CN114602503A - Spherical particle VOCs catalyst and preparation method thereof - Google Patents
Spherical particle VOCs catalyst and preparation method thereof Download PDFInfo
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- CN114602503A CN114602503A CN202210308052.XA CN202210308052A CN114602503A CN 114602503 A CN114602503 A CN 114602503A CN 202210308052 A CN202210308052 A CN 202210308052A CN 114602503 A CN114602503 A CN 114602503A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 60
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 39
- 239000012798 spherical particle Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 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 42
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 37
- 150000004706 metal oxides Chemical group 0.000 claims abstract description 37
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 36
- 239000011230 binding agent Substances 0.000 claims abstract description 23
- 150000003839 salts Chemical class 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000005469 granulation Methods 0.000 claims abstract description 8
- 230000003179 granulation Effects 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 13
- 238000002791 soaking Methods 0.000 claims description 13
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 12
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 8
- 239000005751 Copper oxide Substances 0.000 claims description 8
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 8
- 229910000431 copper oxide Inorganic materials 0.000 claims description 8
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 8
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000012266 salt solution Substances 0.000 claims description 8
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 5
- 238000012840 feeding operation Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims 2
- 239000010410 layer Substances 0.000 abstract description 14
- 239000002344 surface layer Substances 0.000 abstract description 14
- 230000003197 catalytic effect Effects 0.000 abstract description 9
- 238000005096 rolling process Methods 0.000 abstract description 7
- 239000010970 precious metal Substances 0.000 abstract description 5
- 238000005470 impregnation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 7
- 238000005338 heat storage Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910003455 mixed metal oxide Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- XHEBPBQQBWIDMJ-UHFFFAOYSA-N C(C)(=O)OCC.C=CC1=CC=CC=C1 Chemical compound C(C)(=O)OCC.C=CC1=CC=CC=C1 XHEBPBQQBWIDMJ-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000008096 xylene Substances 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
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/894—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
-
- 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
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B01J35/51—
Abstract
The embodiment of the invention provides a spherical particle VOCs catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation. The spherical particle VOCs catalyst comprises an inner core, an intermediate layer and a surface layer, wherein the inner core is an alumina sphere, the intermediate layer is a metal oxide, and the surface layer is a precious metal component, and the spherical particle VOCs catalyst comprises the following raw material components: 30 to 40 percent of alumina ball, 20 to 40 percent of metal oxide, 0.1 to 0.5 percent of noble metal salt and 1 to 4 percent of binder. The preparation method comprises the steps of granulation, impregnation and the like. According to the invention, the non-noble metal and the noble metal are distributed at the periphery in a rolling ball manner, so that the contact area is increased, and the catalytic efficiency can be effectively improved.
Description
Technical Field
The invention relates to the technical field of catalysts, and particularly relates to a spherical particle VOCs catalyst and a preparation method thereof.
Background
The catalytic combustion method is a technology for purifying VOCs (Volatile organic compounds), and has the advantages of high treatment efficiency, low combustion temperature and wide application range. The principle is that the VOCs catalyst reduces the activation energy of the organic waste gas, the organic waste gas can be fully decomposed into carbon dioxide and water at a lower temperature, and the pollution of the waste gas to the environment is reduced.
At present, most VOCs catalysts on the market are honeycomb ceramic carriers coated with metal salts or impregnated with metal salt solutions, and have the defects of complex preparation process, high raw material cost, low catalytic efficiency and the like.
Disclosure of Invention
The embodiment of the invention aims to provide a spherical particle VOCs catalyst and a preparation method thereof, aiming at distributing non-noble metal and noble metal components at the periphery in a rolling ball mode, so that the contact area is increased, and the catalytic efficiency can be effectively improved.
In a first aspect, the spherical particle VOCs catalyst provided by the embodiment of the present invention includes an inner core, an intermediate layer, and a surface layer, where the inner core is an alumina sphere, the intermediate layer is a metal oxide, and the surface layer is a noble metal component, and the spherical particle VOCs catalyst includes the following raw material components: 30 to 40 percent of alumina ball, 20 to 40 percent of metal oxide, 0.1 to 0.5 percent of noble metal salt and 1 to 4 percent of binder.
Further, the binder is nano alumina sol, and the solid content of the nano alumina sol is 30%.
Further, the particle size of the alumina spheres is 1.5-5 mm.
Further, the metal oxide is a mixture of copper oxide, cerium oxide, zirconium oxide and cobalt oxide, and the mass ratio of the metal oxide to the cobalt oxide is (2-5): (2.5-3.5): (1-2): (0.5-2).
Furthermore, the mesh number of the metal oxide is 800-1000 meshes.
Further, the noble metal salt is a mixture of chloroplatinic acid and chloroauric acid, and the mass ratio of the chloroplatinic acid to the chloroauric acid is (7-10) to (0.5-3).
In a second aspect, the embodiment of the present invention provides a method for preparing a spherical particle VOCs catalyst, which is used for preparing the above spherical particle VOCs catalyst, and the method includes the following steps:
and (3) granulation: mixing a binder and water in advance, fully and uniformly stirring to form a mixed liquid, adding alumina balls into a disc granulator, spraying a proper amount of the binder and water, fully soaking, adding metal oxide powder to attach the metal oxide powder to the surfaces of the alumina balls, continuously repeating the liquid spraying and feeding operations until the feeding is finished, naturally airing after balling, and drying for 24 hours at 100 ℃;
dipping: mixing noble metal salt with water to prepare salt solution, pouring the salt solution into the dried spheres, soaking for 24 hours, filtering out excessive solution after adsorption balance, naturally drying, and roasting for 5 hours at 300 ℃.
The invention has the beneficial effects that:
the spherical particle VOCs catalyst provided by the embodiment of the invention comprises an inner core, an intermediate layer and a surface layer, wherein the inner core is an alumina sphere, the intermediate layer is a metal oxide, and the surface layer is a precious metal component, and the spherical particle VOCs catalyst comprises the following raw material components: 30 to 40 percent of alumina ball, 20 to 40 percent of metal oxide, 0.1 to 0.5 percent of noble metal salt and 1 to 4 percent of binder. The preparation method comprises the steps of granulation, impregnation and the like, and non-noble metal and noble metal components are distributed on the periphery in a rolling ball mode, so that the contact area of the catalyst is increased, and the catalytic efficiency can be effectively improved. In addition, the inner core is arranged to be an alumina sphere, the particle size of the catalyst is controllable, and the catalyst has a certain heat storage effect, so that the heat loss is reduced.
In order to make the aforementioned and other objects, features and advantages of the invention more 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 apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. 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.
Example 1
The preparation method of the spherical particle VOCs catalyst provided by the embodiment of the invention can comprise the following steps:
and (3) granulation: mixing 2 parts of binder and 10 parts of water in advance, and fully stirring to obtain mixed liquid; uniformly mixing 12 parts of copper oxide, 9 parts of cerium oxide, 6 parts of zirconium oxide and 3 parts of cobalt oxide; adding 40 parts of 3mm alumina balls into a disc granulator, spraying a proper amount of binder and water, adding the mixed metal oxide powder after fully soaking, enabling the metal oxide powder to be attached to the surface of the alumina balls, and continuously repeating the liquid spraying and feeding operations until the feeding is finished; after balling, the ball is naturally dried and dried for 24 hours at 100 ℃.
Dipping: mixing 0.17 part of chloroplatinic acid, 0.03 part of chloroauric acid and 10 parts of water to prepare a salt solution; pouring the dried spheres, soaking for 24 hours, filtering out the excess solution after adsorption is balanced, and repeatedly soaking until the solution is used up; naturally drying, and roasting at 300 deg.C for 5 hr.
According to the catalyst, the non-noble metal and the noble metal are distributed on the periphery in a rolling ball mode, so that the contact area of the catalyst is increased, and the catalytic efficiency can be effectively improved.
The spherical particle VOCs catalyst provided by the embodiment of the invention comprises an inner core, an intermediate layer and a surface layer, wherein the inner core is an alumina sphere, the intermediate layer is a metal oxide, and the surface layer is a precious metal component, and the spherical particle VOCs catalyst comprises the following raw material components: 30 to 40 percent of alumina ball, 20 to 40 percent of metal oxide, 0.1 to 0.5 percent of noble metal salt and 1 to 4 percent of binder. The inner core is arranged into an alumina sphere, the particle size of the catalyst is controllable, and the catalyst has a certain heat storage effect, so that the heat loss is reduced.
Preferably, the binder is a nano alumina sol with a solid content of 30%. The particle size of the alumina sphere is 1.5-5 mm. The metal oxide is a mixture of copper oxide, cerium oxide, zirconium oxide and cobalt oxide, and the mass ratio of the metal oxide to the cobalt oxide is (2-5): (2.5-3.5): (1-2): (0.5-2). The mesh number of the metal oxide is 800-1000 meshes. The noble metal salt is a mixture of chloroplatinic acid and chloroauric acid, and the mass ratio of the noble metal salt to the chloroplatinic acid is (7-10) to (0.5-3).
Example 2
The preparation method of the spherical particle VOCs catalyst provided by the embodiment of the invention can comprise the following steps:
and (3) granulation: mixing 2 parts of binder and 10 parts of water in advance, and fully stirring to obtain mixed liquid; uniformly mixing 15 parts of copper oxide, 9 parts of cerium oxide, 3 parts of zirconium oxide and 3 parts of cobalt oxide; adding 40 parts of 3mm alumina balls into a disc granulator, spraying a proper amount of binder and water, adding the mixed metal oxide powder after fully soaking, enabling the metal oxide powder to be attached to the surface of the alumina balls, and continuously repeating the liquid spraying and feeding operations until the feeding is finished; after balling, the ball is naturally dried and dried for 24 hours at 100 ℃.
Dipping: mixing 0.085 part of chloroplatinic acid, 0.015 part of chloroauric acid and 10 parts of water to prepare a salt solution; pouring the dried spheres, soaking for 24 hours, filtering out the excess solution after adsorption is balanced, and repeatedly soaking until the solution is used up; naturally drying, and roasting at 300 deg.C for 5 hr.
According to the catalyst, the non-noble metal and the noble metal are distributed at the periphery in a rolling ball mode, so that the contact area of the catalyst is increased, and the catalytic efficiency can be effectively improved.
The spherical particle VOCs catalyst provided by the embodiment of the invention comprises an inner core, an intermediate layer and a surface layer, wherein the inner core is an alumina sphere, the intermediate layer is a metal oxide, and the surface layer is a precious metal component, and the spherical particle VOCs catalyst comprises the following raw material components: 30 to 40 percent of alumina ball, 20 to 40 percent of metal oxide, 0.1 to 0.5 percent of noble metal salt and 1 to 4 percent of binder. The inner core is arranged into an alumina sphere, the particle size of the catalyst is controllable, and the catalyst has a certain heat storage effect, so that the heat loss is reduced.
Preferably, the binder is a nano alumina sol with a solid content of 30%. The particle size of the alumina sphere is 1.5-5 mm. The metal oxide is a mixture of copper oxide, cerium oxide, zirconium oxide and cobalt oxide, and the mass ratio of the metal oxide to the cobalt oxide is (2-5): (2.5-3.5): (1-2): (0.5-2). The mesh number of the metal oxide is 800-1000 meshes. The noble metal salt is a mixture of chloroplatinic acid and chloroauric acid, and the mass ratio of the noble metal salt to the chloroplatinic acid is (7-10) to (0.5-3).
Example 3
The preparation method of the spherical particle VOCs catalyst provided by the embodiment of the invention can comprise the following steps:
and (3) granulation: mixing 2 parts of binder and 10 parts of water in advance, and fully stirring to obtain mixed liquid; uniformly mixing 12 parts of copper oxide, 9 parts of cerium oxide, 6 parts of zirconium oxide and 3 parts of cobalt oxide; adding 40 parts of 3mm alumina balls into a disc granulator, spraying a proper amount of binder and water, adding the mixed metal oxide powder after fully soaking, enabling the metal oxide powder to be attached to the surface of the alumina balls, and continuously repeating the liquid spraying and feeding operations until the feeding is finished; after balling, the ball is naturally dried and dried for 24 hours at 100 ℃.
Dipping: mixing 0.085 part of chloroplatinic acid, 0.015 part of chloroauric acid and 10 parts of water to prepare a salt solution; pouring the dried spheres, soaking for 24 hours, filtering out the excess solution after adsorption is balanced, and repeatedly soaking until the solution is used up; naturally drying, and roasting at 300 deg.C for 5 hr.
According to the catalyst, the non-noble metal and the noble metal are distributed on the periphery in a rolling ball mode, so that the contact area of the catalyst is increased, and the catalytic efficiency can be effectively improved.
The spherical particle VOCs catalyst provided by the embodiment of the invention comprises an inner core, an intermediate layer and a surface layer, wherein the inner core is an alumina sphere, the intermediate layer is a metal oxide, and the surface layer is a precious metal component, and the spherical particle VOCs catalyst comprises the following raw material components: 30 to 40 percent of alumina ball, 20 to 40 percent of metal oxide, 0.1 to 0.5 percent of noble metal salt and 1 to 4 percent of binder. The inner core is arranged into an alumina sphere, the particle size of the catalyst is controllable, and the catalyst has a certain heat storage effect, so that the heat loss is reduced.
Preferably, the binder is a nano alumina sol with a solid content of 30%. The particle size of the alumina sphere is 1.5-5 mm. The metal oxide is a mixture of copper oxide, cerium oxide, zirconium oxide and cobalt oxide, and the mass ratio of the metal oxide to the cobalt oxide is (2-5): (2.5-3.5): (1-2): (0.5-2). The mesh number of the metal oxide is 800-1000 meshes. The noble metal salt is a mixture of chloroplatinic acid and chloroauric acid, and the mass ratio of the noble metal salt to the chloroplatinic acid is (7-10) to (0.5-3).
Comparative example
The preparation method was the same as in examples 1 to 3, except that the noble metal salt was not impregnated, the pellets were air-dried after balling, and baked at 300 ℃ for 5 hours.
The catalysts prepared in the above examples and comparative examples were subjected to activity test.
The composition of the mixed simulated gas of various VOCs in the simulated industrial catalytic combustion experiment is shown in Table 1. The test conditions were as follows: catalyst loading, thickness of 100mm and space velocity of 10000h-1And carrying out dry gas inlet concentration 2000 mg/m.
TABLE 1
| Composition (I) | Benzene and its derivatives | Xylene | Ethyl acetate | Styrene (meth) acrylic acid ester | N-hexane |
| Mass fraction | 20% | 20% | 20% | 20% | 20% |
The results of the activity tests carried out on the catalysts are shown in Table 2.
TABLE 2
| Catalyst and process for preparing same | T10 (reaction temperature 10% conversion of VOCs) | T98 (reaction temperature 98% conversion of VOCs) |
| Example 1 | 159℃ | 261℃ |
| Example 2 | 177℃ | 293℃ |
| Example 3 | 170℃ | 275℃ |
| Comparative example | 190℃ | 317℃ |
As can be seen from the above table, the spherical particle VOCs catalysts prepared in the examples of the present invention have good catalytic activity.
In summary, in the spherical particle VOCs catalyst and the preparation method thereof provided by the embodiments of the present invention, the spherical particle VOCs catalyst includes an inner core, an intermediate layer and a surface layer, the inner core is an alumina sphere, the intermediate layer is a metal oxide, and the surface layer is a noble metal component, and the spherical particle VOCs catalyst includes the following raw material components: 30 to 40 percent of alumina ball, 20 to 40 percent of metal oxide, 0.1 to 0.5 percent of noble metal salt and 1 to 4 percent of binder. The preparation method comprises the steps of granulation, impregnation and the like, and non-noble metal and noble metal components are distributed on the periphery in a rolling ball mode, so that the contact area of the catalyst is increased, and the catalytic efficiency can be effectively improved. In addition, the inner core is arranged to be an alumina sphere, the particle size of the catalyst is controllable, and the catalyst has a certain heat storage effect, so that the heat loss is reduced.
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. The utility model provides a spherical granule VOCs catalyst which characterized in that, includes kernel, intermediate level and top layer, the kernel is the alumina spheroid, the intermediate level is metal oxide, the top layer is noble metal component, spherical granule VOCs catalyst contains following raw materials component: 30 to 40 percent of alumina ball, 20 to 40 percent of metal oxide, 0.1 to 0.5 percent of noble metal salt and 1 to 4 percent of binder.
2. The spherical particle VOCs catalyst of claim 1, wherein the binder is a nano alumina sol having a solids content of 30%.
3. The catalyst of claim 1, wherein the alumina spheres have a particle size of 1.5-5 mm.
4. The catalyst of claim 1, wherein the metal oxide is a mixture of copper oxide, cerium oxide, zirconium oxide and cobalt oxide at a mass ratio of (2-5): (2.5-3.5): (1-2): (0.5-2).
5. The spherical particle VOCs catalyst as claimed in claim 4, wherein the mesh number of the metal oxide is 800-1000 mesh.
6. The spherical particle VOCs catalyst of claim 1, wherein the noble metal salt is a mixture of chloroplatinic acid and chloroauric acid in a mass ratio of (7-10) to (0.5-3).
7. A method for preparing a spherical particle VOCs catalyst according to any one of claims 1-6, comprising the steps of:
and (3) granulation: mixing a binder and water in advance, fully and uniformly stirring to form a mixed liquid, adding alumina balls into a disc granulator, spraying a proper amount of the binder and water, fully soaking, adding metal oxide powder to attach the metal oxide powder to the surfaces of the alumina balls, continuously repeating the liquid spraying and feeding operations until the feeding is finished, naturally airing after balling, and drying for 24 hours at 100 ℃;
dipping: mixing noble metal salt with water to prepare salt solution, pouring the salt solution into the dried spheres, soaking for 24 hours, filtering out excessive solution after adsorption balance, naturally drying, and roasting for 5 hours at 300 ℃.
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| CN107876050A (en) * | 2017-11-10 | 2018-04-06 | 杭州尹力环保科技有限公司 | A kind of catalyst for purifying organic waste gas and preparation method thereof |
| CN109046345A (en) * | 2018-08-01 | 2018-12-21 | 中国科学院城市环境研究所 | A kind of loaded catalyst and its preparation method and application |
| CN111939904A (en) * | 2020-08-12 | 2020-11-17 | 无锡威孚环保催化剂有限公司 | Catalytic material and catalyst for treating benzene substances in industrial waste gas and preparation method |
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