CN107191948A - A kind of Integral electric pyrogenicity wire mesh catalyst is catalyzed aflame application in volatile organic waste gas - Google Patents
A kind of Integral electric pyrogenicity wire mesh catalyst is catalyzed aflame application in volatile organic waste gas Download PDFInfo
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- CN107191948A CN107191948A CN201710386386.8A CN201710386386A CN107191948A CN 107191948 A CN107191948 A CN 107191948A CN 201710386386 A CN201710386386 A CN 201710386386A CN 107191948 A CN107191948 A CN 107191948A
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- wire mesh
- catalyst
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- 239000003054 catalyst Substances 0.000 title claims abstract description 62
- 239000002510 pyrogen Substances 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 title claims abstract description 12
- 239000010815 organic waste Substances 0.000 title description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 37
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 36
- 239000012153 distilled water Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000011010 flushing procedure Methods 0.000 claims abstract description 33
- 239000002105 nanoparticle Substances 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 238000002604 ultrasonography Methods 0.000 claims abstract description 26
- 239000006185 dispersion Substances 0.000 claims abstract description 20
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 14
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 7
- 238000010304 firing Methods 0.000 claims abstract description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 39
- 238000002360 preparation method Methods 0.000 claims description 35
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 30
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 28
- 238000006555 catalytic reaction Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 13
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 8
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 8
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 8
- 239000005642 Oleic acid Substances 0.000 claims description 8
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 8
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 8
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 8
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 2
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 claims description 2
- 230000001186 cumulative effect Effects 0.000 claims description 2
- 229910001120 nichrome Inorganic materials 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 claims description 2
- 238000003746 solid phase reaction Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 14
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 229910000510 noble metal Inorganic materials 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000002269 spontaneous effect Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 28
- 239000002184 metal Substances 0.000 description 28
- -1 Iron-chromium-aluminum Chemical compound 0.000 description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 239000012298 atmosphere Substances 0.000 description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 11
- 239000004411 aluminium Substances 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 10
- 229910052737 gold Inorganic materials 0.000 description 10
- 239000010931 gold Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 9
- 206010013786 Dry skin Diseases 0.000 description 9
- 238000013019 agitation Methods 0.000 description 9
- 229910052804 chromium Inorganic materials 0.000 description 9
- 239000011651 chromium Substances 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 9
- 239000010970 precious metal Substances 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 125000005909 ethyl alcohol group Chemical group 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 241000264877 Hippospongia communis Species 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000001652 electrophoretic deposition Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002082 metal nanoparticle Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- ZDPCYBPGTYHQJT-UHFFFAOYSA-N N(=O)[Pt](N)N Chemical compound N(=O)[Pt](N)N ZDPCYBPGTYHQJT-UHFFFAOYSA-N 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- HYKFUNUAQCOKEW-UHFFFAOYSA-N ethyl acetate;hexane;toluene Chemical compound CCCCCC.CCOC(C)=O.CC1=CC=CC=C1 HYKFUNUAQCOKEW-UHFFFAOYSA-N 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
-
- 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
- B01J23/8993—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 chromium, molybdenum or tungsten
-
- 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
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/393—Metal or metal oxide crystallite size
-
- 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
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/394—Metal dispersion value, e.g. percentage or fraction
-
- 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
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A kind of application of Integral electric pyrogenicity wire mesh catalyst in catalytic combustion volatility organic exhaust gas, the catalyst is prepared in accordance with the following steps：(1) wire mesh material is placed in acetone ultrasonic oil removing, it is clean with distilled water flushing；Woven wire is placed in ultrasound in NaOH solution again, it is clean with distilled water flushing；Woven wire is finally placed in HNO3In solution ultrasound remove surface oxide, with distilled water flushing it is clean after, dry；(2) pretreated woven wire is placed in pure oxygen and calcined；(3) Pt or Pd nanoparticle sols dispersion liquid is sprayed on woven wire after firing, then dried, then be calcined the Integral electric pyrogenicity wire mesh catalyst for obtaining supporting Pt or Pd nano-particles.Catalyst activity component high degree of dispersion of the present invention is difficult to reunite and strong with carrier binding ability, with noble metal dosage it is few, it is active it is high, be powered can spontaneous heating the characteristics of so that the application with energy-conservation, efficiently, the characteristic of fast reaction.
Description
Technical field
The present invention relates to a kind of Integral electric pyrogenicity wire mesh catalyst in catalytic combustion volatility organic exhaust gas
(VOCs) application in.
Background technology
Existing VOC (VOCs) combustion catalyst mainly has granular pattern and integral catalyzer.Particle
Type catalyst can produce " focus " and localized hyperthermia in catalysis burning strong exothermal reaction, the easy sintering deactivation of catalyst, and
Beds pressure drop is high, is not suitable for the big flux organic exhaust gas of processing.At present, integral catalyzer often uses ceramic honey comb matrix
(such as cordierite) is as carrier, and ceramic honey comb matrix is present that mass transfer and heat transfer efficiency be not high, mechanical strength is not high, structure regulation
Property difference the shortcomings of.And the integral catalyzer being made up of wire as carrier has low pressure drop, high mechanical strength, electric conductivity
The features such as excellent, high heat conductance and structure controllability, therefore be considered as convenient combustion catalysis agent carrier, in environment neck
Most competitive catalysis material in domain.
Wire for base material combustion catalyst in Key technique problem be：Metal base material and surface active composition it
Between bond strength, many catalyticing research personnel propose some solutions, and such as Chinese patent (CN2007100627288.4) leads to
Electrophoretic deposition technique is crossed, first in metal surface electro-deposition aluminium powder micro particles, then roasting prepares high bond strength
Al2O3Coating, then in Al2O3Coating surface supported catalyst active component, this method can preferably control coating layer thickness and
Intensity；Chinese patent (CN200810062150.X) then uses anodic oxidation preparation technology, first in metal substrate surface formation oxygen
Change film, then supported catalyst active component again, prepare the hardware catalyst of high bond strength.These technologies all compared with
The good bond strength solved the problems, such as between metallic substrates and catalyst, but can not be ignored, these technologies are all employed
The technology of electrochemistry, electrophoretic deposition and anodizing technology are required for connecing positive and negative electrode, and the inhomogeneities of its electric field easily causes
Treatment of Metal Surface degree it is inconsistent, whole technological process is relatively complicated in addition, cost is higher.What is more important, gold
The adjustable denaturation of structure for belonging to base material is restricted.In addition, traditional catalysis burning is required for the mode of external heat source, such as：Fuel
Combustion heating, resistance stove heat etc..This mode of heating energy consumption is very big, and capacity usage ratio is low.Therefore one kind is needed more
To be simple, to the material of any metal structure effectively and can to the catalyst preparation process of catalyst energization pyrogenicity in itself, with
Improve applicability of such catalyst in environmental catalysis field.
The content of the invention
It is an object of the invention to exist for above-mentioned technical problem there is provided a kind of Integral electric pyrogenicity wire mesh catalyst
Application in catalytic combustion volatility organic exhaust gas, the method for preparing catalyst is simple, has to the material of any metal structure
Effect, catalyst activity component high degree of dispersion is difficult to reunite and strong with carrier binding ability, with noble metal dosage it is few, it is active it is high,
Be powered can spontaneous heating the characteristics of so that volatile organic waste gas catalysis burning with energy-conservation, efficiently, the characteristic of fast reaction.
For achieving the above object, the technical solution adopted by the present invention is as follows：
A kind of application of Integral electric pyrogenicity wire mesh catalyst in catalytic combustion volatility organic exhaust gas, it is described whole
The electroluminescent hot wire mesh catalyst of body formula is prepared in accordance with the following steps：
(1) surface preparation of metallic substrates：Wire mesh material is placed in ultrasound 5-30min oil removings in acetone, with steaming
Distilled water is rinsed well；Woven wire is placed in ultrasound 5-30min in 5-10wt% NaOH solution again, it is dry with distilled water flushing
Only；Woven wire is finally placed in 5-10wt% HNO3Ultrasound 5-30min removes the oxide on surface in solution, uses distilled water
After rinsing well, 0.5-5h is dried at a temperature of 60-150 DEG C；
(2) preparation of wire surface coating：Pretreated woven wire is placed in pure oxygen and forged in 800-1200 DEG C
Burn 0.5-12h；
(3) Pt or Pd nanoparticle sols dispersion liquid is sprayed on woven wire after firing, then in 50-150 DEG C
Lower dry 0.5-5h, then in 400-800 DEG C of roasting temperature 3-8h, so as to obtain the Integral electric of supporting Pt or Pd nano-particles
The load capacity of pyrogenicity wire mesh catalyst, wherein Pt or Pd is 0.01-1.0wt%.
In the present invention, the material of woven wire can be Stainless steel 316, Stainless steel 316 L, stainless steel 314, stainless steel
314L, nichrome, Aludirome, chromium aluminium molybdenum alloys etc., preferably Aludirome.
In the step (1), ultrasonic time is preferably 15-30min.Drying temperature is preferably 100-120 DEG C, drying time
Preferably 1-2h.
In the step (2), calcining heat is preferably 850-1000 DEG C, and calcination time is preferably 0.5-5h.
In the step (3), Pt or Pd nanoparticle sols dispersion liquid can be prepared via a method which：Take a certain amount of two
Nitroso diamino platinum or palladium bichloride, add a certain amount of oleyl amine and oleic acid, in a nitrogen atmosphere, in reacting 1- at 100-300 DEG C
6h, products therefrom centrifuges through ethanol, precipitate after, be scattered in n-hexane, obtain Pt or Pd nanoparticle sol dispersion liquids.
Further, the ratio between cumulative volume of the quality of dinitroso diammonia platinum or palladium bichloride and oleyl amine and oleic acid is preferably
0.01-0.1g：The volume ratio of 1-30mL, oleyl amine and oleic acid is preferably 1-5：0.5-2.
In the step (3), sintering temperature is preferably 450-600 DEG C, and roasting time is preferably 3-6h.
The Integral electric pyrogenicity wire mesh catalyst of the present invention has essence with conventional hardware type catalyst preparation
Difference, using the noble metal nano particles colloidal sol of previously prepared high activity, by atomized spray technology, catalyst nanoparticles
Metal substrate surface is sprayed directly into, by the guiding of surfactant, noble metal nano particles can be with metal component surface
Self assembly, being formed after the noble metal nano monomolecular film of high degree of dispersion, low-temperature bake to combine in metallic substrates table to high intensity
Face.
It is organic that Integral electric pyrogenicity wire mesh catalyst of the present invention can be applied to catalytic combustion elimination volatility
Waste gas, the volatile organic waste gas can be toluene, benzene, n-hexane, hexamethylene, chlorobenzene, ethyl acetate, acetone, isopropanol,
One kind or any several mixing in DMF.
In the present invention, the catalyst combustion reaction is carried out on gas-solid phase reaction device, is specially：By Integral electric pyrogenicity
Wire mesh catalyst connects wire connection D.C. regulated power supply, and by changing the electric current of D.C. regulated power supply, monoblock type is electroluminescent
Hot wire mesh catalyst can generate heat rapidly, so as to reach the temperature of catalysis burning, be passed through volatile organic waste gas and reacted,
The heat produced by integer catalyzer itself of the heat in access circuit needed for course of reaction, without external heat source.
Moreover, the energy consumption required for catalysis burning is extremely low.
The beneficial effects of the invention are as follows：(1) preparation method of catalyst of the present invention is easy, and hardware shape will not
Ask, to all kinds of metallic substrates strong applicabilities；(2) active component can be in metal substrate surface high degree of dispersion；(3) catalyst made from
Electroluminescent hot heating effect is good, capacity usage ratio is high, required energy consumption is extremely low；(4) the monoblock type wire mesh catalyst obtained by
Heat endurance is high, good mechanical property；(5) catalysis oxidation VOCs activity is high, and response is fast, can be reached under relatively low power higher
Conversion ratio.
Embodiment
In order to further illustrate the present invention, specific examples below is enumerated, but do not limit the scope of the invention.
Embodiment 1
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 950 DEG C, 3h is calcined.
The preparation of precious metals pd nano-particle：0.0176g palladium bichlorides are weighed, 3mL oleyl amines and 1mL oleic acid, nitrogen gas is added
Under atmosphere, magnetic agitation, 180 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.3 times of volume absolute ethyl alcohols are added, from
The heart (6000rpm, 5min), precipitation, is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pd nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0820g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pd load capacity is 0.05wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 2
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 950 DEG C, 3h is calcined.
The preparation of precious metals pd nano-particle：0.0352g palladium bichlorides are weighed, 6mL oleyl amines and 2mL oleic acid, nitrogen gas is added
Under atmosphere, magnetic agitation, 180 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.3 times of volume absolute ethyl alcohols are added, from
The heart (6000rpm, 5min), precipitation, is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pd nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0812g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pd load capacity is 0.1wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 3
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 950 DEG C, 3h is calcined.
The preparation of precious metals pd nano-particle：0.0704g palladium bichlorides are weighed, 12mL oleyl amines and 4mL oleic acid, nitrogen gas is added
Under atmosphere, magnetic agitation, 180 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.3 times of volume absolute ethyl alcohols are added, from
The heart (6000rpm, 5min), precipitation, is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pd nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0815g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pd load capacity is 0.2wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 4
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 950 DEG C, 3h is calcined.
The preparation of precious metals pt nano-particle：0.0173g dinitroso diammonia platinums are weighed, 2mL oleyl amines and 1mL oil is added
Under acid, nitrogen atmosphere, magnetic agitation, 200 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.Add 3 times of volumes without
Water-ethanol, is centrifuged (6000rpm, 5min), and precipitation is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pt nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0828g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pt load capacity is 0.05wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 5
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 950 DEG C, 3h is calcined.
The preparation of precious metals pt nano-particle：0.0346g dinitroso diammonia platinums are weighed, 4mL oleyl amines and 2mL oil is added
Under acid, nitrogen atmosphere, magnetic agitation, 200 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.Add 3 times of volumes without
Water-ethanol, is centrifuged (6000rpm, 5min), and precipitation is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pt nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0832g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pt load capacity is 0.1wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 6
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 950 DEG C, 3h is calcined.
The preparation of precious metals pt nano-particle：0.0692g dinitroso diammonia platinums are weighed, 9mL oleyl amines and 3mL oil is added
Under acid, nitrogen atmosphere, magnetic agitation, 200 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.Add 3 times of volumes without
Water-ethanol, is centrifuged (6000rpm, 5min), and precipitation is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pt nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0832g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pt load capacity is 0.2wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 7
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 850 DEG C, 3h is calcined.
The preparation of precious metals pt nano-particle：0.0692g dinitroso diammonia platinums are weighed, 9mL oleyl amines and 3mL oil is added
Under acid, nitrogen atmosphere, magnetic agitation, 200 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.Add 3 times of volumes without
Water-ethanol, is centrifuged (6000rpm, 5min), and precipitation is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pt nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0835g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pt load capacity is 0.2wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 8
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 900 DEG C, 3h is calcined.
The preparation of precious metals pt nano-particle：0.0692g dinitroso diammonia platinums are weighed, 9mL oleyl amines and 3mL oil is added
Under acid, nitrogen atmosphere, magnetic agitation, 200 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.Add 3 times of volumes without
Water-ethanol, is centrifuged (6000rpm, 5min), and precipitation is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pt nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0834g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pt load capacity is 0.2wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 9
Iron-chromium-aluminum metal silk (wherein chromium：23-26%, aluminium：4.5-6.5%, remaining is iron) surface preparation：Take certain
The wire of length, is rolled into helical form.Wire is placed in acetone, ultrasonic 30min is clean with distilled water flushing.Again by gold
Category silk is placed in ultrasound 30min in 10wt% NaOH solution, clean with distilled water flushing.Wire is finally placed in 10wt%'s
HNO3Ultrasound 30min in solution, 110 DEG C dry 2hs clean with distilled water flushing.
The preparation of iron-chromium-aluminum metal silk table finishing coat：Woven wire is placed in pure oxygen atmosphere, in 1000 DEG C, 3h is calcined.
The preparation of precious metals pt nano-particle：0.0692g dinitroso diammonia platinums are weighed, 9mL oleyl amines and 3mL oil is added
Under acid, nitrogen atmosphere, magnetic agitation, 200 DEG C of reaction 3h.It is cooled to after room temperature, is transferred in centrifuge tube.Add 3 times of volumes without
Water-ethanol, is centrifuged (6000rpm, 5min), and precipitation is repeated 2-3 times.Finally it is dispersed in 10mL n-hexanes.
1mL Pt nano-particle n-hexane dispersion liquids are taken to be sprayed on woven wire (quality is 2.0818g), 110 DEG C of dryings
2h, then at 500 DEG C of roasting 5h, obtains the monoblock type wire mesh catalyst that Pt load capacity is 0.2wt%.
The monoblock type wire mesh catalyst that the present embodiment is obtained is placed in reaction tube, and direct current is accessed in two ends after connecting wire
Voltage-stabilized power supply, by changing the electric current of D.C. regulated power supply, so that electroluminescent hot mode of heating is realized, for being catalyzed burning VOCs
Active testing.
Embodiment 10
The sample that each embodiment is obtained, for testing catalyst combustion reaction activity.Respectively with toluene：2500ppm, acetic acid
Ethyl ester：2500ppm, n-hexane:2500ppm, acetone：2500ppm catalysis oxidations as probe reaction, air speed be 20 ×
104Catalytic combustion properties evaluation is carried out under conditions of ml/gh.Bulk metal mesh catalyst is placed in reactor, is catalyzed
Agent two ends are respectively turned on wire and are connected with D.C. regulated power supply, change electric current, are brought rapidly up catalyst, so as to reach catalysis combustion
Temperature required for burning, is passed through toluene ethyl acetate n-hexane or acetone is reacted.
Required power burns as catalysis when reaching 90% using the conversion ratio of toluene, ethyl acetate, n-hexane, acetone
Performance evaluation criterion, the results are shown in Table 1.
The wire mesh catalyst of table 1 catalysis burning toluene, ethyl acetate, n-hexane and acetone performance evaluation
Claims (10)
1. a kind of application of Integral electric pyrogenicity wire mesh catalyst in catalytic combustion volatility organic exhaust gas, its feature exists
In：The Integral electric pyrogenicity wire mesh catalyst is prepared in accordance with the following steps：
(1) surface preparation of metallic substrates：Wire mesh material is placed in ultrasound 5-30min oil removings in acetone, distilled water is used
Rinse well；Woven wire is placed in ultrasound 5-30min in 5-10wt% NaOH solution again, it is clean with distilled water flushing；Most
Woven wire is placed in 5-10wt% HNO afterwards3Ultrasound 5-30min removes the oxide on surface in solution, uses distilled water flushing
After clean, 0.5-5h is dried at a temperature of 60-150 DEG C；
(2) preparation of wire surface coating：Pretreated woven wire is placed in pure oxygen in 800-1200 DEG C of calcining
0.5-12h；
(3) Pt or Pd nanoparticle sols dispersion liquid is sprayed on woven wire after firing, then in dry at 50-150 DEG C
Dry 0.5-5h, then in 400-800 DEG C of roasting temperature 3-8h, so as to obtain supporting Pt or the Integral electric pyrogenicity of Pd nano-particles
The load capacity of wire mesh catalyst, wherein Pt or Pd is 0.01-1.0wt%.
2. application as claimed in claim 1, it is characterised in that：Catalyst combustion reaction is carried out on gas-solid phase reaction device, tool
Body is：Integral electric pyrogenicity wire mesh catalyst is connected into wire connection D.C. regulated power supply, by changing DC voltage-stabilizing electricity
The electric current in source, Integral electric pyrogenicity wire mesh catalyst can generate heat rapidly, so as to reach the temperature of catalysis burning, be passed through volatilization
Property organic exhaust gas reacted, the heat needed for course of reaction from access circuit in Integral electric pyrogenicity woven wire urge
Heat produced by agent itself, without external heat source.
3. application as claimed in claim 1 or 2, it is characterised in that：The material of woven wire is Stainless steel 316, stainless steel
316L, stainless steel 314, stainless steel 314L, nichrome, Aludirome or chromium aluminium molybdenum alloys.
4. application as claimed in claim 3, it is characterised in that：The material of woven wire is Aludirome.
5. application as claimed in claim 1 or 2, it is characterised in that：In the step (1), ultrasonic time is 15-30min.
6. application as claimed in claim 1 or 2, it is characterised in that：Drying temperature is 100-120 DEG C, and drying time is 1-2h.
7. application as claimed in claim 1 or 2, it is characterised in that：In the step (2), calcining heat is 850-1000 DEG C,
Calcination time is 0.5-5h.
8. application as claimed in claim 1 or 2, it is characterised in that：In the step (3), Pt or Pd nanoparticle sols point
Dispersion liquid is prepared via a method which：A certain amount of dinitroso diammonia platinum or palladium bichloride are taken, a certain amount of oleyl amine and oleic acid is added,
In a nitrogen atmosphere, in reacting 1-6h at 100-300 DEG C, products therefrom centrifuges through ethanol, precipitate after, be scattered in n-hexane,
Obtain Pt or Pd nanoparticle sol dispersion liquids.
9. application as claimed in claim 8, it is characterised in that：The quality of dinitroso diammonia platinum or palladium bichloride and oleyl amine and oil
The ratio between cumulative volume of acid is 0.01-0.1g：The volume ratio of 1-30mL, oleyl amine and oleic acid is 1-5：0.5-2.
10. application as claimed in claim 1 or 2, it is characterised in that：In the step (3), sintering temperature is 450-600 DEG C,
Roasting time is 3-6h.
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