CN101024182A - Catalyst for eliminating carbon smoke from copper and cerium and preparing method - Google Patents
Catalyst for eliminating carbon smoke from copper and cerium and preparing method Download PDFInfo
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- CN101024182A CN101024182A CNA2007100626123A CN200710062612A CN101024182A CN 101024182 A CN101024182 A CN 101024182A CN A2007100626123 A CNA2007100626123 A CN A2007100626123A CN 200710062612 A CN200710062612 A CN 200710062612A CN 101024182 A CN101024182 A CN 101024182A
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- carbon smoke
- eliminating carbon
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- 239000003054 catalyst Substances 0.000 title claims abstract description 66
- 239000010949 copper Substances 0.000 title claims abstract description 49
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000000779 smoke Substances 0.000 title claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 22
- 229910052802 copper Inorganic materials 0.000 title claims description 22
- 229910052684 Cerium Inorganic materials 0.000 title claims description 17
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 title claims description 17
- 238000000034 method Methods 0.000 title description 2
- 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 39
- 230000003647 oxidation Effects 0.000 claims abstract description 18
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 14
- 150000000703 Cerium Chemical class 0.000 claims abstract description 7
- 239000002562 thickening agent Substances 0.000 claims abstract description 5
- 238000003980 solgel method Methods 0.000 claims abstract description 4
- 239000004071 soot Substances 0.000 claims description 29
- 239000000084 colloidal system Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 6
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 5
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical group [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 206010013786 Dry skin Diseases 0.000 claims description 4
- 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
- 239000008139 complexing agent Substances 0.000 claims description 4
- 229910021591 Copper(I) chloride Inorganic materials 0.000 claims description 3
- SKEYZPJKRDZMJG-UHFFFAOYSA-N cerium copper Chemical compound [Cu].[Ce] SKEYZPJKRDZMJG-UHFFFAOYSA-N 0.000 claims description 3
- OZECDDHOAMNMQI-UHFFFAOYSA-H cerium(3+);trisulfate Chemical compound [Ce+3].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OZECDDHOAMNMQI-UHFFFAOYSA-H 0.000 claims description 3
- 229910000333 cerium(III) sulfate Inorganic materials 0.000 claims description 3
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 claims description 3
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 229910021645 metal ion Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 abstract description 19
- 239000002245 particle Substances 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract 3
- KWOGJMBVSHHNPK-UHFFFAOYSA-N [C].[Ce].[Cu] Chemical compound [C].[Ce].[Cu] KWOGJMBVSHHNPK-UHFFFAOYSA-N 0.000 abstract 1
- 150000001879 copper Chemical class 0.000 abstract 1
- 230000032683 aging Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 239000002131 composite material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000004570 mortar (masonry) Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000007084 catalytic combustion reaction Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000012495 reaction gas Substances 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000002156 mixing Methods 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
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a belongs to exhaust gas catalyst technology area, specially relates to a removable copper cerium carbon smoke catalyst of selective oxidation removing diesel truck exhaust gas carbon smoke and its preparation method. Its characteristic is: used soluble cerium salt and copper salt as raw materials, a certain mole rate citric acid as complexant, a few assemble ethylene glycol as thickener, adjust the different Cu/Ce mole rate, use sol-gel method prepare CuxCe1-xO2-x catalyst, with the catalyst, the carbon smoke temperature can reduced from about 550degree centigrade to 320~420degree centigrade, carbon smoke in the oxygen-enriched atmosphere oxidized to CO2 removing, basically no CO in the products, and has better high temperature steady. Fundamentally the invention satisfied the low temperature require of modern diesel truck exhaust, and greatly increased the burning velocity, the particle trap can quickly rebirth.
Description
Technical field
The invention belongs to the technical field of exhaust gas from diesel vehicle catalyst, particularly be used for a kind of catalyst for eliminating carbon smoke from copper and cerium of diesel vehicle exhaust carbon-smoke selective oxidation removal and preparation method thereof.
Background technology
Diesel engine is a kind of power set that have good dynamic property, economy and endurance quality and be widely used.But the deleterious particle thing of diesel emission is more much higher than gasoline engine, and particularly diameter is that 0.01～10 micron soot particulate has carcinogenesis, the serious threat health, and this has become one of bottleneck that the restriction diesel engine further uses.At present, the particle trap being installed on the diesel exhaust gas pipeline is a kind of effective and economic post-processing technology.It accumulates in soot particle in the diesel exhaust gas in the trap by means such as interception, depositions, after soot accumulation arrives to a certain degree, is removed just so-called regeneration again with means such as burnings.
The exploitation focus of regeneration is a catalytic combustion in recent years.The key factor that influences catalytic regeneration comprises the engagement capacity of redox characteristic, catalyst and the particle of catalyst itself, the performances such as sulfur poisoning-resistant of catalyst.Cerium-based composite oxides can provide Lattice Oxygen to come the oxidation soot as active oxygen species, and utilizes and store oxygen characteristic delivery of supplemental oxygen from air, becomes a class new catalyst of research in recent years.Bibliographical information is for example arranged under catalyst and the loose contact conditions of soot, MnO
x-CeO
2Composite oxides are at 10%O
2/ N
2In temperature (T during the soot peak firing rate
m) be about 550 ℃, at 10%O
2/ 1000ppmNO/N
2Middle T
mBe about 450 ℃.Bibliographical information is also arranged under catalyst and the tight contact conditions of soot, Fe
2O
3-CeO
2Composite oxides are at 6%O
2/ N
2Middle T
mBe 366 ℃, after in 750 ℃ air gas, wearing out 12 hours, T
m110 ℃ have been risen.Therefore develop oxidize soot and remove catalyst for advancing the particle trap to realize that commercialization has great importance with low temperature active, selectivity and heat endurance.
Summary of the invention
The purpose of this invention is to provide a kind of catalyst for eliminating carbon smoke from copper and cerium that is used for the diesel vehicle exhaust carbon-smoke selective oxidation removal and preparation method thereof.The general formula of described cu-ce composite oxidation catalyst is Cu
xCe
1-xO
2-x, x=0.03 ~ 0.2 wherein.
Described cu-ce composite oxidation catalyst adopts the sol-gel process preparation, the steps include:
1) earlier be with cerium copper mol ratio 199: 1 ~ 4: 1 solubility cerium salt and mantoquita mixed dissolution in water, stir;
2) add citric acid as complexing agent, drip molecular weight and be 180 ~ 600 polyethylene glycol as thickener, stir, wherein the gram-equivalent number of citric acid is slightly more than the gram-equivalent number sum of all metal ions, and the polyethylene glycol addition is 5～15wt% of citric acid consumption;
3) 80 ℃ add thermal agitation, produce thick colloid until water evaporates;
4) with colloid 110 ℃ of dryings 12 hours in air atmosphere, porphyrize, 300 ℃ of pre-burnings 1 hour obtain fluffy catalyst fines, and in 700 ℃ of calcinings 3 hours, stove was cold, makes high performance soot low-temperature selective oxidation removal Catalysts Cu again
xCe
1-xO
2-x, the content of copper is 3 ~ 20mol% in the catalyst.
Described cerium salt is cerous nitrate Ce (NO
3)
36H
2O, ammonium ceric nitrate Ce (NH
4)
2(NO
3)
62H
2O, cerous sulfate Ce (SO
4)
24H
2O or cerous chlorate CeCl
37H
2O.
Described mantoquita is copper nitrate Cu (NO
3)
26H
2O, copper sulphate CuSO
45H
2O or copper chloride CuCl
22H
2O.
The invention has the beneficial effects as follows: adopting base metals such as cheap copper nitrate, cerous nitrate is raw material, and the Catalyst Production cost is low; Adopt the technology of each catalyst of sol-gel legal system simple, course of reaction is controlled easily, realizes suitability for industrialized production easily; The Catalysts Cu that makes
xCe
1-xO
2-xCan with the carbon-smoke combustion of collecting on the particle trap CO
2Temperature be reduced in the temperature range of exhaust gas from diesel vehicle.In the presence of this catalyst, with the simulation exhaust gas from diesel vehicle is combustion atmosphere, the ignition temperature of soot can be reduced to 320 ~ 420 ℃ by about 550 ℃, has satisfied the low temperature requirement of modern diesel engine truck exhaust basically, and burning velocity accelerates greatly, and the particle trap can be regenerated rapidly.This catalyst has the heat endurance at 800 ℃.
Description of drawings
Fig. 1 is not for adding the soot temperature programmed oxidation curve of catalyst.Abscissa is a reaction temperature among the figure, and ordinate is CO in giving vent to anger or CO
2The concentration of product, reaction condition are 10%O
2Or (10%O
2+ 1000ppmNO), balance gas is N
2, air speed is 40000h
-1
Fig. 2 is the Cu of case study on implementation 1
0.1Ce
0.9O
1.9The soot temperature programmed oxidation curve of catalyst, catalyst and soot mixture carefully grind 10min with pestle in mortar, reach the closely effect of contact of catalyst-soot.Abscissa is a reaction temperature among the figure, and ordinate is the middle CO that gives vent to anger
2The concentration of product, reaction condition are 10%O
2Or (10%O
2+ 1000ppmNO), balance gas is N
2, air speed is 40000h
-1
Fig. 3 is the Cu of case study on implementation 1
0.1Ce
0.9O
1.9The soot temperature programmed oxidation curve of catalyst, catalyst and soot mixture with spoon drawout 5min gently, reach the effect of the loose contact of catalyst-soot in mortar.Abscissa is a reaction temperature among the figure, and ordinate is the middle CO that gives vent to anger
2The concentration of product, reaction condition are 10%O
2Or (10%O
2+ 1000ppmNO), balance gas is N
2, air speed is 40000h
-1
Fig. 4 is the Cu of case study on implementation 2
0.2Ce
0.8O
1.8The soot temperature programmed oxidation curve of catalyst, catalyst and soot mixture with spoon drawout 5min gently, reach the effect of the loose contact of catalyst-soot in mortar.Abscissa is a reaction temperature among the figure, and ordinate is the middle CO that gives vent to anger
2The concentration of product, reaction condition are 10%O
2+ 1000ppmNO, balance gas are N
2, air speed is 40000h
-1
The specific embodiment
The present invention is a kind of catalyst for eliminating carbon smoke from copper and cerium and preparation force method thereof.Described catalyst for eliminating carbon smoke from copper and cerium is a cu-ce composite oxidation catalyst, and its general formula is Cu
xCe
1-xO
2-x, x=0.03 in the formula ~ 0.2.
Described catalyst for eliminating carbon smoke from copper and cerium adopts the sol-gel process preparation, the steps include:
1) earlier be with cerium copper mol ratio 199: 1 ~ 4: 1 solubility cerium salt and mantoquita mixed dissolution in water, stir;
2) add citric acid as complexing agent, drip polyethylene glycol (molecular weight ranges 180 ~ 600) as thickener, stir, wherein the gram-equivalent number of citric acid is slightly more than the gram-equivalent number sum of all metal ions, and the polyethylene glycol addition is 5 ~ 15wt% of citric acid consumption;
3) 80 ℃ add thermal agitation, produce thick colloid until water evaporates;
4) with colloid 110 ℃ of dryings 12 hours in air atmosphere, porphyrize, 300 ℃ of pre-burnings 1 hour obtain fluffy catalyst powder art, and in 700 ℃ of calcinings 3 hours, stove was cold, makes high performance soot low-temperature selective oxidation removal Catalysts Cu again
xCe
1-xO
2-x, the content of copper is 0.5 ~ 20mol% in the catalyst.
Described cerium salt is cerous nitrate Ce (NO
3)
36H
2O, ammonium ceric nitrate Ce (NH
4)
2(NO
3)
62H
2O, cerous sulfate Ce (SO
4)
24H
2O or cerous chlorate CeCl
37H
2O, described mantoquita are copper nitrate Cu (NO
3)
26H
2O, copper sulphate CuSO
45H
2O or copper chloride CuCl
22H
2O.
Exemplifying embodiment is below illustrated the present invention.
The water that in the beaker of 200ml, adds 7.462g cerous nitrate, 0.462g copper nitrate and 60ml, stirring and dissolving, under room temperature and stirring condition, add the 5.393g citric acid then, drip 0.5ml polyethylene glycol (molecular weight 400) after the dissolving again, after dropwising, add thermal agitation at 80 ℃, produce thick colloid until water evaporates.With the colloid of gained 11O ℃ of drying 12 hours in air atmosphere, take out porphyrize then, through 300 ℃ of pre-burnings 1 hour, 500 ℃ of calcinings 3 hours made catalyst after stove is cold, are abbreviated as Cu
0.1Ce
0.9O
1.9The content of copper is 10mol% in this catalyst.
The water that in the beaker of 200ml, adds 14.427g ammonium ceric nitrate, 1.589g copper nitrate and 100ml, stirring and dissolving, under room temperature and stirring condition, add the 10.138g citric acid then, drip 1.0ml polyethylene glycol (molecular weight 200) after the dissolving again, after dropwising, add thermal agitation at 80 ℃, produce thick colloid until water evaporates.With the colloid of gained 110 ℃ of dryings 12 hours in air atmosphere, take out porphyrize then, through 300 ℃ of pre-burnings 1 hour, 500 ℃ of calcinings 3 hours made catalyst after stove is cold, are abbreviated as Cu
0.2Ce
0.8O
1.8The content of copper is 20mol% in this catalyst.
Cu with embodiment 1
0.1Ce
0.9O
1.9Catalyst is an example, is fresh sample with the sample that has just made, and is to wear out sample with the sample of 800 ℃ of calcining 20h in moving air, carries out the test of soot catalytic combustion activity in the atmosphere of simulation exhaust gas from diesel vehicle.
As blank result, (Printex-U Degussa) is contained in and carries out temperature programmed oxidation (TPO) experiment in the quartz tube reactor, and the result as shown in Figure 1 to get the 10mg soot.At 10%O
2, balance gas is N
2, air speed is 40000h
-1The time, the T of pure carbon cigarette
mBe about 546 ℃, generate CO in the product
2Selectivity have only 16%; After adding 1000ppmNO in the reaction gas, T
mBe about 529 ℃, selectivity is 24%.
Get 100mgCu
0.1Ce
0.9O
1.9(embodiment 1) catalyst, (Printex-U Degussa) after the mixing, adopts pestle carefully to grind 15min at mortar, mixture is contained in carries out temperature programmed oxidation (TPO) experiment in the quartz tube reactor, and the result as shown in Figure 2 with the 10mg soot.At 10%O
2, balance gas is N
2, air speed is 40000h
-1The time, fresh Cu
0.1Ce
0.9O
1.9T
mBe about 324 ℃, the situation during than catalyst-free has reduced about 222 ℃, aging back T
mBe about 378 ℃, before aging, risen 54 ℃; After adding 1000ppmNO in the reaction gas, T
mBe about 321 ℃, the situation during than catalyst-free has reduced about 208 ℃, aging back T
mBe about 345 ℃, before aging, risen 24 ℃.Use Cu
0.1Ce
0.9O
1.9Catalyst generates CO
2Selectivity near 100%.
Cu with embodiment 1
0.1Ce
0.9O
1.9Catalyst is an example, is fresh sample with the sample that has just made, and is to wear out sample with the sample of 800 ℃ of calcining 20h in moving air, carries out the test of soot catalytic combustion activity in the atmosphere of simulation exhaust gas from diesel vehicle.
Get 100mg Cu
0.1Ce
0.9O
1.9(embodiment 1) catalyst, with the 10mg soot (Printex-U, Degussa) mix after, adopt spoon at mortar drawout 15min gently, mixture is contained in carries out temperature programmed oxidation (TPO) experiment in the quartz tube reactor, the result is as shown in Figure 3.At 10%O
2, balance gas is N
2, air speed is 40000h
-1The time, fresh Cu
0.1Ce
0.9O
1.9T
mBe about 496 ℃, the situation during than catalyst-free has reduced about 50 ℃, aging back T
mBe about 519 ℃, before aging, risen 23 ℃; After adding 1000ppmNO in the reaction gas, T
mBe about 419 ℃, the situation during than catalyst-free has reduced about 110 ℃, aging back T
mBe about 465 ℃, before aging, risen 46 ℃.Use Cu
0.1Ce
0.9O
1.9Catalyst generates CO
2Selectivity near 100%.
Cu with embodiment 2
0.2Ce
0.8O
1.8Catalyst is an example, is fresh sample with the sample that has just made, and is to wear out sample with the sample of 800 ℃ of calcining 20h in moving air, carries out the test of soot catalytic combustion activity in the atmosphere of simulation exhaust gas from diesel vehicle.
Get 100mg Cu
0.2Ce
0.8O
1.8(embodiment 2) catalyst, with the 10mg soot (Printex-U, Degussa) mix after, adopt spoon at mortar drawout 15min gently, mixture is contained in carries out temperature programmed oxidation (TPO) experiment in the quartz tube reactor, the result is as shown in Figure 4.At 10%O
2+ 1000ppmNO, balance gas are N
2, air speed is 40000h
-1The time, fresh Cu
0.2Ce
0.8O
1.8T
mBe about 453 ℃, the situation during than catalyst-free has reduced about 76 ℃, aging back T
mBe about 473 ℃, before aging, risen 20 ℃.Use Cu
0.2Ce
0.8O
1.8Catalyst generates CO
2Selectivity near 100%.
Claims (7)
1. a catalyst for eliminating carbon smoke from copper and cerium is characterized in that, the general formula of described catalyst for eliminating carbon smoke from copper and cerium is Cu
xCe
1-xO
2-xX=0.03 in the formula～0.2.
2. the preparation method of a catalyst for eliminating carbon smoke from copper and cerium is characterized in that, described catalyst for eliminating carbon smoke from copper and cerium adopts the sol-gel process preparation, the steps include:
1) earlier be with cerium copper mol ratio 199: 1～4: 1 solubility cerium salt and mantoquita mixed dissolution in water, stir;
2) add citric acid as complexing agent, drip molecular weight and be 180～600 polyethylene glycol, stir as thickener;
3) 80 ℃ add thermal agitation, produce thick colloid until water evaporates;
4) with colloid 110 ℃ of dryings 12 hours in air atmosphere, porphyrize, 300 ℃ of pre-burnings 1 hour obtain fluffy catalyst fines, and in 700 ℃ of calcinings 3 hours, stove was cold, makes high performance soot low-temperature selective oxidation removal Catalysts Cu again
xCe
1-xO
2-x, the content of copper is 3～20mol% in the catalyst.
3. according to the preparation method of the described catalyst for eliminating carbon smoke from copper and cerium of claim 2, it is characterized in that described cerium salt is cerous nitrate Ce (NO
3)
36H
2O, ammonium ceric nitrate Ce (NH
1)
2(NO
3)
62H
2O, cerous sulfate Ce (SO
4)
24H
2O or cerous chlorate CeCl
37H
2O.
4. according to the preparation method of the described catalyst for eliminating carbon smoke from copper and cerium of claim 2, it is characterized in that described mantoquita is copper nitrate Cu (NO
3)
26H
2O, copper sulphate CuSO
45H
2O or copper chloride CuCl
22H
2O.
5. according to the preparation method of the described catalyst for eliminating carbon smoke from copper and cerium of claim 2, it is characterized in that the content of copper is 3～20mol% in the described catalyst.
6. according to the preparation method of the described catalyst for eliminating carbon smoke from copper and cerium of claim 2, it is characterized in that the consumption of described complexing agent citric acid is: the gram-equivalent number (C of citric acid
6H
8O
7H
2O): the gram-equivalent number sum (3Ce of metal ion
3++ 2Cu
2+Or 4Ce
4++ 2Cu
2+)=1.1: 1.
7. according to the preparation method of the described catalyst for eliminating carbon smoke from copper and cerium of claim 2, it is characterized in that the addition of described thickener polyethylene glycol is 5～15wt.% of citric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100626123A CN100518931C (en) | 2007-01-11 | 2007-01-11 | Catalyst for eliminating carbon smoke from copper and cerium and preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100626123A CN100518931C (en) | 2007-01-11 | 2007-01-11 | Catalyst for eliminating carbon smoke from copper and cerium and preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101024182A true CN101024182A (en) | 2007-08-29 |
| CN100518931C CN100518931C (en) | 2009-07-29 |
Family
ID=38743006
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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|---|---|
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101623639B (en) * | 2009-08-11 | 2011-09-14 | 清华大学 | Barium-transition metal-cerium base oxide catalyst for eliminating carbon smoke |
| CN102658122A (en) * | 2012-02-22 | 2012-09-12 | 华东理工大学 | Catalyst for combustion of soot particles in diesel vehicle exhaust, and preparation method thereof |
| CN104028275A (en) * | 2014-06-10 | 2014-09-10 | 浙江大学 | Cerium-copper composite oxide catalyst for SO3 catalytic decomposition and preparation method of cerium-copper composite oxide catalyst |
| CN104492447A (en) * | 2014-12-24 | 2015-04-08 | 上海应用技术学院 | Copper doped cerium oxide photocatalyst and preparation method thereof |
| US9662636B2 (en) | 2014-04-17 | 2017-05-30 | Basf Corporation | Zoned catalyst composites |
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