CN106824192A - A kind of carbon-smoke combustion CuO catalyst of high activity and its preparation method and application - Google Patents
A kind of carbon-smoke combustion CuO catalyst of high activity and its preparation method and application Download PDFInfo
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- CN106824192A CN106824192A CN201611229138.4A CN201611229138A CN106824192A CN 106824192 A CN106824192 A CN 106824192A CN 201611229138 A CN201611229138 A CN 201611229138A CN 106824192 A CN106824192 A CN 106824192A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 54
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 44
- 239000000779 smoke Substances 0.000 title claims abstract description 41
- 230000000694 effects Effects 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 19
- 238000009826 distribution Methods 0.000 claims abstract description 3
- 239000012670 alkaline solution Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 21
- 238000009938 salting Methods 0.000 claims description 17
- 238000001354 calcination Methods 0.000 claims description 10
- 238000001556 precipitation Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical group OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 15
- 229910000510 noble metal Inorganic materials 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 18
- 239000010949 copper Substances 0.000 description 14
- 229910052799 carbon Inorganic materials 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 239000004071 soot Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 7
- 239000008187 granular material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 5
- 238000006555 catalytic reaction Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000314 transition metal oxide Inorganic materials 0.000 description 2
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 235000011868 grain product Nutrition 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/72—Copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Composite Materials (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
Abstract
A kind of carbon-smoke combustion CuO catalyst the present invention relates to high activity and its preparation method and application, the carbon-smoke combustion CuO catalyst is Nanoparticulate pattern, and particle diameter distribution is 20~100 nm.Carbon-smoke combustion CuO catalyst prepared by the present invention is free of any noble metal, and well-crystallized.The method is with low cost, and yield efficiently, without professional equipment, is worth with great industrialization production.
Description
Technical field
The invention belongs to catalysis material technical field, and in particular to the one kind for purifying soot in exhaust gas from diesel vehicle is high living
Carbon-smoke combustion CuO catalyst of property and preparation method thereof.
Background technology
Diesel vehicle is widely used due to the advantage such as its economy, thermal effect are high and voyage is long in real life.
However, the particulate matter (PM, predominantly carbon black granules) of diesel emission and nitrogen oxides serious harm environment and the mankind, because
This, efficient post processing purification technique is imperative.Generally, a particulate filter (DPF) is used to collect exhaust gas from diesel vehicle
In carbon black granules, the carbon black granules of collection can an at a relatively high temperature (>600 DEG C) by O2Oxidation.However, diesel engine
Delivery temperature it is general at 150 to 400 DEG C, its relatively low temperature makes it difficult for the carbon black granules in tail gas to be burnt, and makes for a long time
DPF is caused to inactivate after.Therefore, a kind of efficient catalyst is developed, complete oxidation is at a lower temperature to make carbon black granules
One extremely urgent work.
The catalyst of carbon soot particles oxidation is commonly used in, such as：CeO2Based compound, perovskite oxide, noble metal base
Catalyst etc., or be unfavorable for contact of the avtive spot with carbon particle in default of loose structure and then cause catalyst activity
It is too low, or because the preparation cost of loose structure is excessively high, or because the high cost and easy Poisoning of noble metal, so that
It is unfavorable for the sizable application of carbon soot particles oxidation catalyst.
The content of the invention
In view of the shortcomings of the prior art, present invention aim at a kind of low-load amount noble metal type carbon-smoke combustion catalysis of offer
Agent and its preparation method and application.
On the one hand, the invention provides a kind of carbon-smoke combustion CuO catalyst of high activity, the carbon-smoke combustion CuO catalysis
Agent is Nanoparticulate pattern, and particle diameter distribution is 20~100nm.
The carbon-smoke combustion CuO catalyst of high activity of the present invention is transition metal oxide type catalyst, with crystallization
Structure, is presented high-dispersion nano graininess pattern, can with carbon particle high-efficient contact, and in terms of the combustion degradation of solid pollutant
There is potential application foreground.
It is preferred that the specific surface area of the carbon-smoke combustion CuO catalyst is 10-20m2/ g, pore size is 10-160nm,
Pore volume is 0.05-0.10cm3/g。
On the other hand, present invention also offers a kind of preparation method of carbon-smoke combustion CuO catalyst, it is characterised in that will
Certain hour is stirred after Cu salting liquids A and alkaline solution B mixing, then 1 is calcined at 400~600 DEG C after washing being centrifuged, dries
~5 hours, obtain the carbon-smoke combustion CuO catalyst.
The present invention prepares the carbon-smoke combustion CuO catalyst using the precipitation method, and methods described is easy to operate and amplify production,
Raw material is cheap and easy to get, without professional equipment, with great commercial application prospect.
It is preferred that nitrate of the Cu salt for Cu, acetate, at least one in sulfate, chloride, the Cu salt
The molar concentration of solution A is 0.01~0.50mol/L.
It is preferred that solute is bicarbonate or/and carbonate, preferably bicarbonate, the alkali in the alkaline solution B
Property solution B concentration be 0.5~5.0mol/L.
It is preferred that the volume ratio of the Cu salting liquids A and alkaline solution B is (0.1~10)：1.
It is preferred that the Cu salting liquids A and alkaline solution B hybrid modes are quickly poured into Cu salting liquids A for alkaline solution B
In, Cu salting liquids A instill in alkaline solution B or Cu salting liquids A and alkaline solution B parallel-flow precipitations, preferably alkaline solution B is fast
Speed is poured into Cu salting liquids A.It is preferred that the metal salt solution A and alkaline solution B are stirred at 0~100 DEG C 5 minutes~
24 hours.
It is preferred that the heating rate of the calcining is 0.5~10 DEG C/min, preferably 1 DEG C/min.
Another further aspect, present invention also offers a kind of application of carbon-smoke combustion CuO catalyst in motor-driven vehicle gas disposal.
Carbon-smoke combustion CuO catalyst the invention provides a kind of high activity and preparation method thereof.The material is through precipitation
Method is obtained, and generates at room temperature, and without any organic matter, crystallization is good after calcining, and high-dispersion nano graininess pattern is presented,
Carbon soot particles can be burnt completely below 390 DEG C.Carbon-smoke combustion CuO catalyst prepared by the present invention is free of any your gold
Category, and well-crystallized.The method is with low cost, and yield efficiently, without professional equipment, is worth with great industrialization production.
Brief description of the drawings
Fig. 1 is the transmission electron microscope of the carbon-smoke combustion CuO catalyst of the high activity obtained by the embodiment of the present invention 1
Figure；
Fig. 2 is the high-resolution transmission electron microscopy of the carbon-smoke combustion CuO catalyst of the high activity obtained by the embodiment of the present invention 1
Mirror figure；
Fig. 3 is the X ray diffracting spectrum of the carbon-smoke combustion CuO catalyst of the high activity obtained by the embodiment of the present invention 1；
Fig. 4 is the carbon-smoke combustion CuO catalyst carbon-smoke combustion design sketch of high activity in the embodiment of the present invention 2.
Specific embodiment
The present invention is further illustrated below by way of following implementation methods, it should be appreciated that following implementation methods are merely to illustrate this
Invention, is not intended to limit the present invention.
The present invention prepares the carbon-smoke combustion CuO catalyst of high activity with mantoquita and alkaline solution as raw material using the precipitation method.
Wherein, the carbon-smoke combustion CuO catalyst is the transition metal oxide type catalyst that high-dispersion nano graininess pattern is presented,
Its well-crystallized.The diameter of the carbon-smoke combustion CuO catalyst nano-particles can be 20~100nm.
The present invention obtains the soot combustion catalyst of high activity using the method for very cheap and simple.Following exemplary
The preparation method of the carbon-smoke combustion CuO catalyst of the high activity that the ground explanation present invention is provided.
A certain amount of, a certain proportion of raw material is dissolved into a certain amount of solvent (such as water, alcohol water mixed solvent etc.)
In obtain Cu salting liquids A (hereinafter referred to as solution A).Raw material can be the nitrate of Cu, acetate, sulfate or chlorination
One or more in thing, Cu sources are preferably nitrate.In solution A the concentration of metal ion (copper ion) can for 0.01~
0.50mol/L, preferably 0.10~0.30mol/L.
Precipitating reagent is dissolved into a certain amount of solvent (such as water, alcohol water mixed solvent etc.) and obtains alkaline solution B.Alkalescence
Precipitating reagent used by solution B can be bicarbonate, the alkaline matter such as carbonate (such as ammonium carbonate or/and sodium carbonate), preferably
Bicarbonate (such as ammonium hydrogen carbonate, sodium acid carbonate etc.).The concentration of precipitating reagent can be 0.5~5.0mol/ in gained alkaline solution B
L, preferably 0.5~1.0mol/L.
Under stirring condition, solution A, alkaline solution B are mixed, certain hour is stirred under uniform temperature, obtain containing precipitation
The mixed liquor of material (carbonate or/and bicarbonate of Cu).Wherein solution A, alkaline solution B hybrid modes can be that alkalescence is molten
Liquid B is quickly poured into solution A, and (alkali formula) carbonate deposition, when quickly mixing, large-scale homogeneous nucleation are formd during being somebody's turn to do
Almost occur simultaneously, it is then synchronous to grow up, finally give the product of fine grain.Or in solution A instillation alkaline solution B, should
During form (alkali formula) carbonate deposition, adopt when mixing in this way, precipitation is quick to be formed, and is similarly served to favor and is obtained particulate
Footpath product.(alkali formula) carbonate deposition can be formd, using this during being somebody's turn to do with solution A, alkaline solution B parallel-flow precipitations
When mode mixes, precipitation is quick to be formed, and is similarly served to favor and is obtained fine grain product.Wherein hybrid mode is preferably alkaline from the above
Solution B is quickly poured into solution A, beneficial to the sediment for obtaining single dispersing, uniform particle diameter.When by the way of being quickly poured into, its
Speed is added to be generally more than 50mL/min, more preferably above preferably greater than 600ml/ minutes, 1200mL/min.Using the side being added dropwise
During formula, it can be 1-50mL/min that it adds speed.Solution A, alkaline solution B mixing can be carried out at 0~100 DEG C, preferably be existed
Carried out at 25 DEG C of room temperature.Room temperature reaction need not be heated or cooled, beneficial to energy-conservation.Solution A, alkaline solution B incorporation times are 5 minutes
By 24 hours, preferably 10 minutes to 1 hour, reaction was quick, saving of work and time.The volume ratio of the solution A and alkaline solution B can
It is (0.1~10)：1.
By deposit through centrifugation washing, dry after by centrifugation washing and dried process after, calcine under certain condition
Oxide is obtained, by the oxide catalyst that calcining can be stablized.Calcination atmosphere can be static or moving air, preferably
Still air.The temperature of calcining can be 400~600 DEG C, preferably 500 DEG C.Calcination time can be 1~5 hour, and preferably 2 is small
When.Calcining heat is warming up to the speed of 0.5~10 DEG C/min (preferably 1 DEG C/min) during calcining, after insulation a period of time,
Furnace cooling.
The specific surface area that the present invention can obtain the catalyst of preparation of the present invention by BET methods or/instrument is 10-20m2/g。
The present invention is 10-160nm by the catalyst pore size that BJH methods or/instrument can obtain preparation of the present invention.
The pore volume that the present invention can obtain the catalyst of preparation of the present invention by BJH methods or/instrument is 0.05-0.10%.
The preparation method of cheap and simple of the present invention obtains being urged with the base metal base high activity of carbon particle high-efficient contact
Agent, the carbon-smoke combustion CuO catalyst of prepared high activity, has in fields such as motor vehicle (especially diesel vehicle) vent gas treatments
Potential application foreground.
Embodiment is enumerated further below to describe the present invention in detail.It will similarly be understood that following examples are served only for this
Invention is further described, it is impossible to be interpreted as limiting the scope of the invention, those skilled in the art is according to this hair
Some nonessential modifications and adaptations that bright the above is made belong to protection scope of the present invention.Following examples are specific
Technological parameter etc. is also only that an example in OK range, i.e. those skilled in the art can be done properly by the explanation of this paper
In the range of select, and do not really want to be defined in the concrete numerical value of hereafter example.
Embodiment 1
The copper nitrate solution of 7.5mmol is dissolved in 30 milliliters of water and obtains solution A, by 0.03mol NaHCO3It is dissolved into 30 milliliters
Solution B is obtained in water.Under stirring condition, B (adds speed 1800mL/min) in being quickly poured into A, reacts 30 minutes at room temperature.Through
After crossing centrifugation washing and dried process, end-product, the ratio of the end-product are obtained in 500 DEG C of calcining 2h in static atmosphere of air
Surface area is 9m2/ g, pore size is 10-156nm, and pore volume is 0.07cm3/g。
Fig. 1 is the transmission electron microscope of the carbon-smoke combustion CuO catalyst of the high activity obtained by the embodiment of the present invention
(TEM) figure.Visible products therefrom is presented the Nanoparticulate pattern of high dispersive in figure, and diameter is about 40~80nm.This shape
Looks feature is close with carbon particle particle size, is conducive to contact of the carbon particle with catalyst granules, and then promote catalytic performance
Improve；
Fig. 2 is the high-resolution transmission electron microscopy of the carbon-smoke combustion CuO catalyst of the high activity obtained by the embodiment of the present invention
Mirror (HRTEM) figure.The lattice fringe of CuO can be clearly visible in figure, it is shown that good crystallinity；
Fig. 3 is the X ray diffracting spectrum of the carbon-smoke combustion CuO catalyst of the high activity obtained by the embodiment of the present invention.Can in figure
See, reconfirm that products therefrom crystallization is good.
Effect example
To verify the catalytic eliminating effect of the carbon-smoke combustion CuO catalyst to carbon soot particles in exhaust gas from diesel vehicle of high activity of the invention
Really, special simulation exhaust gas from diesel vehicle condition, designs and carries out following experiment in laboratory conditions.
Embodiment 2
Load in fixed bed reactors by the method for embodiment 1 prepare 0.1g high activity carbon-smoke combustion CuO catalyst,
The carbon soot particles of 0.01g, the mixture of 1g quartz sand particles composition, are passed through following gaseous mixture at room temperature：The concentration of NO is
500ppm, O2Concentration be 10 (V) %, N2It is Balance Air, total flow is 0.2L/min.As a comparison, will in another test
The carbon-smoke combustion CuO catalyst removal of the high activity of 0.1g, other conditions are constant.Catalysis in 200-700 DEG C of temperature range of test
As a result agent is listed in Fig. 4 to the changing effect of carbon soot particles, and the catalyst for being prepared using embodiment as can be seen from Figure 4 can be by soot
Particle burns completely below 390 DEG C.Typically, soot conversion ratio reach 90% corresponding temperature can as terminate ignition temperature
Tf, in this example, Tf=390 DEG C, less than 400 DEG C, i.e., the catalyst may be such that carbon soot particles burn in the range of normal exhaust temperature
Completely.
It is visible in sum, the catalyst that the present invention is provided, presentation high-dispersion nano graininess pattern, well-crystallized, and
With catalysis activity well for carbon-smoke combustion.Precipitation method simple economy provided by the present invention, raw material is cheap, with compared with
Versatility high.This catalyst has potential application foreground in terms of the combustion degradation of solid pollutant.
Finally be necessary described herein be：Above example is served only for making further in detail technical scheme
Ground explanation, it is impossible to be interpreted as limiting the scope of the invention, those skilled in the art's the above of the invention
Some the nonessential modifications and adaptations made belong to protection scope of the present invention.
Claims (10)
1. the carbon-smoke combustion CuO catalyst of a kind of high activity, it is characterised in that the carbon-smoke combustion CuO catalyst is nanometer
Granular pattern, particle diameter distribution is 20~100 nm.
2. carbon-smoke combustion CuO catalyst according to claim 1, it is characterised in that the carbon-smoke combustion CuO catalyst
Specific surface area is 10~20 m2/ g, pore size is 10~160 nm, and pore volume is 0.05~0.10 cm3/g。
3. a kind of preparation method of carbon-smoke combustion CuO catalyst as claimed in claim 1 or 2, it is characterised in that by Cu salting liquids
Certain hour is stirred after A and alkaline solution B mixing, then is calcined 1~5 hour at 400~600 DEG C after washing being centrifuged, dries,
Obtain the carbon-smoke combustion CuO catalyst.
4. preparation method according to claim 3, it is characterised in that the Cu salt is the nitrate of Cu, acetate, sulfuric acid
At least one in salt, chloride, the molar concentration of the Cu salting liquids A is 0.01~0.50mol/L.
5. the preparation method according to claim 3 or 4, it is characterised in that solute is bicarbonate in the alkaline solution B
Or/and carbonate, preferably bicarbonate, the concentration of the alkaline solution B is 0.5~5.0 mol/L.
6. the preparation method according to any one of claim 3-5, it is characterised in that the Cu salting liquids A and alkalescence are molten
Liquid B is stirred 5 minutes~24 hours at 0~100 DEG C.
7. the preparation method according to any one of claim 3-6, it is characterised in that the Cu salting liquids A and alkalescence are molten
The volume ratio of liquid B is（0.1~10）：1.
8. the preparation method according to any one of claim 3-7, it is characterised in that the heating rate of the calcining is
0.5~10 DEG C/min, preferably 1 DEG C/min.
9. the preparation method according to any one of claim 3-8, it is characterised in that the Cu salting liquids A and alkalescence are molten
During liquid B hybrid modes are quickly poured into Cu salting liquids A for alkaline solution B, Cu salting liquids A instilled in alkaline solution B or Cu salting liquids
A and alkaline solution B parallel-flow precipitations, preferably alkaline solution B are quickly poured into Cu salting liquids A.
10. application of a kind of carbon-smoke combustion CuO catalyst as claimed in claim 1 or 2 in motor-driven vehicle gas disposal.
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