanganate solution, washing with water, drying, and then placing in a proton irradiation box for irradiation treatment to obtain a bentonite pretreatment agent;
S02: adding 5 parts of yttrium nitrate solution and 3 parts of dodecylbenzene sulfonic acid into 7 parts of chitosan solution, then adding 5 parts of silane coupling agent KH560, and stirring thoroughly to obtain a regulator;
S03: ball milling the bentonite pretreatment agent and the regulator according to the weight ratio of 5:2, and after ball milling, washing and drying to obtain the bentonite regulator.
The mass fraction of the potassium permanganate solution in the embodiment is 12%; the power of proton irradiation is 400W, and the irradiation is carried out for 2 hours.
The mass fraction of the yttrium nitrate solution in the embodiment is 5%; the mass fraction of the chitosan solution is 7%.
The ball milling speed of the ball milling treatment in this example was 1500r/min and the ball milling was carried out for 2 hours.
The preparation method of the modified treatment liquid in the embodiment comprises the following steps:
S101: preheating aluminum borate whisker for 0min at 65 ℃, adding 7 parts of preheated aluminum borate whisker into 10 parts of sodium alginate solution with the mass fraction of 10%, adding 3 parts of nano silica sol and 5 parts of carboxymethyl cellulose, carrying out blending ball milling treatment at the speed of 1000r/min, carrying out ball milling for 1h, washing with water and drying to obtain an aluminum borate whisker agent;
s102: and (3) fully mixing the aluminum borate whisker agent and the sodium lignin sulfonate solution according to the weight ratio of 2:5 to obtain the modified treatment liquid.
The mass fraction of the sodium lignin sulfonate solution of this example was 15%.
The preparation method of the catalyst of the embodiment comprises the following steps:
Fully mixing manganese dioxide, manganese sesquioxide, rare earth cerium, bentonite regulator and modified treatment liquid, and then washing and drying to obtain the ultralow-temperature denitration catalyst.
The application of the ultralow-temperature denitration catalyst in desulfurization and denitration is provided.
Example 3.
The ultralow-temperature denitration catalyst comprises the following raw materials in parts by weight:
12.5 parts of manganese dioxide, 12.5 parts of manganese sesquioxide, 12.5 parts of rare earth cerium, 11 parts of bentonite regulator and 27.5 parts of modification treatment liquid.
The preparation method of the bentonite regulator of the embodiment comprises the following steps:
s01: uniformly stirring bentonite in a sufficient amount of potassium permanganate solution, washing with water, drying, and then placing in a proton irradiation box for irradiation treatment to obtain a bentonite pretreatment agent;
s02: adding 3.5 parts of yttrium nitrate solution and 2 parts of dodecylbenzene sulfonic acid into 5.5 parts of chitosan solution, then adding 3.5 parts of silane coupling agent KH560, and stirring thoroughly to obtain a regulator;
S03: ball milling the bentonite pretreatment agent and the regulator according to the weight ratio of 5:2, and after ball milling, washing and drying to obtain the bentonite regulator.
The mass fraction of the potassium permanganate solution in the embodiment is 10%; the power of proton irradiation is 370W, and the irradiation time is 1.5h.
The mass fraction of the yttrium nitrate solution in the embodiment is 3.5%; the mass fraction of the chitosan solution is 5.5%.
The ball milling speed of the ball milling treatment in this example was 1250r/min and the ball milling was carried out for 1.5 hours.
The preparation method of the modified treatment liquid in the embodiment comprises the following steps:
S101: preheating aluminum borate whisker at 60 ℃ for 7.5min, adding 5.5 parts of preheated aluminum borate whisker into 8 parts of sodium alginate solution with the mass fraction of 10%, adding 2 parts of nano silica sol and 3.5 parts of carboxymethyl cellulose, carrying out blending ball milling treatment, wherein the ball milling speed is 1000r/min, carrying out ball milling for 1h, finishing ball milling, washing with water, and drying to obtain an aluminum borate whisker agent;
s102: and (3) fully mixing the aluminum borate whisker agent and the sodium lignin sulfonate solution according to the weight ratio of 2:5 to obtain the modified treatment liquid.
The mass fraction of the sodium lignin sulfonate solution of this example was 12.5%.
The preparation method of the catalyst of the embodiment comprises the following steps:
Fully mixing manganese dioxide, manganese sesquioxide, rare earth cerium, bentonite regulator and modified treatment liquid, and then washing and drying to obtain the ultralow-temperature denitration catalyst.
The application of the ultralow-temperature denitration catalyst in desulfurization and denitration is provided.
Comparative example 1.
The difference from example 3 is that the bentonite modifier is replaced by bentonite.
Comparative example 2.
The difference from example 3 is that the bentonite conditioner was prepared without conditioning.
Comparative example 3.
The difference from example 3 is that yttrium nitrate solution and dodecylbenzenesulfonic acid were not added in the preparation method of the regulator.
Comparative example 4.
The difference from example 3 is that no modifying treatment liquid was added.
Comparative example 5.
The difference from example 3 is that no aluminum borate whisker agent was added in the preparation of the modified treatment liquid.
Examples 1-3 and comparative examples 1-5 performance tests; the denitration rate test method comprises the following steps: introducing flue gas into a denitration device, wherein the denitration device is composed of an ultralow-temperature denitration catalyst of a test product, the concentration of NO before and after denitration is tested by a flue gas analyzer, the denitration efficiency= (concentration of NO before denitration-concentration of NO after denitration)/concentration of NO before denitration is multiplied by 100%, and the measurement results are shown in the following table 1, which is a test table of the denitration efficiency under the conventional condition;
TABLE 1
From examples 1-3 and comparative examples 1-5, the product of example 3 has remarkable denitration efficiency under low temperature condition and remarkable low temperature denitration stability effect.
Simultaneously placing the product under the humidity of 2% for 24 hours to obtain a test product, and referring to the denitration rate test method to obtain the water-resistant denitration efficiency under the humidity condition, wherein table 2 is a test table of the denitration efficiency under the water-resistant condition;
TABLE 2
The product of example 3 has excellent water-resistant stability, meanwhile, as can be seen from comparative examples 1-5, the bentonite modifier is replaced by bentonite, no modified treatment liquid is added, the performance stability of the product is obviously reduced, the bentonite modifier is not treated by the modifier, no yttrium nitrate solution, dodecylbenzenesulfonic acid or aluminum borate whisker agent is not added in the preparation of the modifier, the performance of the product is in a deterioration trend, and the performance effect of the product is most obvious by adopting the raw materials of the product obtained by the method.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. The ultra-low temperature denitration catalyst is characterized by comprising the following preparation methods:
fully mixing manganese dioxide, manganese sesquioxide, rare earth cerium, bentonite regulator and modified treatment liquid, washing with water, and drying to obtain an ultralow-temperature denitration catalyst;
10-15 parts of manganese dioxide, 10-15 parts of manganese sesquioxide, 10-15 parts of rare earth cerium, 8-14 parts of bentonite regulator and 25-30 parts of modified treatment fluid;
The preparation method of the bentonite regulator comprises the following steps:
s01: uniformly stirring bentonite in a sufficient amount of potassium permanganate solution, washing with water, drying, and then placing in a proton irradiation box for irradiation treatment to obtain a bentonite pretreatment agent;
s02: adding 2-5 parts of yttrium nitrate solution and 1-3 parts of dodecylbenzene sulfonic acid into 4-7 parts of chitosan solution, then adding 2-5 parts of silane coupling agent KH560, and stirring thoroughly to obtain a regulator;
S03: ball milling the bentonite pretreatment agent and the regulator according to the weight ratio of 5:2, finishing ball milling, washing with water, and drying to obtain the bentonite regulator;
The mass fraction of the potassium permanganate solution is 8-12%; the power of proton irradiation is 350-400W, and the irradiation time is 1-2h;
The mass fraction of the yttrium nitrate solution is 2-5%; the mass fraction of the chitosan solution is 4-7%;
the ball milling rotating speed of the ball milling treatment in the step S03 is 1000-1500r/min, and the ball milling is carried out for 1-2h;
The preparation method of the modified treatment fluid comprises the following steps:
S101: preheating aluminum borate whisker for 5-10min at 55-65 ℃, adding 4-7 parts of preheated aluminum borate whisker into 6-10 parts of sodium alginate solution with the mass fraction of 10%, then adding 1-3 parts of nano silica sol and 2-5 parts of carboxymethyl cellulose, carrying out blending ball milling treatment, wherein the ball milling speed is 1000r/min, ball milling is finished for 1h, washing with water, and drying to obtain an aluminum borate whisker agent;
S102: fully mixing an aluminum borate whisker agent and a sodium lignin sulfonate solution according to a weight ratio of 2:5 to obtain a modified treatment solution;
the mass fraction of the sodium lignin sulfonate solution is 10-15%.
2. The ultra-low temperature denitration catalyst according to claim 1, wherein the catalyst comprises, by weight, 12.5 parts of manganese dioxide, 12.5 parts of manganese sesquioxide, 12.5 parts of rare earth cerium, 11 parts of bentonite regulator and 27.5 parts of modified treatment liquid.
3. Use of the ultra-low temperature denitration catalyst as claimed in any one of claims 1 to 2 in denitration.
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| CN103433033A (en) * | 2013-07-25 | 2013-12-11 | 上海电力学院 | Low-temperature denitration catalyst MnOx-CeO2-TiO2-Al2O3, and preparation method and application thereof |
| CN104768643A (en) * | 2012-11-08 | 2015-07-08 | 揖斐电株式会社 | Honeycomb structure and manufacturing method thereof |
| CN105032403A (en) * | 2015-07-07 | 2015-11-11 | 四川大学 | Catalyst used for low temperature desulphurization and denitration of flue gas and preparation method thereof |
| CN115920618A (en) * | 2023-01-06 | 2023-04-07 | 广州绿华环保科技股份有限公司 | Composite type denitration agent and waste gas denitration method |
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| US8263032B2 (en) * | 2010-02-01 | 2012-09-11 | Johnson Matthey Public Limited Company | Oxidation catalyst |
| CN116655082B (en) * | 2023-06-29 | 2024-08-23 | 深圳市加美富实业有限公司 | Boric acid-enriched waste liquid treating agent and treating method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104768643A (en) * | 2012-11-08 | 2015-07-08 | 揖斐电株式会社 | Honeycomb structure and manufacturing method thereof |
| CN103433033A (en) * | 2013-07-25 | 2013-12-11 | 上海电力学院 | Low-temperature denitration catalyst MnOx-CeO2-TiO2-Al2O3, and preparation method and application thereof |
| CN105032403A (en) * | 2015-07-07 | 2015-11-11 | 四川大学 | Catalyst used for low temperature desulphurization and denitration of flue gas and preparation method thereof |
| CN115920618A (en) * | 2023-01-06 | 2023-04-07 | 广州绿华环保科技股份有限公司 | Composite type denitration agent and waste gas denitration method |
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