CN117101376A - Efficient and stable carbon dioxide absorbent particles and preparation method and application thereof - Google Patents
Efficient and stable carbon dioxide absorbent particles and preparation method and application thereof Download PDFInfo
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- CN117101376A CN117101376A CN202311331409.7A CN202311331409A CN117101376A CN 117101376 A CN117101376 A CN 117101376A CN 202311331409 A CN202311331409 A CN 202311331409A CN 117101376 A CN117101376 A CN 117101376A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 140
- 239000002245 particle Substances 0.000 title claims abstract description 91
- 239000002250 absorbent Substances 0.000 title claims abstract description 73
- 230000002745 absorbent Effects 0.000 title claims abstract description 73
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 70
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title abstract description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 84
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 37
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 37
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 239000008367 deionised water Substances 0.000 claims abstract description 25
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 16
- 229910000323 aluminium silicate Inorganic materials 0.000 claims abstract description 8
- 239000002734 clay mineral Substances 0.000 claims abstract description 8
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000003546 flue gas Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 19
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical group [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 18
- 239000000440 bentonite Substances 0.000 claims description 17
- 229910000278 bentonite Inorganic materials 0.000 claims description 17
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 17
- 238000001125 extrusion Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- 239000002808 molecular sieve Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims 2
- 239000005995 Aluminium silicate Substances 0.000 claims 1
- 235000012211 aluminium silicate Nutrition 0.000 claims 1
- 229960000892 attapulgite Drugs 0.000 claims 1
- 239000003623 enhancer Substances 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
- 229910052625 palygorskite Inorganic materials 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 28
- 230000007774 longterm Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 4
- 238000010298 pulverizing process Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 18
- 239000011268 mixed slurry Substances 0.000 description 11
- 229910001220 stainless steel Inorganic materials 0.000 description 10
- 239000010935 stainless steel Substances 0.000 description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- 239000011265 semifinished product Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000429 sodium aluminium silicate Substances 0.000 description 3
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 3
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920000168 Microcrystalline cellulose Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008108 microcrystalline cellulose Substances 0.000 description 2
- 235000019813 microcrystalline cellulose Nutrition 0.000 description 2
- 229940016286 microcrystalline cellulose Drugs 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- PTHCMJGKKRQCBF-UHFFFAOYSA-N Cellulose, microcrystalline Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC)C(CO)O1 PTHCMJGKKRQCBF-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229960000913 crospovidone Drugs 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000003906 humectant Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229940031703 low substituted hydroxypropyl cellulose Drugs 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000523 polyvinylpolypyrrolidone Polymers 0.000 description 1
- 235000013809 polyvinylpolypyrrolidone Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229940083542 sodium Drugs 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- 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
- B01D53/81—Solid phase processes
-
- 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
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to a high-efficiency stable carbon dioxide absorbent particle, a preparation method and application thereof, wherein the carbon dioxide absorbent particle is prepared from the following raw material components in parts by weight: 75 to 85 parts of calcium hydroxide, 1 to 3 parts of sodium hydroxide, 0.1 to 1.5 parts of aluminum powder, 0.5 to 1.5 parts of aluminosilicate reinforcing agent, 0.5 to 1.5 parts of clay mineral reinforcing agent and 45 to 60 parts of deionized water. Compared with the prior art, the calcium hydroxide type carbon dioxide absorbent particles prepared by the invention have the advantages of good carbon dioxide absorption capacity, high mechanical strength, high absorption rate and high product stability and reliability, meet the requirement of no pulverization in long-term use and long-term storage, are inorganic in all components, and are suitable for the nuclear industrial carbon dioxide absorption of which organic components are unsuitable, and other application scenes of carbon dioxide absorption of air, flue gas, automobile tail gas, industrial tail gas and the like.
Description
Technical Field
The invention relates to the field of carbon dioxide absorption functional materials, in particular to efficient and stable carbon dioxide absorbent particles, a preparation method and application thereof.
Background
Carbon dioxide is considered as a greenhouse gas as a major factor contributing to the global warming effect. Along with the development of the whole human society, the excessive exploitation and use of a large amount of fossil fuels cause the increase of the concentration of carbon dioxide in the world, thereby causing the global climate abnormality and bringing serious threat to the global ecological system and the human living environment. Capturing and sequestering carbon dioxide using carbon dioxide capture technology is not only an important technical means to control the continued increase in carbon dioxide concentration in the environment.
Among existing carbon dioxide capturing technologies, carbon dioxide capturing methods based on solid absorbents have been widely focused in the scientific research and industry in recent years because of their advantages of good absorption performance, small corrosion to equipment, no secondary pollution to the environment, and the like. Among the solid absorbents, the calcium hydroxide-based carbon dioxide absorbent is widely used due to advantages of low use cost, fast reaction rate and high absorption capacity, and the shaped particles are a key step for convenient use thereof. However, the existing commercial calcium hydroxide absorbent particles have low mechanical strength and poor stability, are easy to pulverize and deliquesce due to collision in the use and transportation processes, so that the absorbent performance is reduced, and meanwhile, fine powder can generate dust, so that great hidden danger is brought to operation equipment in industrial application, and the service life of the equipment is influenced.
The pharmaceutical field generally provides stability to the absorbent particles by adding organic components, avoiding pulverization phenomena. For example, patent CN110614020a discloses a novel high-strength calcium hydroxide type carbon dioxide absorbent suitable for the medical field and a preparation method thereof, the method uses calcium hydroxide as an absorbent, and the particle strength of the absorbent is enhanced by adding sodium aluminosilicate and ethylene vinyl acetate copolymer resin, and as the product mainly faces the medical field, the product also uses various materials such as calcium hydroxide, potassium hydroxide, inorganic humectant and the like, thereby increasing the material manufacturing cost and working procedures; patent CN04399359a discloses a preparation method of a medical carbon dioxide solid absorbent, which uses various materials such as sodium hydroxide, calcium hydroxide, potassium hydroxide, lithium hydroxide, microcrystalline cellulose and the like, and the finally prepared solid absorbent is still a powdery product, the absorbent has low absorption capacity, and the absorbent is not fully used; patent CN102258938A discloses a preparation method of medical carbon dioxide absorbent soda lime, which uses sodium hydroxide, calcium hydroxide and potassium hydroxide, and also adds various medical disintegrating agents such as carboxymethyl starch sodium, crospovidone, low-substituted hydroxypropyl cellulose, microcrystalline cellulose and the like. The products of the above patents are mainly oriented to the medical field, and although the clinical requirements of the medical field are met, the organic components are added to improve the particle strength, and the application range of the absorbent is limited due to the addition of the organic components, so that the absorbent is difficult to be applied to carbon dioxide absorption scenes in the nuclear radiation. At present, calcium hydroxide-based carbon dioxide absorbers have no high-strength stable particulate product of all inorganic components.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the efficient and stable carbon dioxide absorbent particles, the preparation method and the application thereof, and the prepared absorbent particles are all inorganic components, have good carbon dioxide absorption capacity, high mechanical strength and high absorption rate, have high product stability and reliability, and meet the requirement of no pulverization in long-term use and long-term storage; meanwhile, the invention has low cost of raw materials and simple preparation method, and is a carbon dioxide absorbent with industrialized prospect.
The aim of the invention can be achieved by the following technical scheme:
the invention provides a high-efficiency stable carbon dioxide absorbent particle, which comprises the following components in parts by weight:
75-85 parts of calcium hydroxide
1 to 3 parts of sodium hydroxide
0.5 to 1.5 portions of aluminum powder
0.5 to 1.5 portions of aluminosilicate reinforcing agent
0.5 to 1.5 portions of clay mineral reinforcing agent
45-60 parts of deionized water.
Further, the clay mineral reinforcing agent is bentonite.
Further, the aluminosilicate reinforcing agent is a molecular sieve composed of silicon dioxide and aluminum trioxide in different proportions, wherein the silicon-aluminum ratio is between 1 and 300.
The second aspect of the present invention provides a method for preparing the highly efficient and stable carbon dioxide absorbent particles as described above, comprising the steps of:
(1) Placing weighed calcium hydroxide and sodium hydroxide raw materials into a container of a stirrer for premixing;
(2) Adding a weighed aluminosilicate reinforcing agent and a weighed clay mineral reinforcing agent into the material obtained in the step (1), and stirring in a stirrer;
(3) Adding deionized water into a stirrer, and stirring until the deionized water and the deionized water are uniformly mixed;
(4) Adding weighed aluminum powder into the material obtained in the step (3), and continuously stirring until the materials are uniformly mixed;
(5) Adding the absorbent slurry obtained in the step (4) into an extrusion granulator, and pressing into uniformly distributed formed columnar particles;
(6) Placing the formed columnar particles obtained in the step (5) into a vacuum drying oven for drying;
(7) And (3) placing the particles dried in the step (6) into a muffle furnace for heat treatment to obtain a carbon dioxide absorbent particle finished product.
Further, in the step (1) and the step (2), the stirring time is 2 to 5 minutes, and the stirring rotation speed is 1500 to 2500rpm.
Further, in the step (3), the stirring mode is as follows: stirring at 1500-2500 rpm for 3-5 min, and stirring at 3500-4000 rpm for 3-5 min.
Further, in the step (4), the stirring time is 5 to 8 minutes, and the stirring speed is 3500 to 4000rpm.
Further, in the step (5), when using an extrusion granulator, columnar particles with the length of 0.5-1.5 cm and the particle diameter of 0.5-1.5 mm are pressed by a template.
Further, in the step (6), the temperature of the vacuum drying process is controlled to be 80-140 ℃ and the drying time is 6-8 hours.
Further, in the step (7), the roasting temperature is 200-400 ℃ and the roasting time is 6-12 hours.
The third aspect of the invention provides an application of the high-efficiency stable carbon dioxide absorbent particles, which is suitable for carbon dioxide absorption in nuclear industry and application scenes of carbon dioxide absorption in other air, flue gas, automobile exhaust, industrial exhaust and the like.
Compared with the prior art, the invention has the following technical advantages:
(1) The product of the invention totally uses inorganic components, improves the structural strength of calcium hydroxide and sodium hydroxide absorbent by aluminosilicate molecular sieve reinforcing agent, and makes the absorbent obtained by clay mineral reinforcing agent puffing have a porous structure with strong material quality, large porosity, large volume for absorbing carbon dioxide, more sufficient use of the absorbent, uniform pore after reinforcing, higher carbon dioxide absorption rate, shortened manufacturing process and saved material cost, and is suitable for industrialized large-scale application.
(2) The invention adopts a method of combining vacuum drying and roasting, can promote the combination of bentonite and calcium hydroxide absorbent, improve the integral pore structure of absorbent particles, and is beneficial to promoting the full contact of carbon dioxide gas and absorbent and improving the absorptivity of finished products. The method can promote the uniform distribution of the reinforcing agent in the absorbent particles and increase the strength and stability of the absorbent particles.
(3) According to the invention, aluminum powder is added into the raw materials of the product to serve as a pore-increasing agent, the aluminum powder reacts with water and calcium hydroxide to generate hydrogen, and the generation of gas is beneficial to improving the porosity of the absorbent particles, so that the absorption effect of the absorbent is further improved.
(4) The product exists in the form of shaped particles, the final product has good hardness, the product is not easy to damage even under the impact of external force, the phenomena of particle breakage and pulverization do not occur in long-term use and storage, and the product has good carbon dioxide absorption capacity and is suitable for carbon dioxide absorption under various environmental conditions.
Detailed Description
The present invention will be described in detail with reference to specific examples. In the technical scheme, the characteristics of preparation means, materials, structures or composition ratios and the like which are not explicitly described are regarded as common technical characteristics disclosed in the prior art.
Example 1
The carbon dioxide absorbent particle in the embodiment comprises the following raw materials in parts by weight: 77 parts of calcium hydroxide, 3 parts of sodium hydroxide, 1 part of aluminum powder, 1 part of Y-type porous molecular sieve, 1 part of bentonite and 50 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all porous molecular sieve and bentonite are added, stirred for 1 minute in the stirrer, all ionized water is added, stirred for 6 minutes in the stirrer, all aluminum powder is added, stirred for 6 minutes in the stirrer to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, and then placing the columnar particles into a muffle furnace to be roasted at 350 ℃ for 8 hours to obtain a finished product.
Example 2
The carbon dioxide absorbent particle in the embodiment comprises the following raw materials in parts by weight: 77 parts of calcium hydroxide, 3 parts of sodium hydroxide, 0.5 part of aluminum powder, 1 part of A-type porous molecular sieve, 1 part of bentonite and 50 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all porous molecular sieve and bentonite are added, stirred for 1 minute in the stirrer, all ionized water is added, stirred for 6 minutes in the stirrer, all aluminum powder is added, stirred for 6 minutes in the stirrer to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, and then placing the columnar particles into a muffle furnace to bake for 8 hours at 200 ℃ to obtain the finished product.
Example 3
The carbon dioxide absorbent in the embodiment comprises the following raw materials in parts by weight: 77 parts of calcium hydroxide, 3 parts of sodium hydroxide, 1 part of aluminum powder, 1 part of ZSM-5 porous molecular sieve, 1 part of bentonite and 50 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all porous molecular sieve and bentonite are added, stirred for 1 minute in the stirrer, all ionized water is added, stirred for 6 minutes in the stirrer, all aluminum powder is added, stirred for 6 minutes in the stirrer to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, and then placing the columnar particles into a muffle furnace to be roasted at 400 ℃ for 8 hours to obtain a finished product.
Example 4
The carbon dioxide absorbent in the embodiment comprises the following raw materials in parts by weight: 77 parts of calcium hydroxide, 3 parts of sodium hydroxide, 1 part of aluminum powder, 1 part of HZSM-5 porous molecular sieve, 1 part of bentonite and 50 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all porous molecular sieve and bentonite are added, stirred for 1 minute in the stirrer, all ionized water is added, stirred for 6 minutes in the stirrer, all aluminum powder is added, stirred for 6 minutes in the stirrer to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, and then placing the columnar particles into a muffle furnace to be roasted at 250 ℃ for 8 hours to obtain a finished product.
Example 5
The carbon dioxide absorbent in the embodiment comprises the following raw materials in parts by weight: 75 parts of calcium hydroxide, 1 part of sodium hydroxide, 1 part of aluminum powder, 0.5 part of Y-type porous molecular sieve, 0.5 part of bentonite and 45 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all porous molecular sieve and bentonite are added, stirred for 1 minute in the stirrer, all ionized water is added, stirred for 6 minutes in the stirrer, all aluminum powder is added, stirred for 6 minutes in the stirrer to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, and then placing the columnar particles into a muffle furnace to be roasted at 350 ℃ for 8 hours to obtain a finished product.
Example 6
The carbon dioxide absorbent in the embodiment comprises the following raw materials in parts by weight: 85 parts of calcium hydroxide, 3 parts of sodium hydroxide, 1.5 parts of Y-type porous molecular sieve, 1.5 parts of bentonite and 60 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all porous molecular sieve and bentonite are added, stirred for 1 minute in the stirrer, all ionized water is added, stirred for 6 minutes in the stirrer, all aluminum powder is added, stirred for 6 minutes in the stirrer to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, and then placing the columnar particles into a muffle furnace to be roasted at 350 ℃ for 8 hours to obtain a finished product.
Comparative example 1
The carbon dioxide absorbent in the comparative example comprises the following raw materials in parts by weight: 77 parts of calcium hydroxide, 3 parts of sodium hydroxide and 50 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all deionized water is added, the mixture is stirred in the stirrer for 6 minutes to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter and the length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, and then placing the columnar particles into a muffle furnace to be roasted at 350 ℃ for 8 hours to obtain a finished product.
Comparative example 2
The carbon dioxide absorbent in the comparative example comprises the following raw materials in parts by weight: 77 parts of calcium hydroxide, 3 parts of sodium hydroxide, 1 part of sodium aluminosilicate and 50 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all sodium aluminosilicate is added, stirred for 1 minute in the stirrer, all deionized water is added, stirred for 6 minutes in the stirrer to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter and the length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, and then placing the columnar particles into a muffle furnace to be roasted at 350 ℃ for 8 hours to obtain a finished product.
Comparative example 3
The carbon dioxide absorbent in the comparative example comprises the following raw materials in parts by weight: 81 parts of commercial soda lime absorbent and 50 parts of deionized water.
The preparation method comprises the following steps: all commercial soda lime absorbent is put into a container, all deionized water is added, the mixture is stirred in a stirrer for 6 minutes to obtain evenly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, then placing the columnar particles into a muffle furnace, roasting at 350 ℃ for 8 hours to obtain a semi-finished product, and finally treating the roasted semi-finished product particles with water mist for 30 minutes to obtain the finished product.
Comparative example 4
The carbon dioxide absorbent in the comparative example comprises the following raw materials in parts by weight: 77 parts of calcium hydroxide, 3 parts of sodium hydroxide, 1 part of bentonite and 50 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all bentonite is added, stirred for 1 minute in the stirrer, all deionized water is added, stirred for 6 minutes in the stirrer to obtain uniformly mixed slurry, and the slurry is extruded by an extrusion granulator to prepare columnar particles with the diameter and the length of 1cm and the particle size of 1 mm. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, then placing the columnar particles into a muffle furnace, roasting at 350 ℃ for 8 hours to obtain a semi-finished product, and finally treating the roasted semi-finished product particles with water mist for 30 minutes to obtain the finished product.
Comparative example 5
The carbon dioxide absorbent in the comparative example comprises the following raw materials in parts by weight: 77 parts of calcium hydroxide, 3 parts of sodium hydroxide, 1 part of aluminum powder and 50 parts of deionized water.
The preparation method comprises the following steps: all calcium hydroxide and sodium hydroxide raw materials are placed into a container, stirred and premixed for 2 minutes by a stainless steel double-blade stirrer, all deionized water is added, stirred for 6 minutes in the stirrer, all aluminum powder is added, stirred for 6 minutes in the stirrer, uniform mixed slurry is obtained, and columnar particles with the diameter length of 1cm and the particle size of 1mm are prepared by extrusion through an extrusion granulator. And (3) drying the columnar particles in vacuum at 100 ℃ for 3 hours, then placing the columnar particles into a muffle furnace, roasting at 350 ℃ for 8 hours to obtain a semi-finished product, and finally treating the roasted semi-finished product particles with water mist for 30 minutes to obtain the finished product.
Performance test:
the absorbents prepared in the above examples and comparative examples were used for performance testing.
The absorbent particle strength test procedure: about 20g of the absorbent sample was taken, placed in a 19cm X10.5 cm X5 cm aluminum box, and steel balls 20 grains having a diameter of 7.9mm were added, and moved on the plate at a speed of two times per second over a distance of 26cm (including a box length of 19 cm) for 3 minutes, and the steel balls were taken out and sieved with a sieve having a pore diameter of 0.45mm, and the ratio of the weight of the sieve portion to the original weight of the sample was the grain strength of the sample, which is also called a failure rate.
Carbon dioxide absorption performance testing process: a self-made small carbon dioxide absorption column is used as a carbon dioxide absorption performance testing device, and the cavity of the absorption column is a cylindrical cavity with the inner diameter of 5.5cm and the height of 13 cm; the absorbents of the above examples and comparative examples were tested for their absorption rate for carbon dioxide under experimental conditions of an experimental temperature of 20 degrees celsius, an intake carbon dioxide concentration of 10% (nitrogen concentration of 90%), an amount of absorbent of 40g, and an intake carbon dioxide amount of 142 mL/min.
The particle strength and the absorption rate of carbon dioxide of each absorbent in the examples are shown in the following table:
| example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Particle strength | 100％ | 100％ | 100％ | 100％ | 100％ | 100％ |
| Absorption rate of carbon dioxide | 35.8％ | 35.1％ | 33.2％ | 32.8％ | 32.7％ | 34.9％ |
The particle strength and the absorption rate of carbon dioxide of each absorbent in the comparative example are shown in the following table:
| comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | |
| Particle strength | 75％ | 83％ | 79％ | 82％ | 88％ |
| Absorption rate of carbon dioxide | 28.5％ | 26.8％ | 24.5％ | 29.2％ | 30.1％ |
From the results of the above particle strength test and the absorption performance test, it is known that the six absorbent particles of the present invention have high absorption rate of carbon dioxide and high particle strength, and the product stability is excellent.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. The efficient and stable carbon dioxide absorbent is characterized in that all components are inorganic matters and comprise the following components in parts by weight:
75-85 parts of calcium hydroxide;
1-3 parts of sodium hydroxide;
0.5 to 1.5 portions of aluminum powder;
0.5 to 1.5 portions of aluminosilicate reinforcing agent;
0.5 to 1.5 portions of clay mineral reinforcing agent;
45-60 parts of deionized water.
2. The efficient and stable carbon dioxide absorbent according to claim 1, wherein the clay mineral reinforcing agent is one of bentonite, kaolin and attapulgite.
3. The efficient and stable carbon dioxide absorbent according to claim 1, wherein the aluminosilicate enhancer is a molecular sieve composed of silica and alumina in different proportions, wherein the silica to alumina ratio is between 1 and 300.
4. A method for preparing the highly effective and stable carbon dioxide absorbent according to any one of claims 1 to 3, comprising the steps of:
(1) Placing weighed calcium hydroxide and sodium hydroxide raw materials into a stirring container for premixing;
(2) Adding a weighed aluminosilicate reinforcing agent and a weighed clay mineral reinforcing agent into the material obtained in the step (1), and stirring in a stirrer;
(3) Adding a certain volume of deionized water into a stirrer, and stirring until the deionized water and the deionized water are uniformly mixed;
(4) Adding weighed aluminum powder into the material obtained in the step (3), and continuously stirring until the materials are uniformly mixed;
(5) Adding the slurry obtained in the step (4) into an extrusion granulator, and pressing into uniform formed particles;
(6) Placing the formed particles obtained in the step (5) into a vacuum drying oven for drying;
(7) And (3) placing the molded particles dried in the step (6) into a muffle furnace for heat treatment to obtain carbon dioxide absorbent particle finished products.
5. The method for preparing a highly effective and stable carbon dioxide absorbent according to claim 4, wherein in step (3), the stirring mode is: stirring at 1500-2500 rpm for 3-5 min, and stirring at 3500-4000 rpm for 3-5 min.
6. The method for producing a highly efficient and stable carbon dioxide absorbent according to claim 4, wherein in the step (4), the stirring time is 5 to 8 minutes, and the stirring speed is 3500 to 4000rpm.
7. The method for producing a highly efficient and stable carbon dioxide absorbent according to claim 4, wherein in step (5), columnar particles having a length of 0.5 to 1.5cm and a particle diameter of 0.5 to 1.5mm are formed by pressing using a die plate in the case of using an extrusion granulator.
8. The method for preparing a highly efficient and stable carbon dioxide absorbent according to claim 4, wherein in step (6), the temperature of the vacuum drying process is controlled to be 60-140 ℃ and the drying time is 6-8 hours.
9. The method for producing a highly efficient and stable carbon dioxide absorbent according to claim 4, wherein in step (7), the calcination temperature is 200 to 400 ℃ and the calcination time is 6 to 12 hours.
10. Use of a highly effective stable carbon dioxide absorbent according to any of claims 1-3, characterized in that the absorbent application is in one of air, flue gas, automobile exhaust, industrial exhaust.
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