CN106391040A - High-efficiency low temperature denitration composite catalyst and preparation method thereof - Google Patents
High-efficiency low temperature denitration composite catalyst and preparation method thereof Download PDFInfo
- Publication number
- CN106391040A CN106391040A CN201611016150.7A CN201611016150A CN106391040A CN 106391040 A CN106391040 A CN 106391040A CN 201611016150 A CN201611016150 A CN 201611016150A CN 106391040 A CN106391040 A CN 106391040A
- Authority
- CN
- China
- Prior art keywords
- catalyst
- carbon fiber
- composite catalyst
- preparation
- ceo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/847—Vanadium, niobium or tantalum or polonium
- B01J23/8472—Vanadium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/206—Rare earth metals
- B01D2255/2065—Cerium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20723—Vanadium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20738—Iron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a high-efficiency low temperature denitration composite catalyst. The composite catalyst comprises 4-18 wt% of a V2O5 catalyst, 0.25-2 wt% of Fe2O3, 0.25-2 wt% of CeO2, and the balance of micro-porous carbon fibers. The invention also provides the high-efficiency low temperature denitration composite catalyst and a preparation method thereof. The catalyst prepared in the invention reduces the operating temperature of SCR, allows the temperature range to be 86-102 DEG C when the denitration rate reaches 80% and the denitration rate to be greater than 95% when the temperature is 120 DEG C, and also has the advantages of very good SO2 poisoning resistance, high wear resistance and long service life.
Description
Technical field
The present invention relates to chemical field is and in particular to a kind of high efficient cryogenic denitration composite catalyst and preparation method thereof.
Background technology
In view of the coal fire discharged NO in the current thermal power plant of Chinax、SO2Total amount is well beyond the self-purification ability of enviroment, causes
Serious environmental pollution, nearly 1/3rd territory suffers from Acid Rain Pollution, and the desulphurization denitration carrying out flue gas is extremely urgent.
Selective reduction（SCR）Technology as denitration method for flue gas best at present, due to its mature and reliable, nitric efficiency
High, cost performance is high and be widely applied.Cardinal principle be reducing agent at certain temperature and catalyst action, have selection
Ground is the NO in flue gasxIt is reduced to N2, generate water simultaneously.The actual desulphurization denitration program of power plant is at present：First with exhaust opening
High temperature（300~400 ℃）Carry out denitration, then carry out dedusting, finally carry out desulfurization.It can be seen that, in flue gas, substantial amounts of dust is to de-
The denitrating catalyst of nitre link certainly will have and has a strong impact on.For SCR system commercial catalysts mainly have noble metal catalyst,
The several types such as metal oxide catalyst, perovskite type catalyst, molecular sieve catalyst and carbon-supported catalysts.Catalyst
Activity is typically higher to temperature requirement, but cigarette temperature is generally in middle low temperature range, and currently can obtain higher in middle cold stage
The catalyst of SCR denitration efficiency seldom, and haves such problems as that complicated process of preparation, high cost, hydrothermal stability are poor.Preferably
SCR denitration should have the characteristics that：High activity, anti-SO2Poisoning capability is strong；High mechanical strength, abrasion resistance properties are good；Have
Suitable operating temperature is interval（Especially low-temperature range）.The screening of excellent catalyst carrier and catalyst activity component and group
Proportioning between point is the key of catalyst research.
Use activated carbon supported V2O5The V of preparation2O5/ AC catalyst has good low temperature active (150 ~ 200 DEG C) and urges
Change efficiency and be widely used in simultaneous SO_2 and NO removal industry.Ma Jianrong etc.（Ma Jianrong, Liu Zhenyu etc. simultaneously in removing flue gas
Sulfur and the V of nitre2O5/ AC catalyst research. chemistry of fuel journal, 2005,33 (1): 6-11.）In fixed-bed micro-reactor
On studied by the catalyst that the desulphurization denitration in flue gas is used, find V2O5Load is obtained on activated carbon
V2O5/ AC catalyst can remove the SO in flue gas at 200 DEG C simultaneously2And NO.But SO in subtractive process2Easily adsorb on the activated carbon
Form sulfate, reduce the activity of catalyst.It is therefore prevented that the generation of sulfate, the growing up of granule, catalyst is made to obtain regeneration
It is current key task to maintain higher catalysis activity.
, compared with conventional activated carbon, specific surface area is big, and the micropore of rich content accounts for total pore volume for NACF (ACF)
90% about, pore-size distribution is narrow and uniform, and, mostly in 1 nm, adsorption and desorption speed is fast, plasticity and again for micropore size
Natural disposition is strong.Structure of Activated Carbon Fibers intensity is higher, can meet multiple conditions of flue gas desulphurization denitration, can be processed into
Various shapes, improve the contact area of adsorption reaction, reach the Active pharmaceutical of desulphurization denitration simultaneously.NACF desulphurization denitration
When speed compared with conventional carbon, the advantage of Radix Achyranthis Bidentatae can be reached, both can improve the absorbability of desulphurization denitration, may be used again
To lift the standard purifying.There are various functional groups on ACF surface, has very well for metal ion, some Organic substances and some gas
Selective absorption function, be used for nitrogen oxides in effluent catalytic purification research.Shirahama etc.（Shirahama N,
Mochida I, Korai Y, et al. Reaction of NO2in air at room temperature with
urea supported on pitch based activated carbon fiber. Applied Catalysis B:
Environmental, 2004, 52: 173-179.）NO is purified using ACF load carbamide2Effect is fine, and NO2It is easier to
It is reduced or is adsorbed agent to absorb.But at a lower temperature, absorption and reduction effect to NO are not satisfactory.Work out activated carbon
Fiber can the load, metal oxide catalyst economically and under technical all feasible low temperature state is nitrogen oxides control
The developing direction in field.
In sum, research high activity, anti-SO2Poisoning capability is strong, and high mechanical strength, abrasion resistance properties are good, and there have to be suitable
Operating temperature is interval（Especially low-temperature range）Catalyst to improve denitration efficiency, improve SCR denitration operation, reduce produce into
This is particularly significant.
Content of the invention
In view of above for the analysis of existing result of study and the actual demand of desulphurization denitration, overcoming existing catalyst to exist
During lower temperature, catalysis activity is low or denitration efficiency is low, and SO easily occurs2Poisoning and shortcoming easy to wear, the invention provides one
Plant high efficient cryogenic denitration composite catalyst.Concrete technical scheme is as follows：
A kind of high efficient cryogenic denitration composite catalyst, this composite catalyst includes carrier, catalyst and auxiliary agent；Described carrier is micro-
Hole carbon fiber, described catalyst are V2O5, described auxiliary agent be Fe2O3And CeO2.
Preferably, described V2O5、Fe2O3And CeO2Weight fraction be respectively 4 ~ 18wt%, 0.25 ~ 2wt%, 0.25 ~ 2wt%,
Balance of microporous carbon fiber carrier.
Present invention also offers a kind of preparation method of above-mentioned high efficient cryogenic denitration composite catalyst, there is following preparation step
Suddenly：
The preparation of microporous carbon fiber and Fe2O3The load of auxiliary agent：First by polyacrylonitrile and Fe organic precursor（As acetic acid
Ferrum, ferric oxalate）It is dissolved in organic solvent（Volatile nontoxic or low toxicity organic solvent, such as ethanol, oxolane etc.）In, carry out
Electrostatic spinning prepares compounding fiber, then carry out pre-oxidizing at 200 ~ 250 DEG C, 600 ~ 800 DEG C carry out carbonization, obtain Fe2O3
The microporous carbon fiber of nanometer particle load.
V2O5Catalyst, CeO2The load of auxiliary agent：First the nitrate of V, Ce is dissolved wiring solution-forming, pour water heating kettle into
In, then by Fe2O3The microporous carbon fiber of nanometer particle load adds, sealing, heats 2 h at 180 DEG C.The sample of hydrothermal treatment consists
Carry out roasting at 400 ~ 500 DEG C, obtain catalyst V2O5, auxiliary agent CeO2And Fe2O3The compound carbon fiber catalysis of nanometer particle load
Agent.
The present invention, with microporous carbon fiber as carrier, can improve the contact area of adsorption reaction, makes to NOx absorbability more
By force, fibre structure intensity is higher, can effectively extend the service life of catalyst.
Auxiliary agent Fe in the present invention2O3Nanoparticle in 20 below nm, be uniformly dispersed, be embedded in inside carbon fiber, promote carbon
The local graphite of fiber, makes carbon fiber have higher intensity and heat conductivility, Fe simultaneously2O3Nanoparticle can be significantly
Improve the low-temperature SCR performance of catalyst, strengthen anti-poisoning capability（Prevent the generation of sulfate）And so that catalyst is had well
Water resistant activity.
The present invention adds auxiliary agent CeO2Because Ce has multiple valence states, can play in catalytic reaction transmission electronics,
Ion and the effect of storage oxygen, it can be used as auxiliary agent and promotes NO to be converted into NO2To improve the low-temperature SCR activity of catalyst.CeO2
The introducing of nanoparticle not only increases the low temperature active of catalyst, broadens reaction temperature window, and enhances catalyst
Anti-wear performance.
Because denitration reaction belongs to the reaction of gas-solid out-phase, the V that the present invention is prepared using hydro-thermal method2O5And CeO2Powder body
Have the advantages that purity is high, grain component and form are controlled, gained diameter of particle in 30 below nm, dispersed, with carrier knot
Close more firm, the activity of catalyst can be improved further.
The present invention is simultaneously introduced V on microporous carbon fiber2O5、Fe2O3And CeO2Component, the catalyst of preparation and existing catalysis
Agent is compared with advantages below：
High low temperature active：When temperature is 120 DEG C, NOx entirety removal efficiency is more than 95%, and denitration rate reaches temperature when 80%
Scope is 80 ~ 100 DEG C；
SO well2Anti- poisoning capability and water resistant activity：Catalyst is applied to SO during SCR denitration2Conversion ratio is less than
2.5%；
Very strong mechanical strength, longer service life：Catalyst abrasion amount is less than 40 mg.
Specific embodiment
Below taking prepare this composite catalyst of 10 g as a example, the present invention is described in detail：
Embodiment 1
A kind of high efficient cryogenic denitration composite catalyst, this composite catalyst includes carrier microporous carbon fiber, catalyst V2O5, auxiliary agent
Fe2O3And CeO2；V2O5、Fe2O3And CeO2Weight fraction be respectively 4wt%, 2wt%, 2wt%, balance of microporous carbon fiber carrier.
A kind of method preparing this catalyst, has following preparation process：
The preparation of microporous carbon fiber and Fe2O3The load of auxiliary agent：First will be molten to 13.54 g polyacrylonitrile and 0.58 g ferric acetate
Solution in ethanol, carries out electrostatic spinning and prepares compounding fiber, then 200 ~ 250 DEG C carry out pre-oxidizing, 600 ~ 800 DEG C carry out
Carbonization, finally obtains Fe2O3The microporous carbon fiber of nanometer particle load, wherein Fe2O3Nanoparticle mean diameter is 15 nm, divides
Dissipate uniformly, be embedded in inside carbon fiber；Microporous carbon fiber local graphite；
V2O5Catalyst and CeO2The load of auxiliary agent：First by 0.40 g V (NO3)5With 0.08 g Ce (NO3)3·6H2O is molten
Solution wiring solution-forming, pours in water heating kettle, then by Fe2O3The microporous carbon fiber of nanometer particle load adds, sealing, at 180 DEG C
Heat 2 h.The sample of hydrothermal treatment consists carries out roasting at 400 ~ 500 DEG C, obtains catalyst V2O5, auxiliary agent CeO2And Fe2O3Nanoparticle
The composite carbon fiber catalyst of son load, catalyst V2O5, auxiliary agent CeO2Mean diameter is 26 nm, dispersed.
This catalyst is used for the SCR method denitration of flue gas, flue gas GHSV（Gas space velocity per hour）=40000 h-1, wherein
NOX、NH3、O2、SO2Volume fraction be respectively 0.05%, 0.05%, 5%, 0.1%, N2For Balance Air, other compositions and actual flue gas
Composition is basically identical.Experimental result：When temperature is 120 DEG C, NOXRemoval efficiency is 96%, SO2Conversion ratio is 1.2%, catalyst abrasion
Measure as 28 mg；Denitration rate reaches temperature when 80% and is 95 DEG C.
Embodiment 2
A kind of high efficient cryogenic denitration composite catalyst, this composite catalyst includes carrier microporous carbon fiber, catalyst V2O5, auxiliary agent
Fe2O3And CeO2；V2O5、Fe2O3And CeO2Weight fraction be respectively 18wt%, 0.25wt%, 0.25wt%, balance of microporous carbon is fine
Dimension carrier.
A kind of method preparing this catalyst, has following preparation process：
The preparation of microporous carbon fiber and Fe2O3The load of auxiliary agent：First will be molten to 12.0 g polyacrylonitrile and 3.64 g ferric acetates
Solution in ethanol, carries out electrostatic spinning and prepares compounding fiber, then 200 ~ 250 DEG C carry out pre-oxidizing, 600 ~ 800 DEG C carry out
Carbonization, finally obtains Fe2O3The microporous carbon fiber of nanometer particle load, wherein Fe2O3Nanoparticle mean diameter is 16 nm, divides
Dissipate uniformly, be embedded in inside carbon fiber；Microporous carbon fiber local graphite；
V2O5Catalyst and CeO2The load of auxiliary agent：First by 3.57 g V (NO3)5With 6.31 g Ce (NO3)3·6H2O is molten
Solution wiring solution-forming, pours in water heating kettle, then by Fe2O3The microporous carbon fiber of nanometer particle load adds, sealing, at 180 DEG C
Heat 2 h.The sample of hydrothermal treatment consists carries out roasting at 400 ~ 500 DEG C, obtains catalyst V2O5, auxiliary agent CeO2And Fe2O3Nanoparticle
The composite carbon fiber catalyst of son load, catalyst V2O5, auxiliary agent CeO2Mean diameter is 25 nm, dispersed.
This catalyst is used for the SCR method denitration of flue gas, flue gas GHSV (gas space velocity per hour)=40000 h-1, its
Middle NOX、NH3、O2、SO2Volume fraction be respectively 0.05%, 0.05%, 5%, 0.1%, N2For Balance Air, other compositions and actual cigarette
Gas composition is basically identical.Experimental result：When temperature is 120 DEG C, NOXRemoval efficiency is 98%, SO2Conversion ratio is 2.3%, and catalyst grinds
Damage amount is 35 mg；Denitration rate reaches temperature when 80% and is 86 DEG C.
Embodiment 3
A kind of high efficient cryogenic denitration composite catalyst, this composite catalyst includes carrier microporous carbon fiber, catalyst V2O5, auxiliary agent
Fe2O3And CeO2；V2O5、Fe2O3And CeO2Weight fraction be respectively 8wt%, 1wt%, 0.6wt%, balance of microporous carbon fiber carries
Body.
A kind of method preparing this catalyst, has following preparation process：
The preparation of microporous carbon fiber and Fe2O3The load of auxiliary agent：First will be molten to 13.31 g polyacrylonitrile and 0.29 g ferric oxalate
Solution in ethanol, carries out electrostatic spinning and prepares compounding fiber, then 200 ~ 250 DEG C carry out pre-oxidizing, 600 ~ 800 DEG C carry out
Carbonization, finally obtains Fe2O3The microporous carbon fiber of nanometer particle load, wherein Fe2O3Nanoparticle mean diameter is 16 nm, divides
Dissipate uniformly, be embedded in inside carbon fiber；Microporous carbon fiber local graphite；
V2O5Catalyst and CeO2The load of auxiliary agent：First by 1.91 g V (NO3)5With 0.15 g Ce (NO3)3·6H2O is molten
Solution wiring solution-forming, pours in water heating kettle, then by Fe2O3The microporous carbon fiber of nanometer particle load adds, sealing, at 180 DEG C
Heat 2 h.The sample of hydrothermal treatment consists carries out roasting at 400 ~ 500 DEG C, obtains catalyst V2O5, auxiliary agent CeO2And Fe2O3Nanoparticle
The composite carbon fiber catalyst of son load, catalyst V2O5, auxiliary agent CeO2Mean diameter is 27 nm, dispersed.
This catalyst is used for the SCR method denitration of flue gas, flue gas GHSV (gas space velocity per hour)=40000 h-1, its
Middle NOX、NH3、O2、SO2Volume fraction be respectively 0.05%, 0.05%, 5%, 0.1%, N2For Balance Air, other compositions and actual cigarette
Gas composition is basically identical.Experimental result：When temperature is 120 DEG C, NOXRemoval efficiency is 98%, SO2Conversion ratio is 1.4%, and catalyst grinds
Damage amount is 36 mg；Denitration rate reaches temperature when 80% and is 95 DEG C.
Embodiment 4
A kind of high efficient cryogenic denitration composite catalyst, this composite catalyst includes carrier microporous carbon fiber, catalyst V2O5, auxiliary agent
Fe2O3And CeO2；V2O5、Fe2O3And CeO2Weight fraction be respectively 10%, 2wt%, 0.8wt%, balance of microporous carbon fiber carries
Body.
A kind of method preparing this catalyst, has following preparation process：
The preparation of microporous carbon fiber and Fe2O3The load of auxiliary agent：First will be molten to 12.38 g polyacrylonitrile and 0.58 g ferric oxalate
Solution, in oxolane, carries out electrostatic spinning and prepares compounding fiber, then 200 ~ 250 DEG C carry out pre-oxidizing, 600 ~ 800 DEG C
Carry out carbonization, finally obtain Fe2O3The microporous carbon fiber of nanometer particle load, wherein Fe2O3Nanoparticle mean diameter is 15
Nm, it is uniformly dispersed, is embedded in inside carbon fiber；Microporous carbon fiber local graphite；
V2O5Catalyst and CeO2The load of auxiliary agent：First by 1.98 g V (NO3)5With 0.20 g Ce (NO3)3·6H2O is molten
Solution wiring solution-forming, pours in water heating kettle, then by Fe2O3The microporous carbon fiber of nanometer particle load adds, sealing, at 180 DEG C
Heat 2 h.The sample of hydrothermal treatment consists carries out roasting at 400 ~ 500 DEG C, obtains catalyst V2O5, auxiliary agent CeO2And Fe2O3Nanoparticle
The composite carbon fiber catalyst of son load, catalyst V2O5, auxiliary agent CeO2Mean diameter is 26 nm, dispersed.
This catalyst is used for the SCR method denitration of flue gas, flue gas GHSV (gas space velocity per hour)=40000 h-1, its
Middle NOX、NH3、O2、SO2Volume fraction be respectively 0.05%, 0.05%, 5%, 0.1%, N2For Balance Air, other compositions and actual cigarette
Gas composition is basically identical.Experimental result：When temperature is 120 DEG C, NOXRemoval efficiency is 97%, SO2Conversion ratio is 2.4%, and catalyst grinds
Damage amount is 28 mg；Denitration rate reaches temperature when 80% and is 102 DEG C.
Embodiment 5
A kind of high efficient cryogenic denitration composite catalyst, this composite catalyst includes carrier microporous carbon fiber, catalyst V2O5, auxiliary agent
Fe2O3And CeO2；V2O5、Fe2O3And CeO2Weight fraction be respectively 15wt%, 0.5wt%, 2wt%, balance of microporous carbon fiber carries
Body.
A kind of method preparing this catalyst, has following preparation process：
The preparation of microporous carbon fiber and Fe2O3The load of auxiliary agent：First will be molten to 12.15 g polyacrylonitrile and 0.15 g ferric oxalate
Solution, in oxolane, carries out electrostatic spinning and prepares compounding fiber, then 200 ~ 250 DEG C carry out pre-oxidizing, 600 ~ 800 DEG C
Carry out carbonization, finally obtain Fe2O3The microporous carbon fiber of nanometer particle load, wherein Fe2O3Nanoparticle mean diameter is 18
Nm, it is uniformly dispersed, is embedded in inside carbon fiber；Microporous carbon fiber local graphite；
V2O5Catalyst and CeO2The load of auxiliary agent：First by 2.98 g V (NO3)5With 0.50 g Ce (NO3)3·6H2O is molten
Solution wiring solution-forming, pours in water heating kettle, then by Fe2O3The microporous carbon fiber of nanometer particle load adds, sealing, at 180 DEG C
Heat 2 h.The sample of hydrothermal treatment consists carries out roasting at 400 ~ 500 DEG C, obtains catalyst V2O5, auxiliary agent CeO2And Fe2O3Nanoparticle
The composite carbon fiber catalyst of son load, catalyst V2O5, auxiliary agent CeO2Mean diameter is 25 nm, dispersed.
This catalyst is used for the SCR method denitration of flue gas, flue gas GHSV (gas space velocity per hour)=40000 h-1, its
Middle NOX、NH3、O2、SO2Volume fraction be respectively 0.05%, 0.05%, 5%, 0.1%, N2For Balance Air, other compositions and actual cigarette
Gas composition is basically identical.Experimental result：When temperature is 120 DEG C, NOXRemoval efficiency is 95%, SO2Conversion ratio is 1.3%, and catalyst grinds
Damage amount is 27 mg；Denitration rate reaches temperature when 80% and is 99 DEG C.
Above example is only the preferred embodiment of the present invention, should not be construed as limiting the invention.Obviously originally
The technical scheme of invention is not limited to above-described embodiment, can also have many variations.Those of ordinary skill in the art, with the present invention
Undoubted the obtaining of clearly disclosed or according to file written description, be all considered as the claimed model of this patent
Enclose.
Claims (7)
1. a kind of high efficient cryogenic denitration composite catalyst it is characterised in that：This composite catalyst includes carrier, catalyst and helps
Agent；Described carrier is microporous carbon fiber, and described catalyst is V2O5, described auxiliary agent is Fe2O3And CeO2.
2. a kind of high efficient cryogenic denitration composite catalyst according to claim 1 it is characterised in that：Described V2O5、Fe2O3With
CeO2Weight fraction be respectively 4 ~ 18wt%, 0.25 ~ 2wt%, 0.25 ~ 2wt%, balance of microporous carbon fiber carrier.
3. a kind of preparation method of the high efficient cryogenic denitration composite catalyst according to right 1 or right 2 is it is characterised in that have
There is following preparation process：
The preparation of microporous carbon fiber and Fe2O3The load of auxiliary agent：By the co-blended spinning of Fe organic precursor and polyacrylonitrile,
Pre-oxidation, carbonization, obtain Fe2O3The microporous carbon fiber of nanometer particle load；
V2O5Catalyst and CeO2The load of auxiliary agent：By water on Fe nanometer particle load microporous carbon fiber for V, Ce presoma
Heat load, roasting, obtain denitration composite catalyst.
4. according to claim 3 the preparation method of high efficient cryogenic denitration composite catalyst it is characterised in that Fe organosilane precursor
Body is ferric acetate, ferric oxalate.
5. according to claim 3 the preparation method of high efficient cryogenic denitration composite catalyst it is characterised in that V, Ce presoma
For nitrate.
6. according to claim 3 the preparation method of high efficient cryogenic denitration composite catalyst it is characterised in that described step
Pre oxidation is 200 ~ 250 DEG C；Described carburizing temperature is 600 ~ 800 DEG C.
7. according to claim 3 the preparation method of high efficient cryogenic denitration composite catalyst it is characterised in that described step
Sintering temperature is 400 ~ 500 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611016150.7A CN106391040B (en) | 2016-11-18 | 2016-11-18 | A kind of high efficient cryogenic denitration composite catalyst and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611016150.7A CN106391040B (en) | 2016-11-18 | 2016-11-18 | A kind of high efficient cryogenic denitration composite catalyst and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106391040A true CN106391040A (en) | 2017-02-15 |
| CN106391040B CN106391040B (en) | 2018-12-28 |
Family
ID=58068902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611016150.7A Active CN106391040B (en) | 2016-11-18 | 2016-11-18 | A kind of high efficient cryogenic denitration composite catalyst and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106391040B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126730A (en) * | 2017-12-15 | 2018-06-08 | 中国第汽车股份有限公司 | Improve the method for integral extruding type honeycomb catalyst thermal conductivity factor |
| CN113457731A (en) * | 2021-07-06 | 2021-10-01 | 中国科学院过程工程研究所 | Molecular sieve catalytic inorganic fiber, preparation method thereof and dust removal and denitration integrated application |
| CN114849469A (en) * | 2022-06-10 | 2022-08-05 | 德州职业技术学院（德州市技师学院） | Flue gas denitration preposed module and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0779094A2 (en) * | 1995-12-13 | 1997-06-18 | Daimler-Benz Aktiengesellschaft | Spinel based catalyst, its preparation and its use |
| CN1792455A (en) * | 2005-12-27 | 2006-06-28 | 中国科学院山西煤炭化学研究所 | Cellular activated-carbon catalyst used for denitrification of flue-gas, prepn. method and application thereof |
| CN103433033A (en) * | 2013-07-25 | 2013-12-11 | 上海电力学院 | Low-temperature denitration catalyst MnOx-CeO2-TiO2-Al2O3, and preparation method and application thereof |
| CN103566928A (en) * | 2013-11-05 | 2014-02-12 | 清华大学 | Manganese peroxide loaded active carbon fiber for removing NOx at room temperature and preparation method thereof |
| CN104190432A (en) * | 2014-09-10 | 2014-12-10 | 清华大学 | Low-temperature denitration and synergetic desulfurization active carbon catalyst and preparation method thereof |
-
2016
- 2016-11-18 CN CN201611016150.7A patent/CN106391040B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0779094A2 (en) * | 1995-12-13 | 1997-06-18 | Daimler-Benz Aktiengesellschaft | Spinel based catalyst, its preparation and its use |
| CN1792455A (en) * | 2005-12-27 | 2006-06-28 | 中国科学院山西煤炭化学研究所 | Cellular activated-carbon catalyst used for denitrification of flue-gas, prepn. method and application thereof |
| CN103433033A (en) * | 2013-07-25 | 2013-12-11 | 上海电力学院 | Low-temperature denitration catalyst MnOx-CeO2-TiO2-Al2O3, and preparation method and application thereof |
| CN103566928A (en) * | 2013-11-05 | 2014-02-12 | 清华大学 | Manganese peroxide loaded active carbon fiber for removing NOx at room temperature and preparation method thereof |
| CN104190432A (en) * | 2014-09-10 | 2014-12-10 | 清华大学 | Low-temperature denitration and synergetic desulfurization active carbon catalyst and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 梁贺升等: "负载型活性碳纤维低温脱硝性能的研究", 《广东化工》 * |
| 熊志波等: "铁铈复合氧化物催化剂SCR脱硝的改性研究", 《燃料化学学报》 * |
| 陈燕等: "Ce-Fe/ACF催化剂低温选择性催化还原NO的研究", 《环境工程学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126730A (en) * | 2017-12-15 | 2018-06-08 | 中国第汽车股份有限公司 | Improve the method for integral extruding type honeycomb catalyst thermal conductivity factor |
| CN113457731A (en) * | 2021-07-06 | 2021-10-01 | 中国科学院过程工程研究所 | Molecular sieve catalytic inorganic fiber, preparation method thereof and dust removal and denitration integrated application |
| CN114849469A (en) * | 2022-06-10 | 2022-08-05 | 德州职业技术学院（德州市技师学院） | Flue gas denitration preposed module and preparation method thereof |
| CN114849469B (en) * | 2022-06-10 | 2023-07-21 | 德州职业技术学院（德州市技师学院） | Front-end module for flue gas denitration and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106391040B (en) | 2018-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102335604B (en) | SCR (selective catalyctic reduction) low-temperature denitrification catalyst with nano core-shell structure and preparation method thereof | |
| CN102824922B (en) | Integrated honeycomb SCR (selective catalytic reduction) catalyst for low-temperature smoke denitration and preparation method of catalyst | |
| JP6595088B2 (en) | SCR catalyst for removing nitrogen oxides and method for producing the same | |
| CN101602018B (en) | Method for preparing rare-earth element doped composite metal oxide mercury removal catalyst | |
| CN109569587A (en) | A kind of manganese-based low-temperature catalyst for denitrating flue gas and preparation method thereof | |
| CN106622380B (en) | A kind of denitrating catalyst and its preparation method and application | |
| CN108499556B (en) | Low-temperature denitration catalyst and preparation method thereof | |
| CN106669670B (en) | A kind of preparation method of fume desulfurizing agent | |
| CN108067296A (en) | A kind of preparation method of cellular Mn based low-temperature denitration catalysts | |
| CN103990496A (en) | Middle and low temperature SCR denitration catalyst with anti-poisoning performance, and preparation method thereof | |
| CN111097442B (en) | Flue gas synergistic denitration and demercuration catalyst and preparation method thereof | |
| CN103143345A (en) | Composite catalyst for catalytically oxidizing nitrogen oxide and preparation method of composite catalyst | |
| CN111545193A (en) | Hollow core-shell structure catalyst for catalytic oxidation of nitrogen oxide and preparation method thereof | |
| CN105879879A (en) | High-sulfur-resistant ultralow-temperature SCR (Selective Catalytic Reduction) denitration catalyst and preparation method thereof | |
| CN106391040B (en) | A kind of high efficient cryogenic denitration composite catalyst and preparation method thereof | |
| CN111001415A (en) | Preparation method of composite oxide low-temperature denitration catalyst and catalyst | |
| CN102000600B (en) | Integral normal-temperature micro nitrogen oxide purification material and preparation method thereof | |
| CN103611563B (en) | A kind of SCR Catalysts and its preparation method | |
| WO2015079804A1 (en) | Exhaust gas purification catalyst | |
| Wu et al. | Synthesis and catalytic performances of manganese oxides-loaded porous halloysite/carbon composites for the selective catalytic reduction of NO with NH3 | |
| CN111686716A (en) | WOxLow-temperature SCR (selective catalytic reduction) flue gas denitration catalyst with modified carbon nano tube loaded with metal oxide, and preparation method and application thereof | |
| CN106215949A (en) | A kind of low-temperature selective catalytic reduction denitration catalyst and preparation method thereof | |
| JP2012050980A (en) | Catalyst, oxidation catalyst, reduction catalyst, and exhaust gas cleaning catalyst | |
| CN108355606B (en) | Low-temperature NOx adsorption catalyst with good water resistance and preparation method thereof | |
| CN111151241A (en) | Integral honeycomb coating catalyst and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |