CN108816274A - A kind of NH3The preparation method and its catalyst of-SCR catalyst for denitrating flue gas - Google Patents
A kind of NH3The preparation method and its catalyst of-SCR catalyst for denitrating flue gas Download PDFInfo
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- CN108816274A CN108816274A CN201810531196.5A CN201810531196A CN108816274A CN 108816274 A CN108816274 A CN 108816274A CN 201810531196 A CN201810531196 A CN 201810531196A CN 108816274 A CN108816274 A CN 108816274A
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J29/42—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing iron group metals, noble metals or copper
- B01J29/46—Iron group metals or copper
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- 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
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- 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
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
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- B01J37/088—Decomposition of a metal salt
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
- B01J37/343—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of ultrasonic wave energy
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B01D2258/00—Sources of waste gases
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- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
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Abstract
The present invention relates to catalyst for denitrating flue gas technical fields, and in particular to a kind of NH3The preparation method and its catalyst of-SCR catalyst for denitrating flue gas, the preparation method of catalyst include the following steps：Take ZSM-5 zeolite support dispersion in the composite solution of ferric nitrate and copper nitrate, the ratio between amount of substance of Fe atom and Cu atom is 1 in the composite solution:4, and the quality of Fe element is the 10% of ZSM-5 carrier quality, dispersing method is magnetic stirring apparatus 50-60 DEG C of stirring 4-6h, ultrasonic oscillation 40min；After dispersion stratification, supernatant is outwelled, sediment is dry in electric heating constant-temperature blowing drying box, and shape of claying into power after dry is in Muffle kiln roasting, and regrinding is at powdered after roasting, as catalyst for denitrating flue gas.There are wider active temperature windows by catalyst prepared by this method, there is cheap, advantages of environment protection.
Description
Technical field
The present invention relates to catalyst for denitrating flue gas technical fields, and in particular to a kind of NH3- SCR catalyst for denitrating flue gas
Preparation method and its catalyst.
Background technique
The pollutant emission of coal power generation is with particulate matter, sulfur dioxide, the nitrogen oxides in flue gas（NOx）Based on.Nitrogen oxygen
The problems such as compound is discharged into atmosphere, can cause acid rain and photochemical fog, to environment, crop growth and human production life
It does great damage.
NH3The features such as SCR technology is due to its efficient selective, economy, high denitration efficiency has become the world at present and answers
With widest coal-fired plant flue gas denitration process.V2O5-WOx/TiO2It is current commercial most denitrating catalyst, activity temperature
Spending window is 300-400 DEG C, and thermal stability is poor, in high-temperature region easily by SO2It is oxidized to SO3, active component vanadium is toxic easily to environment
It causes damages with human health.
Summary of the invention
The object of the present invention is to provide a kind of NH3The preparation method and its catalyst of-SCR catalyst for denitrating flue gas, pass through
The catalyst of this method preparation has wider active temperature windows, can be suitable for coal-burning power plant, smeltery, diesel car etc.
Flue gas NH3SCR denitration, and there is cheap, advantages of environment protection.
In order to solve the above technical problems, the technical scheme adopted by the invention is that：A kind of NH3- SCR catalyst for denitrating flue gas
Preparation method, include the following steps：Take ZSM-5 zeolite support dispersion in the composite solution of ferric nitrate and copper nitrate, it is described
Composite solution in the ratio between the amount of substance of Fe atom and Cu atom be 1:4, and the quality of Fe element is ZSM-5 carrier quality
10%, dispersing method is magnetic stirring apparatus 50-60 DEG C of stirring 4-6h, ultrasonic oscillation 40min；After dispersion stratification,
Outwell supernatant, sediment is dry in electric heating constant-temperature blowing drying box, shape of claying into power after dry in Muffle kiln roasting,
Regrinding is at powdered after roasting, as catalyst for denitrating flue gas.
The ZSM-5 zeolite carrier is H-type, SiO2/Al2O3=27。
The ZSM-5 zeolite carrier is before use, remove moisture removal and impurity using 500 DEG C of processing 3h of Muffle furnace.
The composite solution by 0.2mol/L iron nitrate solution and 0.2mol/L copper nitrate solution by volume 4:1 is mixed
It closes.
In electric heating constant-temperature blowing drying box, drying temperature is 110 DEG C, a length of 10-12h when dry.
Roasting carries out under air atmosphere, and maturing temperature is 450 DEG C, when roasting a length of 3-4h.
The present invention also provides a kind of catalyst for having the above method to prepare.
Iron copper activity component is scattered in ZSM-5 zeolite carrier surface in the form of unformed oxide in catalyst, or with
The form of composite nanometer particle exists.
Denitration efficiency of the catalyst in 250-450 DEG C of temperature range is 90% or more.
Catalyst reaches maximum value in 335 DEG C of denitration efficiencies, and is 99.46%.
Beneficial effect：Bimetallic-modified Fe-Cu/ZSM-5 1 prepared by the present invention:The performance and the prior art of 4 catalyst
Compared to being significantly improved, under the conditions of simulated flue gas, catalyst 300mg, 24000 h of air speed-1, NOx concentration is about
Denitration efficiency reaches 90% or more in 1000ppm, 250-450 DEG C of wide temperature section, and 335 DEG C reach maximum value 99.46%；
In catalyst of the invention, iron copper activity component is scattered in ZSM-5 zeolite carrier surface in the form of unformed oxide, or with
The form of composite nanometer particle exists, and has small-size effect, skin effect, quantum size effect etc., due to nanoparticle
The influence of skin effect, the large specific surface area of nanoparticle, surface atom and number of active center are more, high catalytic efficiency；And due to
The influence of the quantum size effect of nanoparticle, nanometer ultramicron have special catalysis and photocatalysis property；ZSM-5 zeolite
It is cheap, have porous structure, specific surface area is larger, load iron-copper bi-metal nano composite active component be conducive to improve ratio
Surface area increases catalyst activity position and surface acidity position, optimizes SCR denitration performance, obtains nano combined Fe-Cu/ZSM-5
Catalyst can be provided simultaneously with two kinds of metal zeolite catalyst performances, widen temperature window, improve catalyst water resistant resistance to SO_2
Can, catalytic denitration is had excellent performance, and is had preferable commercial application potentiality, can be suitable for coal-burning power plant, smeltery, diesel car
Equal flue gases NH3SCR denitration, and there is cheap, advantages of environment protection.
Detailed description of the invention
Fig. 1 is the Fe-Cu/ZSM-5 1 of the specific embodiment of the invention:The TEM of 4 catalyst schemes；
Fig. 2 is the Fe-Cu/ZSM-5 1 of the specific embodiment of the invention:The XRD diagram of 4 catalyst.
Specific embodiment
The present invention will be further described in detail in the following with reference to the drawings and specific embodiments, and non-detailed portion is below
The prior art uses the prior art can be realized.
A kind of NH3The preparation method of-SCR catalyst for denitrating flue gas, includes the following steps：
Step 1: material prepares：
1）Take H-ZSM-5 zeolite molecular sieve（SiO2/Al2O3=27, Tianjin Nankai university chemistry chemical reagent work）, using Muffle furnace 500
DEG C processing 3h remove moisture removal and impurity, be cooled to room temperature, as carrier；
2）Electronic balance weighs 40.4g ferric nitrate Fe (NO3)2•9H2O（Tianjin great Mao chemical reagent factory is analyzed pure）Sufficiently dissolution
In 500mL distilled water, it is configured to the iron nitrate solution of 0.2mol/L；
3）Electronic balance weighs 24.16g copper nitrate Cu (NO3)2•3H2O（Tianjin great Mao chemical reagent factory is analyzed pure）Sufficiently dissolution
In 500ml distilled water, it is configured to the copper nitrate solution of 0.2mol/L；
Step 2: the preparation of catalyst：
1）The copper nitrate solution 22.5mL for taking the iron nitrate solution 90mL and 0.2mol/L of 0.2mol/L is stirred equal with glass bar
It is even, obtain the composite solution of ferric nitrate and copper nitrate；
2）The H-ZSM-5 Zeolite support of 10g is taken to be scattered in the composite solution of ferric nitrate and copper nitrate, dispersing method is stirred for magnetic force
Mix device 50-60 DEG C of stirring 4-6h, ultrasonic oscillation 40min；
3）After dispersion stratification, supernatant is outwelled, sediment is dry in electric heating constant-temperature blowing drying box, it is dry
Temperature is 110 DEG C, a length of 10-12h when dry；
4）Shape is clayed into power after drying in Muffle kiln roasting, roasting carries out under air atmosphere, and maturing temperature is 450 DEG C, roasting
A length of 3-4h when burning；
5）Regrinding is packed into sample sack and is labeled as Fe-Cu/ZSM-5 1 at powdered after roasting:4 urge to get to denitrating flue gas
Agent.
As shown in Figure 1, the catalyst prepared by the above method, nano particle content is more and is evenly distributed in carrier table
The content in face, surface-active oxide nano particle is high and relative grain size is smaller（About 5 nm）, copper and iron active specy nanometer are multiple
It closes particle and is capable of providing more catalytic active sites, be conducive to NH3- SCR reaction.
As shown in Fig. 2, there is the main of ZSM-5 zeolite in sample XRD spectra by the catalyst of above method preparation
Characteristic peak（PDF# 44-0003,2θ=7.92°,8.80°,23.12°,23.46°,23.80°）, Fe-Cu/ZSM-5 1:42 θ=
35.60 °, 38.75 ° there is the weaker diffraction maximum of apparent CuO, and characteristic peaks are unobvious, show the crystal knot of Zeolite support
Structure does not destroy, and copper and iron species can be well dispersed in carrier surface or iron and copper oxide particulate with unformed oxide to receive
Nano composite material form exists, this is conducive to enhance NH3SCR activity.
Catalytic test：By 300mg Fe-Cu/ZSM-5 1:4 catalyst are added to the fixation of professional catalyst test apparatus
In bed reactor, preparing simulated flue gas group becomes：3% NO（20mL/min）, 3% NH3（20 mL /min）, 21% O2（10 mL
/min）And balance carrier gas N2（150 mL /min）, each gas flow controls by mass flowmenter, and flue gas total flow is 200 mL
/ min, corresponding 24000 h of air speed-1, 10 DEG C/min of heating rate, reaction temperature 100 ~ 500 be DEG C, German 340 type cigarette of Testo
Gas analyzer detects reactor outlet NOx concentration；
Test result：The denitration efficiency of catalyst is 90% or more in 250-450 DEG C of wide temperature section, and de- at 335 DEG C
Nitre efficiency reaches maximum, is 99.46%.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above are modified or are modified
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of NH3The preparation method of-SCR catalyst for denitrating flue gas, which is characterized in that include the following steps：Take ZSM-5 zeolite
Support dispersion is in the composite solution of ferric nitrate and copper nitrate, the amount of the substance of Fe atom and Cu atom in the composite solution
The ratio between be 1:4, and the quality of Fe element is the 10% of ZSM-5 carrier quality, dispersing method is 50-60 DEG C of magnetic stirring apparatus stirring
4-6h, ultrasonic oscillation 40min；After dispersion stratification, supernatant is outwelled, sediment is done in electric heating constant temperature air blast
Dry in dry case, shape of claying into power after dry is in Muffle kiln roasting, and regrinding is at powdered after roasting, as denitrating flue gas
Catalyst.
2. a kind of NH as described in claim 13The preparation method of-SCR catalyst for denitrating flue gas, it is characterised in that：Described
ZSM-5 zeolite carrier is H-type, SiO2/Al2O3=27。
3. a kind of NH as described in claim 13The preparation method of-SCR catalyst for denitrating flue gas, it is characterised in that：Described
ZSM-5 zeolite carrier is before use, remove moisture removal and impurity using 500 DEG C of processing 3h of Muffle furnace.
4. a kind of NH as described in claim 13The preparation method of-SCR catalyst for denitrating flue gas, it is characterised in that：Described answers
Solution is closed by the iron nitrate solution and 0.2mol/L copper nitrate solution by volume 4 of 0.2mol/L:1 mixes.
5. a kind of NH as described in claim 13The preparation method of-SCR catalyst for denitrating flue gas, it is characterised in that：Electric heating constant temperature
In air dry oven, drying temperature is 110 DEG C, a length of 10-12h when dry.
6. a kind of NH as described in claim 13The preparation method of-SCR catalyst for denitrating flue gas, it is characterised in that：Roasting is in sky
Atmosphere encloses lower progress, and maturing temperature is 450 DEG C, when roasting a length of 3-4h.
7. a kind of catalyst prepared by any one of claim 1-6 the method.
8. catalyst as claimed in claim 7, it is characterised in that：Iron copper activity component is in catalyst with unformed oxide
Form is scattered in ZSM-5 zeolite carrier surface, or exists in the form of composite nanometer particle.
9. catalyst as claimed in claim 7, it is characterised in that：Denitration effect of the catalyst in 250-450 DEG C of temperature range
Rate is 90% or more.
10. catalyst as claimed in claim 8, it is characterised in that：Catalyst reaches maximum value in 335 DEG C of denitration efficiencies, and
It is 99.46%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701605A (en) * | 2018-12-31 | 2019-05-03 | 萍乡市华星环保工程技术有限公司 | A kind of monoblock type MnFeCeZSM-5 fine catalyst preparation method of middle low-temperature denitration |
| CN112691665A (en) * | 2020-12-29 | 2021-04-23 | 常州大学 | Copper-doped iron-based catalyst and preparation method thereof |
| CN113262814A (en) * | 2021-06-10 | 2021-08-17 | 中海石油(中国)有限公司湛江分公司 | Preparation method of iron modified ZSM-5 zeolite catalyst |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612403A (en) * | 2009-07-09 | 2012-07-25 | 催化解决方法股份有限公司 | Ammonia scr catalyst and method of using the catalyst |
| CN202343097U (en) * | 2011-11-26 | 2012-07-25 | 河南科技大学 | Dust removal and catalytic denitration reaction device for garbage incineration flue gas |
| CN103447079A (en) * | 2013-08-23 | 2013-12-18 | 淮阴工学院 | Preparation method of Cu-Fe-ZSM-5-attapulgite compound flue gas denitrification catalyst |
| CN104841474A (en) * | 2015-03-19 | 2015-08-19 | 碗海鹰 | SCR catalyst and preparation method therefor |
| CN105289707A (en) * | 2015-11-06 | 2016-02-03 | 中国第一汽车股份有限公司 | Method for preparing novel Cu-Fe molecular sieve catalyst for diesel vehicle tail gas |
-
2018
- 2018-05-29 CN CN201810531196.5A patent/CN108816274A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102612403A (en) * | 2009-07-09 | 2012-07-25 | 催化解决方法股份有限公司 | Ammonia scr catalyst and method of using the catalyst |
| CN202343097U (en) * | 2011-11-26 | 2012-07-25 | 河南科技大学 | Dust removal and catalytic denitration reaction device for garbage incineration flue gas |
| CN103447079A (en) * | 2013-08-23 | 2013-12-18 | 淮阴工学院 | Preparation method of Cu-Fe-ZSM-5-attapulgite compound flue gas denitrification catalyst |
| CN104841474A (en) * | 2015-03-19 | 2015-08-19 | 碗海鹰 | SCR catalyst and preparation method therefor |
| CN105289707A (en) * | 2015-11-06 | 2016-02-03 | 中国第一汽车股份有限公司 | Method for preparing novel Cu-Fe molecular sieve catalyst for diesel vehicle tail gas |
Non-Patent Citations (1)
| Title |
|---|
| 胡海鹏等: ""Fe-Cu/ZSM-5催化剂的NH3-SCR脱硝性能"", 《燃料化学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701605A (en) * | 2018-12-31 | 2019-05-03 | 萍乡市华星环保工程技术有限公司 | A kind of monoblock type MnFeCeZSM-5 fine catalyst preparation method of middle low-temperature denitration |
| CN112691665A (en) * | 2020-12-29 | 2021-04-23 | 常州大学 | Copper-doped iron-based catalyst and preparation method thereof |
| CN113262814A (en) * | 2021-06-10 | 2021-08-17 | 中海石油(中国)有限公司湛江分公司 | Preparation method of iron modified ZSM-5 zeolite catalyst |
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