CN109675556A - A kind of ruthenium catalyst and preparation method thereof for propane catalysis burning - Google Patents
A kind of ruthenium catalyst and preparation method thereof for propane catalysis burning Download PDFInfo
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- CN109675556A CN109675556A CN201910006934.9A CN201910006934A CN109675556A CN 109675556 A CN109675556 A CN 109675556A CN 201910006934 A CN201910006934 A CN 201910006934A CN 109675556 A CN109675556 A CN 109675556A
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- propane
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- cerium oxide
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000003054 catalyst Substances 0.000 title claims abstract description 63
- 239000001294 propane Substances 0.000 title claims abstract description 53
- 229910052707 ruthenium Inorganic materials 0.000 title claims abstract description 36
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000006555 catalytic reaction Methods 0.000 title claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- 229910000420 cerium oxide Inorganic materials 0.000 claims abstract description 24
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000003647 oxidation Effects 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 5
- 230000002779 inactivation Effects 0.000 claims abstract description 3
- 239000006227 byproduct Substances 0.000 claims abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 51
- 238000003756 stirring Methods 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 229910001868 water Inorganic materials 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 238000002425 crystallisation Methods 0.000 claims description 8
- 230000008025 crystallization Effects 0.000 claims description 8
- 238000004090 dissolution Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000012265 solid product Substances 0.000 claims description 8
- 229910052684 Cerium Inorganic materials 0.000 claims description 6
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910019891 RuCl3 Inorganic materials 0.000 claims description 2
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 2
- SQKWGPOIVHMUNF-UHFFFAOYSA-K cerium(3+);trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Cl-].[Ce+3] SQKWGPOIVHMUNF-UHFFFAOYSA-K 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 2
- 238000000643 oven drying Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 239000012695 Ce precursor Substances 0.000 claims 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 239000000047 product Substances 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 239000003643 water by type Substances 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000007800 oxidant agent Substances 0.000 description 8
- 230000001590 oxidative effect Effects 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 229910002492 Ce(NO3)3·6H2O Inorganic materials 0.000 description 6
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 6
- 230000004913 activation Effects 0.000 description 6
- 238000005119 centrifugation Methods 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 238000007084 catalytic combustion reaction Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000002073 nanorod Substances 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229910002788 Ru-CeO2 Inorganic materials 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 230000007547 defect Effects 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
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- -1 is 2000ppm Substances 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals with rare earths or actinides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- 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
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
Abstract
The present invention relates to a kind of ruthenium catalysts and preparation method thereof for propane catalysis burning.For catalyst using rodlike cerium oxide as carrier, noble ruthenium is active component.It is characterized in that, the catalyst can be by propane complete catalysts oxidation at H at a temperature of 150 DEG C ~ 240 DEG C2O and CO2, no other by-products generate, and successive reaction 60h at a temperature of 190 DEG C, no catalyst inactivation.Catalyst of the invention has many advantages, such as that preparation method is simple, activity is high, no coupling product and stability are good.
Description
Technical field
The present invention relates to a kind of preparation method and applications of ruthenium catalyst for propane catalysis burning, belong to environment dirt
Contaminate improvement field.
Background technique
Largely used in industrial production and daily work, led to propane and butane etc. as fuel in liquefied petroleum gas
The discharge amount of low-carbon alkanes is also growing, is caused more to human health environment to seriously threaten, therefore how to control and eliminate
Low-carbon alkanes discharge also becomes one of the hot spot of environmental area research.Catalytic combustion method has purification efficiency high, handles exhaust gas
The advantages that concentration is wide, without secondary pollution, is control and one of the most effectual way for eliminating low-carbon alkanes discharge, and core is design
With prepare high performance catalyst.
In the catalytic combustion technology of propane, the most commonly used is the noble metal catalysts such as support type Pt and Pd.Although this two
Kind noble metal has the absorption of preferable propane and activation capacity, but the complete conversion temperature of propane is usually above in laboratory conditions
300 DEG C, existing catalyst is unable to satisfy the requirement of propane low-temperature activation and conversion.In propane catalyst combustion reaction, propane point
Absorption and activation of the son on metal active site are crucial, i.e., first c h bond fractures in molecule.Our bases in the present invention
There is the characteristic more appraised at the current rate in noble metal Ru, by optimizing CeO2Carrier pattern, in CeO2The building of nanometer rods carrier surface is strong to inhale
Echo the RuO of activation c h bondxSpecies, while increasing Ru-CeO2The defect bit quantity at interface improves the mobility of O, promotes C-H
The oxidation and conversion of intermediate species, realize propane low-temperature activation and conversion after bond activation.Work as reaction condition are as follows: be with concentration
20000ppm oxygen is oxidant, and the concentration of propane is 2000ppm, air speed 30000mL/hgcat, reaction pressure is
When 0.1MPa, the complete conversion temperature of propane drops to 183 DEG C.
If using CeO2It is under Ru content same case and identical when nanocube and octahedron are carrier
Under reaction condition, the complete conversion temperature of propane is respectively 200 and 220 DEG C, illustrates that its activity is substantially less than CeO2Nanometer rods load
Ru catalyst.
Summary of the invention
The purpose of the present invention is the catalysis burning for propane, provide a kind of with low temperature high activity and reaction stability
High performance catalyst and preparation method thereof.Its core is to prepare the CeO with nanometer rods pattern2Carrier passes through carrier special form
The building of looks, the Ru catalyst for loading it show excellent propane combustion activity, and performance is better than current industrial applications
Pt and Pd catalyst.
Technical solution of the present invention:
The present invention relates to a kind of ruthenium catalysts for propane catalysis burning, and using rodlike cerium oxide as carrier, noble ruthenium is to live
Property component.The catalyst of preparation can be by propane complete catalysts oxidation at H at a temperature of 150 DEG C ~ 240 DEG C2O and CO2, Er Qie
Successive reaction 60h no catalyst inactivation at a temperature of 190 DEG C.Catalyst of the invention has simple preparation method, activity height, without pair
The advantages that product and good stability.
The mass ratio of noble ruthenium and rodlike cerium oxide is 0.5-5%, preferably 2%.
The preparation method of the rodlike cerium oxide carrier in the present invention, is prepared using hydro-thermal method, comprising the following steps:
A certain amount of cerium source and alkali source are dissolved in respectively in a certain amount of deionized water, mixed after completely dissolution to the two, and is stirred certain
Time.Then the solution mixed is transferred in crystallizing kettle, at a certain temperature crystallization, obtains rodlike cerium oxide precursor body.
Then for several times by obtained solid product centrifuge washing, dry 2-48h is placed in 50-180 DEG C of baking oven, finally at 400-600 DEG C
2-6h is roasted in lower air atmosphere to get rodlike cerium oxide carrier is arrived, and is labeled as CeO2。
The cerium source is one of six nitric hydrate ceriums, Cerium trichloride hexahydrate, preferably six hydration nitre in the present invention
Sour cerium.
The alkali source is one of sodium hydroxide, potassium hydroxide, preferably sodium hydroxide in the present invention.
The preparation method of the ruthenium catalyst in the present invention, is prepared using deposition-precipitation method, comprising the following steps: first
By a certain amount of CeO2Powder, deionized water and RuCl3Aqueous solution is mixed in three-necked flask, continues to stir at room temperature,
It mixes them thoroughly.Then in room temperature and under being stirred continuously, certain density NaOH solution is added dropwise in mixture, is controlled
Terminal pH value processed is 7-10.Continue stirring after a certain period of time, solid sample is obtained by centrifuge washing.It will finally obtain
Sample is placed in 50-100 DEG C of oven drying 2-48h, then in 300-500 DEG C of roasting 1-5 h in a certain concentration hydrogen atmosphere.
The invention further relates to the purposes of above-mentioned catalyst, can be used for propane catalyst combustion reaction, realize propane pollutant
Control and elimination.
Detailed description of the invention:
Fig. 1 is influence of the amount of load ruthenium to propane catalytic combustion activity.
Fig. 2 is influence of the different carriers maturing temperature to propane catalytic combustion activity.
Fig. 3 is influence of the different carriers pattern to propane catalytic combustion activity.
Fig. 4 is service life of the high performance catalyst in propane catalyst combustion reaction.
Specific implementation method
For a better understanding of the present invention, the content that the present invention is further explained combined with specific embodiments below.
Embodiment 1:
A kind of ruthenium catalyst and preparation method thereof for propane catalysis burning, comprising the following steps:
By 1.736 g Ce (NO3)3·6H2O and 19.2 g NaOH are dissolved separately in 10 mL and 70 mL deionized waters.To
The two mixes after completely dissolution, and stirs 30 min.Then the solution mixed is transferred in 100ml crystallizing kettle, is placed in 100
Crystallization for 24 hours, obtains cerium oxide nano-rod presoma at DEG C.Then by solid product use deionized water and ethyl alcohol to be centrifuged respectively
Washing for several times, is placed in 80 DEG C of baking ovens dry 8h, roasts 4h at 400 DEG C finally to get nano bar-shape cerium oxide carrier is arrived,
Labeled as CeO2-1。
First by 1 g CeO2The RuCl of -1 powder, 50 ml deionized waters and 0.6g3(0.86%) aqueous solution is in three-necked flask
It is mixed, and continues to stir 15 min at room temperature, mixed them thoroughly.It then, will under the conditions of room temperature is with being stirred continuously
The NaOH solution (0.01 mol/L) of fresh configuration is added dropwise in mixture, and control terminal pH value is about 8.Continue to stir
After mixing 3 h, obtains solid sample by centrifugation and spend sub- water and repeatedly wash to remove remaining Na+And Cl-Ion.Finally incite somebody to action
To sample be placed in 60 DEG C of oven dried overnights, then in 10% H2It is roasted at/Ar mixed atmosphere (40 ml/min) and 400 DEG C
1 h is burnt, ruthenium catalyst can be obtained, is labeled as 0.5%Ru/CeO2-1。
Catalyst after roasting is subjected to propane activity rating in fixed-bed micro-reactor (internal diameter 6mm).Catalyst
Dosage is 0.1g, and temperature is automatically controlled using K-type thermocouple.It is 20000ppm oxygen as oxidant using concentration, the concentration of propane
For 2000ppm, air speed 30000mL/hgcat, reaction pressure 0.1MPa.Test result shows that product only has titanium dioxide
Carbon, the complete conversion temperature of propane are 235oC。
Embodiment 2:
A kind of ruthenium catalyst and preparation method thereof for propane catalysis burning, comprising the following steps:
By 1.736 g Ce (NO3)3·6H2O and 19.2 g NaOH are dissolved separately in 10 mL and 70 mL deionized waters.To
The two mixes after completely dissolution, and stirs 30 min.Then the solution mixed is transferred in 100ml crystallizing kettle, is placed in 100
Crystallization for 24 hours, obtains cerium oxide nano-rod presoma at DEG C.Then by solid product use deionized water and ethyl alcohol to be centrifuged respectively
Washing for several times, is placed in 80 DEG C of baking ovens dry 8h, roasts 4h at 400 DEG C finally to get nano bar-shape cerium oxide carrying is arrived
Body is labeled as CeO2-1。
First by 1 g CeO2The RuCl of -1 powder, 50 ml deionized waters and 1.2g3(0.86%) aqueous solution is in three-necked flask
It is mixed, and continues to stir 15 min at room temperature, mixed them thoroughly.It then, will under the conditions of room temperature is with being stirred continuously
The NaOH solution (0.01 mol/L) of fresh configuration is added dropwise in mixture, and control terminal pH value is about 8.Continue to stir
After mixing 3 h, obtains solid sample by centrifugation and spend sub- water and repeatedly wash to remove remaining Na+And Cl-Ion.Finally incite somebody to action
To sample be placed in 60 DEG C of oven dried overnights, then in 10% H2It is roasted at/Ar mixed atmosphere (40 ml/min) and 400 DEG C
1 h, can be obtained ruthenium catalyst, be labeled as 1%Ru/CeO2-1。
Catalyst after roasting is subjected to propane activity rating in fixed-bed micro-reactor (internal diameter 6mm).Catalyst
Dosage is 0.1g, and temperature is automatically controlled using K-type thermocouple.It is 20000ppm oxygen as oxidant using concentration, the concentration of propane
For 2000ppm, air speed 30000mL/hgcat, reaction pressure 0.1MPa.Test result shows that product only has titanium dioxide
Carbon, the complete conversion temperature of propane are 209oC。
Embodiment 3:
A kind of ruthenium catalyst and preparation method thereof for propane catalysis burning, comprising the following steps:
By 1.736 g Ce (NO3)3·6H2O and 19.2 g NaOH are dissolved separately in 10 mL and 70 mL deionized waters.To
The two mixes after completely dissolution, and stirs 30 min.Then the solution mixed is transferred in 100ml crystallizing kettle, is placed in 100
Crystallization for 24 hours, obtains cerium oxide nano-rod presoma at DEG C.Then by solid product use deionized water and ethyl alcohol to be centrifuged respectively
Washing for several times, is placed in 80 DEG C of baking ovens dry 8h, roasts 4h at 400 DEG C finally to get nano bar-shape cerium oxide carrier is arrived,
Labeled as CeO2-1。
First by 1 g CeO2The RuCl of -1 powder, 50 ml deionized waters and 2.4g3(0.86%) aqueous solution is in three-necked flask
It is mixed, and continues to stir 15 min at room temperature, mixed them thoroughly.It then, will under the conditions of room temperature is with being stirred continuously
The NaOH solution (0.01 mol/L) of fresh configuration is added dropwise in mixture, and control terminal pH value is about 8.Continue to stir
After mixing 3 h, obtains solid sample by centrifugation and spend sub- water and repeatedly wash to remove remaining Na+And Cl-Ion.Finally incite somebody to action
To sample be placed in 60 DEG C of oven dried overnights, then in 10% H2It is roasted at/Ar mixed atmosphere (40 ml/min) and 400 DEG C
1 h, can be obtained ruthenium catalyst, be labeled as 2%Ru/CeO2-1。
Catalyst after roasting is subjected to propane activity rating in fixed-bed micro-reactor (internal diameter 6mm).Catalyst
Dosage is 0.1g, and temperature is automatically controlled using K-type thermocouple.It is 20000ppm oxygen as oxidant using concentration, the concentration of propane
For 2000ppm, air speed 30000mL/hgcat, reaction pressure 0.1MPa.Test result shows that product only has titanium dioxide
Carbon, the complete conversion temperature of propane are 183oC。
Embodiment 4:
A kind of ruthenium catalyst and preparation method thereof for propane catalysis burning, comprising the following steps:
By 1.736 g Ce (NO3)3·6H2O and 19.2 g NaOH are dissolved separately in 10 mL and 70 mL deionized waters.To
The two mixes after completely dissolution, and stirs 30 min.Then the solution mixed is transferred in 100ml crystallizing kettle, is placed in 100
Crystallization 2h at DEG C obtains cerium oxide nano-rod presoma.Then by solid product use deionized water and ethyl alcohol to be centrifuged respectively
Washing for several times, is placed in 80 DEG C of baking ovens dry 8h, roasts 4h at 500 DEG C finally to get nano bar-shape cerium oxide carrier is arrived,
Labeled as CeO2-2。
First by 1 g CeO2The RuCl of -2 powder, 50 ml deionized waters and 2.4g3(0.86%) aqueous solution is in three-necked flask
It is mixed, and continues to stir 15 min at room temperature, mixed them thoroughly.It then, will under the conditions of room temperature is with being stirred continuously
The NaOH solution (0.01 mol/L) of fresh configuration is added dropwise in mixture, and control terminal pH value is about 8.Continue to stir
After mixing 3 h, obtains solid sample by centrifugation and spend sub- water and repeatedly wash to remove remaining Na+And Cl-Ion.Finally incite somebody to action
To sample be placed in 60 DEG C of oven dried overnights, then in 10% H2It is roasted at/Ar mixed atmosphere (40 ml/min) and 400 DEG C
1 h is burnt, ruthenium catalyst can be obtained, is labeled as 2%Ru/CeO2-2。
Catalyst after roasting is subjected to propane activity rating in fixed-bed micro-reactor (internal diameter 6mm).Catalyst
Dosage is 0.1g, and temperature is automatically controlled using K-type thermocouple.It is 20000ppm oxygen as oxidant using concentration, the concentration of propane
For 2000ppm, air speed 30000mL/hgcat, reaction pressure 0.1MPa.Test result shows that product only has titanium dioxide
Carbon, the complete conversion temperature of propane are 185oC。
Embodiment 5:
A kind of ruthenium catalyst and preparation method thereof for propane catalysis burning, comprising the following steps:
By 1.736 g Ce (NO3)3·6H2O and 19.2 g NaOH are dissolved separately in 10 mL and 70 mL deionized waters.To
The two mixes after completely dissolution, and stirs 30 min.Then the solution mixed is transferred in 100ml crystallizing kettle, is placed in 180
Crystallization for 24 hours, obtains cerium oxide nano cube presoma at DEG C.Then by solid product use deionized water and ethyl alcohol respectively
Centrifuge washing for several times, is placed in 80 DEG C of baking ovens dry 8h, finally roasts 4h at 400 DEG C and aoxidizes to get to nanocube
Cerium carrier is labeled as CeO2-C。
First by 1 g CeO2The RuCl of-C powder, 50 ml deionized waters and 2.4g3(0.86%) aqueous solution is in three-necked flask
It is mixed, and continues to stir 15 min at room temperature, mixed them thoroughly.It then, will under the conditions of room temperature is with being stirred continuously
The NaOH solution (0.01 mol/L) of fresh configuration is added dropwise in mixture, and control terminal pH value is about 8.Continue to stir
After mixing 3 h, obtains solid sample by centrifugation and spend sub- water and repeatedly wash to remove remaining Na+And Cl-Ion.Finally incite somebody to action
To sample be placed in 60 DEG C of oven dried overnights, then in 10% H2It is roasted at/Ar mixed atmosphere (40 ml/min) and 400 DEG C
Cerium oxide supported ruthenium catalyst can be obtained in 1 h, is labeled as 2%Ru/CeO2-C。
Catalyst after roasting is subjected to propane activity rating in fixed-bed micro-reactor (internal diameter 6mm).Catalyst
Dosage is 0.1g, and temperature is automatically controlled using K-type thermocouple.It is 20000ppm oxygen as oxidant using concentration, the concentration of propane
For 2000ppm, air speed 30000mL/hgcat, reaction pressure 0.1MPa.Test result shows that product only has titanium dioxide
Carbon, the complete conversion temperature of propane are 200oC。
Embodiment 6:
A kind of cerium oxide supported ruthenium catalyst and preparation method thereof for propane catalysis burning, comprising the following steps:
By 0.858 g Ce (NO3)3·6H2O and 0.0076 g Na3PO4 12H2O be dissolved separately in 10 mL and 70 mL go from
In sub- water.It is mixed after completely dissolution to the two, and stirs 30 min.Then the solution mixed is transferred to 100ml crystallizing kettle
In, it is placed in crystallization 10h at 170 DEG C, obtains cerium oxide nano octahedron presoma.Then by solid product spend respectively from
Sub- water and ethyl alcohol centrifuge washing for several times, are placed in 80 DEG C of baking ovens dry 8h, roast 4h at 400 DEG C finally to get nanometer is arrived
Octahedra cerium oxide carrier is labeled as CeO2-O。
First by 1 g CeO2The RuCl of-O powder, 50 ml deionized waters and 2.4g3(0.86%) aqueous solution is in three-necked flask
It is mixed, and continues to stir 15 min at room temperature, mixed them thoroughly.It then, will under the conditions of room temperature is with being stirred continuously
The NaOH solution (0.01 mol/L) of fresh configuration is added dropwise in mixture, and control terminal pH value is about 8.Continue to stir
After mixing 3 h, obtains solid sample by centrifugation and spend sub- water and repeatedly wash to remove remaining Na+And Cl-Ion.Finally incite somebody to action
To sample be placed in 60 DEG C of oven dried overnights, then in 10% H2It is roasted at/Ar mixed atmosphere (40 ml/min) and 400 DEG C
1 h, can be obtained ruthenium catalyst, be labeled as 2%Ru/CeO2-O。
Catalyst after roasting is subjected to propane activity rating in fixed-bed micro-reactor (internal diameter 6mm).Catalyst
Dosage is 0.1g, and temperature is automatically controlled using K-type thermocouple.It is 20000ppm oxygen as oxidant using concentration, the concentration of propane
For 2000ppm, air speed 30000mL/hgcat, reaction pressure 0.1MPa.Test result shows that product only has titanium dioxide
Carbon, the complete conversion temperature of propane are 220oC。
Embodiment 7:
2%Ru/CeO prepared by 0.1g embodiment 32- 1 catalyst is placed in quartz fixed bed reactor, is with concentration
20000ppm oxygen is oxidant, is 2000ppm, air speed 30000mL/hg in the concentration of propanecat, pressure 0.1MPa,
Reaction temperature is 190 oCUnder conditions of surely comment 60h, investigate 2%Ru/CeO2The stability of -1 catalyst, the experimental results showed that, third
The conversion ratio of alkane catalyst combustion reaction maintains always 95%, has excellent stability.
Above content is only the basic explanation under present inventive concept, and that technical solution according to the present invention is done is any etc.
Effect transformation, is protection scope of the present invention.
Claims (7)
1. a kind of cerium oxide supported ruthenium catalyst for propane catalysis burning, which is characterized in that catalyst is with rodlike cerium oxide
For carrier, noble ruthenium is active component, and catalyst can be at a lower temperature by propane complete catalysts oxidation at H2O and
CO2。
2. rodlike cerium oxide carrier according to claim 1, it is characterized in that being prepared using hydro-thermal method, comprising the following steps:
A) cerium source and alkali source are dissolved in a certain amount of deionized water respectively in proportion, are mixed after completely dissolution to the two, and stirred certain
Time；B) solution mixed is transferred in crystallizing kettle, is placed in crystallization certain time under certain temperature, obtain rodlike oxidation
Cerium precursor；C) for several times by obtained solid product centrifuge washing, dry 2-48h is placed in 50-180 DEG C of baking oven, finally in sky
2-6h is roasted in gas to get rodlike CeO is arrived2Carrier is labeled as CeO2。
3. the preparation method of carrier according to claim 2, which is characterized in that the cerium source be six nitric hydrate ceriums,
One of Cerium trichloride hexahydrate, preferably six nitric hydrate ceriums.
4. the preparation method of carrier according to claim 2, which is characterized in that the alkali source is sodium hydroxide, hydrogen-oxygen
Change one of potassium, preferably sodium hydroxide.
5. ruthenium catalyst according to claim 1, it is characterized in that being prepared using deposition-precipitation method, comprising the following steps: a)
By a certain amount of rodlike CeO2Powder, deionized water and RuCl3Aqueous solution is mixed in three-necked flask, is stirred at room temperature
Certain time mixes them thoroughly；B) under the conditions of room temperature is stirred continuously, by the certain density NaOH solution of fresh configuration
It is added dropwise in mixture, control terminal pH value is 7-10；C) continue after stirring 2-6h, by being centrifuged and washing is consolidated
Body sample；D) sample obtained is placed in 50-100 DEG C of oven drying 2-48h, then the 300- in certain density hydrogen atmosphere
500 DEG C of roasting 1-5 h are labeled as Ru/CeO to get cerium oxide supported ruthenium catalyst is arrived2。
6. the preparation method of ruthenium catalyst according to claim 5, which is characterized in that noble ruthenium and carrier cerium oxide
Mass ratio is 0.5-5%, preferably 2%.
7. catalyst according to claim 1, which is characterized in that there is no by-product generation in reaction process, and 190
DEG C successive reaction 60h, no catalyst inactivation.
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| CN112007688A (en) * | 2020-08-10 | 2020-12-01 | 武汉大学 | Ruthenium catalyst for low-temperature catalytic oxidation of volatile organic pollutants, and preparation method and application thereof |
| CN112295554A (en) * | 2020-11-13 | 2021-02-02 | 中国科学技术大学 | Catalytic combustion catalyst, preparation method and application thereof |
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| CN114011406A (en) * | 2021-11-28 | 2022-02-08 | 辽宁石油化工大学 | Ruthenium-based oxide catalyst, preparation method and application |
| CN114345332A (en) * | 2021-12-02 | 2022-04-15 | 济南大学寿光产业技术研究院 | Bimetallic composite rod-like nano catalyst and application thereof in C-H bond oxidation reaction |
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| CN113996292A (en) * | 2021-10-20 | 2022-02-01 | 北京动力机械研究所 | Preparation and application of integral torch combustion catalyst |
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| CN114345332A (en) * | 2021-12-02 | 2022-04-15 | 济南大学寿光产业技术研究院 | Bimetallic composite rod-like nano catalyst and application thereof in C-H bond oxidation reaction |
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| CN116328766A (en) * | 2023-03-01 | 2023-06-27 | 青岛科技大学 | Doped Ru x CeO 2 Preparation method and application of catalyst |
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