CN114917906A - Preparation method of supported copper oxide catalyst - Google Patents
Preparation method of supported copper oxide catalyst Download PDFInfo
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- CN114917906A CN114917906A CN202210419107.4A CN202210419107A CN114917906A CN 114917906 A CN114917906 A CN 114917906A CN 202210419107 A CN202210419107 A CN 202210419107A CN 114917906 A CN114917906 A CN 114917906A
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- oxide catalyst
- copper oxide
- nitrate
- alumina
- loaded
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- 239000003054 catalyst Substances 0.000 title claims abstract description 34
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000005751 Copper oxide Substances 0.000 title claims abstract description 29
- 229910000431 copper oxide Inorganic materials 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 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 49
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000005470 impregnation Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 14
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 12
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000011068 loading method Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 5
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 6
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims description 6
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 4
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 claims description 4
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims description 4
- 229910001981 cobalt nitrate Inorganic materials 0.000 claims description 4
- 229910001431 copper ion Inorganic materials 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 3
- WFLYOQCSIHENTM-UHFFFAOYSA-N molybdenum(4+) tetranitrate Chemical compound [N+](=O)([O-])[O-].[Mo+4].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-] WFLYOQCSIHENTM-UHFFFAOYSA-N 0.000 claims description 2
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims description 2
- KUJRRRAEVBRSIW-UHFFFAOYSA-N niobium(5+) pentanitrate Chemical compound [Nb+5].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O KUJRRRAEVBRSIW-UHFFFAOYSA-N 0.000 claims description 2
- 150000002823 nitrates Chemical class 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 abstract description 11
- 238000009827 uniform distribution Methods 0.000 abstract description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000012855 volatile organic compound Substances 0.000 description 4
- 239000010815 organic waste Substances 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/72—Copper
-
- 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
- B01D53/864—Removing carbon monoxide or hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
Abstract
The embodiment of the invention provides a preparation method of a supported copper oxide catalyst, which comprises the following steps: pretreating the alumina ball under a certain condition to obtain an active alumina ball; preparing nitrate solution containing metal ions at a certain concentration according to a certain proportion; mixing the pretreated activated alumina spheres with the nitrate solution according to an isometric impregnation method, uniformly stirring and impregnating for a certain time to obtain loaded alumina spheres; after the impregnation is finished, taking out the loaded alumina balls, and drying the loaded alumina balls in a drying oven at a certain temperature for a certain time; and roasting the dried loaded alumina balls to obtain the loaded copper oxide catalyst. The copper oxide catalyst prepared by the invention has the advantages of low ignition temperature, uniform distribution of active components, high loading rate and high catalytic efficiency.
Description
Technical Field
The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a supported copper oxide catalyst.
Background
With the vigorous development of the industry, the pollution of organic waste gases is further increased in some industrial fields. In terms of targeting, goals are primarily designed around air quality improvement and main pollutant reduction, including remediation of organic waste gases.
There are several methods for treating organic waste gas, and catalytic oxidation is considered as one of the most effective methods. It has the advantages of high catalytic efficiency, low ignition temperature, recoverable heat, simple maintenance and the like. Research shows that the noble metal catalyst has the best catalytic effect in the catalytic oxidation catalyst, but the application of the noble metal catalyst in the industry is greatly limited due to the defects of high price, easy poisoning and the like.
Disclosure of Invention
The embodiment of the invention aims to provide a preparation method of a supported copper oxide catalyst, and the prepared copper oxide catalyst is low in ignition temperature, uniform in distribution of active components, high in loading rate and high in catalytic efficiency.
The preparation method of the supported copper oxide catalyst provided by the embodiment of the invention comprises the following steps:
s10: pretreating the alumina ball under a certain condition to obtain an active alumina ball;
s20: preparing nitrate solution containing metal ions at a certain concentration according to a certain proportion;
s30: mixing the pretreated activated alumina spheres with the nitrate solution according to an isometric impregnation method, uniformly stirring and impregnating for a certain time to obtain loaded alumina spheres;
s40: after the impregnation is finished, taking out the loaded alumina balls, and drying the loaded alumina balls in a drying oven at a certain temperature for a certain time;
s50: and roasting the dried loaded alumina balls to prepare the loaded copper oxide catalyst.
Furthermore, the diameter of the alumina ball is 1-4 mm.
Further, the pre-treatment comprises the following steps:
s101: soaking the alumina ball with deionized water and dilute nitric acid for 2-10min, wherein the concentration of the dilute nitric acid is 0.1-5%;
s102: the alumina ball is dried at the temperature of 90-120 ℃ to constant weight and is roasted at the temperature of 400-600 ℃ for 2-6 hours.
Further, the nitrate solution includes two kinds of nitrates, one of which is copper nitrate and the other is cobalt nitrate, nickel nitrate, cerium nitrate, zirconium nitrate, niobium nitrate, molybdenum nitrate or chromium nitrate.
Furthermore, the loading amount of copper ions in the nitrate solution is 1-20%, and the molar ratio of the copper ions to another metal ions is 5:1-1: 2.
Further, the impregnation time according to the equal-volume impregnation method is 10min-4 h.
Further, the drying temperature is 80-140 ℃, the drying time is 2-6h, and the roasting temperature is 400-600 ℃.
The invention has the beneficial effects that: the preparation method of the supported copper oxide catalyst provided by the embodiment of the invention comprises the steps of firstly pretreating an alumina ball to obtain an active alumina ball, then mixing the active alumina ball with a nitrate solution according to an isometric impregnation method, stirring and impregnating to obtain a supported alumina ball, and then drying and roasting to obtain the supported copper oxide catalyst. The prepared copper oxide catalyst has low ignition temperature, uniform distribution of active components, high loading rate and high catalytic efficiency.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.
The terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example 1
The embodiment of the invention provides a preparation method of a supported copper oxide catalyst, which is used for the catalytic oxidation of toluene in VOC (Volatile Organic Compounds) waste gas treatment, and the preparation method mainly comprises the following steps:
step S10: pretreating the alumina balls to obtain active alumina balls; wherein the diameter of the alumina ball is 1-4 mm.
The pretreatment specifically comprises: dipping the alumina ball for 2-10min by using 1% dilute nitric acid and deionized water; drying at 120 deg.C, and calcining at 600 deg.C for 2 hr.
Step S20: preparing a salt solution containing copper nitrate and cobalt nitrate according to a molar ratio of 2:1, wherein the loading amount of the copper nitrate is 5%;
step S30: mixing the pretreated active alumina spheres with the salt solution containing copper nitrate and cobalt nitrate according to an isometric impregnation method, uniformly stirring, and impregnating for 1 hour;
step S40: after the impregnation is finished, taking out the mixture and placing the mixture in an oven to dry the mixture to constant weight at the temperature of 105 ℃ to obtain a loaded alumina ball;
step S50: and roasting the dried loaded alumina ball at 450 ℃ to prepare the loaded copper oxide catalyst.
Example 2
The preparation method of the supported copper oxide catalyst provided by the embodiment of the invention is used for the catalytic oxidation of toluene in VOC (Volatile Organic Compounds) waste gas treatment, and mainly comprises the following steps:
step S10: pretreating the alumina balls to obtain active alumina balls; wherein the diameter of the alumina ball is 1-4 mm.
The pretreatment specifically comprises the steps of dipping the alumina ball for 2-10min by using 0.5% dilute nitric acid and deionized water; drying at 150 deg.C, and calcining at 500 deg.C for 2 hr.
Step S20: preparing a solution containing copper nitrate and cerium nitrate according to a molar ratio of 1:1, wherein the loading amount of the copper nitrate is 7%;
step S30: mixing the pretreated activated alumina balls with a salt solution according to an isometric impregnation method, uniformly stirring, and impregnating for 30 min;
step S40: after the impregnation is finished, taking out the mixture and placing the mixture in an oven to dry the mixture to constant weight at the temperature of 110 ℃ to obtain a loaded alumina ball;
step S50: and roasting the dried loaded alumina ball at 500 ℃ to prepare the loaded copper oxide catalyst.
Evaluation example:
at the gas flow rate of 500ml/min and the gas space velocity of 5000h -1 The temperature of the catalytic reaction is controlled at 250 ℃. The removal rate of toluene was evaluated as the catalyst activity.
The test results are shown in the following table:
as can be seen from the above table, the copper oxide catalyst prepared by the preparation method of the supported copper oxide catalyst provided by the embodiment of the invention has a better catalytic effect.
In summary, in the preparation method of the supported copper oxide catalyst provided in the embodiment of the present invention, firstly, the alumina spheres are pretreated to obtain the active alumina spheres, then, the active alumina spheres and the nitrate solution are mixed, stirred and impregnated according to the equal volume impregnation method to obtain the supported alumina spheres, and then, the supported copper oxide catalyst is obtained by drying and roasting. The prepared copper oxide catalyst has low ignition temperature, uniform distribution of active components, high loading rate and high catalytic efficiency.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A preparation method of a supported copper oxide catalyst is characterized by comprising the following steps:
s10: pretreating the alumina ball under a certain condition to obtain an active alumina ball;
s20: preparing nitrate solution containing metal ions at a certain concentration according to a certain proportion;
s30: mixing the pretreated activated alumina spheres with the nitrate solution according to an isometric impregnation method, uniformly stirring and impregnating for a certain time to obtain loaded alumina spheres;
s40: taking out the loaded alumina balls after the impregnation is finished, and drying the loaded alumina balls in a drying oven at a certain temperature for a certain time;
s50: and roasting the dried loaded alumina balls to obtain the loaded copper oxide catalyst.
2. The method of preparing a supported copper oxide catalyst according to claim 1, wherein the diameter of the alumina spheres is 1 to 4 mm.
3. The method of preparing a supported copper oxide catalyst according to claim 1, wherein the pretreatment comprises the steps of:
s101: soaking the alumina ball with deionized water and dilute nitric acid for 2-10min, wherein the concentration of the dilute nitric acid is 0.1-5%;
s102: the alumina ball is dried at the temperature of 90-120 ℃ to constant weight and is roasted at the temperature of 400-600 ℃ for 2-6 hours.
4. The method of preparing a supported copper oxide catalyst according to claim 1, wherein the nitrate solution comprises two nitrates, one of which is copper nitrate and the other of which is cobalt nitrate, nickel nitrate, cerium nitrate, zirconium nitrate, niobium nitrate, molybdenum nitrate or chromium nitrate.
5. The method of claim 1 or 4, wherein the loading amount of copper ions in the nitrate solution is 1 to 20%, and the molar ratio of copper ions to another metal ions is 5:1 to 1: 2.
6. The method for preparing a supported copper oxide catalyst according to claim 1, wherein the impregnation time according to the equivalent-volume impregnation method is 10min to 4 h.
7. The method for preparing the supported copper oxide catalyst as claimed in claim 1, wherein the drying temperature is 80-140 ℃, the drying time is 2-6h, and the calcination temperature is 400-600 ℃.
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CN202210419107.4A CN114917906A (en) | 2022-04-21 | 2022-04-21 | Preparation method of supported copper oxide catalyst |
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CN202210419107.4A CN114917906A (en) | 2022-04-21 | 2022-04-21 | Preparation method of supported copper oxide catalyst |
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US5851948A (en) * | 1996-08-20 | 1998-12-22 | Hydrocarbon Technologies, Inc. | Supported catalyst and process for catalytic oxidation of volatile organic compounds |
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2022
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Application publication date: 20220819 |