CN109224874A - Catalytic membrane for air purification and preparation method thereof - Google Patents
Catalytic membrane for air purification and preparation method thereof Download PDFInfo
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- CN109224874A CN109224874A CN201811305344.8A CN201811305344A CN109224874A CN 109224874 A CN109224874 A CN 109224874A CN 201811305344 A CN201811305344 A CN 201811305344A CN 109224874 A CN109224874 A CN 109224874A
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- 239000012528 membrane Substances 0.000 title claims abstract description 81
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 238000004887 air purification Methods 0.000 title abstract description 3
- 239000000463 material Substances 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 26
- 239000003054 catalyst Substances 0.000 claims abstract description 22
- 229910016978 MnOx Inorganic materials 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 31
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 28
- 238000004140 cleaning Methods 0.000 claims description 15
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Natural products CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 125000005909 ethyl alcohol group Chemical group 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 239000008187 granular material Substances 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract 1
- 239000011259 mixed solution Substances 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000013618 particulate matter Substances 0.000 description 9
- 238000006555 catalytic reaction Methods 0.000 description 7
- 238000003760 magnetic stirring Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229940035429 isobutyl alcohol Drugs 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
-
- 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
-
- 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
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/2073—Manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/10—Catalysts being present on the surface of the membrane or in the pores
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Catalysts (AREA)
Abstract
The invention relates to a catalytic membrane for air purification and a preparation method thereof.A MnOx catalyst is loaded on the surface of a membrane material microstructure unit by adopting an in-situ growth method and has the advantages of large specific surface area, high low-temperature catalytic activity, good bonding property of the catalyst and the membrane material microstructure unit and the like. The preparation process comprises the steps of firstly soaking a membrane material by using a low surface energy solvent, then placing the membrane material into a mixed solution of potassium permanganate and aerobic acid, then carrying out water bath treatment, and finally washing to obtain the membrane material with catalytic performance. The catalytic membrane prepared by the method has the advantages of large specific surface area, good combination of the catalyst and the membrane material microstructure units, excellent low-temperature catalytic activity, excellent dust interception performance, simple preparation process of the MnOx catalytic membrane, easy regulation and control of preparation parameters, convenience for large-scale production and extremely high practical application value.
Description
Technical field
The invention belongs to be catalyzed field of membrane preparation, and in particular to a kind of for the catalytic membrane of gas purification and its preparation side
Method.
Background technique
In recent years, with the rapid development of industry and a large amount of uses of fossil fuel, air pollution problems inherent becomes increasingly conspicuous.People
Various pollutants are discharged to air in class production, life activity or nature, and content has been more than the bearing capacity of environment, makes air
Obvious deteriorate occurs for quality.Dust, NOx, formaldehyde, VOCs become one of primary pollution source of air pollution, people can be seriously affected
Class health.In view of the above-mentioned problems, for solid particulate matter, NO in airx, formaldehyde, the gas such as VOCs, solid contaminant
Comprehensive treatment is one of the technical problem for needing to capture instantly.
In the prior art, 107475795 A of Chinese invention patent CN passes through polytetrafluoroethyldispersion dispersion resin and manganese systems low temperature
After catalyst and aviation kerosine are mixed and stirred for, through pre-molding, pushing forming, then split through drying, sintering, drawing-off, film,
The processes such as combing, winding make short fibre at silk.The polytetrafluoroethylene fibre has the function of dedusting denitration, and denitrating catalyst distribution is equal
Even, denitrification rate is high.But the denitrating catalyst major part activated centre of such method production is wrapped in fiber, catalyst
Specific surface area is small, and utilization rate is not high, and required temperature is higher in catalytic reaction process, and energy consumption is high, and preparation process cost senior engineer
Skill is cumbersome.Chinese invention patent CN 107570138A by by metal oxide or noble-metal-supported in elastic TiO2It is ceramic fine
In dimension, denitration performance is made it have.The invention effectively prevents the active component of catalysis material and the phenomenon that carrier is embedded, and mentions
High catalysis material carries out active site quantity when catalysis reaction.But the product of such method preparation, catalyst and carrier
Associativity it is not high, and higher cost is not easy to realize industrial production and applies.
Summary of the invention
The purpose of the present invention is to provide a kind of MnO for air cleaningxCatalytic membrane and preparation method thereof, MnOxCatalysis
Agent is supported on membrane material microstructure unit surface using in situ synthesis, has large specific surface area, and low-temperature catalytic activity is high, catalysis
The advantages that agent and membrane material microstructure unit associativity are good, can be achieved at the same time gas solid separation and gaseous pollutant is degraded.It can apply
It is retained while the fields such as industrial flue gas cleaning, purifying vehicle exhaust, indoor air purification, catalytic degradation NOx, VOCs gas
Solid particulate matter.
The technical solution of the present invention is as follows:
A kind of MnO for air cleaningxCatalytic membrane, membrane material microstructure unit area load have petal-shaped, flakey, piece
The MnO of shape, needle-shaped, granular one or more patternsxCatalyst.The membrane material is SiC ceramic membrane material, glass fibers
Tie up covering material, polyester covering material, PTFE covering material, PPS covering material.The microstructure unit is SiC ceramic film
Hole path, glass fibre, polyester fiber, PTFE fiber, PPS fiber are accumulated between grain and particle.
A kind of MnO for air cleaningxThe preparation method of catalytic membrane, preparation process the following steps are included:
(1) membrane material is placed in low-surface-energy solvent and infiltrates certain time, the low-surface-energy solvent is ethyl alcohol, isobutyl
Alcohol, water, the min of infiltrating time 5s ~ 30；
(2) certain density potassium permanganate solution is configured, oxyacid is added, configures certain density oxyacid potassium permanganate water
Solution, potassium permanganate mass fraction is 1 ~ 10% wt in potassium permanganate solution, and oxyacid is nitric acid, sulfuric acid or phosphoric acid, oxygen-containing
Acid mass fraction is 1 ~ 8%wt；
(3) step (1) resulting membrane material is fixed with fixture, vertical suspension is impregnated in the solution of step (2) configuration, one
Determine to handle certain time at temperature, the treatment temperature is 60 ~ 90 DEG C, and the processing time is 0.5 ~ 7h.
(4) membrane material that step (3) processing is completed is placed in deionized water, ultrasonic cleaning is dried one afterwards several times
It fixes time, ultrasonic cleaning number is 1 ~ 10 time, and being dried temperature is 60 ~ 95 DEG C, 2 ~ 6h of drying time.
Beneficial effects of the present invention: MnOx catalyst is supported on membrane material microstructure unit surface using in situ synthesis,
High with membrane material binding strength, specific surface area of catalyst is big, strong to the removal ability of gaseous pollutant, can remove in air simultaneously
Particulate matter.MnOxCatalytic membrane preparation process is simple, preparation parameter easy-regulating, is convenient for large-scale production.
Detailed description of the invention
Fig. 1 is that petal-shaped made from embodiment 1 is catalyzed membrane structure electromicroscopic photograph.
Fig. 2 is that needle-shaped made from embodiment 2 and sheet is catalyzed membrane structure electromicroscopic photograph.
Fig. 3 is that needle-shaped made from embodiment 3 and petal-shaped is catalyzed membrane structure electromicroscopic photograph.
Fig. 4 is particulate catalytic membrane structure electromicroscopic photograph made from embodiment 4.
Fig. 5 is that flakey made from embodiment 5 is catalyzed membrane structure electromicroscopic photograph.
Fig. 6 is that petal-shaped made from embodiment 6 is catalyzed membrane structure electromicroscopic photograph.
Fig. 7 is that petal-shaped catalytic membrane made from embodiment 6 characterizes the catalytic performance of NOx.
Specific embodiment
The present invention is done below with reference to embodiment and is further explained, the following example is merely to illustrate the present invention, but
It is not used to limit practical range of the invention.
Embodiment 1
MnO for air cleaningxCatalytic membrane, membrane material microstructure unit area load have the MnO of petal-shaped patternxCatalysis
Agent.Membrane material be polyester covering material, preparation method the following steps are included:
(1) the polyester covering material that aperture is 5 μm is put into ethanol solution and infiltrates 5s.
(2) potassium permanganate solution that mass fraction is 1% is stirred evenly with magnetic stirring apparatus, revolving speed is 300 r/
Min is added nitric acid and stirs evenly with potassium permanganate solution, nitric acid mass fraction 1%.
(3) it will be put into the potassium permanganate nitric acid solution of step (2) through step (1) processed diaphragm, water bath processing, water
60 DEG C of bath temperature, water bath time 0.5h.
(4) it will be cleaned by ultrasonic 1 time through diaphragm deionized water obtained by step (3), and be put into baking oven and be dried, do
Dry temperature is 60 DEG C, drying time 2h.
The catalytic membrane electron microscope of preparation is as shown in Figure 1, it can be seen that polyester covering material fibre structure keeps stablizing, fiber
Upper uniformly cladding petal-shaped catalyst.Prepared catalytic membrane is higher than 99% to the removal rate of PM2.5 particulate matter, the removal to VOC
Rate is higher than 90%.
Embodiment 2
For the MnOx catalytic membrane of air cleaning, membrane material microstructure unit area load has the MnOx of needle-shaped and sheet mixing to urge
Agent.Membrane material be PTFE covering material, preparation method the following steps are included:
(1) the PTFE covering material that aperture is 5 μm is put into aqueous solution and is infiltrated, infiltrating time 30min.
(2) potassium permanganate solution that mass fraction is 10% is stirred evenly with magnetic stirring apparatus, revolving speed is 300 r/
Min is added sulfuric acid and stirs evenly with potassium permanganate solution, sulfuric acid mass fraction 8%.
(3) it will be put into the potassium permanganate sulfuric acid solution of step (2) through step (1) processed diaphragm, water bath processing, water
90 DEG C of bath temperature, water bath time 7h.
(4) it will be cleaned by ultrasonic 10 times through diaphragm deionized water obtained by step (3), and be put into baking oven and be dried,
Drying temperature is 95 DEG C, drying time 6h.
The catalytic membrane electron microscope of preparation is as shown in Fig. 2, catalyst is in granular form with rodlike mixed distribution in PTFE overlay film material
Expect on film surface.Prepared catalytic membrane is higher than 99.9% to the removal rate of PM2.5 particulate matter, is higher than 95% to the removal rate of VOC.
Embodiment 3
For the MnOx catalytic membrane of air cleaning, membrane material microstructure unit area load has the MnOx of needle-shaped and petal-shaped mixing
Catalyst.Membrane material be fiberglass overlay film material, preparation method the following steps are included:
(1) the fiberglass overlay film material that aperture is 3 μm is put into isobutanol solution and is infiltrated, infiltrating time 5min.
(2) potassium permanganate solution that mass fraction is 5% is stirred evenly with magnetic stirring apparatus, revolving speed 200r/min,
Phosphoric acid is added to stir evenly with potassium permanganate solution, phosphoric acid quality score 5%.
(3) it will be put into the potassium permanganate phosphoric acid solution of step (2) through step (1) processed diaphragm, water bath processing, water
70 DEG C of bath temperature, water bath time 2h.
(4) it will be cleaned by ultrasonic 5 times through diaphragm deionized water obtained by step (3), and be put into baking oven and be dried, do
Dry temperature is 80 DEG C, drying time 3h.
The catalytic membrane electron microscope of preparation is as shown in figure 3, catalyst is covered in needle-shaped and petal-shaped mixed distribution in glass fibre
On membrane material film surface.Prepared catalytic membrane is higher than 99% to the removal rate of PM2.5 particulate matter, to NOXRemoval rate be higher than 90%.
Embodiment 4
For the MnOx catalytic membrane of air cleaning, membrane material microstructure unit area load has granular MnOx catalyst.Film
Material be PPS covering material, preparation method the following steps are included:
(1) the PPS covering material that aperture is 2 μm is put into isobutanol solution and is infiltrated, infiltrating time 1min.
(2) potassium permanganate solution that mass fraction is 6% is stirred evenly with magnetic stirring apparatus, revolving speed 400r/min,
Phosphoric acid is added to stir evenly with potassium permanganate solution, phosphoric acid quality score 4%.
(3) it will be put into the potassium permanganate phosphoric acid solution of step (2) through step (1) processed diaphragm, water bath processing, water
85 DEG C of bath temperature, water bath time 6h.
(4) it will be cleaned by ultrasonic 8 times through diaphragm deionized water obtained by step (3), and be put into baking oven and be dried, do
Dry temperature is 75 DEG C, drying time 4.5h.
The catalytic membrane electron microscope of preparation is distributed in the fiber film-coated material film surface of PPS as shown in figure 4, catalyst is in granular form
On.Prepared catalytic membrane is higher than 99.9% to the removal rate of PM2.5 particulate matter, to NOXRemoval rate be higher than 90%.
Embodiment 5
For the MnOx catalytic membrane of air cleaning, membrane material microstructure unit area load has squamaceous MnOx catalyst.Film
Material be PPS covering material, preparation method the following steps are included:
(1) the PPS covering material that aperture is 5 μm is put into isobutanol solution and is infiltrated, infiltrating time 2min.
(2) potassium permanganate solution that mass fraction is 6% is stirred evenly with magnetic stirring apparatus, revolving speed 300r/min,
Phosphoric acid is added to stir evenly with potassium permanganate solution, phosphoric acid quality score 4%.
(3) it will be put into the potassium permanganate phosphoric acid solution of step (2) through step (1) processed diaphragm, water bath processing, water
75 DEG C of bath temperature, water bath time 4h.
(4) it will be cleaned by ultrasonic 8 times through diaphragm deionized water obtained by step (3), and be put into baking oven and be dried, do
Dry temperature is 85 DEG C, drying time 4.5h.
The catalytic membrane electron microscope of preparation is as shown in figure 5, catalyst is distributed in the fiber film-coated material film surface of PPS in flakey
On.Prepared catalytic membrane is higher than 99% to the removal rate of PM2.5 particulate matter, to NOXRemoval rate be higher than 90%.
Embodiment 6
For the MnOx catalytic membrane of air cleaning, membrane material microstructure unit area load has petal-like MnOx catalyst.Film
Material be SiC membrane material, preparation method the following steps are included:
(1) the SiC film membrane material that aperture is 4 μm is put into ethyl alcohol alcoholic solution and is infiltrated, infiltrating time 10min.
(2) potassium permanganate solution that mass fraction is 9% is stirred evenly with magnetic stirring apparatus, revolving speed 200r/min,
Phosphoric acid is added to stir evenly with potassium permanganate solution, phosphoric acid quality score 5%.
(3) it will be put into the potassium permanganate phosphoric acid solution of step (2) through step (1) processed diaphragm, water bath processing, water
85 DEG C of bath temperature, water bath time 6h.
(4) it will be cleaned by ultrasonic 5 times through diaphragm deionized water obtained by step (3), and be put into baking oven and be dried, do
Dry temperature is 95 DEG C, drying time 6h.
The catalytic membrane electron microscope of preparation is distributed in SiC membrane material surface as shown in fig. 6, catalyst is in granular form, prepared
Catalytic membrane NOx catalytic degradation performance it is as shown in Figure 7.Prepared catalytic membrane is higher than the removal rate of PM2.5 particulate matter
99.9%, to NOXRemoval rate be higher than 90%.
Claims (8)
1. a kind of MnO for air cleaningxCatalytic membrane, which is characterized in that membrane material microstructure unit area load has petal
Shape, flakey, sheet, needle-shaped, granular one or more patterns MnOxCatalyst.
2. the MnO according to claim 1 for air cleaningxCatalytic membrane, which is characterized in that the membrane material is SiC
Ceramic membrane materials, fiberglass overlay film material, polyester covering material, PTFE covering material, PPS covering material.
3. the MnO according to claim 1 for air cleaningxCatalytic membrane, which is characterized in that the microstructure unit is
Hole path, glass fibre, polyester fiber, PTFE fiber, PPS fiber are accumulated between SiC ceramic membrane granule and particle.
4. a kind of MnO for air cleaningxThe preparation method of catalytic membrane, which is characterized in that preparation process the following steps are included:
(1) membrane material is placed in low-surface-energy solvent and infiltrates certain time；
(2) certain density potassium permanganate solution is configured, oxyacid is added, configures certain density oxyacid potassium permanganate water
Solution；
(3) step (1) resulting membrane material is fixed with fixture, vertical suspension is impregnated in the solution of step (2) configuration, one
Determine to handle certain time at temperature；
(4) membrane material that step (3) processing is completed is placed in deionized water, ultrasonic cleaning is dried a timing afterwards several times
Between.
5. MnO according to claim 4xIt is catalyzed membrane preparation method, which is characterized in that low-surface-energy as described in step (1)
Solvent is ethyl alcohol, isobutanol, water, the min of infiltrating time 5s ~ 30.
6. MnO according to claim 4xIt is catalyzed membrane preparation method, which is characterized in that permanganic acid described in step (2)
Potassium permanganate mass fraction is 1 ~ 10% wt in aqueous solutions of potassium, and oxyacid is nitric acid, sulfuric acid or phosphoric acid, and oxygen-containing acid mass fraction is
1~8%wt。
7. MnO according to claim 4xIt is catalyzed membrane preparation method, which is characterized in that treatment temperature described in step (3)
It is 60 ~ 90 DEG C, the processing time is 0.5 ~ 7h.
8. MnO according to claim 4xIt is catalyzed membrane preparation method, which is characterized in that ultrasonic cleaning described in step (4)
Number is 1 ~ 10 time, and being dried temperature is 60 ~ 95 DEG C, 2 ~ 6h of drying time.
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| CN201811305344.8A CN109224874A (en) | 2018-11-05 | 2018-11-05 | Catalytic membrane for air purification and preparation method thereof |
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| CN201811305344.8A CN109224874A (en) | 2018-11-05 | 2018-11-05 | Catalytic membrane for air purification and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759053A (en) * | 2019-01-21 | 2019-05-17 | 北京工业大学 | A kind of preparation method of filter cloth load vanadium titanium-based catalytic denitration material |
| CN111501347A (en) * | 2019-01-30 | 2020-08-07 | 宁波方太厨具有限公司 | Preparation method of catalytic nanofiber |
| CN111495213A (en) * | 2019-01-30 | 2020-08-07 | 宁波方太厨具有限公司 | Preparation method of nanofiber filtering membrane |
| CN111495172A (en) * | 2019-01-30 | 2020-08-07 | 宁波方太厨具有限公司 | Preparation method of composite nanofiber filtering membrane |
| CN113000064A (en) * | 2021-03-05 | 2021-06-22 | 南京工业大学 | Preparation method of catalytic membrane for low-temperature denitration |
| CN113181763A (en) * | 2021-01-28 | 2021-07-30 | 广东风和洁净工程有限公司 | VOC removing device for hollow fiber membrane fixed bed |
| CN113198461A (en) * | 2021-04-20 | 2021-08-03 | 上海师范大学 | Nano MnO2PTFE composite material and preparation method and application thereof |
| CN113713627A (en) * | 2021-08-13 | 2021-11-30 | 清华大学 | Ceramic ultrafiltration membrane with catalytic function and preparation method and application thereof |
| CN115608342A (en) * | 2022-12-02 | 2023-01-17 | 格林斯达(北京)环保科技股份有限公司 | Composite purifying material and preparation method and application thereof |
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|---|---|---|---|---|
| CN109759053A (en) * | 2019-01-21 | 2019-05-17 | 北京工业大学 | A kind of preparation method of filter cloth load vanadium titanium-based catalytic denitration material |
| CN111501347A (en) * | 2019-01-30 | 2020-08-07 | 宁波方太厨具有限公司 | Preparation method of catalytic nanofiber |
| CN111495213A (en) * | 2019-01-30 | 2020-08-07 | 宁波方太厨具有限公司 | Preparation method of nanofiber filtering membrane |
| CN111495172A (en) * | 2019-01-30 | 2020-08-07 | 宁波方太厨具有限公司 | Preparation method of composite nanofiber filtering membrane |
| CN111501347B (en) * | 2019-01-30 | 2021-12-24 | 宁波方太厨具有限公司 | Preparation method of catalytic nanofiber |
| CN113181763A (en) * | 2021-01-28 | 2021-07-30 | 广东风和洁净工程有限公司 | VOC removing device for hollow fiber membrane fixed bed |
| CN113181763B (en) * | 2021-01-28 | 2022-06-03 | 广东风和洁净工程有限公司 | PTFE material hollow fiber membrane fixed bed VOC removal device |
| CN113000064A (en) * | 2021-03-05 | 2021-06-22 | 南京工业大学 | Preparation method of catalytic membrane for low-temperature denitration |
| CN113198461A (en) * | 2021-04-20 | 2021-08-03 | 上海师范大学 | Nano MnO2PTFE composite material and preparation method and application thereof |
| CN113713627A (en) * | 2021-08-13 | 2021-11-30 | 清华大学 | Ceramic ultrafiltration membrane with catalytic function and preparation method and application thereof |
| CN115608342A (en) * | 2022-12-02 | 2023-01-17 | 格林斯达(北京)环保科技股份有限公司 | Composite purifying material and preparation method and application thereof |
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