CN106391009A - Preparation method and application of catalyst for catalytic oxidation of VOCs - Google Patents
Preparation method and application of catalyst for catalytic oxidation of VOCs Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 50
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 34
- 230000003647 oxidation Effects 0.000 title claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 20
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 36
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 9
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000009467 reduction Effects 0.000 claims abstract description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 26
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 229910052697 platinum Inorganic materials 0.000 claims description 11
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000005416 organic matter Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000006555 catalytic reaction Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 5
- 230000008025 crystallization Effects 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000010970 precious metal Substances 0.000 claims description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N anhydrous n-heptane Natural products CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000003643 water by type Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 16
- 229910000510 noble metal Inorganic materials 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
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- 238000005470 impregnation Methods 0.000 abstract 2
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- 230000008020 evaporation Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 8
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- 238000012545 processing Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- HDEPFLVKWKPGFZ-UHFFFAOYSA-N Cl(=O)(=O)O.[Pt] Chemical compound Cl(=O)(=O)O.[Pt] HDEPFLVKWKPGFZ-UHFFFAOYSA-N 0.000 description 3
- 238000007084 catalytic combustion reaction Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013528 metallic particle Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
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- 208000018522 Gastrointestinal disease Diseases 0.000 description 1
- 206010019851 Hepatotoxicity Diseases 0.000 description 1
- 241000264877 Hippospongia communis Species 0.000 description 1
- 229910018663 Mn O Inorganic materials 0.000 description 1
- 229910003176 Mn-O Inorganic materials 0.000 description 1
- 206010029350 Neurotoxicity Diseases 0.000 description 1
- 206010044221 Toxic encephalopathy Diseases 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
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- 150000001298 alcohols Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
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- 239000000470 constituent Substances 0.000 description 1
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- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
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- 150000005826 halohydrocarbons Chemical class 0.000 description 1
- 208000014951 hematologic disease Diseases 0.000 description 1
- 208000018706 hematopoietic system disease Diseases 0.000 description 1
- 231100000304 hepatotoxicity Toxicity 0.000 description 1
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- 210000000987 immune system Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 239000003863 metallic catalyst Substances 0.000 description 1
- 238000000593 microemulsion method Methods 0.000 description 1
- 231100000417 nephrotoxicity Toxicity 0.000 description 1
- 231100000228 neurotoxicity Toxicity 0.000 description 1
- 230000007135 neurotoxicity Effects 0.000 description 1
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- 238000010899 nucleation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
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- 231100000572 poisoning Toxicity 0.000 description 1
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- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
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- 239000005437 stratosphere Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 239000010457 zeolite 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals 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
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/396—Distribution of the active metal ingredient
- B01J35/399—Distribution of the active metal ingredient homogeneously throughout the support particle
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
-
- 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
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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)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a preparation method of a catalyst for catalytic oxidation of VOCs (volatile organic compounds). The method includes: dissolving a salt of noble metal Pt in water to prepare a chloroplatinic acid solution; taking washed and dried powdery TiO2 as the carrier; adopting CeO2 and citric acid as the assistants, taking a proper amount of the assistants and TiO2 into a beaker, adding the chloroplatinic acid solution dropwise, and conducting vigorous stirring simultaneously, adjusting the rotor speed of a stirrer to mix the substances evenly, and conducting impregnation overnight; at the end of impregnation, performing constant temperature water bath evaporation to dryness, conducting drying in an oven to obtain a precursor of the catalyst for oxidation of VOCs; putting the precursor in a muffle furnace, and performing roasting at 500DEG C in an air atmosphere for 5h; and then placing the precursor in a 300DEG C tube furnace under an H2 atmosphere, and conducting reduction for 3h, thus obtaining the catalyst for catalytic oxidation of VOCs. The catalyst prepared by the method provided by the invention ahs the advantages of high selectivity, high activity, high stability, low ignition temperature, and long service life, etc., thus having good application value and prospect.
Description
Technical field
The present invention relates to a kind of preparation method and application of the catalyst for VOCs catalyzed conversion, belong to catalyst and
Its preparing technical field.
Background technology
Volatile organic matter (Volatile Organic Compounds, abbreviation VOCs), refers to that under normal pressure, boiling point is in 50-
Organic compound between 260 DEG C.The complicated component of VOCs, the difference according to its functional group can be divided into linear paraffin, cycloalkane,
Halogenated hydrocarbons, aromatic hydrocarbon, alcohols, ketone, phenols, ethers, esters etc..Many VOCs have neurotoxicity, kidney and hepatotoxicity,
Even there is carcinogenesis, blood constituent and cardiovascular system can be damaged, cause gastrointestinal disturbance, induction immune system, interior point
Secrete system and disease of hematopoietic system, cause metabolic deficiency.The composition of organic exhaust gas is extremely complex, in an atmosphere can be with other gases
There is series of chemical under certain condition in pollutant (as SOx, NOx), particulate matter etc., produce secondary pollution, lead to light
The concentration liter of chemical fumes, secondary organic aerosol and air organic acid is high, is detrimental to health and plant growth；And halo
Hydro carbons can occur chain reaction in stratosphere with ozone, destroys atmospheric ozone layer, and then it is tight to affect the meeting of global environment VOCs waste gas
Environment is polluted in important place, endangers human health.With the continuous improvement of industrialization degree, the pollution of VOCs has expand further to become
Gesture, therefore, furthers investigate its pollutant abatement technology, has great importance for the pollution controlling and administering VOCs waste gas.By
Feature in various VOCs waste gas different it should take targetedly processing method, to reduce treatment cost, avoid secondary
Pollution.Through years of researches, industrially the VOCs purification techniques of successful Application mainly has absorption process, absorption at present
Method, condensation method, membrane separation process, biochemical process, low temperature plasma method, photocatalytic oxidation and combustion method.Production by Catalytic Combustion Process is mesh
The front VOCs purification techniques being most widely used in the world.Production by Catalytic Combustion Process refers to aoxidize using catalyst degradation organic matter
Activation energy required for reaction, and improve reaction rate, thus carrying out flameless combustion at a lower temperature, it is eventually converted into
CO2And H2The innocuous substances such as O.Compared with directly burning and flame combustion, catalysis burning is not only applied widely, and purification efficiency is high,
And ignition temperature low (about at 200 DEG C -450 DEG C), the time of staying short (about 0.25s), it also avoid high temperature generation simultaneously
NOx etc. and the secondary pollution problem that causes.High performance oxidation catalyst is the key of catalytic combustion technology.
It is presently used for being catalyzed the oxidation catalyst of burning removing VOCs, its active ingredient mainly includes noble metal (Pd, Pt
Based on), transition metal (Cu, Mn, Cd, Ni, Co, Cr etc.) and rare earth metal (Ce, La etc.) oxide, and composite oxides
(perovskite, spinelle and Cu-Mn-O etc.).Carrier mainly has oxide (Al2O3、TiO2、SiO2、CeO2、ZrO2、Fe2O3
Deng), zeolite, ceramic honey comb, metallic carrier etc..Carrying method has infusion process, electrodeposition process, sol-gal process, reverse microemulsion method
With the precipitation method etc..These catalyst materials cut both ways, and such as noble metal catalyst catalytic effect is optimal, but expensive and anti-
Poisoning poor it is more difficult to control precipitation position, repeatability bad；Nucleation process is easier to occur in the solution, rather than sends out
Life is on carrier；The metallic particles generating is larger, and uniformity is bad.The waste gas producing during roasting can cause environmental pollution, is dried
When can lead to active component migrate.Oxide catalyst has certain selectivity to the organic gas processing and effect is relatively
Less stable for noble metal.Therefore, reasonably design catalyst material, so that catalyst is more effectively played a role,
Make catalytic effect and economy can reach preferably unified, and increase the Stability and adaptability of catalyst, be at present urgently
Technical problem to be solved.
Content of the invention
For above-mentioned problem, overcome the deficiencies in the prior art, the present invention provides one kind to have high selectivity, high work
Property, high stability, low light-off temperature, the new VOCs oxidation catalyst of long life.Using the good porous of heat endurance
Material TiO2Do carrier, add precious metals pt as active component simultaneously.Rare earth oxide has promoting catalysis, can improve and urge
Change activity and heat endurance, wherein CeO2There is obvious storage oxygen effect.Auxiliary agent Ce can not only improve catalyst activity, Er Qieneng
Improve the ageing resistace of catalyst, improve the ability of the anti-phase transformation of TiO2.Citric acid, as competitive adsorbate, can effectively change
Pt, in the dispersity of carrier surface or even inside, controls the distribution of Pt.With the catalyst of this technology preparation, compare simple expensive
Metallic catalyst, can substantially reduce the usage amount of noble metal, and by can be to VOCs by less noble metal reasonable layout
Some stronger macromoleculars of middle non-oxidizability play good catalytic action, reach fast oxidative effect.Catalyst material
Reasonable layout, can play good catalytic effect, greatly reduce the usage amount of noble metal again, saved cost.
In order to solve above-mentioned technical problem, a kind of catalyst for VOCs catalytic oxidation use proposed by the present invention
Preparation method, uses porous material TiO2As carrier, with CeO2With citric acid as auxiliary agent, add precious metals pt as work simultaneously
Property component, comprises the following steps that：
Step one, by the chloroplatinic acid solid dissolving containing the crystallization water in water, be configured to 0.049mmol/mL platinum acid chloride solution,
Drip the hydrochloric acid that several drop volumes are than 0.1% thereto, be used for preventing platinum acid chloride solution from decomposing；
Take powder TiO2Deionized water is cleaned multiple times, dry for standby；
Step 2, by appropriate CeO2, citric acid, TiO2It is added in a glass container, drip chloroplatinic acid in this container
Solution, wherein, CeO2：Citric acid：TiO2：The mass ratio of Pt is 6～13:1:89～90:1, dropping platinum acid chloride solution while
It is stirred vigorously 60～80min, then, by mixed liquor steeped overnight under 60～80 DEG C of constant temperature；
Step 3, take the mixed liquor after dipping, 80 DEG C of waters bath with thermostatic control heating are evaporated, and put in 80 DEG C of baking ovens and are dried
12h, obtains solid；
Step 4, above-mentioned solid is placed in Muffle furnace, under 500 DEG C and air atmosphere, roasting 5h, obtain catalyst
Presoma；
Step 5, above-mentioned presoma is placed in 300 DEG C and H of tube furnace2Under atmosphere, reduction 3h obtains being catalyzed for VOCs
The catalyst of oxidation.
By the above-mentioned catalyst oxidation being used for VOCs catalysis oxidation preparing, it is 70～300 DEG C in reaction temperature
Under the conditions of be fixed bed reaction, thus volatile organic matter is oxidized to carbon dioxide and water.Described volatile organic matter bag
Include one of acetone, ethyl acetate and pentane.
Compared with prior art, the invention has the beneficial effects as follows：
(1) the inventive method prepares oxidation VOCs using the inorganic salts of common and economic noble metal and rare earth oxide
Catalyst；
(2) metallic particles that catalyst generates is less, and, in 2～10nm, uniformity is good for particle size range；
(3) effectively change the dispersity in carrier surface or even inside for the Pt, control being uniformly distributed of precious metals pt；
(4) catalyst is anti-aging, and anti-phase transition performance is good；
(5) this catalyst has high selectivity and purification efficiency to the purification of VOCs, and operating temperature range can be in 70-
300 DEG C, as shown in figure 1, when conversion ratio is 100%, its conversion temperature is only at 250 DEG C about.
To sum up, the catalyst that the present invention prepares, for volatile organic matter is oxidized to carbon dioxide and water, has
High selectivity, high activity, high stability, low light-off temperature, the advantages of the long life, have good using value and front
Scape.
Brief description
Fig. 1 is the conversion ratio to acetone for the catalyst that the embodiment of the present invention 1 obtains；
Fig. 2 is the XRD of the catalyst that present example example 1 obtains；
Fig. 3 is the XRD of the catalyst that present example example 2 obtains；
Fig. 4 is the XRD of the catalyst that present example example 3 obtains.
Specific embodiment
With specific embodiment, technical solution of the present invention is described in further detail below in conjunction with the accompanying drawings, described is concrete
Embodiment only explains to the present invention, not in order to limit the present invention.
Embodiment 1
(1) by the chloric acid platinum solid dissolving containing the crystallization water in water, it is configured to 0.049mmol/mL platinum acid chloride solution, drip
Plus several hydrochloric acid, wherein, the volume ratio 0.1% of hydrochloric acid, prevent its decomposition.Take 2.7259g powder TiO2Deionized water is entered
Row is cleaned multiple times, dry for standby；
(2) by 0.3758g CeO2, 0.0302g citric acid and TiO2It is added in beaker, dropping 4.27ml chloroplatinic acid is molten
It is stirred vigorously while liquid, 80 DEG C of constant temperature stirrings, the rotor adjusting agitator is so as to mix.Stop after about 60min stirring
Mix, steeped overnight；
(3) take the mixed liquor after dipping, 80 DEG C of water bath with thermostatic control heating are evaporated, and put in 80 DEG C of baking ovens and are dried 12h；
(4) above-mentioned solid is placed in Muffle furnace, under 500 DEG C and air atmosphere, roasting 5h, obtain the forerunner of catalyst
Body；
(5) above-mentioned presoma is placed in 300 DEG C and H of tube furnace2Under atmosphere, reduction 3h obtains final product the target for processing VOCs
Product catalyst, the XRD of this catalyst as shown in Fig. 2 its catalysis activity is shown in Fig. 1, wherein, active testing condition：1000ppm
Acetone, O2, N2For balanced gas, reaction temperature is 70～300 DEG C, is 25000h in air speed-1, experimental facilities：VOCs is catalyzed oxygen
Change evaluating apparatus.
Embodiment 2
(1) by the chloric acid platinum solid dissolving containing the crystallization water in water, it is configured to 0.049mmol/mL platinum acid chloride solution, drip
Plus several hydrochloric acid, wherein, the volume ratio 0.1% of hydrochloric acid, prevent its decomposition.Take 2.7905g powder TiO2Deionized water is entered
Row is cleaned multiple times, dry for standby；
(2) by 0.1892gCeO2, 0.0340g citric acid and TiO2It is added in beaker, dropping 4.27ml chloroplatinic acid is molten
It is stirred vigorously while liquid, 60 DEG C of constant temperature stirrings, the rotor adjusting agitator is so as to mix.Stop after about 60min stirring
Mix, steeped overnight；
(3) take the mixed liquor after dipping, 80 DEG C of water bath with thermostatic control heating are evaporated, and put in 80 DEG C of baking ovens and are dried 12h；
(4) above-mentioned solid is placed in Muffle furnace, under 500 DEG C and air atmosphere, roasting 5h, obtain the forerunner of catalyst
Body；
(5) above-mentioned presoma is placed in 300 DEG C and H of tube furnace2Under atmosphere, reduction 3h obtains final product the target for processing VOCs
Product catalyst.The XRD of this catalyst is as shown in Figure 3.
Embodiment 3
(1) by the chloric acid platinum solid dissolving containing the crystallization water in water, it is configured to 0.049mmol/mL platinum acid chloride solution, dropping
Several hydrochloric acid, wherein, the volume ratio 0.1% of hydrochloric acid, prevent its decomposition.Take 2.7581g powder TiO2Deionized water is carried out
It is cleaned multiple times, dry for standby；
(2) by 0.2655g CeO2, 0.0345g citric acid and TiO2It is added in beaker, dropping 4.27ml chloroplatinic acid is molten
It is stirred vigorously while liquid, 60 DEG C of constant temperature stirrings, the rotor adjusting agitator is so as to mix.Stop after about 80min stirring
Mix, steeped overnight；
(3) take the mixed liquor after dipping, 80 DEG C of water bath with thermostatic control heating are evaporated, and put in 80 DEG C of baking ovens and are dried 12h；
(4) above-mentioned solid is placed in Muffle furnace, under 500 DEG C and air atmosphere, roasting 5h, obtain the forerunner of catalyst
Body；
(5) above-mentioned presoma is placed in 300 DEG C and H of tube furnace2Under atmosphere, reduction 3h obtains final product the target for processing VOCs
Product catalyst, the XRD of this catalyst is as shown in Figure 4.
In preparation method of the present invention, CeO2：Citric acid：TiO2：The mass ratio of Pt is 6～13:1:89～90:1, here ratio
Example under, can be best play promote Pt distribution, whipping process be 60～80 DEG C of constant temperature under be stirred vigorously 60～80min, 80 DEG C
Water bath with thermostatic control heating is evaporated, and puts in 80 DEG C of baking ovens and is dried 12h, be placed in afterwards in Muffle furnace, in 500 DEG C and air atmosphere
Under, roasting 5h, it is placed in 300 DEG C and H of tube furnace2Under atmosphere, reduce 3h.
Although above in conjunction with accompanying drawing, invention has been described, the invention is not limited in above-mentioned being embodied as
Mode, above-mentioned specific embodiment is only schematically, rather than restricted, and those of ordinary skill in the art is at this
Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to the present invention's
Within protection.
Claims (3)
1. a kind of preparation method of the catalyst for VOCs catalytic oxidation use is it is characterised in that use porous material TiO2As load
Body, with CeO2With citric acid as auxiliary agent, add precious metals pt as active component simultaneously, comprise the following steps that：
Step one, by the chloroplatinic acid solid dissolving containing the crystallization water in water, be configured to 0.049mmol/mL platinum acid chloride solution, Xiang Qi
The middle dropping hydrochloric acid than 0.1% for several drop volumes, is used for preventing platinum acid chloride solution from decomposing；
Take powder TiO2Deionized water is cleaned multiple times, dry for standby；
Step 2, by appropriate CeO2, citric acid, TiO2It is added in a glass container, in this container, dropping chloroplatinic acid is molten
Liquid, wherein, CeO2：Citric acid：TiO2：The mass ratio of Pt is 6～13:1:89～90:1,60 while dropping platinum acid chloride solution
It is stirred vigorously 60～80min, then, by mixed liquor steeped overnight under～80 DEG C of constant temperature；
Step 3, take the mixed liquor after dipping, 80 DEG C of waters bath with thermostatic control heating are evaporated, and put in 80 DEG C of baking ovens and are dried 12h, obtain
To solid；
Step 4, above-mentioned solid is placed in Muffle furnace, under 500 DEG C and air atmosphere, roasting 5h, obtain the forerunner of catalyst
Body；
Step 5, above-mentioned presoma is placed in 300 DEG C and H of tube furnace2Under atmosphere, reduction 3h obtains for VOCs catalysis oxidation
Catalyst.
2. a kind of application of the catalyst for VOCs catalytic oxidation use, preparation method shown in claim 1 is prepared
For the catalyst oxidation of VOCs catalysis oxidation, it is fixed bed reaction under conditions of reaction temperature is 70～300 DEG C, thus
Volatile organic matter is oxidized to carbon dioxide and water.
3. according to claim 2 be used for VOCs catalytic oxidation use catalyst application it is characterised in that：Described volatility
Organic matter includes one of acetone, ethyl acetate and pentane.
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| CN108404920A (en) * | 2018-01-16 | 2018-08-17 | 天津大学 | A kind of preparation method of the catalyst of degradation VOCs |
| CN109317141A (en) * | 2018-11-14 | 2019-02-12 | 泉州师范学院 | A kind of preparation method of the Pt base catalyst for benzene catalysis oxidation |
| CN110523413A (en) * | 2018-05-25 | 2019-12-03 | 中国科学院大连化学物理研究所 | A kind of preparation method of supported catalyst and the application in the catalytic oxidation of benzene |
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