CN116239372A - Preparation method of terahertz material for reducing emission of nitrogen oxides and volatile organic compounds - Google Patents
Preparation method of terahertz material for reducing emission of nitrogen oxides and volatile organic compounds Download PDFInfo
- Publication number
- CN116239372A CN116239372A CN202310276517.2A CN202310276517A CN116239372A CN 116239372 A CN116239372 A CN 116239372A CN 202310276517 A CN202310276517 A CN 202310276517A CN 116239372 A CN116239372 A CN 116239372A
- Authority
- CN
- China
- Prior art keywords
- terahertz
- nitrogen oxides
- organic compounds
- volatile organic
- mixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 239000000463 material Substances 0.000 title claims abstract description 97
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 54
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000013078 crystal Substances 0.000 claims abstract description 39
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 30
- 238000005245 sintering Methods 0.000 claims abstract description 22
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 21
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 20
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 19
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 18
- 239000011575 calcium Substances 0.000 claims abstract description 18
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000002844 melting Methods 0.000 claims abstract description 17
- 230000008018 melting Effects 0.000 claims abstract description 17
- 238000005728 strengthening Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 3
- 230000005855 radiation Effects 0.000 claims description 26
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 22
- 229910021389 graphene Inorganic materials 0.000 claims description 21
- 239000006185 dispersion Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 13
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 12
- 238000000748 compression moulding Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 8
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- BDNKZNFMNDZQMI-UHFFFAOYSA-N 1,3-diisopropylcarbodiimide Chemical compound CC(C)N=C=NC(C)C BDNKZNFMNDZQMI-UHFFFAOYSA-N 0.000 claims description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 6
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 6
- 150000007522 mineralic acids Chemical class 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 6
- 238000000034 method Methods 0.000 claims 3
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 238000006722 reduction reaction Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000110 cooling liquid Substances 0.000 description 7
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/0045—Irradiation; Radiation, e.g. with UV or IR
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3258—Tungsten oxides, tungstates, or oxide-forming salts thereof
- C04B2235/326—Tungstates, e.g. scheelite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/425—Graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/448—Sulphates or sulphites
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
- C04B2235/483—Si-containing organic compounds, e.g. silicone resins, (poly)silanes, (poly)siloxanes or (poly)silazanes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a preparation method of a terahertz material for reducing emission of nitrogen oxides and volatile organic compounds, which comprises the following steps: mixing the raw materials: uniformly mixing silicon dioxide, ferric oxide and calcium tungstate to obtain mixed raw material powder; and (3) melting and crystallizing: melting the mixed raw material powder, cooling and crystallizing, and re-crushing the mixed crystals obtained by crystallizing to obtain mixed crystal powder; and (5) press forming: adding modified graphene oxide and/or nano silicon-based oxide into the mixed crystal powder, and uniformly mixing to obtain terahertz powder; pressing and forming the terahertz powder to obtain a terahertz material block; and (3) heat treatment: placing the terahertz material block into a calciner for sintering, cooling and crushing after the sintering is finished to obtain a terahertz material; and (3) irradiation strengthening treatment: and placing the terahertz material in a terahertz irradiation line environment for irradiation strengthening treatment. When the terahertz material is used for reducing emission of nitrogen oxides and volatile organic compounds by a combustion source, the emission reduction efficiency and stability are good.
Description
Technical Field
The invention relates to the technical field of terahertz materials. In particular to a preparation method of a terahertz material for reducing emission of nitrogen oxides and volatile organic compounds.
Background
Nitrogen oxides and volatile organics are precursors to ozone and secondary PM2.5, and improvements in ambient air quality must enhance emissions control for nitrogen oxides and volatile organics. At present, the Selective Catalytic Reduction (SCR) and the selective non-catalytic reduction (SNCR) are mainly adopted in China to carry out terminal control on nitrogen oxides generated after combustion of a combustion source, but the emission of volatile organic compounds of the combustion source is hardly controlled. The tail end control mode can reduce emission of nitrogen oxides and volatile organic compounds, but increases energy consumption and ammonia escape, so that carbon emission is increased, and secondary pollution is caused by ammonia escape.
In recent exploration, materials capable of emitting terahertz spectrum show a certain promotion effect on emission reduction of nitrogen oxides and volatile organic compounds of combustion sources. For example, patent CN111875819a prepares a terahertz master batch for reducing emission and saving oil of a gasoline vehicle, which can emit terahertz waves to activate oil fuel, air, cooling liquid and the like, reduce HC of the vehicle by 90% on average, NOx by 70% on average, save fuel by 10% on average, improve power by 8% and reduce carbon deposition, prolong service life of a three-way catalyst, and reduce contribution of tail gas to PM2.5 by 90%.
However, the inventor of the application repeatedly tests the terahertz material applied to other mobile source fuels such as diesel vehicles and the like, and finds that the efficiency of promoting the emission reduction of nitrogen oxides and volatile organic compounds is unstable, and in some tests, more harmful substances are discharged from tail gas, so that the harmful substances have great deviation. Therefore, it is necessary to design a preparation method of the terahertz material capable of reducing the emission of the nitrogen oxides and the volatile organic compounds of the combustion source, and the prepared terahertz material has relatively stable emission promotion and reduction effects of the nitrogen oxides and the volatile organic compounds of the combustion source.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a preparation method of the terahertz material capable of reducing emission of nitrogen oxides and volatile organic compounds of a combustion source, so as to solve the problem that the emission reduction efficiency and stability of the existing terahertz material are poor when the existing terahertz material is used for reducing the emission of the nitrogen oxides and the volatile organic compounds of the combustion source.
In order to solve the technical problems, the invention provides the following technical scheme:
the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds comprises the following steps:
step (1), mixing the raw materials: uniformly mixing silicon dioxide, ferric oxide and calcium tungstate to obtain mixed raw material powder;
step (2), melting and crystallizing: melting the mixed raw material powder, cooling and crystallizing, and re-crushing the mixed crystals obtained by crystallizing to obtain mixed crystal powder;
step (3), compression molding: adding modified graphene oxide and/or nano silicon-based oxide into the mixed crystal powder, and uniformly mixing to obtain terahertz powder; pressing and forming the terahertz powder to obtain a terahertz material block;
step (4), heat treatment: placing the terahertz material block into a calciner for sintering, cooling and crushing after the sintering is finished to obtain a terahertz material;
step (5), irradiation strengthening treatment: and placing the terahertz material in a terahertz irradiation line environment for irradiation strengthening treatment.
In the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds, in the step (1), the mass ratio of silicon dioxide, ferric oxide and calcium tungstate is as follows: (3-5) (1-3) (1-2); the silicon dioxide, ferric oxide and calcium tungstate are all sieved by a 200-mesh sieve.
In the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds, in the step (2), the melting temperature is 1600-1800 ℃ and the melting time is 1-1.5 h; and (3) crushing the mixed crystals, and sieving the crushed mixed crystals with a 300-mesh sieve to obtain mixed crystal powder.
In the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds, in the step (3), the pressure of compression molding is 3-5 MPa, and the pressure maintaining time is 10-20 min; the press forming temperature is room temperature;
when the modified graphene oxide is added into the mixed crystal powder, the mass ratio of the mixed crystal powder to the modified graphene oxide is 5-8:1;
when the nano silicon-based oxide is added into the mixed crystal powder, the mass ratio of the mixed crystal powder to the nano silicon-based oxide is 3-5:1;
when the modified graphene oxide and the nano silicon-based oxide are added into the mixed crystal powder, the ratio of the mass of the mixed crystal powder to the sum of the mass of the modified graphene oxide and the mass of the nano silicon-based oxide is as follows: 2-5:1, and the mass ratio of the modified graphene oxide to the nano silicon-based oxide is 1:2-3.
The preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds comprises the following steps of:
step (A-1), ultrasonically dispersing graphene oxide in dimethyl sulfoxide to obtain graphene oxide dispersion liquid;
step (A-2), adding silica gel and N, N' -diisopropylcarbodiimide into graphene oxide dispersion liquid, and placing in a water bath for heating reaction;
and (A-3) cleaning a product obtained by the reaction with water and methanol in sequence, and drying to obtain the modified graphene oxide.
In the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds, in the step (A-1), the mass fraction of graphene oxide in the graphene oxide dispersion liquid is 15-20wt%;
in the step (A-2), the mass ratio of graphene oxide, silica gel and N, N' -diisopropylcarbodiimide is as follows: 1: (15-20): (2-4); the temperature of the heating reaction is 30-40 ℃, and the time of the heating reaction is 30-60 min.
The preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds comprises the following steps of:
step (B-1), placing magnesium sulfate and tetraethoxysilane into water to be uniformly dispersed to obtain mixed dispersion liquid; adding inorganic acid into the mixed dispersion liquid for reaction, adjusting the pH value to be neutral after the reaction is completed, and standing to obtain a mixed system A;
adding acetone into the mixed system A for stirring, then adding vinyl triethoxysilane, continuing stirring, and obtaining a mixed system B after stirring is finished;
and (B-3) drying the mixed system B to obtain the nano silicon-based oxide.
In the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds, in the step (B-1), the mass ratio of magnesium sulfate to tetraethyl orthosilicate to water is 1: (1-1.5): (2-3); the addition amount of the inorganic acid is such that the pH of the mixed dispersion is from 4 to 5; the reaction time is 4-6 h, and the standing time is 16-24 h;
the ratio of the volume of acetone in step (B-2) to the volume of water in step (B-1) was 1: 8-10, wherein the volume ratio of the vinyl triethoxysilane to the acetone is 1.5-2:1; the stirring time after adding acetone is 1 to 1.5 hours, and the stirring time after adding vinyl triethoxysilane is 2 to 3 hours;
in the step (B-3), the drying temperature is 60-70 ℃ and the drying time is 12-24 h.
In the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds, in the step (4), the sintering temperature is 1100-1300 ℃ and the sintering time is 1-2 h; the grain diameter of the terahertz material is 10-50 mu m.
In the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds, in the step (5), the irradiation strengthening treatment conditions are as follows: first at 2.3X10 11 Radiation treatment for 1-3 h under frequency band, then at 5.5X10 11 The radiation treatment is carried out for 1 to 3 hours under the frequency band, and then the radiation treatment is carried out at 2.3X10 12 Radiation treatment for 1-3 h under frequency band, and finally at 5.5X10 12 And carrying out radiation treatment for 1-3 h under the frequency band.
The technical scheme of the invention has the following beneficial technical effects:
1. according to the invention, three terahertz materials with relatively similar melting points are firstly melted and mixed, and then modified graphene oxide and/or nano silicon-based oxide are added, so that the terahertz material with high emissivity can be prepared, and the terahertz material has good emission reduction efficiency and stability when being used for reducing emission of nitrogen oxides and volatile organic compounds by a combustion source.
2. According to the preparation method, graphene oxide is used after being modified, so that the emissivity of the prepared terahertz material and the stability of emission reduction energy efficiency of the terahertz material can be effectively improved, and the preparation method is probably because: the graphene oxide bonded by the silica gel can better cooperate with terahertz materials such as silicon dioxide, ferric oxide, calcium tungstate and the like to mutually excite the radiation performance of the terahertz materials, and finally the terahertz materials with high emissivity are obtained.
3. Compared with common silicon dioxide, the nano silicon-based oxide has a special lattice structure, so that the terahertz material has higher emissivity; in addition, the nano silicon-based oxide prepared by the preparation method can keep higher emissivity of the terahertz material under different use conditions in the presence of the calcium tungstate, and the synergistic effect of the nano silicon-based oxide and the modified graphite oxide is more obvious when the modified graphite oxide is added into the terahertz material.
Detailed Description
Example 1
In this embodiment, the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds includes the following steps:
step (1), mixing the raw materials: uniformly mixing silicon dioxide, ferric oxide and calcium tungstate to obtain mixed raw material powder; the mass ratio of the silicon dioxide, the ferric oxide and the calcium tungstate is 3:2:1; the silicon dioxide, ferric oxide and calcium tungstate are all sieved by a 200-mesh sieve.
Step (2), melting and crystallizing: melting the mixed raw material powder at 1750 ℃ for 1h, cooling for crystallization, re-crushing the mixed crystals obtained by crystallization, and sieving with a 300-mesh sieve to obtain mixed crystal powder;
step (3), compression molding: adding modified graphene oxide into the mixed crystal powder, wherein the mass ratio of the mixed crystal powder to the modified graphene oxide is 5:1, and uniformly mixing to obtain terahertz powder; maintaining the pressure of the terahertz powder for 10 min at room temperature and 5MPa, and performing compression molding to obtain a terahertz material block;
step (4), heat treatment: placing the terahertz material block into a calciner for sintering, wherein the sintering temperature is 1200 ℃, and the sintering time is 2 hours; cooling and crushing after sintering to obtain a terahertz material, wherein the particle size of the terahertz material is 10-50 mu m;
step (5), irradiation strengthening treatment: placing the terahertz material in a terahertz irradiation line environment for irradiation strengthening treatment; the irradiation strengthening treatment conditions are as follows: first at 2.3X10 11 Radiation treatment for 1-3 h under frequency band, then at 5.5X10 11 The radiation treatment is carried out for 1 to 3 hours under the frequency band, and then the radiation treatment is carried out at 2.3X10 12 Radiation treatment for 1-3 h under frequency band, and finally at 5.5X10 12 And carrying out radiation treatment for 1-3 h under the frequency band.
The preparation method of the modified graphene oxide added in the step (3) of the embodiment comprises the following steps:
step (A-1), ultrasonically dispersing graphene oxide in dimethyl sulfoxide to obtain graphene oxide dispersion liquid; the mass fraction of graphene oxide in the graphene oxide dispersion liquid is 20wt%;
step (A-2), adding silica gel and N, N' -diisopropylcarbodiimide into graphene oxide dispersion liquid, and placing in a water bath for heating reaction; the mass ratio of graphene oxide, silica gel and N, N' -diisopropylcarbodiimide is as follows: 1:15:2, heating reaction temperature is 38 ℃, and heating reaction time is 50 min;
and (A-3) cleaning a product obtained by the reaction with water and methanol in sequence, and drying to obtain the modified graphene oxide.
The infrared emissivity of the terahertz material prepared in the embodiment reaches 91.3%, and the terahertz material prepared in the embodiment is added into cooling liquid of a gasoline vehicle and a diesel vehicle for repeated tests respectively, so that the results show that the amounts of nitrogen oxides and volatile organic compounds discharged by combustion of the gasoline vehicle and the diesel vehicle after the terahertz material is added are obviously reduced; the terahertz material promotes the stable emission reduction efficiency of nitrogen oxides and volatile organic compounds.
Example 2
In this embodiment, the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds includes the following steps:
step (1), mixing the raw materials: uniformly mixing silicon dioxide, ferric oxide and calcium tungstate to obtain mixed raw material powder; the mass ratio of the silicon dioxide, the ferric oxide and the calcium tungstate is 5:3:2; the silicon dioxide, ferric oxide and calcium tungstate are all sieved by a 200-mesh sieve.
Step (2), melting and crystallizing: melting the mixed raw material powder at 1600 ℃ for 1.5 hours, cooling and crystallizing, re-crushing the mixed crystals obtained by crystallization, and sieving with a 300-mesh sieve to obtain mixed crystal powder;
step (3), compression molding: adding nano silicon-based oxide into the mixed crystal powder, wherein the mass ratio of the mixed crystal powder to the nano silicon-based oxide is 5:1, and uniformly mixing to obtain terahertz powder; maintaining the pressure of the terahertz powder at room temperature and 3MPa for 20min, and performing compression molding to obtain a terahertz material block;
step (4), heat treatment: placing the terahertz material block into a calciner for sintering, wherein the sintering temperature is 1300 ℃, and the sintering time is 1h; cooling and crushing after sintering to obtain a terahertz material, wherein the particle size of the terahertz material is 10-50 mu m;
step (5), irradiation strengthening treatment: placing the terahertz material in a terahertz irradiation line environment for irradiation strengthening treatment; the irradiation strengthening treatment conditions are as follows: first at 2.3X10 11 Radiation treatment for 1-3 h under frequency band, then at 5.5X10 11 The radiation treatment is carried out for 1 to 3 hours under the frequency band, and then the radiation treatment is carried out at 2.3X10 12 Radiation treatment for 1-3 h under frequency band, and finally at 5.5X10 12 And carrying out radiation treatment for 1-3 h under the frequency band.
The preparation method of the nano silicon-based oxide added in the step (3) of the embodiment comprises the following steps:
step (B-1), placing magnesium sulfate and tetraethoxysilane into water to be uniformly dispersed to obtain mixed dispersion liquid; adding inorganic acid into the mixed dispersion liquid for reaction, adjusting the pH value to be neutral after the reaction is completed, and standing to obtain a mixed system A; the mass ratio of magnesium sulfate, ethyl orthosilicate and water is 1:1.5:3, a step of; the amount of the inorganic acid added is such that the pH of the mixed dispersion is 4; the reaction time is 5 hours, and the standing time is 20 hours;
step (B-2), adding acetone into the mixed system A, stirring for 1.5 hours, then adding vinyl triethoxysilane, continuously stirring for 3 hours, and obtaining a mixed system B after stirring is finished; the ratio of the volume of acetone to the volume of water in step (B-1) is 1:10, the volume ratio of vinyltriethoxysilane to acetone is 1.5:1;
and (B-3) drying the mixed system B at 70 ℃ for 24 hours to obtain the nano silicon-based oxide.
The infrared emissivity of the terahertz material prepared in the embodiment reaches 92.5%, and repeated tests are carried out by adding the terahertz material prepared in the embodiment into cooling liquid of a gasoline vehicle and a diesel vehicle respectively, so that the amounts of nitrogen oxides and volatile organic compounds discharged by combustion of the gasoline vehicle and the diesel vehicle after the terahertz material is added are obviously reduced; terahertz materials promote stable emission reduction of nitrogen oxides and volatile organic compounds, but the stability of the performance is slightly better than that of example 1.
Example 3
In this embodiment, the preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds includes the following steps:
step (1), mixing the raw materials: uniformly mixing silicon dioxide, ferric oxide and calcium tungstate to obtain mixed raw material powder; the mass ratio of the silicon dioxide, the ferric oxide and the calcium tungstate is 4:1:1; the silicon dioxide, ferric oxide and calcium tungstate are all sieved by a 200-mesh sieve.
Step (2), melting and crystallizing: melting the mixed raw material powder at 1800 ℃ for 1h, cooling for crystallization, re-crushing the mixed crystals obtained by crystallization, and sieving with a 300-mesh sieve to obtain mixed crystal powder;
step (3), compression molding: adding modified graphene oxide and nano silicon-based oxide into the mixed crystal powder, wherein the mass ratio of the mixed crystal powder to the modified graphene oxide to the nano silicon-based oxide is 5:1, and the mass ratio of the modified graphene oxide to the nano silicon-based oxide is 1:2; uniformly mixing to obtain terahertz powder; maintaining the pressure of the terahertz powder at room temperature and 4MPa for 15 min, and performing compression molding to obtain a terahertz material block;
step (4), heat treatment: placing the terahertz material block into a calciner for sintering, wherein the sintering temperature is 1100 ℃, and the sintering time is 2 hours; cooling and crushing after sintering to obtain a terahertz material, wherein the particle size of the terahertz material is 10-50 mu m;
step (5), irradiation strengthening treatment: placing the terahertz material in a terahertz irradiation line environment for irradiation strengthening treatment; the irradiation strengthening treatment conditions are as follows: first at 2.3X10 11 Radiation treatment for 1-3 h under frequency band, then at 5.5X10 11 The radiation treatment is carried out for 1 to 3 hours under the frequency band, and then the radiation treatment is carried out at 2.3X10 12 Radiation treatment for 1-3 h under frequency band, and finally at 5.5X10 12 And carrying out radiation treatment for 1-3 h under the frequency band.
The preparation method of the modified graphene oxide added in the step (3) of this embodiment is the same as that of embodiment 1, and the preparation method of the added nano silicon-based oxide is the same as that of embodiment 2.
The infrared emissivity of the terahertz material prepared in the embodiment reaches 95.8%, and repeated tests are carried out by adding the terahertz material prepared in the embodiment into cooling liquid of a gasoline vehicle and a diesel vehicle respectively, so that the amounts of nitrogen oxides and volatile organic compounds discharged by combustion of the gasoline vehicle and the diesel vehicle after the terahertz material is added are obviously reduced; terahertz materials promote stable emission reduction of nitrogen oxides and volatile organic compounds, but the stability of the performance is better than that of example 2.
Comparative example 1
This comparative example differs from example 1 only in that: in step (3), the modified graphene oxide in example 1 was replaced with commercially available graphene oxide.
The infrared emissivity of the terahertz material prepared in the comparative example reaches 85.6%, the terahertz material prepared in the comparative example is added into cooling liquid of a gasoline vehicle and a diesel vehicle to be subjected to repeated tests respectively, and the results show that the amounts of nitrogen oxides and volatile organic compounds discharged by combustion of the gasoline vehicle and the diesel vehicle after the terahertz material is added are reduced, but the reduction amplitude deviation is larger in different tests; the stability of the emission reduction performance was significantly poorer than that of example 1.
Comparative example 2
This comparative example differs from example 2 only in that: in step (3), commercially available nanosilicon dioxide was added in place of the nanosilicon-based oxide in example 2.
The infrared emissivity of the terahertz material prepared in the comparative example reaches 81.9%, the terahertz material prepared in the comparative example is added into cooling liquid of a gasoline vehicle and a diesel vehicle to be subjected to repeated tests respectively, and the results show that the amounts of nitrogen oxides and volatile organic compounds discharged by combustion of the gasoline vehicle and the diesel vehicle after the terahertz material is added are reduced, but the reduction amplitude deviation is larger in different tests; the stability of the emission reduction performance was significantly poorer than that of example 2.
Comparative example 3
This comparative example differs from example 3 only in that: mixing raw materials in the step (1): uniformly mixing silicon dioxide and ferric oxide to obtain mixed raw material powder; the mass ratio of the silicon dioxide to the ferric oxide is 4:2; both silica and ferric oxide were sieved through a 200 mesh screen.
The infrared emissivity of the terahertz material prepared in the comparative example reaches 89.7%, the terahertz material prepared in the comparative example is added into cooling liquid of a gasoline vehicle and a diesel vehicle to carry out repeated tests respectively, and the results show that the amounts of nitrogen oxides and volatile organic compounds discharged by combustion of the gasoline vehicle and the diesel vehicle after the terahertz material is added are reduced, but the reduction amplitude deviation is larger in different tests; the stability of the emission reduction performance was significantly poorer than that of example 1.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While the obvious variations or modifications which are extended therefrom remain within the scope of the claims of this patent application.
Claims (10)
1. The preparation method of the terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds is characterized by comprising the following steps of:
step (1), mixing the raw materials: uniformly mixing silicon dioxide, ferric oxide and calcium tungstate to obtain mixed raw material powder;
step (2), melting and crystallizing: melting the mixed raw material powder, cooling and crystallizing, and re-crushing the mixed crystals obtained by crystallizing to obtain mixed crystal powder;
step (3), compression molding: adding modified graphene oxide and/or nano silicon-based oxide into the mixed crystal powder, and uniformly mixing to obtain terahertz powder; pressing and forming the terahertz powder to obtain a terahertz material block;
step (4), heat treatment: placing the terahertz material block into a calciner for sintering, cooling and crushing after the sintering is finished to obtain a terahertz material;
step (5), irradiation strengthening treatment: and placing the terahertz material in a terahertz irradiation line environment for irradiation strengthening treatment.
2. The method for producing a terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds according to claim 1, wherein in step (1), the mass ratio of silica, ferric oxide, and calcium tungstate is: (3-5) (1-3) (1-2); the silicon dioxide, ferric oxide and calcium tungstate are all sieved by a 200-mesh sieve.
3. The method for producing terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds according to claim 1, characterized in that in step (2), the melting temperature is 1600 to 1800 ℃ and the melting time is 1 to 1.5h; and (3) crushing the mixed crystals, and sieving the crushed mixed crystals with a 300-mesh sieve to obtain mixed crystal powder.
4. The method for producing a terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds according to claim 1, wherein in step (3), the pressure of compression molding is 3 to 5MPa, and the dwell time is 10 to 20min; the press forming temperature is room temperature;
when the modified graphene oxide is added into the mixed crystal powder, the mass ratio of the mixed crystal powder to the modified graphene oxide is 5-8:1;
when the nano silicon-based oxide is added into the mixed crystal powder, the mass ratio of the mixed crystal powder to the nano silicon-based oxide is 3-5:1;
when the modified graphene oxide and the nano silicon-based oxide are added into the mixed crystal powder, the ratio of the mass of the mixed crystal powder to the sum of the mass of the modified graphene oxide and the mass of the nano silicon-based oxide is as follows: 2-5:1, and the mass ratio of the modified graphene oxide to the nano silicon-based oxide is 1:2-3.
5. The method for preparing a terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds according to claim 1, wherein the preparation method of the modified graphene oxide in step (3) is as follows:
step (A-1), ultrasonically dispersing graphene oxide in dimethyl sulfoxide to obtain graphene oxide dispersion liquid;
step (A-2), adding silica gel and N, N' -diisopropylcarbodiimide into graphene oxide dispersion liquid, and placing in a water bath for heating reaction;
and (A-3) cleaning a product obtained by the reaction with water and methanol in sequence, and drying to obtain the modified graphene oxide.
6. The method for producing a terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds according to claim 5, characterized in that in step (a-1), the mass fraction of graphene oxide in the graphene oxide dispersion is 15 to 20wt%;
in the step (A-2), the mass ratio of graphene oxide, silica gel and N, N' -diisopropylcarbodiimide is as follows: 1: (15-20): (2-4); the temperature of the heating reaction is 30-40 ℃, and the time of the heating reaction is 30-60 min.
7. The method for preparing terahertz material for reducing emissions of nitrogen oxides and volatile organic compounds according to claim 1, wherein the preparation method of nano silicon-based oxide in step (3) is as follows:
step (B-1), placing magnesium sulfate and tetraethoxysilane into water to be uniformly dispersed to obtain mixed dispersion liquid; adding inorganic acid into the mixed dispersion liquid for reaction, adjusting the pH value to be neutral after the reaction is completed, and standing to obtain a mixed system A;
adding acetone into the mixed system A for stirring, then adding vinyl triethoxysilane, continuing stirring, and obtaining a mixed system B after stirring is finished;
and (B-3) drying the mixed system B to obtain the nano silicon-based oxide.
8. The method for producing a terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds as claimed in claim 7, wherein in step (B-1), the mass ratio of magnesium sulfate, tetraethyl orthosilicate and water is 1: (1-1.5): (2-3); the addition amount of the inorganic acid is such that the pH of the mixed dispersion is from 4 to 5; the reaction time is 4-6 h, and the standing time is 16-24 h;
the ratio of the volume of acetone in step (B-2) to the volume of water in step (B-1) was 1: 8-10, wherein the volume ratio of the vinyl triethoxysilane to the acetone is 1.5-2:1; the stirring time after adding acetone is 1 to 1.5 hours, and the stirring time after adding vinyl triethoxysilane is 2 to 3 hours;
in the step (B-3), the drying temperature is 60-70 ℃ and the drying time is 12-24 h.
9. The method for preparing a terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds according to claim 1, wherein in step (4), the sintering temperature is 1100-1300 ℃ and the sintering time is 1-2 h; the grain diameter of the terahertz material is 10-50 mu m.
10. The method for producing a terahertz material for reducing the emission of nitrogen oxides and volatile organic compounds according to claim 1, wherein in step (5), the irradiation strengthening treatment conditions are: first at 2.3X10 11 Radiation treatment for 1-3 h under frequency band, then at 5.5X10 11 The radiation treatment is carried out for 1 to 3 hours under the frequency band, and then the radiation treatment is carried out at 2.3X10 12 Radiation position under frequency bandThe treatment is carried out for 1 to 3 hours, and finally, the treatment is carried out at 5.5X10 12 And carrying out radiation treatment for 1-3 h under the frequency band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310276517.2A CN116239372B (en) | 2023-03-21 | 2023-03-21 | Preparation method of terahertz material for reducing emission of nitrogen oxides and volatile organic compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310276517.2A CN116239372B (en) | 2023-03-21 | 2023-03-21 | Preparation method of terahertz material for reducing emission of nitrogen oxides and volatile organic compounds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116239372A true CN116239372A (en) | 2023-06-09 |
| CN116239372B CN116239372B (en) | 2024-01-26 |
Family
ID=86624188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310276517.2A Active CN116239372B (en) | 2023-03-21 | 2023-03-21 | Preparation method of terahertz material for reducing emission of nitrogen oxides and volatile organic compounds |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116239372B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104489922A (en) * | 2014-12-11 | 2015-04-08 | 上海烟草集团有限责任公司 | Preparation and application of graphene oxide-bonded silica gel composite |
| KR101727291B1 (en) * | 2016-01-14 | 2017-04-14 | 연세대학교 산학협력단 | Method for generating a ultra terahertz using graphene metamaterial |
| CN107759221A (en) * | 2016-08-18 | 2018-03-06 | 叶耀南 | Terahertz（Tera Hertz、THz）Composite and preparation method thereof |
| CN110003660A (en) * | 2019-04-28 | 2019-07-12 | 张慧 | A kind of Terahertz material silica gel composite and preparation method thereof |
| CN110242447A (en) * | 2019-06-18 | 2019-09-17 | 佟延 | A kind of Terahertz material and its preparation method and application for gasoline vehicle emission reduction fuel-economizing |
| CN111499360A (en) * | 2020-05-18 | 2020-08-07 | 沪本新材料科技（上海）有限公司 | Terahertz material |
| CN113413871A (en) * | 2021-06-28 | 2021-09-21 | 河南晶品新材料科技有限公司 | Terahertz automatic regeneration activated carbon and preparation method and application thereof |
-
2023
- 2023-03-21 CN CN202310276517.2A patent/CN116239372B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104489922A (en) * | 2014-12-11 | 2015-04-08 | 上海烟草集团有限责任公司 | Preparation and application of graphene oxide-bonded silica gel composite |
| KR101727291B1 (en) * | 2016-01-14 | 2017-04-14 | 연세대학교 산학협력단 | Method for generating a ultra terahertz using graphene metamaterial |
| CN107759221A (en) * | 2016-08-18 | 2018-03-06 | 叶耀南 | Terahertz（Tera Hertz、THz）Composite and preparation method thereof |
| CN110003660A (en) * | 2019-04-28 | 2019-07-12 | 张慧 | A kind of Terahertz material silica gel composite and preparation method thereof |
| CN110242447A (en) * | 2019-06-18 | 2019-09-17 | 佟延 | A kind of Terahertz material and its preparation method and application for gasoline vehicle emission reduction fuel-economizing |
| CN111499360A (en) * | 2020-05-18 | 2020-08-07 | 沪本新材料科技（上海）有限公司 | Terahertz material |
| CN113413871A (en) * | 2021-06-28 | 2021-09-21 | 河南晶品新材料科技有限公司 | Terahertz automatic regeneration activated carbon and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王红等: "基于氧化钒与石墨烯复合结构的宽带大深度太赫兹调制器", 《桂林电子科技大学学报》, vol. 39, no. 5, pages 410 - 415 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116239372B (en) | 2024-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108543544B (en) | Honeycomb homoheterojunction carbon nitride composite material, preparation method thereof and application thereof in catalytic treatment of waste gas | |
| CN111167492B (en) | Copper-modified carbon nitride, preparation method thereof and application of copper-modified carbon nitride in photocatalytic methane conversion | |
| CN110665488B (en) | Acid-base double-nature solid catalyst, preparation and application thereof in producing biodiesel | |
| CN110227532B (en) | Preparation method of lead cesium bromide quantum dot/carbon nitride nanosheet photocatalyst | |
| WO2023273670A1 (en) | Carbon-based methanol hydrogen-production catalyst, preparation method therefor, and application thereof | |
| CN110227560B (en) | Preparation method of honeycomb-shaped copper chloride/SCR (Selective catalytic reduction) demercuration catalyst | |
| CN113813955B (en) | Method for preparing denitration catalyst coating slurry by using municipal sludge | |
| KR101828965B1 (en) | Catalyst suitable for production of aviation kerosene from biomass fischer-tropsch synthesis oil and preparation method therefor | |
| CN101791549A (en) | Method for preparing formed selective catalytic reduction denitration catalyst by using ultrasonic mixing sedimentation method | |
| CN103623832B (en) | Preparation method of rare-earth oxide material containing tourmaline | |
| CN116239372B (en) | Preparation method of terahertz material for reducing emission of nitrogen oxides and volatile organic compounds | |
| CN110882691B (en) | Cordierite supported medium-temperature denitration catalyst and preparation method thereof | |
| CN109158114B (en) | Method for preparing CdS @ C composite photocatalyst by one-step method | |
| CN111760564A (en) | Catalyst for urea hydrolysis and preparation method and application thereof | |
| CN102069017A (en) | Method for preparing molecular sieve catalyst composite carriers | |
| CN110951107A (en) | Controllable preparation of PI aerogel material and photocatalytic reduction of CO2In (1) | |
| CN110813367A (en) | Phosphorus and rare earth synergistically modified ZSM-5 and method for increasing propylene yield through catalytic cracking of ZSM-5 | |
| CN111548186A (en) | Porous silicon carbide ceramic and low-temperature preparation method | |
| CN110252375A (en) | A kind of iron, nitrogen, the Titanium dioxide/active carbon compound of cobalt codope, preparation method and as photocatalyst applications | |
| CN111362267B (en) | Method for preparing nitrogen-doped carbon and nitrogen-containing heterocycle by using plasma | |
| CN113667508A (en) | Method for preparing monocyclic aromatic hydrocarbon-rich bio-oil by catalytic thermal cracking of poplar | |
| CN109999857B (en) | Near-infrared response hollow cerium fluoride up-conversion photocatalytic material and preparation method and application thereof | |
| CN111849527A (en) | Liquid fuel based on biomass and production process thereof | |
| CN108913272A (en) | A kind of preparation method for the additive enhancing biological particles combustion efficiency | |
| CN104014376A (en) | Preparation method for honeycomb-shaped low-temperature denitration catalytic material taking TiO2-Mg2Al4SiO18 as carrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |