CN114669286A - Platinum-based catalyst for CO oxidation and preparation method and application thereof - Google Patents
Platinum-based catalyst for CO oxidation and preparation method and application thereof Download PDFInfo
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 199
- 239000003054 catalyst Substances 0.000 title claims abstract description 86
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 64
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 48
- 230000003647 oxidation Effects 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 30
- 239000002131 composite material Substances 0.000 claims abstract description 52
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 42
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 42
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 42
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 42
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 42
- 230000003197 catalytic effect Effects 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000005470 impregnation Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 27
- 239000010936 titanium Substances 0.000 claims description 27
- 229910052719 titanium Inorganic materials 0.000 claims description 27
- 229910003082 TiO2-SiO2 Inorganic materials 0.000 claims description 26
- 238000001035 drying Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000000967 suction filtration Methods 0.000 claims description 18
- NWAHZABTSDUXMJ-UHFFFAOYSA-N platinum(2+);dinitrate Chemical compound [Pt+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O NWAHZABTSDUXMJ-UHFFFAOYSA-N 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- 239000010703 silicon Substances 0.000 claims description 14
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 11
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- 230000029219 regulation of pH Effects 0.000 claims description 9
- 239000011865 Pt-based catalyst Substances 0.000 claims description 6
- CLSUSRZJUQMOHH-UHFFFAOYSA-L platinum dichloride Chemical compound Cl[Pt]Cl CLSUSRZJUQMOHH-UHFFFAOYSA-L 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 238000003760 magnetic stirring Methods 0.000 claims description 2
- 238000010979 pH adjustment Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 239000003517 fume Substances 0.000 claims 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 34
- 238000006243 chemical reaction Methods 0.000 abstract description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 12
- 229910000510 noble metal Inorganic materials 0.000 abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 abstract description 12
- 239000011593 sulfur Substances 0.000 abstract description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 13
- 239000003546 flue gas Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 11
- 238000012360 testing method Methods 0.000 description 9
- 238000011068 loading method Methods 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 239000011734 sodium Substances 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 229910015189 FeOx Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005013 brain tissue Anatomy 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011278 co-treatment Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- -1 platinum group metals Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
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- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/08—Silica
-
- 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
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention provides a platinum-based catalyst for CO oxidation, and a preparation method and application thereof2‑SiO2Composite oxide of the TiO compound2‑SiO2TiO in the composite oxide2With SiO2The molar ratio of (0.1-3) to 1; the content of Pt is 0.01-0.08 wt%; by blending TiO2And SiO2The use level of the noble metal Pt is reduced, so that the content of Pt is 0.01-0.08 wt% to obtain higher CO catalytic oxidation efficiency; give full play to the carrier andsynergistic effect between active components, increased size of active components, and improved sulfur resistance due to TiO in the carrier2The existence of the catalyst enables the platinum-based catalyst to have better catalytic effect under the condition of water content, and the complete conversion temperature of CO is obviously reduced; in the preparation method, TiO is prepared by a co-hydrolysis method2‑SiO2The composite oxide carrier is loaded with the active component Pt on the carrier through an impregnation method, and the preparation method is simple and easy to operate and has good repeatability.
Description
Technical Field
The invention belongs to the field of environmental catalysis, relates to the technical field of CO purification, and particularly relates to a platinum-based catalyst for CO oxidation and a preparation method and application thereof.
Background
CO has strong toxicity, can harm human viscera and brain tissues at higher concentration, can form explosive mixture when being mixed with air at certain concentration, and finally can be converted into CO through the reaction with hydroxyl compounds in the atmosphere2。
The current relevant research shows that the CO content in the smoke of the thermal power plant including the supercritical opposed firing boiler and the biomass solid firing boiler is 500-2500mg/m3. Meanwhile, with the continuous tightening of the national policy of environmental protection and the strict control of the national carbon emission, the removal of CO in the flue gas is absolutely necessary as the removal of NO.
CO is used as a product of incomplete combustion of carbonaceous substances such as coal, petroleum and the like or hydrocarbon substances and is also one of greenhouse gases, and excessive emission not only brings serious threat to human health, but also brings great harm to the ecological environment. The catalytic oxidation technology in the CO treatment is the most extensive, economic and effective method in the CO harmless treatment. The CO catalytic oxidation reaction is CO and O2Bimolecular reaction on the surface of the catalyst is an important reaction in many industrial processes, and can be divided into noble metal catalysts, non-noble metal catalysts, molecular sieve catalysts, alloy catalysts and the like according to different types, and the catalytic oxidation reaction mechanisms of different catalyst systems are different.
In the catalytic oxidation reaction of CO, the noble metal in the noble metal catalyst mainly comprises gold, silver and platinum group metals (platinum, rhodium, palladium and iridium), and the noble metal catalyst is high in price. The catalyst has good catalytic activity, low reaction temperature and less required active phase amount for noble metal catalysts such as Pt, Au, Pd and the like in CO catalytic oxidation application, and is a relatively common catalyst. The preparation method of the catalyst is different, and the dispersion of active components of the catalyst, the size and the structure of catalyst particles and the like can be influenced.
CN113042093A provides a platinum-containing catalyst for low-temperature oxidation of carbon monoxide, which is a hybrid nano-structured Pt catalyst and is marked as Pt/FeOx-Na/SBA-15 or Pt/FeOx-Na/SiO2The preparation method comprises the steps of firstly adopting a deposition precipitation method to prepare FeOxCoated or supported on SBA-15 or SiO2After solid-liquid separation, the composite carrier Pt/FeO is dipped in sodium salt and then is evaporated, dried and roasted to obtain the composite carrier Pt/FeOxNa/SBA-15 or Pt/FeOx-Na/SiO2(ii) a Under the irradiation of ultraviolet light, anchoring or loading the active component Pt nano particles on a composite carrier by using a photocatalytic reduction method, and roasting to prepare the catalyst; the catalyst obtained by the method has low Pt content, is economical and cheap; but the preparation method is complex and has high requirements on equipment. CN111185167B discloses a Pt-based catalyst for CO purification, a preparation method and application thereof, wherein the Pt-based catalyst is TiO2As carrier, Pt as main active component, CeO2As a first co-active component, WO3And/or MoO3Is a second coactive component; the first auxiliary active component and the second auxiliary active component have a synergistic effect, so that the dosage of the noble metal Pt is obviously reduced; compared with the traditional Pt-based catalyst, the Pt-based catalyst prepared by the method has the characteristics of low cost, strong universality and good stability, and has high CO catalytic oxidation efficiency, and the product can be used for CO2Has high selectivity and obviously improved sulfur resistance; but the raw materials needed are more, the preparation process is complex, and multiple times of roasting are needed.
Therefore, the development of the noble metal Pt catalyst for CO catalytic oxidation, which has good catalytic performance, high economic benefit and simple preparation process, is still of great significance.
Disclosure of Invention
The invention aims to provide a platinum-based catalyst for CO oxidation and a preparation method and application thereof, wherein the platinum-based catalyst is used for CO oxidationThe agent comprises a carrier and Pt, wherein the carrier is TiO2-SiO2Composite oxide of the TiO compound2-SiO2TiO in composite oxide2With SiO2The molar ratio of (0.1-3) to 1; the content of Pt is 0.01-0.08 wt%; by blending TiO2And SiO2The molar ratio of the Pt is reduced, the use amount of noble metal Pt is reduced, and the high CO catalytic oxidation efficiency is achieved when the Pt content is 0.01-0.08 wt%; in addition, the synergistic effect between the carrier and the active component is fully exerted, the size of the active component is increased, and the sulfur resistance is obviously improved due to the TiO in the carrier2The existence of the catalyst enables the platinum-based catalyst to have better catalytic effect under the condition of water content, and the complete conversion temperature of CO is obviously reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention aims to provide a platinum-based catalyst for CO oxidation, which comprises a carrier and Pt, wherein the carrier is TiO2-SiO2Composite oxide of the said TiO2-SiO2TiO in composite oxide2With SiO2The molar ratio of (0.1-3) to 1; the content of Pt is 0.01-0.08 wt%.
The platinum-based catalyst of the invention is made of TiO2-SiO2The composite oxide is used as a carrier, Pt is used as a main active component, and TiO is prepared2And SiO2The molar ratio of (0.1-3) to 1, the dosage of noble metal Pt is reduced, and the catalytic oxidation efficiency of CO is higher when the Pt content is 0.01-0.08 wt%; in addition, the synergistic effect between the carrier and the active component is fully exerted, and the sulfur resistance is obviously improved because of TiO in the carrier2The existence of the catalyst enables the platinum-based catalyst to have better catalytic effect under the condition of water content, and the complete conversion temperature of CO is obviously reduced.
It is worth mentioning that the TiO2-SiO2TiO in composite oxide2With SiO2The molar ratio of (0.1-3):1, for example, 0.1:1, 0.5:1, 0.8:1, 1:1, 1.2:1, 1.5:1, 1.7:1, 2:1, 2.2:1, 2.5:1, 2.8:1, 3:1, etc.; the Pt content is 0.01 to 0.08 wt%, and may be, for example, 0.01 wt%, 0.02 wt%,0.03 wt%, 0.04 wt%, 0.05 wt%, 0.06 wt%, 0.07 wt%, 0.08 wt%, etc., but is not limited to the recited values, and other values not recited in the above numerical range are also applicable.
A second object of the present invention is to provide a method for preparing a platinum-based catalyst for CO oxidation, the method comprising the steps of:
(1) adjusting the pH value of the titanium source solution, carrying out first heating, adding a silicon source, carrying out second heating and first roasting to obtain TiO2-SiO2A composite oxide support;
(2) mixing a Pt source solution with the TiO in the step (1)2-SiO2And carrying out second mixing on the composite oxide carrier, and carrying out impregnation and second roasting to obtain the platinum-based catalyst.
In the preparation method of the platinum-based catalyst, TiO is prepared by a co-hydrolysis method2-SiO2Composite oxide support on TiO by impregnation2-SiO2The composite oxide carrier loads the active component Pt, and the preparation method is simple and easy to operate and has good repeatability.
As a preferable technical scheme of the invention, in the titanium source solution in the step (1), the titanium source comprises tetrabutyl titanate.
Preferably, the titanium source solution in step (1) has a titanium source mass fraction of 80-90 wt%, such as 80 wt%, 81 wt%, 82 wt%, 83 wt%, 84 wt%, 85 wt%, 86 wt%, 87 wt%, 88 wt%, 89 wt%, 90 wt%, etc., but not limited to the recited values, and other unrecited values within the above-mentioned range of values are also applicable.
Preferably, the solvent of the titanium source solution of step (1) comprises water.
Preferably, the end point of the pH adjustment in step (1) is a pH of 1 to 6, which may be, for example, 1, 2, 3, 4, 5, 6, etc., but is not limited to the recited values, and other values not recited within the above-mentioned range of values are equally applicable.
Preferably, the pH regulator used for pH regulation in step (1) is nitric acid.
Preferably, the temperature of the first heating in step (1) is 40-60 deg.C, such as 40 deg.C, 42 deg.C, 44 deg.C, 46 deg.C, 48 deg.C, 50 deg.C, 52 deg.C, 54 deg.C, 56 deg.C, 58 deg.C, 60 deg.C, etc., but it is not limited to the values listed, and other values not listed in the above range are also applicable.
Preferably, the first heating time in step (1) is 1-10h, such as 1h, 2h, 3h, 4h, 5h, 6h, 7h, 8h, 9h, 10h, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the silicon source of step (1) comprises tetraethyl silicate.
Preferably, the molar ratio of the titanium source to the silicon source in step (1) is (0.1-3):1, and may be, for example, 0.1:1, 0.5:1, 0.8:1, 1:1, 1.2:1, 1.5:1, 1.7:1, 2:1, 2.2:1, 2.5:1, 2.8:1, 3:1, etc., but not limited to the recited values, and other values not recited in the above numerical ranges are also applicable.
In a preferred embodiment of the present invention, the second heating temperature in step (1) is 40 to 60 ℃, and may be, for example, 40 ℃, 42 ℃, 44 ℃, 46 ℃, 48 ℃, 50 ℃, 52 ℃, 54 ℃, 56 ℃, 58 ℃, 60 ℃, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
Preferably, the second heating time in step (1) is 20-30h, such as 20h, 21h, 22h, 23h, 24h, 25h, 26h, 27h, 28h, 29h, 30h, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, after the second heating in step (1) and before the first firing in step (1), a first suction filtration and a first drying are sequentially performed.
Preferably, the temperature of the first drying is 90 to 130 ℃, for example, 90 ℃, 95 ℃, 100 ℃, 105 ℃, 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃ and the like, but is not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the first drying time is 1 to 10 hours, for example, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the temperature of the first calcination in step (1) is 400-.
Preferably, the first calcination time in step (1) is 1-10h, such as 1h, 2h, 3h, 4h, 5h, 6h, 7h, 8h, 9h, 10h, etc., but not limited to the recited values, and other values not recited in the above range are also applicable.
In a preferred embodiment of the present invention, in the Pt source solution in step (2), the mass fraction of the Pt source is 5 to 10 wt%, and may be, for example, 5 wt%, 5.5 wt%, 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, 10 wt%, etc., but the Pt source solution is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
Preferably, in the Pt source solution of step (2), the Pt source comprises any one of platinum nitrate, platinum chloride or chloroplatinic acid or a combination of at least two of them.
Preferably, the Pt source in the Pt source solution of step (2) is mixed with the TiO2-SiO2The molar ratio of the composite oxide carrier is (0.00015-0.00280):1, and may be, for example, 0.00015:1, 0.00035:1, 0.00050:1, 0.00070:1, 0.00090:1, 0.00100:1, 0.00125:1, 0.00150:1, 0.00180:1, 0.00200:1, 0.00220:1, 0.00255:1, 0.00280:1, etc., but is not limited to the enumerated values, and other unrecited values within the above numerical range are also applicable.
Preferably, the mixing in step (2) is performed by magnetic stirring.
Preferably, the mixing time in step (2) is 1-2h, such as 1h, 1.1h, 1.2h, 1.3h, 1.4h, 1.5h, 1.6h, 1.7h, 1.8h, 1.9h, 2h, etc., but not limited to the recited values, and other values not recited in the above range of values are also applicable.
Preferably, the temperature of the mixing in step (2) is 10-30 ℃, and may be, for example, 10 ℃, 12 ℃, 15 ℃, 18 ℃, 20 ℃, 23 ℃, 25 ℃, 27 ℃, 30 ℃, etc., but is not limited to the recited values, and other values not recited in the above-mentioned range of values are also applicable.
In a preferred embodiment of the present invention, the impregnation temperature in step (2) is 50 to 70 ℃, for example, 50 ℃, 52 ℃, 54 ℃, 56 ℃, 58 ℃, 60 ℃, 62 ℃, 64 ℃, 66 ℃, 68 ℃, 70 ℃ and the like, but the impregnation temperature is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
It is worth mentioning that the temperature of the impregnation is 50-70 ℃, if the temperature is higher than 70 ℃, the active component can enter the pores of the carrier too deeply to block the pores; if the temperature is lower than 50 ℃, insufficient loading of the active ingredient may result.
Preferably, the impregnation time in step (2) is 1 to 10 hours, for example, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, etc., but not limited to the recited values, and other values not recited in the above-mentioned range of values are also applicable.
Preferably, after the impregnation in the step (2) and before the second roasting in the step (2), a second suction filtration and a second drying are sequentially performed.
Preferably, the temperature of the second drying is 90 to 130 ℃, for example, 90 ℃, 95 ℃, 100 ℃, 105 ℃, 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃ and the like, but is not limited to the recited values, and other values not recited in the above numerical range are also applicable.
Preferably, the second drying time is 1 to 10 hours, for example, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, etc., but not limited to the recited values, and other values not recited in the above-mentioned range of values are also applicable.
Preferably, the temperature of the second calcination in step (2) is 400-.
Preferably, the second calcination in step (2) is carried out for 1-10h, such as 1h, 2h, 3h, 4h, 5h, 6h, 7h, 8h, 9h, 10h, etc., but not limited to the recited values, and other values not recited in the above range are also applicable.
As a preferred technical scheme of the invention, the preparation method comprises the following steps:
(1) adjusting the pH value of a titanium source solution containing 80-90 wt% of a titanium source to the end point pH value of 1-6, firstly heating for 1-10h at 40-60 ℃, adding a silicon source, secondly heating for 20-30h at 40-60 ℃, then carrying out first suction filtration and first drying for 1-10h at 90-130 ℃, and then carrying out first roasting for 1-10h at 400-600 ℃ to obtain TiO2-SiO2A composite oxide support;
wherein the titanium source comprises tetrabutyl titanate; the silicon source comprises tetraethyl silicate; the pH regulator used for pH regulation is nitric acid; the molar ratio of the titanium source to the silicon source is (0.1-3) to 1;
(2) mixing 5-10 wt% of Pt source solution with the TiO in the step (1)2-SiO2Mixing the composite oxide carrier at 10-30 ℃ for 1-2h, soaking at 50-70 ℃ for 1-10h, performing second suction filtration and second drying at 90-130 ℃ for 1-10h, and then performing second roasting at 400-600 ℃ for 1-10h to obtain a platinum-based catalyst;
wherein the Pt source in the Pt source solution and the TiO2-SiO2The molar ratio of the composite oxide support is (0.00015-0.00280): 1.
The invention also aims to provide the application of the platinum-based catalyst for CO oxidation, which is one of the aims, and the Pt-based catalyst is used for the catalytic oxidation treatment of CO-containing industrial flue gas.
As a preferred embodiment of the present invention, the CO concentration in the industrial flue gas is 7000-9000ppm, for example 7000ppm, 7200ppm, 7500ppm, 7700ppm, 8000ppm, 8300ppm, 8500ppm, 8800ppm, 9000ppm, etc., but it is not limited to the values listed, and other values not listed in the above-mentioned range of values are also applicable.
Preferably, SO is contained in the industrial flue gas2The concentration of (B) is 0 to 500ppm, and may be, for example, 0ppm, 50ppm, 150ppm, 200ppm, 260ppm, 300ppm, 340ppm, 400ppm, 450ppm, 500ppm or the like, but is not limited to the exemplified values, and other values not exemplified in the above numerical range are also applicable.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the invention has the following beneficial effects:
(1) the platinum-based catalyst of the invention is TiO2-SiO2The composite oxide is a carrier, Pt is used as a main active component, the synergistic effect between the carrier and the active component is fully exerted, and the sulfur resistance of the catalyst is obviously improved;
(2) the platinum-based catalyst is prepared by blending TiO2And SiO2The proportion of the Pt catalyst is higher than that of the Pt catalyst, so that the use amount of the noble metal Pt can be obviously reduced, and the economic benefit is obvious;
(3) the platinum-based catalyst has high CO catalytic oxidation efficiency, and can reduce the complete conversion temperature of CO;
(4) the preparation method of the platinum-based catalyst is simple and easy to operate, and has good repeatability.
Drawings
FIG. 1 is a schematic diagram of the preparation of a platinum-based catalyst for CO oxidation according to the present invention.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
It is to be noted that the process for preparing a platinum-based catalyst for CO oxidation according to the present invention is shown in FIG. 1, in which the pH of a titanium source is adjusted using an acid and then, the adjusted pH is complexed with a silicon sourceTo produce TiO2-SiO2A composite oxide carrier, and loading a Pt source on TiO2-SiO2And (4) carrying the composite oxide carrier to obtain the platinum-based catalyst.
Example 1
The embodiment provides a platinum-based catalyst for CO oxidation and a preparation method thereof, wherein the platinum-based catalyst comprises a carrier and Pt, and the carrier is TiO2-SiO2Composite oxide of the said TiO2-SiO2TiO in composite oxide2With SiO2In a molar ratio of 3: 1; the content of Pt is 0.05 wt%; the preparation method comprises the following steps:
(1) adjusting the pH of a titanium source solution containing 82 wt% of tetrabutyl titanate to the end point pH of 2, firstly heating at 50 ℃ for 1h, adding tetraethyl silicate, secondly heating at 50 ℃ for 24h, then carrying out first suction filtration and first drying at 110 ℃ for 8h, and then carrying out first roasting at 500 ℃ for 4h to obtain TiO2-SiO2A composite oxide support;
wherein the pH regulator used for pH regulation is nitric acid; the molar ratio of tetrabutyl titanate to tetraethyl silicate is 3: 1;
(2) mixing a platinum nitrate solution with the mass fraction of 8 wt% with the TiO in the step (1)2-SiO2Mixing the composite oxide carrier at 20 ℃ for 1h, soaking at 60 ℃ for 2h, performing second suction filtration and second drying at 110 ℃ for 8h, and then performing second roasting at 500 ℃ for 4h to obtain a platinum-based catalyst;
wherein, the platinum nitrate and TiO in the platinum nitrate solution2-SiO2The molar ratio of the composite oxide support was 0.00077: 1.
Example 2
The embodiment provides a platinum-based catalyst for CO oxidation and a preparation method thereof, wherein the platinum-based catalyst comprises a carrier and Pt, and the carrier is TiO2-SiO2Composite oxide of the TiO compound2-SiO2TiO in composite oxide2With SiO2In a molar ratio of 1: 1; the content of Pt is 0.01 wt%; the preparation method comprises the following steps:
(1) 80 wt% of tetrabutyl titanateAdjusting the pH of the titanium source solution to the end point pH of 1, firstly heating at 60 ℃ for 2h, adding tetraethyl silicate, secondly heating at 60 ℃ for 20h, then carrying out first suction filtration and first drying at 130 ℃ for 1h, and then carrying out first roasting at 600 ℃ for 1h to obtain TiO2-SiO2A composite oxide support;
wherein the pH regulator used for pH regulation is nitric acid; the molar ratio of tetrabutyl titanate to tetraethyl silicate is 1: 1;
(2) mixing a platinum nitrate solution with the mass fraction of 10 wt% with the TiO in the step (1)2-SiO2Mixing the composite oxide carrier at 30 ℃ for 1.5h, soaking at 50 ℃ for 10h, carrying out second suction filtration and second drying at 130 ℃ for 1h, and then carrying out second roasting at 600 ℃ for 1h to obtain a platinum-based catalyst;
wherein, the platinum nitrate and TiO in the platinum nitrate solution2-SiO2The molar ratio of the composite oxide support was 0.00015: 1.
Example 3
The embodiment provides a platinum-based catalyst for CO oxidation and a preparation method thereof, wherein the platinum-based catalyst comprises a carrier and Pt, and the carrier is TiO2-SiO2Composite oxide of the TiO compound2-SiO2TiO in composite oxide2With SiO2In a molar ratio of 0.1: 1; the content of Pt is 0.08 wt%; the preparation method comprises the following steps:
(1) adjusting the pH of a titanium source solution containing 90 wt% of tetrabutyl titanate to the end point pH of 6, firstly heating at 40 ℃ for 10h, adding tetraethyl silicate, secondly heating at 40 ℃ for 30h, then carrying out first suction filtration and first drying at 90 ℃ for 10h, and then carrying out first roasting at 400 ℃ for 10h to obtain TiO2-SiO2A composite oxide support;
wherein the pH regulator used for pH regulation is nitric acid; the molar ratio of tetrabutyl titanate to tetraethyl silicate is 0.1: 1;
(2) mixing a platinum chloride solution with the mass fraction of 5 wt% with the TiO in the step (1)2-SiO2Mixing the composite oxide carrier at 10 deg.C for 2h, soaking at 70 deg.C for 1h, performing second suction filtration and second drying at 90 deg.C for 10h, and then second roasting at 400 deg.C for 10h to obtain the final productTo a platinum-based catalyst;
wherein, the platinum chloride and TiO in the platinum chloride solution2-SiO2The molar ratio of the composite oxide support was 0.00280: 1.
Example 4
The embodiment provides a platinum-based catalyst for CO oxidation and a preparation method thereof, wherein the platinum-based catalyst comprises a carrier and Pt, and the carrier is TiO2-SiO2Composite oxide of the TiO compound2-SiO2TiO in composite oxide2With SiO2In a molar ratio of 3: 1; the content of Pt is 0.05 wt%; the preparation is as described in example 1, with the only difference that: the temperature of the impregnation in the step (2) is 85 ℃.
Example 5
The embodiment provides a platinum-based catalyst for CO oxidation and a preparation method thereof, wherein the platinum-based catalyst comprises a carrier and Pt, and the carrier is TiO2-SiO2Composite oxide of the TiO compound2-SiO2TiO in composite oxide2With SiO2In a molar ratio of 3: 1; the content of Pt is 0.05 wt%; the preparation is as described in example 1, with the only difference that: the temperature of the impregnation in the step (2) is 35 ℃.
Comparative example 1
This comparative example provides a platinum-based catalyst for CO oxidation comprising a support of TiO and Pt and a method for preparing the same2The content of Pt is 0.01 wt%; the preparation method comprises the following steps:
(1) adjusting the pH of a titanium source solution containing 82 wt% of tetrabutyl titanate to the end point pH of 2, heating at 50 ℃ for 25 hours, performing first suction filtration and first drying at 110 ℃ for 8 hours, and then performing first roasting at 500 ℃ for 4 hours to obtain TiO2A carrier;
wherein the pH regulator used for pH regulation is nitric acid;
(2) mixing a platinum nitrate solution with the mass fraction of 8 wt% with the TiO in the step (1)2-SiO2The composite oxide carrier is mixed for 1h at 20 ℃, and is soaked for 2h at 60 ℃,carrying out second suction filtration and second drying at 110 ℃ for 8h, and then carrying out second roasting at 500 ℃ for 4h to obtain a platinum-based catalyst;
wherein, the platinum nitrate and TiO in the platinum nitrate solution2The molar ratio of the support was 0.00077: 1.
Comparative example 2
This comparative example provides a platinum-based catalyst for CO oxidation comprising a support of SiO and Pt, and a method for preparing the same2The content of Pt is 0.015 wt%; the preparation method comprises the following steps:
(1) adjusting the pH of a silicon source solution containing 82 wt% of tetraethyl silicate to the end point pH of 2, heating at 50 ℃ for 25 hours, carrying out first suction filtration and first drying at 110 ℃ for 8 hours, and then carrying out first roasting at 500 ℃ for 4 hours to obtain SiO2A carrier;
wherein the pH regulator used for pH regulation is nitric acid;
(2) mixing a platinum nitrate solution with the mass fraction of 8 wt% with the TiO in the step (1)2-SiO2Mixing the composite oxide carrier at 20 ℃ for 1h, soaking at 60 ℃ for 2h, performing second suction filtration and second drying at 110 ℃ for 8h, and then performing second roasting at 500 ℃ for 4h to obtain a platinum-based catalyst;
wherein, the platinum nitrate and SiO in the platinum nitrate solution2The molar ratio of the support was 0.00077: 1.
First, the platinum-based catalysts obtained in the above examples and comparative examples were tested for sulfur resistance by the following methods:
the platinum-based catalyst is subjected to catalytic test of industrial smoke, and the main stream carrier gas for simulating the industrial smoke is N2And O2，O2The content of (2) is 20%, and the simulated industrial flue gas also comprises CO and SO2(ii) a The temperature of the catalytic oxidation furnace is 300 ℃, and the simulated industrial flue gas flow is 1000Nm3Carrying out catalytic oxidation in a/h atmosphere, measuring the CO concentration at the outlet of the catalytic oxidation furnace, and obtaining the CO removal rate which is the CO concentration at the outlet/the initial CO concentration multiplied by 100% through calculation;
the industrial flue gas catalytic test was carried out three times in total: during the first test, the concentration of CO in the simulated industrial flue gas is 7200ppm and SO2The concentration is 0 ppm; during the second test, the CO concentration in the simulated industrial flue gas is 7200ppm and SO2The concentration is 50 ppm; in the third test, the CO concentration in the simulated industrial flue gas is 7200ppm and SO2The concentration was 500 ppm.
The results of the sulfur resistance test of the platinum-based catalysts obtained in the above examples and comparative examples are shown in Table 1.
Secondly, the complete CO conversion temperature of the platinum-based catalysts obtained in the above examples and comparative examples is tested by the following method:
testing the active temperature curve of the platinum-based catalyst in the industrial smoke, wherein the main stream carrier for simulating the industrial smoke is N2And O2，O2The content of (2) is 20%, and the simulated industrial flue gas also comprises CO and H2O and SO2CO concentration 7200ppm, H2O concentration 10%, SO2The concentration is 50 ppm; the temperature of the catalytic oxidation furnace is 300 ℃ for temperature programming, one temperature point is taken every 10 ℃, and the flow of the simulated industrial flue gas is 1000Nm3And (3) carrying out catalytic oxidation in a/h atmosphere, measuring the CO concentration at the outlet of the catalytic oxidation furnace, and determining the temperature when the CO concentration at the outlet is 0ppm as the complete CO conversion temperature.
The results of the CO complete conversion temperature test of the platinum-based catalysts obtained in the above examples and comparative examples are shown in Table 1.
TABLE 1
The following points can be derived from table 1:
(1) from examples 1-3, it can be seen that the platinum-based catalysts of the present invention still have good catalytic oxidation efficiency of CO at low platinum loadings (0.01-0.08 wt%); through three tests, the CO removal rate is only reduced a little, and the sulfur resistance is good; and the complete conversion temperature of CO is lower; the catalyst is suitable for catalyzing industrial flue gas, and has high economic benefit;
(2) comparing example 1 with examples 4 and 5, it can be seen that since the impregnation temperature in step (2) of example 4 is 85 ℃ which is higher than the preferred temperature of 50-70 ℃ in the present invention, the active component enters too deep into the carrier channels to block the channels, and further the CO removal rate and the sulfur resistance are reduced; since the impregnation temperature in step (2) of example 5 is 35 ℃ which is lower than the preferable temperature of 50-70 ℃ in the present invention, insufficient Pt loading of the active component is caused, and thus the CO removal rate and the sulfur resistance are reduced;
(3) comparing example 1 with comparative examples 1 and 2, it can be seen that the support in comparative example 1 is TiO2The loading amount of Pt is reduced, the CO removal rate is reduced, the sulfur resistance is reduced, and the complete conversion temperature of CO is high; comparative example 2 where the support was SiO2This results in a decrease in the amount of Pt loaded, and thus in a decrease in CO removal rate, a decrease in sulfur resistance, and a high CO complete conversion temperature.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A platinum-based catalyst for CO oxidation, characterized in that the platinum-based catalyst comprises a carrier and Pt, the carrier is TiO2-SiO2Composite oxide of the TiO compound2-SiO2TiO in the composite oxide2With SiO2The molar ratio of (0.1-3) to (1); the content of Pt is 0.01-0.08 wt%.
2. A method for preparing a platinum-based catalyst for CO oxidation according to claim 1, comprising the steps of:
(1) adjusting the pH value of the titanium source solution, carrying out first heating, adding a silicon source, carrying out second heating and first roasting to obtain TiO2-SiO2A composite oxide support;
(2) mixing a Pt source solution with the TiO in the step (1)2-SiO2Mixing the composite oxide carrier, impregnating, and performing a second stepAnd (4) roasting to obtain the platinum-based catalyst.
3. The method of preparing a platinum-based catalyst for CO oxidation according to claim 2, wherein in the titanium source solution of step (1), the titanium source comprises tetrabutyl titanate;
preferably, in the titanium source solution in the step (1), the mass fraction of the titanium source is 80-90 wt%;
preferably, the solvent of the titanium source solution of step (1) comprises water;
preferably, the end point pH of the pH adjustment of step (1) is 1-6;
preferably, the pH regulator used for pH regulation in step (1) is nitric acid.
4. The method for preparing a platinum-based catalyst for CO oxidation according to claim 2 or 3, wherein the first heating temperature of step (1) is 40 to 60 ℃;
preferably, the first heating time in the step (1) is 1-10 h;
preferably, the silicon source of step (1) comprises tetraethyl silicate;
preferably, the molar ratio of the titanium source to the silicon source is (0.1-3): 1.
5. The method for preparing a platinum-based catalyst for CO oxidation according to any one of claims 2 to 4, wherein the temperature of the second heating of step (1) is 40 to 60 ℃;
preferably, the second heating time in the step (1) is 20-30 h;
preferably, after the second heating in the step (1) and before the first roasting in the step (1), sequentially performing first suction filtration and first drying;
preferably, the temperature of the first drying is 90-130 ℃;
preferably, the first drying time is 1-10 h;
preferably, the temperature of the first roasting in the step (1) is 400-600 ℃;
preferably, the time of the first roasting in the step (1) is 1-10 h.
6. The method for preparing a platinum-based catalyst for CO oxidation according to any one of claims 2 to 5, wherein the mass fraction of the Pt source in the Pt source solution of step (2) is 5 to 10 wt%;
preferably, in the Pt source solution in the step (2), the Pt source comprises any one of platinum nitrate, platinum chloride or chloroplatinic acid or a combination of at least two of the platinum nitrate, the platinum chloride and the chloroplatinic acid;
preferably, the Pt source in the Pt source solution of step (2) is mixed with the TiO2-SiO2The molar ratio of the composite oxide carrier is (0.00015-0.00280) 1;
preferably, the mixing in the step (2) is performed by magnetic stirring;
preferably, the mixing time of the step (2) is 1-2 h;
preferably, the temperature of the mixing in the step (2) is 10-30 ℃.
7. The method for preparing a platinum-based catalyst for CO oxidation according to any one of claims 2 to 6, wherein the temperature of the impregnation in the step (2) is 50 to 70 ℃;
preferably, the impregnation time of step (2) is 1-10 h.
8. The method for preparing a platinum-based catalyst for CO oxidation according to any one of claims 2 to 7, wherein after the impregnation in the step (2) and before the second calcination in the step (2), a second suction filtration and a second drying are sequentially performed;
preferably, the temperature of the secondary drying is 90-130 ℃;
preferably, the time of the second drying is 1-10 h;
preferably, the temperature of the second roasting in the step (2) is 400-600 ℃;
preferably, the time of the second roasting in the step (2) is 1-10 h.
9. The method for preparing a platinum-based catalyst for CO oxidation according to any one of claims 2 to 8, characterized in that it comprises the steps of:
(1) adjusting the pH value of a titanium source solution containing 80-90 wt% of a titanium source to the end point pH value of 1-6, firstly heating for 1-10h at 40-60 ℃, adding a silicon source, secondly heating for 20-30h at 40-60 ℃, then carrying out first suction filtration and first drying for 1-10h at 90-130 ℃, and then carrying out first roasting for 1-10h at 400-600 ℃ to obtain TiO2-SiO2A composite oxide support;
wherein the titanium source comprises tetrabutyl titanate; the silicon source comprises tetraethyl silicate; the pH regulator used for pH regulation is nitric acid; the molar ratio of the titanium source to the silicon source is (0.1-3) to 1;
(2) mixing 5-10 wt% of Pt source solution with the TiO in the step (1)2-SiO2Mixing the composite oxide carrier at 10-30 ℃ for 1-2h, soaking at 50-70 ℃ for 1-10h, performing second suction filtration and second drying at 90-130 ℃ for 1-10h, and then performing second roasting at 400-600 ℃ for 1-10h to obtain a platinum-based catalyst;
wherein the Pt source in the Pt source solution and the TiO2-SiO2The molar ratio of the composite oxide support is (0.00015-0.00280): 1.
10. Use of a platinum-based catalyst for the oxidation of CO according to claim 1, characterized in that the Pt-based catalyst is used in the catalytic oxidation treatment of industrial fumes containing CO.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116251586A (en) * | 2023-02-24 | 2023-06-13 | 浙江大学 | Sulfur-resistant CO oxidation catalyst, preparation method and application |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1782032A (en) * | 2004-12-01 | 2006-06-07 | 中国石油天然气股份有限公司 | By TiO2－SiO2Preparation method of diesel oil hydrofining catalyst with composite oxide as carrier |
| CN101559376A (en) * | 2009-05-26 | 2009-10-21 | 清华大学 | Catalyst for sulfuric acid catalytic decomposition and preparation method thereof |
| CN102101048A (en) * | 2011-01-25 | 2011-06-22 | 清华大学 | Cerium-based denitration catalyst with titanium-silicon compound oxide as carrier and preparation and application thereof |
| CN103861574A (en) * | 2014-02-28 | 2014-06-18 | 中国海洋石油总公司 | Method for preparing titanium-silicon composite oxide |
| JP2018030064A (en) * | 2016-08-23 | 2018-03-01 | 株式会社豊田中央研究所 | CO oxidation catalyst and CO oxidation method using the same |
| CN109603798A (en) * | 2018-12-18 | 2019-04-12 | 重庆工商大学 | A kind of meso-porous titanium oxide-oxidation silicon oxide composite material and its preparation method and application |
| CN109608913A (en) * | 2018-10-30 | 2019-04-12 | 中科院广州化学有限公司南雄材料生产基地 | A kind of Pt-TiO2-SiO2Photocatalytic self-cleaning composite material and preparation method |
| CN110721680A (en) * | 2019-10-23 | 2020-01-24 | 中国科学院生态环境研究中心 | Catalyst for simultaneously catalyzing and oxidizing formaldehyde and CO, and preparation method and application thereof |
| CN110961090A (en) * | 2018-09-28 | 2020-04-07 | 中国石油化工股份有限公司 | Titanium-silicon composite oxide, preparation method and application thereof |
| CN113042044A (en) * | 2021-04-02 | 2021-06-29 | 福州大学 | TiO doped with ZnO2-SiO2Preparation and application of platinum catalyst as carrier |
-
2022
- 2022-03-29 CN CN202210319520.3A patent/CN114669286A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1782032A (en) * | 2004-12-01 | 2006-06-07 | 中国石油天然气股份有限公司 | By TiO2－SiO2Preparation method of diesel oil hydrofining catalyst with composite oxide as carrier |
| CN101559376A (en) * | 2009-05-26 | 2009-10-21 | 清华大学 | Catalyst for sulfuric acid catalytic decomposition and preparation method thereof |
| CN102101048A (en) * | 2011-01-25 | 2011-06-22 | 清华大学 | Cerium-based denitration catalyst with titanium-silicon compound oxide as carrier and preparation and application thereof |
| CN103861574A (en) * | 2014-02-28 | 2014-06-18 | 中国海洋石油总公司 | Method for preparing titanium-silicon composite oxide |
| JP2018030064A (en) * | 2016-08-23 | 2018-03-01 | 株式会社豊田中央研究所 | CO oxidation catalyst and CO oxidation method using the same |
| CN110961090A (en) * | 2018-09-28 | 2020-04-07 | 中国石油化工股份有限公司 | Titanium-silicon composite oxide, preparation method and application thereof |
| CN109608913A (en) * | 2018-10-30 | 2019-04-12 | 中科院广州化学有限公司南雄材料生产基地 | A kind of Pt-TiO2-SiO2Photocatalytic self-cleaning composite material and preparation method |
| CN109603798A (en) * | 2018-12-18 | 2019-04-12 | 重庆工商大学 | A kind of meso-porous titanium oxide-oxidation silicon oxide composite material and its preparation method and application |
| CN110721680A (en) * | 2019-10-23 | 2020-01-24 | 中国科学院生态环境研究中心 | Catalyst for simultaneously catalyzing and oxidizing formaldehyde and CO, and preparation method and application thereof |
| CN113042044A (en) * | 2021-04-02 | 2021-06-29 | 福州大学 | TiO doped with ZnO2-SiO2Preparation and application of platinum catalyst as carrier |
Non-Patent Citations (1)
| Title |
|---|
| MI-YOUNG KIM ET AL.: "Coating SiO2 Support with TiO2 or ZrO2 and Effects on Structure and CO Oxidation Performance of Pt Catalysts", 《CATALYSTS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116251586A (en) * | 2023-02-24 | 2023-06-13 | 浙江大学 | Sulfur-resistant CO oxidation catalyst, preparation method and application |
| CN116251586B (en) * | 2023-02-24 | 2024-07-09 | 浙江大学 | Sulfur-resistant CO oxidation catalyst, preparation method and application |
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Application publication date: 20220628 |