CN115999524A - Alumina-based catalyst, and preparation method and application thereof - Google Patents
Alumina-based catalyst, and preparation method and application thereof Download PDFInfo
- Publication number
- CN115999524A CN115999524A CN202211695426.4A CN202211695426A CN115999524A CN 115999524 A CN115999524 A CN 115999524A CN 202211695426 A CN202211695426 A CN 202211695426A CN 115999524 A CN115999524 A CN 115999524A
- Authority
- CN
- China
- Prior art keywords
- alumina
- based catalyst
- aluminum
- active component
- catalyst
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003054 catalyst Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 230000009467 reduction Effects 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 239000002244 precipitate Substances 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 6
- 239000002243 precursor Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000003760 magnetic stirring Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical group 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 238000000967 suction filtration Methods 0.000 claims description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims 2
- 238000011068 loading method Methods 0.000 claims 2
- HDYRYUINDGQKMC-UHFFFAOYSA-M acetyloxyaluminum;dihydrate Chemical compound O.O.CC(=O)O[Al] HDYRYUINDGQKMC-UHFFFAOYSA-M 0.000 claims 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims 1
- 229940009827 aluminum acetate Drugs 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 28
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 14
- 239000007789 gas Substances 0.000 abstract description 14
- 239000001569 carbon dioxide Substances 0.000 abstract description 8
- 238000005984 hydrogenation reaction Methods 0.000 abstract description 8
- 230000004913 activation Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000006555 catalytic reaction Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000005431 greenhouse gas Substances 0.000 abstract description 2
- 210000002381 plasma Anatomy 0.000 abstract 3
- 238000001556 precipitation Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 6
- 239000001099 ammonium carbonate Substances 0.000 description 6
- 235000012501 ammonium carbonate Nutrition 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000012018 catalyst precursor Substances 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910016523 CuKa Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000012494 Quartz wool Substances 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- -1 aluminum salt Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 1
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013335 mesoporous material Substances 0.000 description 1
- 229910001960 metal nitrate Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Catalysts (AREA)
Abstract
The invention belongs to the field of carbon dioxide emission reduction, and discloses a method for CO2 hydrogenation combined production of synthetic gas, which converts greenhouse gases into CH4 and CO with high added values. It relates to the activation of the aforementioned CO2 and H2 molecules by dielectric discharge, and the formation of uniformly distributed non-equilibrium plasma, and the hydrogenation reaction in a reactor takes place by the catalysis of a catalyst to produce CH4 and CO with high added values. In particular to a preparation method of an alumina catalyst loaded with an active metal component. The invention adopts a precipitation method to prepare the alumina-based catalyst loaded with the active metal component. The invention is technically characterized in that a high-activity catalyst is used under mild conditions by utilizing plasma discharge. And then the high-efficiency activation of the plasmas to the CO2 and the H2 is utilized, and the rapid conversion to the CH4 and the H2 with high added values is realized under the catalysis of the metal catalyst.
Description
Technical Field
The invention belongs to the field of carbon dioxide emission reduction, and discloses an alumina-based catalyst, a preparation method and application thereof.
Background
The processes adopted in the aluminum industry, such as bauxite exploitation, alumina extraction, anode manufacturing, electrolysis, ingot casting and the like, have high energy consumption and generate a large amount of harmful substances. CO during its production 2 Mainly from direct emissions during the production of the product, including fuel consumption and CO produced during the production 2 Fuel consumption such as CO produced by combustion of coal, oil and natural gas required in alumina production 2 The production process mainly discharges CO generated by the consumption of the carbon electrode along with the progress of the reaction 2 It was calculated that the consumption of the carbon electrode during electrolysis released about 1.5 tons of CO per 1 ton of aluminum produced 2 The method comprises the steps of carrying out a first treatment on the surface of the The auxiliary raw material part refers to CO generated from auxiliary raw materials such as lime required in aluminum oxide smelting, aluminum fluoride required in aluminum electrolysis production and preparation process 2 The method comprises the steps of carrying out a first treatment on the surface of the Indirect emission refers to the emission of CO from electricity required in the production of a product 2 The amount of this portion is closely related to the power generation structure.
The electrolytic aluminum in China has high power consumption and high carbon dioxide emission. The total discharge of the electrolytic aluminum industry in China is about 4.26 hundred million tons, which accounts for 5 percent of the total net discharge of carbon dioxide in the whole society, each ton of electrolytic aluminum is produced, the carbon dioxide discharged by the produced electric power is 10.7 tons, which accounts for 64.8 percent of the carbon discharge of each ton of electrolytic aluminum. Therefore, the use of clean electricity in production is an important measure for achieving carbon peak and carbon neutralization in the nonferrous metal industry.
In summary, carbon dioxide in the aluminum industry mainly comes from fossil fuel combustion emission, production process emission and electric power emission, and the total emission of carbon dioxide in the nonferrous metal industry in China in 2020 is about 6.5 hundred million tons, accounting for 6.5% of the total emission in China, and the emission of carbon dioxide in electrolytic aluminum is about 4.2 hundred million tons. It is expected that carbon emissions in the nonferrous metal industry will reach 7.5 million tons by 2025; the carbon emissions of the aluminum industry are expected to reach 6 hundred million tons by 2025. Can be recycled to realize the dual significance of economy and environmental protection.
The low-temperature plasma has wide application (Spectrochim. Acta Part B,2006,61,2-30) in the fields of micromolecule activation reaction, initiation polymerization, surface treatment, ozone synthesis, catalyst preparation and the like, and is characterized in that the low-temperature plasma can realize the activation conversion of molecules at low temperature. At present, plasma is used for CO 2 The conversion is mainly applied to CO and CH 4 And the like (Fuel process.technology., 199,58,119-134). CO-realization using plasma and catalyst 2 No technology of hydroconversion reaction is reported. Against the existing in the prior artThe invention aims to provide an alumina-based catalyst and a preparation method thereof, and the prepared catalyst has excellent activity, selectivity and stability and can be used for CO 2 CO-plasma CO during hydrogenation 2 、H 2 Realizing CO under low temperature and low pressure conditions 2 High efficiency conversion.
Disclosure of Invention
The invention aims to provide a mesoporous alumina-based catalyst and a preparation method thereof, which are used for CO in a plasma state 2 And (3) hydrogenation catalysis. The prepared catalyst has excellent activity, selectivity and stability, and can be used for CO 2 CO-plasma CO during hydrogenation 2 、H 2 Realizing CO under low temperature and low pressure conditions 2 High efficiency conversion.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an alumina-based catalyst, which comprises a carrier and an active component loaded on the surface of the carrier; the carrier is alumina, the active component is metal oxide, and the metal element in the active component comprises at least one of Ru, rh, fe, co, ni, cu, mn, zn, ag, au, pt, pd and Cr.
Preferably, the active component is supported in an amount of 1 to 50%.
The invention provides a preparation method of the alumina-based catalyst, which comprises the following steps:
(1) Dissolving a certain amount of aluminum precursor (aluminum salt) and active component precursor (metal salt) in a certain proportion into a proper amount of deionized water, stirring for 30-60 min, and uniformly mixing to obtain solution A; and dissolving a certain amount of precipitant into a proper amount of deionized water, and stirring for 30-60 min to obtain a solution B.
(2) Dropwise adding the solution B into the solution A under the condition of magnetic stirring, monitoring the pH of the mixed solution in real time, stopping adding dropwise when the pH of the solution is stabilized to 6-9, continuously stirring for 2-4 h to generate precipitate, and obtaining the precipitate B through the steps of suction filtration, washing and the like.
(3) Aging the precipitate B obtained in the step (2) for 12 hours at room temperature, drying for 8-12 hours at 100-120 ℃, and roasting for 3-6 hours in an air atmosphere at 400-700 ℃ to obtain a solid C;
(4) And crushing and screening the solid C to obtain the alumina-based catalyst.
Preferably, the granularity of the mesoporous alumina is 40-60 meshes.
Preferably, the metal salt is a metal nitrate.
Preferably, the roasting tool is a muffle furnace, more preferably a microwave muffle furnace.
Preferably, in the stirring process, the stirring temperature is 40-50 ℃.
The invention provides the CO of the alumina-based catalyst in a synergistic plasma state, which is prepared by the technical scheme or the preparation method 2 、H 2 Conversion to high value added CH 4 And the use of CO.
The invention provides an alumina-based catalyst, which comprises a carrier and an active component loaded on the surface of the carrier; the carrier is alumina material, and the metal element in the active component comprises at least one of Ru, rh, fe, co, ni, cu, mn, zn, ag, au, pt, pd and Cr. The invention takes alumina as a carrier, utilizes the abundant pore structure of mesoporous alumina and better metal oxide dispersibility, and simultaneously takes the metal oxide of a specific kind as an active component, thus being capable of realizing CO 2 And H 2 To CH 4 And high efficiency of CO conversion, and lower experimental temperatures are required. Experimental results of the examples show that under the condition of performance test, the alumina-based catalyst provided by the invention is used for preparing CO 2 And H 2 To CH 4 And CO conversion efficiency is high, and the method has no special requirement or limitation on the source and composition of the gas, thus CH with various compositions 2 、H 2 Has universality.
The preparation method of the alumina catalyst provided by the invention is simple to operate, wide in raw material sources, low in cost and easy to realize industrial application.
The invention is technically characterized in thatThe plasma discharge is utilized to use a catalyst with high activity under mild conditions, and the plasma is utilized to recycle CO 2 And H 2 High-efficiency activation and rapid conversion under the catalysis of a metal catalyst.
The method has the beneficial effects that the greenhouse gas CO2 is converted into CH4 and CO with additional values, and the method has no requirement or special limitation on the gas composition and has universality on CO2 and H2.
1. The CO2 and H2 molecules are activated by a dielectric barrier discharge and form a uniformly distributed non-equilibrium plasma.
2. The medium can be discharged by using an alternating current power supply or a direct current power supply.
3. The reactor forms employed are fixed bed reactors, including (wire-plate, plate-plate, wire-cylinder, etc.)
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an XRD comparison of homemade alumina and commercially available alumina of example 1;
FIG. 2 is a graph showing comparison of adsorption/desorption isotherms and pore size distribution of self-made alumina and commercially available alumina in example 1;
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
37.5g (0.1 mol) of aluminum nitrate (Al (NO) 3 ) 3 ) Dissolving in 100mL deionized water, stirring for 30-60 min, and uniformly mixing to obtain an aluminum nitrate solution; 19.2g (0.2 mol) of ammonium carbonate ((NH 4) 2CO 3) was dissolved in 200mL of deionized water, and stirred for 30 minutes to obtain an ammonium carbonate solution. Dropwise adding an ammonium carbonate solution into an aluminum nitrate solution under the condition of magnetic stirring, monitoring the pH value of the mixed solution in real time, stopping adding dropwise when the pH value of the solution is stabilized to 7, continuing stirring for 2 hours to generate a precipitate, and filtering and washing to obtain the precipitate. Aging the precipitate at room temperature for 12 hours, drying at 100 ℃ for 12 hours, and then roasting in an air atmosphere at 600 ℃ for 5 hours by using a microwave muffle furnace; and crushing the obtained solid, and screening out particles with 40-60 meshes to obtain the alumina carrier.
Example 2
37.5g (0.1 mol) of aluminum nitrate (Al (NO) 3 ) 3 ) And 3.7g (0.025 mol) of cobalt nitrate (Co (NO) 3 ) 2 ) Dissolving in 100mL of deionized water, stirring for 30min, and uniformly mixing to obtain a mixed solution, wherein Co/(Co+Al) =20%; 19.2g (0.2 mol) of ammonium carbonate ((NH 4) 2CO 3) was dissolved in 200mL of deionized water, and stirred for 30 minutes to obtain an ammonium carbonate solution. Dropwise adding an ammonium carbonate solution into an aluminum nitrate solution under the condition of magnetic stirring, monitoring the pH value of the mixed solution in real time, stopping adding dropwise when the pH value of the solution is stabilized to 7, continuing stirring for 2 hours to generate a precipitate, and filtering and washing to obtain the precipitate. Aging the precipitate at room temperature for 12 hours, drying at 100 ℃ for 12 hours, and then roasting in an air atmosphere at 600 ℃ for 5 hours by using a microwave muffle furnace; and (3) crushing the obtained solid, and screening out particles with 40-60 meshes to obtain the cobalt-loaded alumina carrier, wherein the cobalt-loaded mole fraction is 20mol%.
Characterization analysis was performed on the mesoporous alumina-based catalyst prepared in example 1. The structure of the relevant crystalline material was determined by means of a D/MAX-2200X-ray diffractometer. CuKa radiation (λ= 0.15406 nm), voltage 36kV, current 30mA, scan range 20-80 °, scan speed 5 °/min.
FIG. 1 shows the self-oxygen production in example 1XRD contrast pattern of aluminum oxide versus commercial alumina; as can be seen from fig. 1, the self-made alumina has better crystallinity than the commercially available alumina; while the crystal phase of self-made alumina is mainly gamma phase (gamma-Al 2 O 3 ) Mainly, gamma-Al 2 O 3 Known as activated alumina, has a larger specific surface area and pore volume than other crystalline phases of alumina.
FIG. 2 is a BET comparison of the homemade alumina and commercially available alumina of example 1; as can be seen from fig. 2, according to IUPAC classification, the adsorption isotherms of both aluminas are of type IV adsorption isotherms, which illustrates that both aluminas are mesoporous materials with a regular pore structure. However, the hysteresis loops of the two aluminas are not the same, the hysteresis loop of the self-made alumina is H-2 type, and the hysteresis loop of the commercial alumina is H-1 type.
Table 1 is a plot of the specific surface area and pore volume of the self-made alumina versus the commercially available alumina of example 1; as can be seen from Table 1, the self-made alumina has a larger specific surface area and a higher pore volume than the commercially available alumina.
Table 1:
experimental example 3
This example will give the conditions for the plasma reduction and hydrogenation of the catalyst precursor and the analysis methods and conditions for the inlet and outlet gases, giving CO 2 Effect of hydrogenation reaction.
The catalyst precursor (0.88 g) obtained in example 1 was charged into a quartz tube having an inner diameter of 8 mm and an outer diameter of 10mm, the catalyst precursor was fixed with quartz wool at both ends, hydrogen gas (flow: 80m 1/min) was introduced, and the catalyst was reduced under plasma conditions (total input power 50VX0.40A) for 30 minutes to obtain a supported Co catalyst. Will H 2 The flow is regulated to 50m1/min, and CO is introduced 2 (flow: 10m 1/min), the input voltage of the plasma reactor was adjusted to 45V, the corresponding input current was 0.30A, and CO was started 2 Is added to the hydrogenation reaction.
CO in inlet and outlet gas 2 、CH 4 And the CO content was measured by gas chromatography (GC-7890), the detector was TCD, and the column was GDX502.
CO 2 The conversion rate calculation formula is:
CO 2 percent conversion = { inlet gas CO 2 Area-outlet gas CO 2 Area } \inlet gas CO 2 Peak area } ×100%.
CO selectivity% = outlet gas CO peak area }/{ outlet gas CO area + outlet gas CH 4 Area } ×100%.
CH 4 Selectivity% = outlet gas CH4 peak area }/{ outlet gas CO area + outlet gas CH 4 Area } ×100%.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. An alumina-based catalyst, characterized by comprising a carrier and an active component supported on the surface of the carrier; the carrier is alumina, the active component is metal oxide, and the metal element in the active component comprises at least one of Ru, rh, fe, co, ni, cu, mn, zn, ag, au, pt, pd and Cr.
2. The alumina-based catalyst of claim 1, wherein the loading of the active component is from 1 to 60%.
3. The alumina-based catalyst of claim 2, wherein the loading of the active component is from 1 to 50%.
4. A method for producing an alumina-based catalyst according to any one of claims 1 to 3, comprising the steps of:
dissolving a certain amount of aluminum precursor and active component precursor in a proper amount of deionized water according to a certain proportion, magnetically stirring for 30-60 min, and uniformly mixing to obtain a solution A; dissolving a certain amount of precipitant in a proper amount of deionized water, and magnetically stirring for 30-60 min to obtain a solution B;
dropwise adding the solution B into the solution A under the condition of magnetic stirring, monitoring the pH of the mixed solution in real time, stopping dropwise adding when the pH of the solution is stabilized to 6-9, continuously stirring for 2-4 hours to generate precipitate, and obtaining the precipitate B through the steps of suction filtration, washing and the like;
aging the precipitate B obtained in the step (2) for 12 hours at room temperature, drying for 8-12 hours at 100-120 ℃, and roasting for 3-6 hours in an air atmosphere at 400-700 ℃ to obtain a solid C;
and crushing and screening the solid C to obtain the alumina-based catalyst.
5. The process according to claim 4, wherein the alumina-based catalyst has a particle size of 40 to 60 mesh.
6. The method of claim 4, wherein the aluminum salt in the aluminum precursor is one of aluminum sulfate, aluminum nitrate, aluminum acetate and aluminum chloride; the metal salt in the active component precursor is at least one of Ru, rh, fe, co, ni, cu, mn, zn, ag, au, pt, pd and Cr;
7. the method according to any one of claims 4 to 6, wherein the molar fraction of the active metal component is 1 to 50%.
8. The method according to claim 4, wherein the stirring temperature is 30-60℃and the stirring speed is 300-800 r/min during the magnetic stirring treatment.
9. The method according to claim 4, wherein the metal catalyst is reduced by a temperature programmed reduction method, an organic reduction method or a hydrogen plasma reduction method.
10. An alumina-based catalyst as claimed in any one of claims 1 to 3 or CO in a CO-plasma state as obtainable by a process as claimed in any one of claims 6 to 9 2 、H 2 Conversion to high value added CH 4 And the use of CO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211695426.4A CN115999524A (en) | 2022-12-28 | 2022-12-28 | Alumina-based catalyst, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211695426.4A CN115999524A (en) | 2022-12-28 | 2022-12-28 | Alumina-based catalyst, and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115999524A true CN115999524A (en) | 2023-04-25 |
Family
ID=86027779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211695426.4A Pending CN115999524A (en) | 2022-12-28 | 2022-12-28 | Alumina-based catalyst, and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115999524A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880214A (en) * | 2010-06-08 | 2010-11-10 | 大连理工大学 | Method for non-thermal plasma and transition metal concerted catalysis CO2 hydrogenation |
| CN111330534A (en) * | 2020-03-11 | 2020-06-26 | 昆明理工大学 | Mesoporous alumina-based adsorbent and preparation method and application thereof |
| CN114433095A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Nickel catalyst and preparation method and application thereof |
-
2022
- 2022-12-28 CN CN202211695426.4A patent/CN115999524A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880214A (en) * | 2010-06-08 | 2010-11-10 | 大连理工大学 | Method for non-thermal plasma and transition metal concerted catalysis CO2 hydrogenation |
| CN111330534A (en) * | 2020-03-11 | 2020-06-26 | 昆明理工大学 | Mesoporous alumina-based adsorbent and preparation method and application thereof |
| CN114433095A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Nickel catalyst and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108855109A (en) | A kind of chemical chain partial oxidation methane preparing synthetic gas carrier of oxygen and its preparation method and application | |
| JPWO2019059190A1 (en) | Composite oxides, metal supports and ammonia synthesis catalysts | |
| CN109833877B (en) | Catalyst for preparing synthesis gas by oxidizing methane through chemical chain part and preparation and application thereof | |
| Gai et al. | An alternative scheme of biological removal of ammonia nitrogen from wastewater–highly dispersed Ru cluster@ mesoporous TiO2 for the catalytic wet air oxidation of low-concentration ammonia | |
| Liang et al. | CO hydrogenation over nanometer spinel-type Co/Mn complex oxides prepared by sol-gel method | |
| CN111250094B (en) | Double Z type Co3O4/NiCo2O4/NiO photocatalyst and preparation method and application thereof | |
| CN111359664A (en) | Ti-based MOF composite material and preparation method and application thereof | |
| CN109395735A (en) | A kind of methanation catalyst, preparation method and the method for preparing methane using it | |
| CN115770590A (en) | Bi with interface defects 2 S 3 /ZnS composite photocatalyst and preparation method and application thereof | |
| CN109847779B (en) | g-C3N4-MP-MoS2Composite material and preparation method and application thereof | |
| Wang et al. | Effect of filling materials on CO2 conversion with a dielectric barrier discharge reactor | |
| CN113600202A (en) | Catalyst for decomposing nitrous oxide, preparation method thereof and nitrous oxide decomposition method | |
| CN115999524A (en) | Alumina-based catalyst, and preparation method and application thereof | |
| CN115318298B (en) | Copper-based three-way catalyst for preparing methanol by carbon dioxide hydrogenation and preparation method and application thereof | |
| CN114471624B (en) | NiSe 2 /Mn 0.3 Cd 0.7 S heterojunction photocatalyst, and in-situ synthesis method and application thereof | |
| CN114870899B (en) | Photocatalytic CO 2 Composite photocatalyst for decomposing and preparing synthetic gas and preparation method thereof | |
| CN114425392A (en) | Carbon-nitrogen-based composite material, preparation method and application thereof | |
| CN113145127B (en) | Cu catalyst for preparing hydrogen by reforming methanol and steam, and preparation method and application thereof | |
| CN109569617B (en) | Catalyst for preparing synthesis gas by double reforming of coke oven gas and preparation method and application thereof | |
| CN110038574A (en) | A kind of derivative catalyst and its preparation method and application with spinel structure of sepiolite | |
| CN114477298B (en) | Composite oxide and preparation method and application thereof | |
| CN114849761B (en) | Photocatalytic material and preparation method and application thereof | |
| CN115784315B (en) | Oxygen carrier for efficient carbon dioxide trapping based on chemical looping combustion and preparation method and application thereof | |
| CN112871177B (en) | Application of hexaaluminate high-temperature resistant catalytic material in ammonolysis reaction | |
| CN114618475B (en) | Preparation method of flexible manganese-based catalyst for decomposing ozone |
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 |