CN114950337A - Normal-temperature ammonia gas dry-type adsorption material and preparation method thereof - Google Patents
Normal-temperature ammonia gas dry-type adsorption material and preparation method thereof Download PDFInfo
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- CN114950337A CN114950337A CN202210353997.3A CN202210353997A CN114950337A CN 114950337 A CN114950337 A CN 114950337A CN 202210353997 A CN202210353997 A CN 202210353997A CN 114950337 A CN114950337 A CN 114950337A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 50
- 239000000463 material Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 230000032683 aging Effects 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002243 precursor Substances 0.000 claims abstract description 10
- 239000000376 reactant Substances 0.000 claims abstract description 10
- 238000001354 calcination Methods 0.000 claims abstract description 7
- 239000000701 coagulant Substances 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 239000002904 solvent Substances 0.000 claims abstract description 5
- 239000012213 gelatinous substance Substances 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 17
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 239000003463 adsorbent Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 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 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- 235000010413 sodium alginate Nutrition 0.000 claims description 6
- 239000000661 sodium alginate Substances 0.000 claims description 6
- 229940005550 sodium alginate Drugs 0.000 claims description 6
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 5
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 3
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000005554 pickling Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 5
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 238000006467 substitution reaction Methods 0.000 abstract description 3
- 238000010668 complexation reaction Methods 0.000 abstract description 2
- 239000000499 gel Substances 0.000 description 14
- 238000004887 air purification Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 239000011164 primary particle Substances 0.000 description 4
- 238000007605 air drying Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000012621 metal-organic framework Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 206010008479 Chest Pain Diseases 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 206010013952 Dysphonia Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 208000010496 Heart Arrest Diseases 0.000 description 1
- 208000010473 Hoarseness Diseases 0.000 description 1
- 206010038669 Respiratory arrest Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 150000001261 hydroxy acids Chemical class 0.000 description 1
- 230000000622 irritating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000013335 mesoporous material Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
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- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28026—Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin
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- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
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- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
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- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/305—Addition of material, later completely removed, e.g. as result of heat treatment, leaching or washing, e.g. for forming pores
- B01J20/3057—Use of a templating or imprinting material ; filling pores of a substrate or matrix followed by the removal of the substrate or matrix
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The invention discloses a normal-temperature ammonia dry adsorption material and a preparation method thereof, wherein the preparation method comprises the following steps: step one, mixing an aluminum source precursor, a template agent and a chloride reactant, adding a solvent, and stirring until the aluminum source precursor, the template agent and the chloride reactant are fully dissolved and dispersed to obtain a solution A; step two, adding a coagulant into the solution A to generate a gelatinous substance and a gel B; step three, aging, drying and grinding the gel B to obtain powder C; and step four, putting the powder C into a furnace body filled with atmosphere protective gas, calcining for 4-6 hours at 500-600 ℃, and drying after acid washing to obtain the normal-temperature ammonia dry adsorption material. The normal-temperature ammonia dry adsorption material provided by the invention adopts the principles of physical adsorption, acid-base neutralization, substitution addition and chemical complexation adsorption in combination, so that low-concentration ammonia in indoor air can be removed for a long time.
Description
Technical Field
The invention belongs to the technical field of indoor air purification, relates to an adsorption material, and particularly relates to a normal-temperature ammonia dry adsorption material and a preparation method thereof.
Background
Ammonia is a main pollution gas in indoor air, and the concrete contains urea as a main source of the antifreezing agent, so that serious harm is brought to human health after the antifreezing agent is exposed to the environment with over-standard ammonia concentration for a long time. The concentration of ammonia in the environment reaches 0.5-1.0 mg/m 3 The human body can feel. The ammonia is chemically active and forms explosive gases when the ammonia gas reaches 16.5 to 26.5 volume percent in air. In atmospheric environment, ammonia is very easily oxidized to form NO 3 - Or NOx.
The high water solubility and alkalescence of ammonia gas cause the ammonia gas to be harmful to the environment and seriously harm human health. Ammonia gas adheres to human skin tissue, absorbs water in the skin tissue, and destroys the structure of proteins, thereby destroying cells. Ammonia gas has corrosive and irritating effects on respiratory system, and when a large amount of ammonia gas is inhaled, symptoms such as cough, hoarseness, pharyngalgia, dyspnea, chest distress, headache, dizziness and the like can appear. Too high a concentration can also cause respiratory and cardiac arrest. The ammonia concentration in the environment reaches 553mg/m 3 In time, the human body has strong stimulation feeling, and under the environment, the human body can only bear 1.25 minutes; when people are in the ammonia gas concentration of 3500-7000 mg/m 3 Then, it will die immediately.
Common ammonia gas treatment methods include adsorption, absorption, biological, plasma, and the like. The adsorption method is to accumulate or concentrate one or more components in a gas or liquid mixture on the surface of an adsorbent by utilizing a porous solid adsorbent so as to achieve the purpose of separation. The adsorption capacity of the existing adsorbent is generally small, and the filter material needs to be replaced periodically, so that the cost is high, and therefore, the development of the adsorbent with large adsorption capacity and low price is a research hotspot at present.
At present, the method is used for purifying ammonia gas at home and abroadThe recycled adsorption materials mainly comprise zeolite, activated carbon, graphene oxide, alumina, silica gel, Metal Organic Framework (MOFs) materials, porous organic polymers and the like, and more NH can be derived by performing functional modification and design on the materials 3 A novel material with good adsorption performance and high stability.
Disclosure of Invention
The invention aims to overcome the defects of short service life, high cost and low efficiency of ammonia gas adsorbing materials in the prior art, and provides a dry ammonia gas adsorbing material which can remove low-concentration ammonia gas in indoor air for a long time by jointly adopting various principles of physical adsorption of mesoporous materials, acid-base neutralization of chloride active sites, substitution addition and chemical complexation adsorption at normal temperature and a preparation method thereof.
In order to achieve the above object, the present invention provides a method for preparing a normal-temperature dry-type ammonia gas adsorbent, which has the following characteristics: the method comprises the following steps:
step one, mixing an aluminum source precursor, a template agent and a chloride reactant, adding a solvent, and stirring until the aluminum source precursor, the template agent and the chloride reactant are fully dissolved and dispersed to obtain a solution A; the precursor of the aluminum source is one of aluminum nitrate, aluminum sulfate and aluminum chloride; the template agent is one of cetyl trimethyl ammonium bromide and polyethylene glycol; the chloride reactant is one or more of nickel chloride, copper chloride and cobalt chloride;
step two, adding a coagulant into the solution A to generate a gelatinous substance and a gel B; the coagulant is one of polyacrylamide and sodium alginate;
step three, aging, drying and grinding the gel B to obtain powder C;
and step four, putting the powder C into a furnace body filled with atmosphere protective gas, calcining for 4-6 hours at 500-600 ℃, and drying after acid washing to obtain the normal-temperature ammonia dry adsorption material.
The primary particle size of the normal-temperature ammonia gas dry-type adsorption material is 5-10 nm, and the normal-temperature ammonia gas dry-type adsorption material can be in a powder shape, can be prepared into particles or can be attached to non-woven fabrics for ammonia gas adsorption and filtration.
Further, the invention provides a preparation method of the normal-temperature ammonia gas dry-type adsorption material, which can also have the following characteristics: wherein the solvent is one or a mixture of absolute ethyl alcohol and deionized water.
Further, the invention provides a preparation method of the normal-temperature ammonia gas dry-type adsorption material, which can also have the following characteristics: the aluminum source precursor, the template agent, the chloride reactant and the coagulant are mixed in a mass part ratio of 20-30: 5-10 wt% to 5-10: 50-70.
Further, the invention provides a preparation method of the normal-temperature ammonia gas dry-type adsorption material, which can also have the following characteristics: in the third step, the aging temperature is 30-50 ℃, and the aging time is 24-72 hours.
Further, the invention provides a preparation method of the normal-temperature ammonia gas dry-type adsorption material, which can also have the following characteristics: wherein, in the third step, the drying temperature is 110 ℃.
Further, the present invention provides a method for preparing a normal temperature dry type ammonia gas adsorbent, which may further have the following characteristics: wherein, in the fourth step, the atmosphere protective gas is nitrogen or air.
Further, the invention provides a preparation method of the normal-temperature ammonia gas dry-type adsorption material, which can also have the following characteristics: wherein, in the fourth step, the acid used for pickling is 5 wt% of citric acid.
The invention also protects the normal-temperature ammonia dry adsorption material prepared by the preparation method.
The invention has the beneficial effects that:
the application provides a normal-temperature ammonia dry-type adsorption material and a preparation method thereof, and the ammonia adsorption material suitable for long-acting removal of low-concentration ammonia in indoor air is prepared by preferably selecting a proper ammonia complexing agent and a modification method of in-situ symbiosis with mesoporous alumina, and the application of the ammonia adsorption material in the existing air purification system is popularized, so that the indoor air quality is improved, and the ammonia adsorption material has remarkable economic benefit and social significance. Specifically, the method comprises the following steps:
firstly, the chlorides in the invention are particularly selected from nickel chloride, copper chloride, cobalt chloride and the like with high thermal stability, and can be fully mixed with mesoporous alumina in situ in the calcining process, and the active sites are uniformly distributed;
the primary particle size of the normal-temperature ammonia dry adsorption material prepared by the invention is 5-10 nm, compared with traditional porous materials such as activated carbon and molecular sieve, the structure order is high, and the porous structure can be fully utilized to realize long-acting adsorption of ammonia;
the normal-temperature ammonia dry adsorption material mainly comprises mesoporous alumina and in-situ chloride, and the surface of the adsorption material contains hydroxy acid active sites. The method adopts various principles of mesoporous alumina physical adsorption, substitution addition and complex adsorption of chloride and ammonia gas, and acid-base neutralization of acid sites and ammonia gas to realize efficient deep adsorption of low-concentration ammonia gas indoors.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with examples are further described below.
Example 1
The embodiment provides a normal-temperature ammonia dry adsorption material, and a preparation method thereof comprises the following steps:
step one, accurately weighing 20g of aluminum nitrate, 10g of polyethylene glycol, 5g of copper chloride and 5g of cobalt chloride respectively, slowly adding deionized water into a mixed system of the materials under a stirring state until the solute is fully dissolved and dispersed to obtain a solution A;
step two, taking 50g of sodium alginate, slowly adding the sodium alginate into the solution A while stirring, continuously stirring until a gel substance is generated, and stopping stirring to obtain a gel B;
aging the gel B for 48h at 40 ℃, then putting the gel B into a 110 ℃ forced air drying oven for full drying, and grinding to obtain powder C;
and step four, putting the ground powder into a furnace body with air atmosphere protection, calcining for 4 hours at 600 ℃, and washing and drying by using 5 wt% of citric acid to obtain the normal-temperature ammonia dry adsorption material.
The normal temperature ammonia gas dry adsorption materialThe minor particle size was about 8 nm. 500g of the normal-temperature ammonia dry adsorption material is filled in a honeycomb filter to obtain a normal-temperature ammonia removal filter, and the filter is placed at an air volume of 500m 3 In the air purification equipment of/h, the air purification equipment is 30m according to the GB/T18801- 3 The initial concentration of ammonia gas is 2.13mg/m in the test of the experimental chamber 3 The amount of clean ammonia (i.e., CADR value) was 389m 3 /h。
Example 2
The embodiment provides a normal-temperature ammonia dry adsorption material, and a preparation method thereof comprises the following steps:
step one, accurately weighing 30g of aluminum sulfate, 5g of polyethylene glycol and 5g of nickel chloride respectively, and slowly adding deionized water into a mixed system of the materials under a stirring state until the solute is fully dissolved and dispersed to obtain a solution A;
step two, taking 70g of polyacrylamide, slowly adding the polyacrylamide into the solution A while stirring, continuously stirring until a gel substance is generated, and stopping stirring to obtain a gel B;
aging the gel B for 24 hours at 50 ℃, then putting the gel B into a 110 ℃ forced air drying oven for full drying, and grinding to obtain powder C;
and step four, putting the ground powder into a furnace body with air atmosphere protection, calcining for 6 hours at 500 ℃, and washing and drying by using 5 wt% of citric acid to obtain the normal-temperature ammonia dry adsorption material.
The primary particle size of the normal-temperature ammonia gas dry-type adsorbing material is about 6 nm. 500g of the normal-temperature ammonia dry adsorption material is filled in a honeycomb filter to obtain a normal-temperature ammonia removal filter, and the filter is placed at an air volume of 500m 3 In the air purification equipment of/h, the air purification equipment is 30m according to the GB/T18801- 3 The initial concentration of ammonia gas is 2.37mg/m in the test of the experimental chamber 3 The amount of clean ammonia (and the CADR value of ammonia) is 373m 3 /h。
Example 3
The embodiment provides a normal-temperature ammonia dry adsorption material, and a preparation method thereof comprises the following steps:
step one, accurately weighing 24g of aluminum chloride, 8g of CTAB, 5g of copper chloride and 5g of cobalt chloride respectively, and slowly adding deionized water into a mixed system of the materials under a stirring state until the solute is fully dissolved and dispersed to obtain a solution A;
step two, taking 60g of sodium alginate, slowly adding the sodium alginate into the solution A while stirring, continuously stirring until a gel substance is generated, and stopping stirring to obtain a gel B;
aging the gel B for 72h at the temperature of 30 ℃, then putting the gel B into a 110 ℃ forced air drying oven for full drying, and grinding to obtain powder C;
and step four, putting the ground powder into a furnace body with air atmosphere protection, calcining for 5 hours at 650 ℃, and washing and drying by using 5 wt% of citric acid to obtain the normal-temperature ammonia dry adsorption material.
The primary particle size of the normal-temperature ammonia gas dry-type adsorbing material is about 10 nm. 500g of the normal-temperature ammonia dry adsorption material is filled in a honeycomb filter to obtain a normal-temperature ammonia removal filter, and the filter is placed at an air volume of 500m 3 In the air purification equipment of/h, the air purification equipment is 30m according to the GB/T18801- 3 The initial concentration of ammonia gas is 2.27mg/m in the test of the experimental chamber 3 The amount of clean ammonia (i.e., ammonia CADR) was 401m 3 /h。
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (8)
1. A preparation method of a normal-temperature ammonia dry adsorption material is characterized by comprising the following steps:
the method comprises the following steps:
step one, mixing an aluminum source precursor, a template agent and a chloride reactant, adding a solvent, and stirring until the aluminum source precursor, the template agent and the chloride reactant are fully dissolved and dispersed to obtain a solution A;
the precursor of the aluminum source is one of aluminum nitrate, aluminum sulfate and aluminum chloride; the template agent is one of cetyl trimethyl ammonium bromide and polyethylene glycol; the chloride reactant is one or more of nickel chloride, copper chloride and cobalt chloride;
step two, adding a coagulant into the solution A to generate a gelatinous substance and a gel B;
the coagulant is one of polyacrylamide and sodium alginate;
step three, aging, drying and grinding the gel B to obtain powder C;
and step four, putting the powder C into a furnace body filled with atmosphere protective gas, calcining for 4-6 hours at 500-600 ℃, and drying after acid washing to obtain the normal-temperature ammonia dry adsorption material.
2. A method for preparing a normal-temperature ammonia gas dry-type adsorbent according to claim 1, characterized in that:
wherein the solvent is one or a mixture of absolute ethyl alcohol and deionized water.
3. A method for preparing a normal-temperature ammonia gas dry-type adsorbent according to claim 1, characterized in that:
the mass part ratio of the aluminum source precursor, the template agent, the chloride reactant and the coagulant is 20-30: 5-10: 50-70.
4. A method for preparing a normal-temperature ammonia gas dry-type adsorbent according to claim 1, characterized in that:
in the third step, the aging temperature is 30-50 ℃, and the aging time is 24-72 hours.
5. A method for preparing a normal-temperature ammonia gas dry-type adsorbent according to claim 1, characterized in that:
wherein, in the third step, the drying temperature is 110 ℃.
6. A method for preparing a normal-temperature ammonia gas dry-type adsorbent according to claim 1, characterized in that:
wherein, in the fourth step, the atmosphere protective gas is nitrogen or air.
7. A method for preparing a normal-temperature ammonia gas dry-type adsorbent according to claim 1, characterized in that:
wherein, in the fourth step, the acid used for pickling is 5 wt% of citric acid.
8. An ammonia dry adsorbent at room temperature obtained by the method according to any one of claims 1 to 7.
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