CN114605168A - Preparation method of air filter material based on pansy porous ceramic and zeolite - Google Patents
Preparation method of air filter material based on pansy porous ceramic and zeolite Download PDFInfo
- Publication number
- CN114605168A CN114605168A CN202210238011.8A CN202210238011A CN114605168A CN 114605168 A CN114605168 A CN 114605168A CN 202210238011 A CN202210238011 A CN 202210238011A CN 114605168 A CN114605168 A CN 114605168A
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- China
- Prior art keywords
- porous ceramic
- zeolite
- filter material
- air filter
- panzelite
- Prior art date
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- 239000000919 ceramic Substances 0.000 title claims abstract description 66
- 239000000463 material Substances 0.000 title claims abstract description 50
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 43
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000010457 zeolite Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 235000004031 Viola x wittrockiana Nutrition 0.000 title claims description 11
- 244000225942 Viola tricolor Species 0.000 title description 10
- 229910052878 cordierite Inorganic materials 0.000 claims abstract description 38
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000002808 molecular sieve Substances 0.000 claims abstract description 18
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 239000000725 suspension Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000012153 distilled water Substances 0.000 claims abstract description 6
- 230000001174 ascending effect Effects 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 16
- 239000005995 Aluminium silicate Substances 0.000 claims description 15
- 235000012211 aluminium silicate Nutrition 0.000 claims description 15
- 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 description 15
- 239000000454 talc Substances 0.000 claims description 14
- 229910052623 talc Inorganic materials 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 4
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 4
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000005642 Oleic acid Substances 0.000 claims description 4
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 4
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 4
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 4
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 229920002261 Corn starch Polymers 0.000 claims description 2
- 239000005639 Lauric acid Substances 0.000 claims description 2
- 235000019484 Rapeseed oil Nutrition 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- 235000021307 Triticum Nutrition 0.000 claims description 2
- 244000098338 Triticum aestivum Species 0.000 claims description 2
- 241000276425 Xiphophorus maculatus Species 0.000 claims description 2
- 229910001593 boehmite Inorganic materials 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000008120 corn starch Substances 0.000 claims description 2
- 235000013312 flour Nutrition 0.000 claims description 2
- 235000011187 glycerol Nutrition 0.000 claims description 2
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 2
- 235000021388 linseed oil Nutrition 0.000 claims description 2
- 239000000944 linseed oil Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000004005 microsphere Substances 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000004014 plasticizer Substances 0.000 claims description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims description 2
- 229910001950 potassium oxide Inorganic materials 0.000 claims description 2
- 229920001592 potato starch Polymers 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000011257 shell material Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 244000047670 Viola x wittrockiana Species 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000004419 Panlite Substances 0.000 abstract 1
- 235000012222 talc Nutrition 0.000 description 8
- 239000000835 fiber Substances 0.000 description 3
- 239000011941 photocatalyst Substances 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
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- B01J20/28002—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 physical properties
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- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
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Abstract
The invention relates to a preparation technology of an air filter material, and in particular relates to a preparation method of an air filter material based on a panlite porous ceramic and zeolite. Uniformly mixing polyvinyl alcohol and distilled water, and stirring at 85-95 ℃ to dissolve the polyvinyl alcohol to obtain a solution A; adding a zeolite molecular sieve into the solution A and uniformly mixing to obtain a suspension B; putting the cordierite porous ceramic into the suspension B at a uniform speed at a descending rate of 0.5-1.5 mm/s, then pulling the cordierite porous ceramic away from the suspension B at a uniform speed at an ascending descending rate of 0.5-1.5 mm/s, drying to obtain the filmed cordierite porous ceramic, and repeating the filming for more than 5 times; and roasting the dried cordierite porous ceramic to obtain the air filtering material. The invention has simple process and convenient operation, and the prepared filter material has the characteristics of concentrated pore distribution, high porosity, low thermal expansion coefficient, high compressive strength and the like, and simultaneously has high purification efficiency and strong adsorption capacity, and can be applied to air purifiers.
Description
Technical Field
The invention relates to a preparation technology of an air filter material, and in particular relates to a preparation method of an air filter material based on a pansy porous ceramic and zeolite.
Background
In recent years, with the development of industrialization in China, the problem of environmental pollution is endless, the air quality is increasingly reduced, and the importance of people to the air quality is more clearly known. In order to meet the requirements of people on indoor hygiene standards, production process standards and the like, air filtration has become the most basic requirement for air treatment. The air filter material is the core composition of the air filter material, and the performance of the air filter material is directly related to the filtering effect of air-attacking filter gas.
The commonly used air purifying materials at present are fiber filter materials and photocatalyst filter screens. Although the fiber filtering material has the characteristics of large specific surface area, low price, easy processing and the like, the fiber filtering material needs to be replaced regularly when in use, is easy to be burned by water drops, has large wind resistance, is easy to breed bacteria, and has great trouble in the use process. The photocatalyst filter screen is prepared by spraying the photocatalyst on a porous screen, has good catalytic purification function, but cannot play a role in filtering because the mesh diameter of the porous screen is larger, has single function and has low solar energy utilization efficiency.
Disclosure of Invention
The invention provides a preparation method of an air filter material based on pansy porous ceramic and zeolite, which aims at solving the problems of the air filter material in the prior art, wherein the pansy porous ceramic is taken as a carrier, the zeolite is taken as a filter material, the content of the zeolite is controlled by a method of infiltrating and laminating, and the pore size and the distribution of the material are controlled, so that the air filter material with low thermal expansion coefficient, good thermal shock resistance, good mechanical strength, high porosity, high adsorption performance and small filter resistance is prepared.
The cordierite porous ceramic has the characteristics of high porosity, low thermal expansion coefficient, high temperature resistance, corrosion resistance, stable chemical performance, large gas contact area, small filtration resistance and the like, and the characteristics of large adsorption capacity of the zeolite molecular sieve at low pressure and low concentration, environmental friendliness, long service life and the like. The use performance of the prepared material is greatly improved, and the use requirement of the air filtering material is met.
A preparation method of an air filter material based on pansy porous ceramic and zeolite comprises the following specific steps:
(1) uniformly mixing polyvinyl alcohol and distilled water, and stirring at 85-95 ℃ to dissolve the polyvinyl alcohol to obtain a solution A;
(2) adding a zeolite molecular sieve into the solution A obtained in the step (1) and uniformly mixing to obtain a suspension B;
(3) putting cordierite porous ceramic into the suspension B obtained in the step (2) at a uniform speed at a descending rate of 0.5-1.5 mm/s, and then pulling the cordierite porous ceramic away from the suspension B at a uniform speed at an ascending and descending rate of 0.5-1.5 mm/s to obtain coated cordierite porous ceramic;
(4) drying the coated cordierite porous ceramic obtained in the step (3), and repeatedly coating for more than 3 times;
(5) and (5) roasting the dried cordierite porous ceramic obtained in the step (4) at the temperature of 370-390 ℃ for 3-6 h to obtain the air filtering material.
The mass ratio of the polyvinyl alcohol to the distilled water in the step (1) is 1: 30-50.
The mass concentration of the zeolite molecular sieve in the suspension B in the step (2) is 0.025-0.1 g/mL.
The preparation method of the zeolite molecular sieve in the step (2) comprises the following steps:
s1, uniformly dispersing sodium silicate, sodium aluminate and silicon oxide into deionized water, and stirring for 2-3 hours to obtain a zeolite synthetic solution;
s2, crystallizing the zeolite synthetic liquid at the temperature of 100-120 ℃ for 3-5 hours, and sequentially washing, filtering, drying and screening to obtain the zeolite molecular sieve.
Furthermore, the mole ratio of the aluminum oxide to the silicon oxide to the sodium oxide in the zeolite molecular sieve is 1: 1-3: 8-9.
The preparation method of the cordierite porous ceramic in the step (3) comprises the following steps:
1) uniformly mixing talc, kaolin, silicon oxide and alumina to obtain a mixture A;
2) adding a dispersing agent, a plastic agent and a pore-forming agent into the mixture A, and uniformly stirring to obtain a mixture B;
3) adding water and an extrusion aid into the mixture B, and uniformly stirring to obtain pug;
4) sequentially carrying out ageing, pugging and impurity removal on the pug, then carrying out extrusion forming, and carrying out microwave drying to obtain a ceramic green body;
5) and sintering the ceramic green body to obtain the cordierite porous ceramic.
Based on the mass of the mixture A as 100 wt%, 37-43 wt% of talc, 12-25 wt% of kaolin, 0.1-30 wt% of alumina and 0.1-20 wt% of silicon oxide; 0.1 to 5 weight percent of dispersant, 0.1 to 10 weight percent of extrusion auxiliary agent, 0.1 to 10 weight percent of plastic agent, 0.1 to 65 weight percent of pore-forming agent and 22 to 26 weight percent of water.
The dispersing agent is one or more of oleic acid, stearic acid and sodium stearate, the plasticizer is one or more of graphite, cellulose, polyvinyl alcohol and wheat flour, the pore-forming agent is one or more of potato starch, graphite, shell powder, wood chips, PMMA microspheres and corn starch, and the extrusion auxiliary agent is one or more of oleic acid, lauric acid, glycerol, linseed oil and rapeseed oil.
The talc is a platy structure talc, the content of iron oxide in the talc is not higher than 1 wt%, and the total content of calcium oxide, sodium oxide and potassium oxide is not higher than 0.6 wt%; the kaolin is one or more of calcined kaolin, water-washed kaolin and raw kaolin; the silicon oxide is one or more of fused silicon oxide and spherical silicon oxide; the alumina is one or more of alpha-alumina, gamma-alumina and boehmite.
The method for preparing the cordierite porous ceramic comprises the step 5) of roasting
Sequentially heating from room temperature to 100-180 ℃ at a heating rate of 10-30 ℃/h; raising the temperature to 600-1000 ℃ at a heating rate of 30-50 ℃/h, and preserving the heat for 0.1-12 h; heating to 1320-1435 ℃ at a heating rate of 100-150 ℃/h, and preserving heat for 2-24 h.
In the stage from room temperature to 180 ℃, a slow temperature rise speed is required, the main purpose of which is to remove water which is not completely removed in the drying process of the ceramic body and to prevent the cracking of the body caused by the rapid temperature change in the drying process. At 600-1000 ℃, organic matters in the ceramic carrier start to be largely decomposed, and the heat preservation program in the process is mainly set to fully decompose and discharge the organic matters in the ceramic blank. And then rapidly heating to 1320-1435 ℃, wherein the rapid heating is used for preventing the generation of a mullite phase, and then carrying out long-time heat preservation at the highest temperature is favorable for the growth of cordierite crystals.
The invention has the beneficial effects that:
(1) the coefficient of thermal expansion (RT-800 ℃) of the air filter material is not higher than 0.8 multiplied by 10-6/° c; the thermal shock resistance temperature is not lower than 500 ℃; the porosity is 60-65%; the compressive strength in the direction of the pore channels is more than 5.0Mpa, and the compressive strength in the direction vertical to the pore channels is not less than 1.0 Mpa;
(2) the invention has simple process and convenient operation, and the prepared air filtering material has the characteristics of concentrated pore distribution, high porosity, low thermal expansion coefficient, high compressive strength and the like, and simultaneously has high purification efficiency and strong adsorption capacity, and can be applied to an air purifier.
Drawings
FIG. 1 is a pore size distribution curve of sample 1, which is a porous ceramic carrier of panzelite;
FIG. 2 is a graph of the thermal expansion of sample 5, a sample of a porous ceramic carrier, made from pansy, from room temperature to 800 deg.C;
FIG. 3 is an XRD pattern of a sample 8 cordierite porous ceramic support;
fig. 4 is an SEM image of the air filter material of sample 12.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to the description.
Example (b): a preparation method of an air filter material based on pansy porous ceramic and zeolite comprises the following specific steps:
(1) uniformly mixing polyvinyl alcohol and distilled water, and stirring at 85-95 ℃ to dissolve the polyvinyl alcohol to obtain a solution A;
(2) adding a zeolite molecular sieve into the solution A obtained in the step (1) and uniformly mixing to obtain a suspension B;
(3) putting cordierite porous ceramic into the suspension B obtained in the step (2) at a uniform speed at a descending rate of 0.5-1.5 mm/s, and then pulling the cordierite porous ceramic away from the suspension B at a uniform speed at an ascending and descending rate of 0.5-1.5 mm/s to obtain coated cordierite porous ceramic;
(4) drying the coated cordierite porous ceramic obtained in the step (3), and repeatedly coating for more than 5 times;
(5) roasting the dried cordierite porous ceramic obtained in the step (4) at the temperature of 370-390 ℃ for 3-6 h to obtain an air filtering material;
the specific process parameters are shown in Table 1;
TABLE 1 air Filter Material sample Process parameters
The preparation method of the corresponding zeolite molecular sieve in samples 1-12 comprises the following steps:
s1, uniformly dispersing sodium silicate, sodium aluminate and silicon oxide into deionized water, and stirring for 2 hours to obtain a zeolite synthetic solution;
s2, crystallizing the zeolite synthetic solution at the temperature of 100-120 ℃ for 3-5 hours, and sequentially washing, filtering, drying and screening to obtain a zeolite molecular sieve;
the specific process parameters are shown in Table 2
TABLE 2 Zeolite molecular sieve samples Process parameters
A method for producing a corresponding cordierite porous ceramic of samples 1-12, comprising the steps of:
1) uniformly mixing main materials (talc, kaolin, silicon oxide and aluminum oxide) to obtain a mixture A; based on the mass of the mixture A as 100 wt%, 37-43 wt% of talc, 12-25 wt% of kaolin, 0.1-30 wt% of alumina and 0.1-20 wt% of silicon oxide; the talcum, kaolin, silica and alumina are main materials of cordierite porous ceramics;
2) adding a dispersing agent, a plastic agent and a pore-forming agent into the mixture A, and uniformly stirring to obtain a mixture B; based on the mass of the mixture A as 100 wt%, 0.1-5 wt% of dispersant, 0.1-10 wt% of plastic agent and 0.1-65 wt% of pore-forming agent;
3) adding water and an extrusion aid into the mixture B, and uniformly stirring to obtain pug; based on the mass of the mixture A as 100 wt%, 0.1-10 wt% of extrusion auxiliary agent and 22-26 wt% of water; dispersing agent, plastic agent, pore-forming agent and extrusion auxiliary agent as auxiliary materials;
4) sequentially carrying out ageing, pugging and impurity removal on the pug, then carrying out extrusion forming, and carrying out microwave drying to obtain a ceramic green body;
5) sintering the ceramic green body to obtain cordierite porous ceramic; wherein the sintering method comprises
First-stage temperature rise: heating the mixture from room temperature to 100-180 ℃ at a heating rate of 10-30 ℃/h;
and (3) second-stage heating: raising the temperature to 600-1000 ℃ at a heating rate of 30-50 ℃/h, and preserving the heat for 0.1-12 h;
and (3) three-stage heating: heating to 1320-1435 ℃ at a heating rate of 100-150 ℃/h, and preserving heat for 2-24 h;
the specific process parameters are shown in table 3, the auxiliary materials are shown in table 4, and the specific process parameters of sintering are shown in table 5;
TABLE 3 cordierite porous ceramic sample raw material content
TABLE 4 name of auxiliary materials
TABLE 5 specific Process parameters for sintering
The pore size distribution curve of a sample No. 1 of the pansy porous ceramic carrier is shown in FIG. 1, and as can be seen from FIG. 1, the pore size distribution of the experimentally prepared cordierite porous ceramic is within a range of 0.01-30 μm, but is more concentrated and mainly distributed between 10-20 μm, and through software analysis, the average pore size is 20.45 μm, and the median pore size is 23.56 μm;
the thermal expansion curve of sample No. 5 of the carrier, which is a porous ceramic carrier of pansy, from room temperature to 800 ℃ is shown in FIG. 2. As can be seen from FIG. two, the samples prepared had a coefficient of thermal expansion of 0.5083X 10 in the temperature range of room temperature to 800 deg.C-6K-1；
The XRD pattern of the No. 8 sample of the cordierite porous ceramic carrier in the embodiment is shown in FIG. 3, and as can be seen from FIG. 3, the prepared material is a cordierite phase and no other impurity phase is generated by comparing with a cordierite standard card;
the SEM image of sample No. 12 of the air filter material of this example is shown in fig. 4, and it can be seen from fig. 4 that the zeolite molecular sieves are uniformly distributed on the surface of the cordierite porous ceramic, and the zeolite molecular sieves are also uniformly distributed in the channels of the cordierite porous ceramic;
the physical property characterization results of the air filter material samples of No. 1-12 in the examples are shown in Table 6;
TABLE 6 air filtration material sample Performance characterization results
While the present invention has been described in detail with reference to the specific embodiments thereof, the present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The preparation method of the air filter material based on the pansy porous ceramic and the zeolite is characterized by comprising the following specific steps of:
(1) uniformly mixing polyvinyl alcohol and distilled water, and stirring at 85-95 ℃ to dissolve the polyvinyl alcohol to obtain a solution A;
(2) adding a zeolite molecular sieve into the solution A obtained in the step (1) and uniformly mixing to obtain a suspension B;
(3) putting cordierite porous ceramic into the suspension B obtained in the step (2) at a uniform speed at a descending rate of 0.5-1.5 mm/s, and then pulling the cordierite porous ceramic away from the suspension B at a uniform speed at an ascending and descending rate of 0.5-1.5 mm/s to obtain coated cordierite porous ceramic;
(4) drying the coated cordierite porous ceramic obtained in the step (3), and repeatedly coating for more than 3 times;
(5) and (5) roasting the dried cordierite porous ceramic obtained in the step (4) at the temperature of 370-390 ℃ for 3-6 h to obtain the air filtering material.
2. The method of claim 1, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: the mass ratio of the polyvinyl alcohol to the distilled water in the step (1) is 1: 30-50.
3. The method of claim 1, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: and (3) the mass concentration of the zeolite molecular sieve in the suspension B in the step (2) is 0.025-0.1 g/mL.
4. The method of claim 1, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: the preparation method of the zeolite molecular sieve in the step (2) comprises the following steps:
s1, uniformly dispersing sodium silicate, sodium aluminate and silicon oxide into deionized water, and stirring for 2-3 hours to obtain a zeolite synthetic solution;
s2, crystallizing the zeolite synthetic liquid at the temperature of 100-120 ℃ for 3-5 hours, and sequentially washing, filtering, drying and screening to obtain the zeolite molecular sieve.
5. The method of claim 4, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: the zeolite molecular sieve has a molar ratio of alumina to silica to sodium oxide of 1: 1-3: 8-9.
6. The method of claim 1, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: the preparation method of the cordierite porous ceramic in the step (3) comprises the following steps:
1) uniformly mixing talc, kaolin, silicon oxide and alumina to obtain a mixture A;
2) adding a dispersing agent, a plastic agent and a pore-forming agent into the mixture A, and uniformly stirring to obtain a mixture B;
3) adding water and an extrusion aid into the mixture B, and uniformly stirring to obtain pug;
4) sequentially carrying out ageing, pugging and impurity removal on the pug, then carrying out extrusion forming, and carrying out microwave drying to obtain a ceramic green body;
5) and sintering the ceramic green body to obtain the cordierite porous ceramic.
7. The method of claim 6, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: based on the mass of the mixture A as 100 wt%, 37-43 wt% of talc, 12-25 wt% of kaolin, 0.1-30 wt% of alumina and 0.1-20 wt% of silicon oxide; 0.1 to 5 weight percent of dispersant, 0.1 to 10 weight percent of extrusion assistant, 0.1 to 10 weight percent of plastic agent, 0.1 to 65 weight percent of pore-forming agent and 22 to 26 weight percent of water.
8. The method of claim 7, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: the dispersing agent is one or more of oleic acid, stearic acid and sodium stearate, the plasticizer is one or more of graphite, cellulose, polyvinyl alcohol and wheat flour, the pore-forming agent is one or more of potato starch, graphite, shell powder, wood chips, PMMA microspheres and corn starch, and the extrusion auxiliary agent is one or more of oleic acid, lauric acid, glycerol, linseed oil and rapeseed oil.
9. The method of claim 8, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: the talc is a platy structure talc, and the content of iron oxide in the talc is not higher than 1 wt%, and the total content of calcium oxide, sodium oxide and potassium oxide in the talc is not higher than 0.6 wt%; the kaolin is one or more of calcined kaolin, water-washed kaolin and raw kaolin; the silicon oxide is one or more of fused silicon oxide and spherical silicon oxide; the alumina is one or more of alpha-alumina, gamma-alumina and boehmite.
10. The method of claim 6, wherein the air filter material is made from a porous ceramic and a zeolite that are panzelite-based, and wherein: the method for preparing the cordierite porous ceramic comprises the following specific steps of step 5) roasting:
sequentially heating from room temperature to 100-180 ℃ at a heating rate of 10-30 ℃/h; raising the temperature to 600-1000 ℃ at a heating rate of 30-50 ℃/h, and preserving the heat for 0.1-12 h; heating to 1320-1435 ℃ at a heating rate of 100-150 ℃/h, and preserving heat for 2-24 h.
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| CN115849947A (en) * | 2022-11-28 | 2023-03-28 | 中国地质大学（北京） | Cordierite porous ceramic material with three-dimensional communication structure and preparation method thereof |
| CN116063095A (en) * | 2023-03-06 | 2023-05-05 | 山东奥福环保科技股份有限公司 | Thin-wall cordierite honeycomb ceramic filter with large median pore diameter and preparation method and application thereof |
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| CN115849947A (en) * | 2022-11-28 | 2023-03-28 | 中国地质大学（北京） | Cordierite porous ceramic material with three-dimensional communication structure and preparation method thereof |
| CN116063095A (en) * | 2023-03-06 | 2023-05-05 | 山东奥福环保科技股份有限公司 | Thin-wall cordierite honeycomb ceramic filter with large median pore diameter and preparation method and application thereof |
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