CN110302741A - A kind of gas purification particle and the preparation method and application thereof - Google Patents
A kind of gas purification particle and the preparation method and application thereof Download PDFInfo
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- CN110302741A CN110302741A CN201910638314.7A CN201910638314A CN110302741A CN 110302741 A CN110302741 A CN 110302741A CN 201910638314 A CN201910638314 A CN 201910638314A CN 110302741 A CN110302741 A CN 110302741A
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- 238000000746 purification Methods 0.000 title claims abstract description 72
- 239000002245 particle Substances 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 22
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000001354 calcination Methods 0.000 claims abstract description 13
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 12
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 11
- 239000004312 hexamethylene tetramine Substances 0.000 claims abstract description 11
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims abstract description 11
- 231100000719 pollutant Toxicity 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 229910006415 θ-Al2O3 Inorganic materials 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 74
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 23
- 239000000243 solution Substances 0.000 description 18
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 10
- 239000011259 mixed solution Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 5
- 229910003158 γ-Al2O3 Inorganic materials 0.000 description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 206010006451 bronchitis Diseases 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 208000017667 Chronic Disease Diseases 0.000 description 1
- 102000001554 Hemoglobins Human genes 0.000 description 1
- 108010054147 Hemoglobins Proteins 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000003130 cardiopathic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 206010039083 rhinitis Diseases 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- -1 sulfate radical Chemical class 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—Sulfur 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
- B01D53/86—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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8634—Ammonia
-
- 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
- B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
- B01J20/28061—Surface area, e.g. B.E.T specific surface area being in the range 100-500 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28078—Pore diameter
- B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
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- B01J35/615—
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- B01J35/647—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/209—Other metals
- B01D2255/2092—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4806—Sorbents characterised by the starting material used for their preparation the starting material being of inorganic character
Abstract
The present invention provides a kind of gas purification particles and the preparation method and application thereof, belong to pollution processing technology field.The gas purification specific grain surface is larger, and average pore size is smaller, and preparation method includes the following steps: by containing aluminum nitrate and solution be heated to being subsequently dried and calcining in gel.Auxiliary agent includes hexamethylenetetramine.The preparation method is simple, easy to operate, and the stable gas purification particle of performance can be made.It is used for above-mentioned gas purification particle to adsorb conversion pollutant, can effectively adsorb and catalyzed conversion NO2、SO2Or NH3Polluted gas inside purifies air.
Description
Technical field
The present invention relates to pollution processing technology fields, in particular to a kind of gas purification particle and preparation method thereof
With application.
Background technique
With the rapid development of economy, pollution problem is got growing concern for, especially indoor air quality is received
Unprecedented attention.Existing research is essentially around room atmosphere particulate matter and fits up the pollutants such as formaldehyde, and rare pass
The indoor SO for deriving from outside atmosphere of note2And NO2These normal atmospheric pollutants, and the polluted gas from interior itself
NH3。
In fact, SO much regional in China2And NO2Also National Environmental air quality secondary standard is often exceeded, especially
In northern heating period, SO2And NO2Even can be exceeded several times or more.
SO2The respiratory system of people is stimulated, sucking contains SO2Air can make one to occur burnout, out of strength, rhinitis, sphagitis and
The symptoms such as bronchitis, lung have chronic disease and cardiopathic the elderly most vulnerable.
NO2It is to form one of principal element of photochemical fog, acute respiratory disease can be caused, it is demonstrated experimentally that in NO2
Daily concentration is 0.13-0.17mg/m3Under conditions of pass through 6 months, the bronchitis disease incidence of children increased.
NH3There are corrosion and stimulation to the skin histology of contact, be easy to enter blood by alveolar after sucking human body,
In conjunction with hemoglobin, fortune oxygen function is destroyed.
Summary of the invention
The first object of the present invention includes providing a kind of gas purification particle, and the gas purification specific grain surface is larger, is put down
Equal aperture is smaller.
The second object of the present invention includes providing a kind of preparation method of above-mentioned gas purification particle, preparation method letter
It is single, it is easy to operate, the stable gas purification particle of performance can be made.
The third object of the present invention includes providing a kind of application of above-mentioned gas purification particle, such as can be used for inhaling
Attached conversion includes NO2、SO2Or NH3Pollutant inside.
The present invention solves its technical problem and adopts the following technical solutions to realize:
The present invention proposes a kind of gas purification particle, specific surface area 300-350m2/ g and/or average pore size are 7-
7.5nm。
It include γ-Al in the gas purification particle2O3And θ-Al2O3。
It is preferably carried out in mode some, γ-Al is only contained in the gas purification particle2O3And θ-Al2O3。
The invention also provides a kind of preparation methods of above-mentioned gas purification particle, comprising the following steps:
By containing aluminum nitrate and solution be heated to being subsequently dried and calcining in gel.
In some embodiments, auxiliary agent is contained in above-mentioned solution, auxiliary agent includes hexamethylenetetramine.
In addition, the invention also provides a kind of applications of above-mentioned gas purification particle, such as absorption conversion can be used for
Pollutant, pollutant include SO2、NO2And NH3At least one of polluted gas.
The beneficial effect of gas purification particle provided by the present application and the preparation method and application thereof includes:
Gas purification specific grain surface provided by the present application is larger, and average pore size is smaller, includes in the gas purification particle
γ-Al2O3And θ-Al2O3, to NO2、SO2Or NH3Polluted gas inside has good absorption transformation.Its preparation side
Method is simple, easy to operate, and the stable gas purification particle of performance, and the preparation method environmental sound, odorless, nothing can be made
Taste will not cause secondary pollution to air.By above-mentioned gas purification particle be used to adsorb conversion pollutant, can effectively adsorb and
Catalyzed conversion NO2、SO2Or NH3Polluted gas inside purifies air.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Gas purification particle provided by the embodiments of the present application and the preparation method and application thereof is specifically described below.
Gas purification particle provided by the present application is a kind of gas purification with preferable absorption and catalyzed conversion effect
Grain.The specific surface area of the gas purification particle is generally 300-350m2/ g, average pore size are generally 7-7.5nm.
Optionally, the specific surface area of gas purification particle for example can be 300m2/g、310m2/g、320m2/g、
330m2/g、340m2/ g or 350m2/ g etc., or 305m2/g、315m2/g、325m2/g、335m2/ g or 345m2/ g etc., also
It can be 300-350m2Other any specific surface area values in/g range.
Optionally, the average pore size of gas purification particle for example can for 7nm, 7.1nm, 7.2nm, 7.3nm,
7.4nm or 7.5nm, or 7.05nm, 7.15nm, 7.25nm, 7.35nm or 7.45nm etc. can also be 7-7.5nm model
Enclose interior other any aperture values.
In some embodiments, above-mentioned gas purifies the white graininess of particle.
In the application, gas purification particle includes γ-Al2O3And θ-Al2O3.It is preferably carried out in mode some, gas
Body purification particle only contains γ-Al2O3And θ-Al2O3。
Inventors have found that for more existing conventional gas purification particle, it is provided by the present application that there is above-mentioned crystal form, compare table
Area and the gas purification particle of average pore size are in a higher level, to NO2、SO2And NH3All have it is good absorption and
Catalyzed conversion effect.
In addition, the application also provides a kind of preparation method of above-mentioned gas purification particle, such as may comprise steps of:
By containing aluminum nitrate and solution be heated to being subsequently dried and calcining in gel.
In some embodiments, auxiliary agent is contained in solution, auxiliary agent for example may include hexamethylenetetramine.
In some embodiments, in solution the mass content of aluminum nitrate for example can be 15-40%, such as 15%,
20%, 25%, 30%, 35% or 40% etc..
In some embodiments, the mass content of auxiliary agent for example may be 15-40% in solution, such as 15%,
20%, 25%, 30%, 35% or 40% etc..
Aluminum nitrate and auxiliary agent can be stirred by blender, so that aluminum nitrate, auxiliary agent are sufficiently mixed in the solution, and be made
Particulate matter therein is completely dissolved.
Further, solution is heated.
Optionally, heating for example can be in 45-55 DEG C, such as at 45 DEG C, 48 DEG C, 50 DEG C, 52 DEG C or 55 DEG C temperature
It carries out.Heating time for example can be 25-35min, such as 25min, 28min, 30min, 32min or 35min.Preferably, add
Heat carries out 30min under conditions of 50 DEG C.
In some embodiments, heating can be is carried out in the form of tepidarium, and the water temperature of warm water is then controlled above-mentioned
45-55 DEG C within the scope of.
In some preferred embodiments, also constantly mixed solution is stirred in heating process, so that mixing is molten
Liquid shows uniform gel.
By that will heat containing the solution of aluminum nitrate and auxiliary agent, hexamethylenetetramine can be made to decomposite NH3, then mix molten
Particle in liquid system gradually polymerize during heating, forms gel.
Further, resulting gel is dried.
Optionally, it is dry for example can in 80-120 DEG C, such as 80 DEG C, 85 DEG C, 90 DEG C, 95 DEG C, 100 DEG C, 105 DEG C,
It is carried out at the temperature such as 110 DEG C, 115 DEG C or 120 DEG C.Drying time for example can be 11.5-12.5h, such as 11.5h, 12h or
12.5h etc..Preferably, drying carries out 12h under conditions of 120 DEG C.
It is worth noting that the gel being dried preferably is in the gel of complete gel state.
In some embodiments, drying process can carry out in baking oven.
Gel after drying is in solid gel state, in some preferred embodiments, moisture content in solid gel
Almost 0.
Further, solid gel is calcined.
Optionally, calcining for example can in 500-800 DEG C, such as 500 DEG C, 550 DEG C, 600 DEG C, 650 DEG C, 700 DEG C,
It is carried out at the temperature such as 750 DEG C or 800 DEG C.Calcination time for example can be 2.5-3.5h, such as 2.5h, 3h or 3.5h.Preferably,
It calcines and carries out 3h under conditions of 600 DEG C.
Inventors have found that calcination temperature will affect the crystal form and performance of gas purification grains object, calcination temperature exists
At 500-800 DEG C, obtained Al2O3Contain γ-Al2O3And θ-Al2O3.When calcination temperature is lower than 1000 DEG C, with the liter of temperature
Height, gas purification grain grow the orderly of slower aluminium ion sublattice in tetrahedron and octahedral interstice
Degree improves, and corresponding lattice defect gradually decreases.Though temperature raising will increase reactivity, calcination temperature is more than after 800 DEG C
Sintering phenomenon can occurs in it, be unfavorable for obtaining the gas purification particle of required performance.
In addition, preparing resulting gas purification specific grain surface product through above-mentioned entire preparation process is 300-350m2/ g is put down
Equal aperture is 7-7.5nm.
In some embodiments, above-mentioned calcination process can carry out in Muffle furnace.
It holds, the preparation method of gas purification particle provided by the present application is simple, and the chemical reagent used is few, to environment friend
It is good, and synthesis process is mild, safety, and stability is good.Raw material reasonably is prepared by selecting, in addition specific heating, drying
And calcine technology, it can effectively prepare the gas purification that specific crystal formation, specific specific surface area and average pore size are 7-7.5nm
Grain.
In addition, being found for a long time through inventor, above-mentioned gas present invention also provides a kind of application of above-mentioned gas purification particle
Body purifies particle for NO2、SO2Or NH3Polluted gas inside has preferably absorption and catalyzed conversion effect, therefore it is available
Include NO in absorption2、SO2And NH3At least one of polluted gas pollutant.
The absorption principle of above-mentioned polluted gas includes the following:
Under low consistency conditions, NO2Al can be first adsorbed on2O3Surface reaction generates nitrite, and the nitrous acid on surface reaches one
Quantitative (High Concentration Situation) can form nitre by Langmuir-Hinshelwood (L-H) or Eley-Rideal (E-R) mechanism
The NO or Al of hydrochlorate and gas phase2O3The nitrite and NO on surface2It reacts and generates nitrate and NO.
SO2In Al2O3Sulphite is hydrolyzed to form on the Lacking oxygen or hydroxyl group sites of surface alkalinty, then in light or oxidation
Agent (such as O3Or NO2) under the action of further oxidation be generated as sulfate.
By test, after adsorbing 3h, the surface of every g gas purification particle produces the NO of 0.1985-5.795mg3 -Or
7.552-20.5215mg SO4 2-。
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
The present embodiment provides a kind of gas purification particle, preparation method includes:
Aluminum nitrate, hexamethylenetetramine are mixed under agitation with water, particulate matter therein is completely dissolved, obtains
Mixed solution.The mass content of aluminum nitrate and hexamethylenetetramine is 30% in the solution.
Then above-mentioned mixed solution is heated into 30min in 50 DEG C of tepidarium, constantly to mixed solution in heating process
It is stirred.
Complete gel state is presented in solution to be mixed, and gel is dried 12h in 120 DEG C of baking oven, obtains solid gel.
Solid gel is then calcined into 3h in 600 DEG C of Muffle furnace, obtains gas purification particle.
- the Al containing γ in the gas purification particle2O3And θ-Al2O3, the specific surface area of gas purification particle is 300-
350m2/ g is differed.
Embodiment 2
The present embodiment provides a kind of gas purification particle, preparation method includes:
Aluminum nitrate, hexamethylenetetramine are mixed under agitation with water, particulate matter therein is completely dissolved, obtains
Mixed solution.The mass content of aluminum nitrate and hexamethylenetetramine is 35% in the solution.
Then above-mentioned mixed solution is heated into 35min in 45 DEG C of tepidarium, constantly to mixed solution in heating process
It is stirred.
Complete gel state is presented in solution to be mixed, and gel is dried 12.5h in 80 DEG C of baking oven, it is solidifying to obtain solid
Glue.
Solid gel is then calcined into 3.5h in 500 DEG C of Muffle furnace, obtains gas purification particle.
- the Al containing γ in the gas purification particle2O3And θ-Al2O3, the specific surface area of gas purification particle is 300-
350m2/ g is differed.
Embodiment 3
The present embodiment provides a kind of gas purification particle, preparation method includes:
Aluminum nitrate, hexamethylenetetramine are mixed under agitation with water, particulate matter therein is completely dissolved, obtains
Mixed solution.The mass content of aluminum nitrate and hexamethylenetetramine is 40% in the solution.
Then above-mentioned mixed solution is heated into 25min in 55 DEG C of tepidarium, constantly to mixed solution in heating process
It is stirred.
Complete gel state is presented in solution to be mixed, and gel is dried 11.5h in 90 DEG C of baking oven, it is solidifying to obtain solid
Glue.
Solid gel is then calcined into 2.5h in 800 DEG C of Muffle furnace, obtains gas purification particle.
- the Al containing γ in the gas purification particle2O3And θ-Al2O3, the specific surface area of gas purification particle is 300-
350m2/ g is differed.
Test example 1
By taking the gas purification particle that embodiment 1 is prepared as an example, its treatment effect to polluted gas, measurement side are measured
Method carries out in the following manner:
Gas purification particle is filled up in small crucible, is placed in the sealing reactor of air inlet and outlet；
Sealing reactor is sealed, the CO having originally in reactor is pumped2Etc. foreign gases, then use N2Purging 3h is carried out,
Guarantee that the foreign gas in reactor completely removes；
It is passed through the sulfur dioxide (nitrogen dioxide/or mixed gas) of 50ppmv by air inlet, while adding illumination, reaction
3h；
Gas purification particle after weighing 0.01g reaction, is added 30ml deionized water, ultrasonic 2h, with the speed of 3000r/min
Degree is centrifuged, and supernatant is used to 0.45 micron of membrane filtration again, to guarantee to remove all gas purification particle powders；
Supernatant is settled to 50ml, with ion chromatography in solution nitrate anion and sulfate radical detected to assess gas
Purify the anion (SO that particle surface generates4 2-And NO3 -) quality to the changing effect of this gas purification particle.
The results are shown in Table 1 for said determination test.
1 measurement result of table
As can be seen from Table 1: gas purification particle is to NO provided by the embodiment of the present application 12、SO2And NH3All have compared with
Good absorption changing effect is conducive to remove polluted gas.
In conclusion gas purification specific grain surface provided by the present application is larger, average pore size is smaller.Preparation method letter
It is single, it is easy to operate, the stable gas purification particle of performance, and the preparation method environmental sound can be made, it is odorless, tasteless,
Secondary pollution will not be caused to air.It is used for above-mentioned gas purification particle to adsorb conversion pollutant, effectively can adsorb and urge
Change conversion NO2、SO2Or NH3Polluted gas inside purifies air.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of gas purification particle, which is characterized in that the specific surface area of the gas purification particle is 300-350m2/ g, and/
Or the average pore size of the gas purification particle is 7-7.5nm；
It include γ-Al in the gas purification particle2O3And θ-Al2O3；
Preferably, γ-Al is only contained in the gas purification particle2O3And θ-Al2O3。
2. the preparation method of gas purification particle as described in claim 1, which comprises the following steps:
By containing aluminum nitrate and solution be heated to being subsequently dried and calcining in gel；
Preferably, auxiliary agent is contained in the solution, the auxiliary agent includes hexamethylenetetramine.
3. preparation method according to claim 2, which is characterized in that the mass content of aluminum nitrate is 15- in the solution
40%.
4. preparation method according to claim 2, which is characterized in that the mass content of auxiliary agent is 15- in the solution
40%.
5. preparation method according to claim 2, which is characterized in that carry out 25- under conditions of calorifying 45-55 DEG C
35min。
6. preparation method according to claim 2, which is characterized in that drying carries out 11.5- under conditions of 80-120 DEG C
12.5h。
7. preparation method according to claim 6, which is characterized in that drying carries out 12h under conditions of 120 DEG C.
8. preparation method according to claim 2, which is characterized in that calcining carries out 2.5- under conditions of 500-800 DEG C
3.5h。
9. preparation method according to claim 8, which is characterized in that calcining carries out 3h under conditions of 600 DEG C.
10. the application of gas purification particle as described in claim 1, which is characterized in that the gas purification particle is for inhaling
Attached conversion pollutant, the pollutant include SO2、NO2And NH3At least one of polluted gas；
Preferably, after adsorbing 3h, the NO of the Surface Creation 0.1985-5.795mg of gas purification particle described in every g3 -；
Preferably, after adsorbing 3h, the SO of the Surface Creation 7.552-20.5215mg of gas purification particle described in every g4 2-。
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