CN114950339A - Adsorbent for fluorine-containing gas and preparation method thereof - Google Patents
Adsorbent for fluorine-containing gas and preparation method thereof Download PDFInfo
- Publication number
- CN114950339A CN114950339A CN202210590833.2A CN202210590833A CN114950339A CN 114950339 A CN114950339 A CN 114950339A CN 202210590833 A CN202210590833 A CN 202210590833A CN 114950339 A CN114950339 A CN 114950339A
- Authority
- CN
- China
- Prior art keywords
- adsorbent
- containing compound
- fluorine
- containing gas
- zinc
- 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.)
- Pending
Links
- 239000003463 adsorbent Substances 0.000 title claims abstract description 170
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 65
- 239000011737 fluorine Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003381 stabilizer Substances 0.000 claims abstract description 25
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 12
- 238000007580 dry-mixing Methods 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 54
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 20
- 229910052725 zinc Inorganic materials 0.000 claims description 20
- 239000011701 zinc Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 239000000395 magnesium oxide Substances 0.000 claims description 17
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 17
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 17
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 12
- 239000011575 calcium Substances 0.000 claims description 12
- 239000002210 silicon-based material Substances 0.000 claims description 12
- 239000010936 titanium Substances 0.000 claims description 12
- 229910052719 titanium Inorganic materials 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 11
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 8
- 239000011777 magnesium Substances 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 239000011667 zinc carbonate Substances 0.000 claims description 3
- 229910000010 zinc carbonate Inorganic materials 0.000 claims description 3
- 235000004416 zinc carbonate Nutrition 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims 1
- 239000000920 calcium hydroxide Substances 0.000 claims 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 20
- 230000003197 catalytic effect Effects 0.000 abstract description 17
- 230000000694 effects Effects 0.000 description 44
- 239000002912 waste gas Substances 0.000 description 40
- 238000001179 sorption measurement Methods 0.000 description 22
- 239000011148 porous material Substances 0.000 description 20
- 239000013078 crystal Substances 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000001354 calcination Methods 0.000 description 10
- 238000003421 catalytic decomposition reaction Methods 0.000 description 10
- 238000000354 decomposition reaction Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000002841 Lewis acid Substances 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 150000007517 lewis acids Chemical class 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 238000010669 acid-base reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 description 1
- 235000019402 calcium peroxide Nutrition 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000000724 energy-dispersive X-ray spectrum Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000005436 troposphere Substances 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- 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
- B01D53/8659—Removing halogens or halogen compounds
-
- 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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Abstract
The application relates to the field of adsorbents, and particularly discloses an adsorbent for fluorine-containing gas and a preparation method of the adsorbent. An adsorbent for fluorine-containing gas comprises the following substances in parts by weight: 40-90 parts of active component, 10-60 parts of stabilizer, 0-0.3 part of catalyst and 0-0.4 part of regulator, wherein the active component comprises alumina powder and pseudo-boehmite, and the pseudo-boehmite is subjected to water doping treatment; the preparation method comprises the following steps: s1, water doping treatment; s2, dry mixing; s3, wet mixing; s4, preparing an adsorbent. The adsorbent can be used for adsorbing fluorine-containing gases such as CF4, SF6 and C4F6, and has the advantages of high-efficiency catalytic activity and proper catalytic temperature.
Description
Technical Field
The application relates to the field of adsorbents, in particular to an adsorbent for fluorine-containing gas and a preparation method thereof.
Background
In industrial production, waste gas is easily generated, the waste gas is discharged to the environment to influence the environment, in order to reduce the pollution of the waste gas to the environment, a factory needs to treat the waste gas, and the waste gas containing fluorine is one of the waste gases which are easily generated in industrial production.
After the fluorine-containing waste gas is released into the environment, the fluorine-containing waste gas can strongly absorb infrared radiation, so that the environment temperature is increased. And the fluorine-containing gas has higher stability and is not easy to be damaged by photochemical effect in the troposphere, so the fluorine-containing gas can be continuously accumulated in the atmosphere, the greenhouse effect index is gradually improved, and the fluorine-containing gas is a main greenhouse gas except carbon dioxide.
The method for treating fluorine-containing gas can be divided into combustion method, adsorption method, catalytic decomposition method, electric washing method and plasma decomposition method, wherein the catalytic decomposition method is widely applied to waste gas treatment, and the catalytic decomposition method is also called as catalytic combustion method, and the fluorine-containing gas is catalyzed by an adsorbent to generate chemical change under high-temperature environment, so that the fluorine-containing gas is converted into CO 2 COF, etc.
In view of the above-mentioned related art, the inventors considered that when the fluorine-containing exhaust gas is treated by the catalytic decomposition method, a high catalytic temperature is required, and the adsorption catalyst is decomposed to some extent even at a high temperature, thereby causing a defect that the catalytic effect of the adsorbent is not good.
Disclosure of Invention
In order to overcome the defect that the adsorption catalysis effect of the adsorbent is poor, the application provides the adsorbent for the fluorine-containing gas and the preparation method thereof.
In a first aspect, the present application provides an adsorbent for fluorine-containing gas, which adopts the following technical scheme:
an adsorbent for fluorine-containing gas comprises the following substances in parts by weight: 40-90 parts of active component, 10-60 parts of stabilizer, 0-0.3 part of catalyst and 0-0.4 part of regulator, wherein the active component comprises alumina powder and pseudo-boehmite, and the pseudo-boehmite is subjected to water mixing treatment to obtain alumina sol.
By adopting the technical scheme, firstly, because the alumina has porosity, the rest components in the adsorbent can be effectively loaded, the adsorbent can obtain more appropriate porosity and specific surface area, the contact area between the adsorbent and the fluorine-containing waste gas is increased, and the deep reaction effect between the adsorbent and the fluorine-containing waste gas is improved.
Meanwhile, the alumina has better air permeability and formability, and when the adsorbent is prepared by sintering, heat can be uniformly dispersed along a porous structure, so that adsorbent particles with uniform structure density are obtained; and when the adsorbent adsorbs the fluorine-containing waste gas later, the contact area between the fluorine-containing waste gas and the adsorbent can be further increased.
Secondly, the pseudo-boehmite and the alumina powder are adopted to be matched, so that the catalytic activity of the active component can be further improved, namely the gamma-Al in the adsorbent is increased 2 O 3 The number of crystal forms improves the catalytic decomposition effect of the adsorbent.
In addition, the pseudo-boehmite is subjected to water doping treatment, so that the problem that the pseudo-boehmite can be dispersed in water to form alumina sol can be effectively improved, and the components in the adsorbent are bonded through the alumina sol to promote the forming effect of the adsorbent; and the aluminum sol can form a cross-linked network structure in the adsorbent, so that the bonding strength among all components in the adsorbent is effectively enhanced. After sintering treatment, water in the alumina sol is evaporated to form a dry cross-linked network structure, so that the components in the adsorbent are continuously connected to form and support a pore structure of the adsorbent, and the influence of a viscous substance on deep reaction of fluorine-containing waste gas and active components can be reduced. Therefore, the adsorbent obtains better catalytic activity and catalytic decomposition effect on the fluorine-containing waste gas.
Finally, because the alumina powder has a better heat storage effect, the adsorbent can effectively absorb and store heat when decomposing fluorine-containing waste gas, so that the adsorbent can decompose the fluorine-containing waste gas at the temperature of 500-750 ℃, the decomposition temperature of the fluorine-containing waste gas is reduced, the crystal transformation in the alumina is inhibited, and the catalytic activity and the use safety of the adsorbent are improved.
Preferably, the active component also comprises aluminum phosphate, and the mass ratio of the aluminum oxide powder to the pseudo-boehmite to the aluminum phosphate is 40:1-3: 2-4.
By adopting the technical scheme, the composition and the proportion of the active components are optimized, the aluminum phosphate is added into the active components, the aluminum phosphate can be converted into the alumina after the aluminum phosphate is calcined in the preparation process of the adsorbent, the obtained alumina has larger specific surface area and better activity, the contact area between the adsorbent and the fluorine-containing waste gas is increased, and the activity is increasedgamma-Al of the composition 2 O 3 The quantity of the crystal forms can also improve the oxidation effect of the active component and further improve the catalytic decomposition effect of the adsorbent on the fluorine-containing waste gas.
Preferably, the active component further comprises a magnesium-containing compound, and the magnesium-containing compound comprises any one of magnesium oxide and magnesium carbonate.
Through adopting above-mentioned technical scheme, this application technical scheme chooses to add magnesium-containing compound in the active ingredient for use, and the adsorbent is through calcining the back, and magnesium-containing compound can change into magnesium oxide, because magnesium oxide is alkaline metal oxide, consequently magnesium oxide crystal surface has Lewis acid activity reaction center, can high-efficiently and contain the reaction between the fluorine gas, and the fluoride that the reaction produced carries on magnesium oxide, can further promote the decomposition effect of adsorbent to fluorine-containing waste gas, and increased the selective adsorption effect of magnesium oxide to fluorinion.
In addition, the magnesium oxide can further activate the activity of the aluminum oxide after being matched with the rest materials in the active component. And can form MgO-Al in the adsorbent 2 O 3 The composite crystal structure is formed by combining magnesium oxide with fluorine element in advance to form metal fluoride when fluorine-containing waste gas is decomposed, and the composite crystal structure is decomposed by high heat generated by the reaction to expose gamma-Al 2 O 3 The crystal structure enables the adsorbent to continuously and efficiently decompose the fluorine-containing waste gas.
Preferably, the stabilizer comprises one or two of a calcium-containing compound and a zinc-containing compound, the calcium-containing compound comprises any one of calcium oxide and calcium carbonate, the zinc-containing compound comprises any one of zinc oxide and zinc carbonate, and the zinc-containing compound is of a catalyst grade.
By adopting the technical scheme, firstly, the calcium-containing compound is used as the stabilizer, and the calcium-containing compound has higher decomposition temperature and higher hardness, so that the calcium-containing compound can be stabilized in the adsorbent to play a supporting role, and the adsorbent particles can maintain the internal and surface pore structures. When the fluorine-containing waste gas is treated, the possibility of collapse of a pore structure caused by decomposition of the internal material of the adsorbent particles is reduced, and the adsorption and decomposition effects of the adsorbent on the fluorine-containing waste gas are improved.
Secondly, a zinc-containing compound is used as a stabilizer, and the zinc-containing compound also has higher decomposition temperature, so that the zinc-containing compound can support the adsorbent. In addition, the zinc-containing compound is added, so that the active component is doped with zinc element which can inhibit gamma-Al in the active component 2 O 3 Crystal form to alpha-Al 2 O 3 The transformation of crystal form can durably and efficiently decompose the fluorine-containing waste gas and reduce AlF generated by the reaction 3 The covering of the pore structure of the adsorbent can ensure that the adsorbent obtains long-term catalytic activity.
In addition, a calcium-containing compound and a zinc-containing compound are matched to serve as a stabilizer, so that on one hand, a stable supporting effect can be achieved in the adsorbent, namely the stabilizer and the alumina sol can be matched to form a stable cross-linked supporting framework, the pore structure in the adsorbent is maintained, and the reaction of the deep layer of the active component and the fluorine-containing waste gas is improved; on the other hand, can effectively inhibit gamma-Al in the active component 2 O 3 Crystal form to alpha-Al 2 O 3 Due to the transformation of the crystal form, the adsorbent can decompose the fluorine-containing waste gas for a long time and efficiently, and the adsorption effect of the adsorbent is stably improved.
Preferably, the catalyst comprises a titanium-containing compound, and the titanium-containing compound comprises any one of titanium oxide and titanium dioxide.
By adopting the technical scheme, the titanium-containing compound is preferably used as the catalyst and the titanium-containing compound is an amphoteric compound, when the titanium-containing compound is matched with the active component, the titanium-containing compound can be combined with a Lewis acid active reaction center on magnesium oxide, and the magnesium oxide is activated through Lewis acid-base reaction, so that the activity of the magnesium oxide is improved, a composite crystal structure can be formed between the magnesium oxide and aluminum oxide, and the catalytic activity of the adsorbent is promoted and improved gradually.
Preferably, the regulator comprises a silicon-containing compound, the silicon-containing compound comprises any one of silicon oxide and silicon dioxide, and the silicon-containing compound is a porous structure.
By adopting the technical scheme, the silicon-containing compound is adopted as the regulator in the technical scheme, and the mass of the silicon-containing compound is light, so that the density of the adsorbent slurry can be effectively adjusted by adjusting the addition amount of the silicon-containing compound, and the adsorbent can obtain a loose, porous and stable adsorption structure. In addition, the silicon-containing compound has a porous structure, so that the density of the adsorbent is adjusted, the pore structure in the adsorbent can be increased, and the contact area between the adsorbent and the fluorine-containing waste gas and the deep reaction effect are further increased.
In a second aspect, the present application provides a method for preparing an adsorbent for fluorine-containing gas, which adopts the following technical scheme:
a preparation method of an adsorbent for fluorine-containing gas comprises the following steps: s1, water doping treatment: mixing pseudo-boehmite with water to obtain alumina sol; s2, dry mixing: taking aluminum oxide powder, a titanium-containing compound, a magnesium-containing compound, a zinc-containing compound and a carbon-containing compound according to the formula, and dry-mixing for 10-30min to obtain a premix; s3, wet mixing: mixing the aluminum sol and the premix, and wet mixing for 5-20min to obtain a wet mixed material; s4, preparing an adsorbent: and (3) extruding and granulating the wet mixed material to obtain adsorbent particles, drying at 140 ℃ under 100-.
By adopting the technical scheme, the adsorbent is preferably prepared by adopting a dry mixing-wet kneading process in the technical scheme, the adsorbent with proper porosity can be obtained at a lower temperature, and a cross-linked network structure is introduced into the adsorbent by wet mixing, so that the internal pore structure of the adsorbent is increased, and the deep reaction of the adsorbent and the fluorine-containing waste gas is promoted. According to the technical scheme, the calcining temperature and the drying temperature of the adsorbent are optimized, so that the water in the aluminum sol is completely evaporated, and the influence of the aluminum sol residue on deep reaction of fluorine-containing waste gas and the adsorbent is reduced.
Preferably, the adsorbent particles have a length of 3 to 10mm and a diameter of 3 to 4 mm.
Through adopting above-mentioned technical scheme, this application technical scheme has optimized the length and the diameter of adsorbent granule, is favorable to the drying and the calcination of adsorbent granule complete, reduces the residue of aluminium sol, strengthens the pore integrity in the adsorbent, improves the catalytic effect of adsorbent.
Preferably, the mass fraction of the aluminum sol is 10-30%.
Through adopting above-mentioned technical scheme, this application technical scheme has optimized the mass fraction of aluminium sol, and suitable concentration for the aluminium sol can effectively bond all the other components in the adsorbent and form the crosslinked network structure, therefore the aluminium sol can cooperate jointly with the stabilizer and obtain firm crosslinked support skeleton, maintains the inside pore structure of adsorbent, effectively increases the area of contact between adsorbent and the fluorine-containing waste gas.
In summary, the present application has the following beneficial effects:
1. because the aluminum oxide powder is matched with the pseudo-boehmite, the active component with high specific surface area and high activity can be obtained, the decomposition effect of the adsorbent on the fluorine-containing waste gas is improved, and the aluminum oxide powder has better air permeability and formability, so that the adsorbent can obtain more pore structures and can maintain the form of the adsorbent particles; after the pseudo-boehmite is subjected to water doping treatment, uniformly dispersed aluminum sol can be formed, on one hand, the aluminum sol can bond the rest components in the adsorbent, and the structural stability of the adsorbent is improved; on the other hand, the aluminum sol can form a cross-linked network structure in the adsorbent, and after calcination treatment, the moisture of the aluminum sol volatilizes, so that a stable cross-linked skeleton structure is formed in the adsorbent, a stable pore structure can be obtained in the adsorbent, the surface catalytic effect of the adsorbent is enhanced, the deep catalytic effect of the adsorbent can be improved, and the adsorbent obtains a relatively excellent catalytic effect.
2. In the application, a calcium-containing compound and a zinc-containing compound are preferably matched, on one hand, the calcium-containing compound and the zinc-containing compound can be matched with alumina sol to obtain a stable cross-linked framework structure, so that the possibility of collapse of a pore structure in the adsorbent is reduced, and the deep reaction effect of the adsorbent and fluorine-containing waste gas is improved; on the other hand, gamma-Al in the adsorbent can be suppressed 2 O 3 Crystal form to alpha-Al 2 O 3 Of crystal formThe conversion maintains the catalytic activity of the adsorbent, so that the adsorbent can catalyze and decompose the fluorine-containing waste gas for a long time and with high efficiency, and therefore, the adsorbent obtains a long-acting and high-efficiency catalytic effect.
3. According to the method, the combination effect between the adsorbent particles can be increased, the calcination temperature is reduced, the adsorbent with a cross-linked network structure can be obtained, the adsorbent has better porosity and pore structure, and the deep reaction effect of the adsorbent and the fluorine-containing waste gas is improved in a dry mixing and wet kneading mode.
Drawings
Fig. 1 and 2 are EDX spectra of example 2 of the present application.
Detailed Description
The present application will be described in further detail with reference to examples.
In the embodiment of the present application, the selected apparatuses are as follows, but not limited thereto:
the instrument comprises the following steps: UV-759CRT double-beam scanning type ultraviolet-visible spectrophotometer of Qingdao Jue Chuang environmental protection group Limited.
Preparation example
Examples of preparation of stabilizers
Preparation example 1
A zinc-containing compound, zinc oxide in this preparation example, was used as stabilizer 1.
It is to be noted that the zinc-containing compound includes, but is not limited to, any one of zinc oxide and zinc carbonate.
Preparation example 2
The difference from preparation example 1 is that: catalyst grade zinc oxide was taken as stabilizer 2.
Preparation example 3
A calcium-containing compound, calcium carbonate in this preparation example, was taken as the stabilizer 3.
Among them, it is worth mentioning that the zinc-containing compound includes, but is not limited to, any one of calcium oxide and calcium carbonate.
Preparation examples 4 to 6
Mixing calcium-containing compound (calcium carbonate) and zinc-containing compound (zinc oxide) in the preparation example, the specific quality is shown in Table 1, and preparing into stabilizer 4-6
TABLE 1 preparation examples 4-6 stabilizer compositions
Examples of preparation of catalysts
Preparation example 7
Titanium-containing compounds, titanium dioxide was selected as the catalyst in this preparation example.
Of these, it is worth mentioning that titanium-containing compounds include, but are not limited to: titanium oxide or titanium dioxide.
Preparation of regulator
Preparation example 8
A silicon-containing compound, silica in this preparation example, was used as the conditioning agent 1.
Wherein, it is stated that the silicon-containing compounds include, but are not limited to: silicon oxide or silicon dioxide.
Preparation example 9
The difference from preparation example 8 is that: porous silica was used as modifier 2.
Examples
Examples 1 to 7
In one aspect, the present application provides an adsorbent for fluorine-containing gas, comprising an active component, a stabilizer, a catalyst and a regulator, wherein the specific mass is shown in table 2. Wherein the active components comprise alumina powder and pseudo-boehmite, the specific mass is shown in Table 3, and the pseudo-boehmite is subjected to water doping treatment.
In another aspect, the present application provides a method for preparing an adsorbent for a fluorine-containing gas, comprising the steps of:
water doping treatment: and mixing the pseudo-boehmite with water to prepare the aluminum sol with the mass fraction of 10%.
Dry mixing treatment: taking the rest of the active components, stabilizer, catalyst and regulator, stirring and mixing for 10min to obtain the premix.
And (3) wet mixing: and mixing the premix and the alumina sol, and kneading for 5min by a wet method to obtain a wet mixed material.
Preparing an adsorbent: and (2) placing the wet mixture into an extruder, extruding and granulating to obtain adsorbent particles, controlling the length of the adsorbent particles to be 3mm and the diameter to be 3mm, drying at 100 ℃ for 2h, drying at 400 ℃ for 1h, and cooling to obtain the adsorbent 1-7.
Table 2 examples 1-7 adsorption catalyst compositions
Table 3 examples 1-7 active ingredient compositions
Example 8
The difference from example 5 is that: the active component also includes 10kg of magnesium oxide to make adsorbent 8.
Example 9
The difference from example 2 is that: an adsorbent 9 was prepared using a stabilizer 2 in place of the stabilizer 1 in the example.
Example 10
The difference from example 3 is that: an adsorbent 10 was prepared using a stabilizer 3 instead of the stabilizer 1 in example 3.
Examples 11 to 13
The difference from example 4 is that: adsorbents 11 to 13 were prepared using stabilizers 4 to 6 instead of stabilizer 1 in example 4.
Example 14
The difference from example 2 is that: adsorbent 14 was prepared using regulator 2 instead of regulator 1 in example 2.
Example 15
The difference from example 2 is that: adsorbent 15 was prepared by controlling the particle size of the adsorbent particles to 5mm and the diameter to 3.5 mm.
Example 16
The difference from example 2 is that: the adsorbent 16 was prepared by controlling the particle size of the adsorbent to 10mm and the diameter to 4 mm.
Example 17
The difference from example 2 is that: dry mixing for 20min, wet mixing for 10min, drying at 120 ℃ for 2h, calcining at 600 ℃ for 1h, and cooling to obtain the adsorbent 17.
Example 18
The difference from example 2 is that: dry mixing for 30min, wet mixing for 20min, drying at 140 deg.C for 2h, calcining at 500 deg.C for 1h, and cooling to obtain adsorbent 18.
Examples 19 to 20
The difference from example 2 is that: respectively preparing 20 percent and 30 percent of aluminum sol by mass percent, and preparing 19-20 percent of adsorbent.
Comparative example
Comparative example 1
This comparative example is different from example 1 in that only the active component was used to prepare the adsorbent 21.
Comparative example 2
This comparative example is different from example 1 in that pseudo-boehmite is not subjected to water doping treatment to prepare adsorbent 22.
Performance test
(1) And (3) spectrogram analysis: example 2 was examined using EDX spectroscopy.
(2) And (3) detection of adsorption performance: respectively measuring 1-20 pairs of CF of adsorbent by adopting infrared spectrum analyzer 4 、SF 6 The adsorption effect of (1).
(3) And (3) density detection: adsorbents 1-4 and 19 were tested with a densitometer.
Table 4 examples 1-25 performance testing
Comparing the performance tests of FIGS. 1-2 and Table 4, it can be seen that:
(1) by combining examples 1-4 with comparative examples 1-2, it can be seen that: obtained in examples 1 to 4Para CF of adsorbent 4 And SF 6 The adsorption effect of the adsorbent is improved to some extent, the density is reduced, and this shows that the application optimizes the proportion of each component in the adsorbent, through the addition of the pseudo-boehmite, can form alumina sol with the cooperation of water, form the other components in the crosslinked structure connection adsorbent, after calcining, the water evaporation in the alumina sol can form firm crosslinked network structure in the adsorbent, and form pore structure, not only increase the catalytic decomposition effect of the adsorbent to fluorine-containing waste gas, but also can effectively improve the structural stability of the adsorbent, namely improve the deep catalytic effect of the adsorbent. As can be seen from Table 4, the adsorbent obtained in example 2 has a good adsorption effect and a suitable density, which indicates that the distribution of each component in the adsorbent is suitable.
(2) A comparison of examples 5 to 7 with example 2 shows that: para CF of adsorbents made in examples 5-7 4 And SF 6 The adsorption effect of the adsorbent is improved, and the density is reduced, which shows that the aluminum phosphate is added into the active component, and the aluminum phosphate is calcined to be converted into alumina with high specific surface area and high activity, so that the activity of the adsorbent can be further improved, and the catalytic decomposition effect of the adsorbent on the fluorine-containing waste gas is enhanced. As can be seen from Table 4, the adsorbent obtained in example 5 has a good adsorption effect and a suitable density, which indicates that the distribution of each component in the active components is suitable.
(3) A comparison of example 8, example 9 and example 10 can be found: para-CF of adsorbents made in examples 8-10 4 And SF 6 The adsorption effect of the adsorbent is improved, and the density is reduced, which shows that the composite crystal structure is formed by adding magnesium oxide into the active component, and the magnesium oxide is reacted with the magnesium oxide in advance to excite the activity of the aluminum oxide when the fluorine-containing waste gas is decomposed, so that the composite crystal structure can be decomposed, and the catalytic activity of the adsorbent is improved. By adding zinc oxide, the crystal transformation in the aluminum oxide can be inhibited. The addition of calcium dioxide can increase the hardness of the alumina and maintain the stability of the pore structure.
(4) A comparison of examples 11 to 13 with example 2 shows that: obtained in examples 11 to 13Of the adsorbent of 4 And SF 6 The adsorption effect is improved to some extent, and the density is reduced to some extent, and this shows that this application adopts calcium carbonate and zinc oxide cooperation, not only can increase the hardness of adsorbent, maintains the stability of pore structure to crystal form changes in can effectively inhibiting aluminium oxide, maintains the catalytic decomposition effect of adsorbent to fluorine-containing waste gas. As can be seen from Table 4, the adsorbent obtained in example 12 has a good adsorption effect and a suitable density, which indicates that the components of the stabilizer are suitably distributed.
(5) A comparison of examples 15 to 16, examples 17 to 18 and example 2 shows that: para CF of adsorbents made in examples 15-18 4 And SF 6 The adsorption effect is improved to some extent, and the density is reduced to some extent, which shows that the application optimizes the diameter, the length, the calcining temperature and the like of the adsorbent particles, so that the adsorbent particles can be effectively dried, and the internal pore diameter is stable. As can be seen from table 4, the adsorbents obtained in examples 15 and 17 have better adsorption effect and appropriate density, which indicates that the particle size and diameter of the adsorbent in example 15 are appropriate and the calcination temperature in example 17 is appropriate.
(6) A comparison of examples 19 to 20 with example 2 shows that: para CF of adsorbents made in examples 19-20 4 And SF 6 The adsorption effect is improved to some extent, and the density is reduced to some extent, which shows that the application optimizes the mass fraction of the alumina sol in the adsorbent, so that the combination of all components in the adsorbent is firmer, more complete particles can be extruded, a proper cross-linked network structure can be formed, and a stable pore structure is formed in the adsorbent. The mass fraction is too high, and a cross-linked structure brought by the aluminum sol is aggregated, so that the internal pore structure of the adsorbent is unevenly distributed. The mass fraction of the alumina sol is too low, so that a compact pore structure is not easily formed in the adsorbent, and the adsorption catalysis effect of the adsorbent is poor. As can be seen from table 4, the adsorbent obtained in example 19 has a good adsorption effect and a suitable density, and the mass fraction of the alumina sol in example 19 is suitable.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The adsorbent for the fluorine-containing gas is characterized by comprising the following substances in parts by weight: 40-90 parts of active component, 10-60 parts of stabilizer, 0-0.3 part of catalyst and 0-0.4 part of regulator, wherein the active component comprises alumina powder and pseudo-boehmite, and the pseudo-boehmite is subjected to water mixing treatment to obtain alumina sol.
2. The adsorbent for fluorine-containing gas according to claim 1, wherein: the active component also comprises aluminum phosphate, and the mass ratio of the alumina powder to the pseudo-boehmite to the aluminum phosphate is 40:1-3: 2-4.
3. The adsorbent for fluorine-containing gas according to claim 2, characterized in that: the active component also comprises a magnesium-containing compound, and the magnesium-containing compound comprises any one of magnesium oxide and magnesium carbonate.
4. The adsorbent for fluorine-containing gas according to claim 1, characterized in that: the stabilizer comprises one or two of a calcium-containing compound and a zinc-containing compound, wherein the calcium-containing compound comprises any one of calcium oxide, calcium carbonate and calcium hydroxide, the zinc-containing compound comprises any one of zinc oxide and zinc carbonate, and the zinc-containing compound is of a catalyst grade.
5. The adsorbent for fluorine-containing gas according to claim 1, wherein: the catalyst comprises a titanium-containing compound, and the titanium-containing compound comprises any one of titanium oxide and titanium dioxide.
6. The adsorbent for fluorine-containing gas according to claim 1, wherein: the regulator comprises a silicon-containing compound, the silicon-containing compound comprises any one of silicon oxide and silicon dioxide, and the silicon-containing compound is of a porous structure.
7. The method for producing an adsorbent for a fluorine-containing gas according to any one of claims 1 to 6, comprising the steps of:
s1, water doping treatment: mixing pseudo-boehmite with water to obtain alumina sol;
s2, dry mixing: taking aluminum oxide powder, a titanium-containing compound, a magnesium-containing compound, a zinc-containing compound and a carbon-containing compound according to the formula, and dry-mixing for 10-30min to obtain a premix;
s3, wet mixing: mixing the aluminum sol and the premix, and wet mixing for 5-20min to obtain a wet mixed material;
s4, preparation of an adsorbent: and (3) extruding and granulating the wet mixed material to obtain adsorbent particles, drying at 140 ℃ under 100-.
8. The method according to claim 7, wherein the adsorbent for fluorine-containing gas comprises: the length of the adsorbent particles is 3-10mm, and the diameter of the adsorbent particles is 3-4 mm.
9. The method according to claim 7, wherein the adsorbent for fluorine-containing gas comprises: the mass fraction of the aluminum sol is 10-30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210590833.2A CN114950339A (en) | 2022-05-27 | 2022-05-27 | Adsorbent for fluorine-containing gas and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210590833.2A CN114950339A (en) | 2022-05-27 | 2022-05-27 | Adsorbent for fluorine-containing gas and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114950339A true CN114950339A (en) | 2022-08-30 |
Family
ID=82956850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210590833.2A Pending CN114950339A (en) | 2022-05-27 | 2022-05-27 | Adsorbent for fluorine-containing gas and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114950339A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5948726A (en) * | 1994-12-07 | 1999-09-07 | Project Earth Industries, Inc. | Adsorbent and/or catalyst and binder system and method of making therefor |
| US6023007A (en) * | 1997-03-24 | 2000-02-08 | Showa Denko K.K. | Catalytic decomposition of perfluoro-compound |
| US6162957A (en) * | 1997-03-24 | 2000-12-19 | Showa Denko K.K. | Catalytic decomposition of perfluoro-compound |
| JP2001232152A (en) * | 1997-06-20 | 2001-08-28 | Hitachi Ltd | Decomposition treating method of fluorine-containing compound, catalyst and decomposition treating device |
| CN101007237A (en) * | 2006-01-26 | 2007-08-01 | 高化环保技术有限公司 | Cleaning apparatus of exhaust gas produced from semiconductor production process and method thereof |
| JP2007237150A (en) * | 2006-02-16 | 2007-09-20 | Akiji Nishiwaki | Catalyst detoxifying treatment method of emission gas |
| CN101450273A (en) * | 2007-11-28 | 2009-06-10 | 财团法人工业技术研究院 | Treatment method of fluorochemical gas |
| CN106999909A (en) * | 2014-11-25 | 2017-08-01 | 格瑞福技术有限公司 | For fluorine ion and phosphorus, the high power capacity adsorbent of the oxo-anions of arsenic and preparation method thereof |
| CN110740809A (en) * | 2017-06-16 | 2020-01-31 | 日商科莱恩触媒股份有限公司 | Agent for decomposition and removal of fluorine-containing gas, method for producing same, method for removing fluorine-containing gas using same, and method for recovering fluorine resource |
| CN110772947A (en) * | 2018-07-30 | 2020-02-11 | 日商科莱恩触媒股份有限公司 | Halogen gas remover, and preparation method, removing device, monitoring method and removing method thereof |
| CN111715179A (en) * | 2019-03-21 | 2020-09-29 | 霍尼韦尔特性材料和技术（中国）有限公司 | Water purification composition, preparation method and application thereof |
-
2022
- 2022-05-27 CN CN202210590833.2A patent/CN114950339A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5948726A (en) * | 1994-12-07 | 1999-09-07 | Project Earth Industries, Inc. | Adsorbent and/or catalyst and binder system and method of making therefor |
| US6023007A (en) * | 1997-03-24 | 2000-02-08 | Showa Denko K.K. | Catalytic decomposition of perfluoro-compound |
| US6162957A (en) * | 1997-03-24 | 2000-12-19 | Showa Denko K.K. | Catalytic decomposition of perfluoro-compound |
| JP2001232152A (en) * | 1997-06-20 | 2001-08-28 | Hitachi Ltd | Decomposition treating method of fluorine-containing compound, catalyst and decomposition treating device |
| CN101007237A (en) * | 2006-01-26 | 2007-08-01 | 高化环保技术有限公司 | Cleaning apparatus of exhaust gas produced from semiconductor production process and method thereof |
| JP2007237150A (en) * | 2006-02-16 | 2007-09-20 | Akiji Nishiwaki | Catalyst detoxifying treatment method of emission gas |
| CN101450273A (en) * | 2007-11-28 | 2009-06-10 | 财团法人工业技术研究院 | Treatment method of fluorochemical gas |
| CN106999909A (en) * | 2014-11-25 | 2017-08-01 | 格瑞福技术有限公司 | For fluorine ion and phosphorus, the high power capacity adsorbent of the oxo-anions of arsenic and preparation method thereof |
| CN110740809A (en) * | 2017-06-16 | 2020-01-31 | 日商科莱恩触媒股份有限公司 | Agent for decomposition and removal of fluorine-containing gas, method for producing same, method for removing fluorine-containing gas using same, and method for recovering fluorine resource |
| CN110772947A (en) * | 2018-07-30 | 2020-02-11 | 日商科莱恩触媒股份有限公司 | Halogen gas remover, and preparation method, removing device, monitoring method and removing method thereof |
| CN111715179A (en) * | 2019-03-21 | 2020-09-29 | 霍尼韦尔特性材料和技术（中国）有限公司 | Water purification composition, preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 郑水林 编著: "《粉体表面改性 第2版》", 北京：中国建材工业出版社, pages: 238 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1063353C (en) | NOX adsorbent | |
| CN103212288B (en) | A kind of method for removing acrylonitrile waste gas | |
| US5670124A (en) | Nitrogen-containing molecular sieving carbon, a process for preparing the same and use thereof | |
| Jarczewski et al. | Energy-balanced and effective adsorption-catalytic multilayer bed system for removal of volatile organic compounds | |
| JP2010005542A (en) | Perfluorocarbon adsorbent and perfluorocarbon detoxifying process using the same | |
| CN108067181B (en) | High-selectivity carbon monoxide absorbent and preparation method thereof | |
| Manianglung et al. | Synergistic effect of blended primary and secondary amines functionalized onto the silica on CO 2 capture performance | |
| CN114950339A (en) | Adsorbent for fluorine-containing gas and preparation method thereof | |
| CN106064053A (en) | A kind of flue gas demercuration adsorbent and preparation method thereof | |
| Fu et al. | Carbon dioxide capture by MgO-modified MCM-41 materials | |
| CN104307463B (en) | A kind of chemical modification calcium base CO 2adsorbent and preparation method thereof | |
| KR20230167939A (en) | Ozone decomposing catalyst and method for fabricating the same | |
| RU2701028C1 (en) | Method of producing sorbent for acid gas absorption | |
| CN110479233B (en) | Photocatalyst particles with high ultraviolet light utilization rate for purifying air and preparation method thereof | |
| Yang et al. | Preparation of triethylenetetramine‐modified zirconosilicate molecular sieve for carbon dioxide adsorption | |
| JP2016193957A (en) | Porous coordination polymer | |
| RU2281159C1 (en) | Method of production of chemisorbent | |
| RU2323877C1 (en) | Method to manufacture chemisorbent | |
| EP4335816A1 (en) | Carbon dioxide processing agent and method for producing same | |
| KR102641139B1 (en) | Manufacturing method of zeolite composites for volatile organic compounds adsorption-oxidation | |
| JP3282238B2 (en) | Method for producing chemical activated carbon | |
| JP2023552248A (en) | gas filter | |
| JPH08229354A (en) | Treatment of organic halogen compound with catalyst | |
| KR102349738B1 (en) | Manufacturing method of Nickel based active catalysts | |
| KR102208787B1 (en) | Metal catalyst composition for the decomposition of ionic liquid monopropellant and preparation method thereof |
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 |