CN107138174A - A kind of denitrating catalyst and preparation method thereof - Google Patents
A kind of denitrating catalyst and preparation method thereof Download PDFInfo
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- CN107138174A CN107138174A CN201710484240.7A CN201710484240A CN107138174A CN 107138174 A CN107138174 A CN 107138174A CN 201710484240 A CN201710484240 A CN 201710484240A CN 107138174 A CN107138174 A CN 107138174A
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- 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
- 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
- B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
- B01J29/26—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
-
- 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
- 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
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/16—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J29/163—X-type faujasite
-
- 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
- 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
- B01J29/80—Mixtures of different zeolites
Abstract
The invention provides a kind of denitrating catalyst and preparation method thereof, the denitrating catalyst includes catalyst carrier, the active component being carried in the catalyst carrier and auxiliary agent and glass fibre, the glass fibre is entrained in the catalyst carrier, active component and auxiliary agent, and the catalyst carrier includes foam ceramic material；The active component includes MnO2, it is described to help active component to include MoO3And Cr2O3；Also, it is that based on 100%, the content of the active component is 12 28% by the gross weight of denitrating catalyst；The content for helping active component is 0.5 6%；The content of the glass fibre is 5 18%, and surplus is foam ceramic material.The intensity of the denitrating catalyst is high, weares and teares low, extends the use time of catalyst, reduce production and the use cost of catalyst；Denitration efficiency is high, and do not contain vanadium, it is to avoid environmental pollution.
Description
Technical field
The present invention relates to gas denitrifying technology field, more particularly to a kind of denitrating catalyst and preparation method thereof.
Background technology
At present, the denitration technology of commercial Application is broadly divided into low NOx combusting technology, SNCR in the world
(SNCR) technology and SCR (SCR) technology.SCR denitration technology has high NOx extrusion rates, is current application
At most, most ripe gas denitrifying technology, the technology is that NH is utilized under conditions of with the presence of catalyst3Deng reducing agent by NOx
It is reduced into N2And H2O, so as to reach removing NOx, eliminates the purpose of pollution.
Catalyst is the core of SCR technology, and its composition composition, structure and relevant parameter directly affect the denitration of SCR technology
Efficiency and running situation.Denitrating catalyst main performance index includes denitration efficiency, service life etc., service life, and this is main
Depending on the intensity of catalyst.The intensity of denitrating catalyst is high, and abrasion is just low, and service life is just long；Conversely, denitrating catalyst
Low intensity, abrasion is just high, and service life is just short.During power plant's use, the abrasion due to flue gas to catalyst, catalyst
Top layer can gradually come off, and cause the effective active matter of catalyst to reduce, denitration efficiency is gradually reduced.
The intensity of current custom catalystses is strong to improve catalyst mainly by controlling a certain amount of binding agent of addition
Degree, wear control is in≤100mg, and catalyst uses duration 24000h, but the intensity of this denitrating catalyst of prior art is still
Have much room for improvement, in the hope of better meeting production and the replacing demand of power plant user.
The A of CN 104368334 disclose a kind of denitrating catalyst and preparation method thereof, and the denitrating catalyst includes catalysis
Agent carrier, the active component being carried in the catalyst carrier and glass fibre, the glass fibre are entrained in the catalysis
In agent carrier and active component；The catalyst carrier includes titanium dioxide, silica and clay；The active component includes
Vanadic anhydride and molybdenum trioxide.The denitrating catalyst includes titanium dioxide, and in catalyst carrier and active component
Glass fibre is doped with, so as to improve the intensity of denitrating catalyst, the abrasion of denitrating catalyst is also just reduced, extends and urge
The use time of agent, reduces production and the use cost of catalyst；Also there is preferable denitration efficiency (78- in addition
86%), and denitrating catalyst abrasion in below 50mg.But the low-temperature denitration efficiency of the denitrating catalyst is not enough
Good, need further research, in addition, also there is vanadic anhydride in the denitrating catalyst, causes urging after use
Agent processing is difficult, pollutes environment.
The content of the invention
It is an object of the invention to provide a kind of denitrating catalyst and preparation method thereof, the denitrating catalyst abrasion compared with
Low, with longer service life, and its denitration efficiency is high, does not contain vanadium, solves catalyst and reclaims the dirt of difficult and environment
The problem of dye.
An object of the present invention is to provide a kind of denitrating catalyst, the denitrating catalyst include catalyst carrier,
The active component and auxiliary agent and glass fibre being carried in the catalyst carrier, the glass fibre are entrained in the catalysis
In agent carrier, active component and auxiliary agent, the catalyst carrier includes foam ceramic material；The active component includes MnO2,
It is described to help active component to include MoO3And Cr2O3；
Also, the gross weight by denitrating catalyst is based on 100%,
The content of the active component is 12-28%, such as 15%, 16%, 18%, 20%, 22%, 25% or 27%；
The content for helping active component is 0.5-6%, such as 1%, 2%, 3%, 4% or 5%；
The content of the glass fibre is 5-18%, such as 6%, 7%, 8%, 9%, 10%, 12%, 14% or 16%；
Surplus is foam ceramic material.
As preferred technical scheme, by denitrating catalyst gross weight for 100% based on,
The content of the active component is 15-22%；
The content for helping active component is 2-4%；
The content of the glass fibre is 10-15%, and surplus is foam ceramic material.
The foam ceramic material is by the zeolite powder of 3-6 parts by weight, the flyash of 1-3 parts by weight, the silicon of 1-3 parts by weight
Ore, 1-4 parts by weight burn lost article and binding agent prepares.As described foam ceramic material by 4 parts by weight zeolite
Powder, the flyash of 2 parts by weight, the silicon ore of 2 parts by weight, 2 parts by weight burn lost article and binding agent is prepared；Or by 5 weights
The zeolite powder of part is measured, the flyash of 2.5 parts by weight, the silicon ore of 2.5 parts by weight, 3 parts by weight burn lost article and binding agent system
It is standby to obtain；Or by the zeolite powder of 4 parts by weight, the flyash of 1.5 parts by weight, the silicon ore of 2.5 parts by weight, 3.5 parts by weight can
Burn lost article and binding agent is prepared.
Preferably, the zeolite powder includes 13X types zeolite and/or modenite.
Preferably, the particle diameter of the zeolite powder is 250-350 mesh, such as 280 mesh, 300 mesh, 320 mesh or 340 mesh.
Preferably, the fly ash grain is in porous grain type shape, and the particle diameter of its particle is 0.5-300 μm, such as 1 μm, 5 μ
M, 10 μm, 50 μm, 100 μm, 160 μm, 200 μm, 240 μm or 280 μm etc., porosity is 50-80%, such as 55%, 60%,
65%th, 70% or 75% etc..
Preferably, the lost article that burns includes coal dust or flour.
Preferably, the binding agent includes bentonite and/or hydroxymethyl cellulose.
MoO in the auxiliary agent3And Cr2O3Mass ratio be 2-5:1, such as 2.5:1、3:1、3.5:1、4:1 or 4.5:1 etc..
Preferably, the length of the glass fibre is 200-500 μm, such as 250 μm, 300 μm, 350 μm, 400 μm or 450 μm
Deng.
The denitrating catalyst is spherical.
Preferably, the average grain diameter of the denitrating catalyst is 500 μm of -5mm, such as 1mm, 1.5mm, 2mm, 2.5mm, 3mm,
3.5mm, 4mm or 4.5mm etc..
An object of the present invention, which is also resided in, provides a kind of preparation method of denitrating catalyst as described above, the preparation
Method comprises the following steps：
A) by MnO2Presoma, MoO3Presoma, Cr2O3Presoma, ammoniacal liquor, water and glass fibre mixture, obtain pug；
B) the obtained pugs of the step a) are impregnated in foam ceramic material, dipping is dried after terminating, and obtains aqueous
Pug of the amount less than 15%；
C) pug of the moisture content for obtaining the step b) less than 15% is calcined, and obtains the denitrating catalyst.
The usage amount of ammoniacal liquor and water is respectively MnO in step a)2Presoma, MoO3Presoma, Cr2O3Presoma gross weight
1-2 times, such as 1.5 times, and 3-6 times, such as 3.5 times, 4 times, 4.5 times or 5 times.
Preferably, the step a) MnO2Presoma is selected from manganese nitrate and/or manganese acetate.
Preferably, the step a) MoO3Presoma is selected from ammonium heptamolybdate.
Preferably, the step a) Cr2O3Presoma is selected from chromic nitrate.
Step b) the dippings are incipient impregnation.
Preferably, the temperature of the step b) dryings is 80-100 DEG C, such as 82 DEG C, 85 DEG C, 88 DEG C, 90 DEG C, 92 DEG C, 95 DEG C
Or 98 DEG C etc..
The water content of the step b) pugs can be 14%, 13%, 10%, 9%, 8%, 7%, 5% or 1% etc..
Step c) is specially：Temperature program(me) is warming up to calcining heat, the obtained moisture content of the step b) is less than
15% pug calcining at constant temperature at calcination temperatures；After the completion of the calcining at constant temperature, cooling obtains denitrating catalyst.
Preferably, the heating rate be 6 DEG C/min~10 DEG C/min, such as 6.5 DEG C/min, 7 DEG C/min, 7.5 DEG C/min,
8 DEG C/min, 8.5 DEG C/min, 9 DEG C/min or 9.5 DEG C/min etc..
Preferably, the rate of temperature fall be 2 DEG C/min~5 DEG C/min, such as 2.5 DEG C/min, 3 DEG C/min, 3.5 DEG C/min, 4
DEG C/min or 4.5 DEG C/min etc..
Preferably, the calcining at constant temperature temperature is 520 DEG C~600 DEG C, such as 550 DEG C, 560 DEG C, 570 DEG C, 580 DEG C or 590
DEG C etc..
Preferably, the time of the calcining is 2~7h, such as 3h, 4h, 5h, 6h or 6.5h.
As preferred technical scheme, the preparation method comprises the following steps：
A) by MnO2Presoma, MoO3Presoma, Cr2O3Presoma, ammoniacal liquor, water and glass fibre mixture, obtain pug,
Wherein, the usage amount of ammoniacal liquor and water is respectively MnO2Presoma, MoO3Presoma, Cr2O31-2 times and 3-6 of presoma gross weight
Times；
B) the pug incipient impregnation for obtaining the step a) is impregnated after terminating in 80-100 in foam ceramic material
Dried under the conditions of DEG C, obtain the pug that water content is less than 15%；
C) pug of the moisture content for obtaining the step b) less than 15% is with 6 DEG C/min~10 DEG C/min heating rate
2-7h is calcined under the conditions of being warming up to 520-600 DEG C, is cooled afterwards with 2 DEG C/min~5 DEG C/min rate of temperature fall, obtains described de-
Denox catalyst.
Compared with prior art, beneficial effects of the present invention are：
High the invention provides denitrating catalyst intensity, the abrasion of catalyst is less than 30mg；
The denitration efficiency for the denitrating catalyst that the present invention is provided is high, up to more than 92%；
The denitrating catalyst that the present invention is provided does not contain vanadium, solves the problem of catalyst reclaims difficult and pollution environment；
The preparation method for the denitrating catalyst that the present invention is provided is simple, suitable for extensive preparation.
Embodiment
The denitrating catalyst provided to further illustrate the present invention with reference to embodiment the present invention and its preparation side
Method is described in detail, but they can not be interpreted as into limiting the scope of the present invention.
In the following embodiments, each raw material is measured using parts by weight, abbreviation part；The raw material used in embodiment is commercially available
Commodity.
Embodiment 1
A kind of denitrating catalyst, including catalyst carrier, the active component that is carried in the catalyst carrier and auxiliary agent
And glass fibre, the glass fibre is entrained in the catalyst carrier, active component and auxiliary agent, the catalyst carrier
Including foam ceramic material；The active component includes MnO2, it is described to help active component to include MoO3And Cr2O3；
Also, the gross weight by denitrating catalyst is based on 100%,
The content of the active component is 12%；
The content for helping active component is 6%；
The content of the glass fibre is 5%；
Surplus is foam ceramic material.
MoO in the auxiliary agent3And Cr2O3Mass ratio be 2:1.
The foam ceramic material is by the zeolite powder of 3 parts by weight, the flyash of 3 parts by weight, the silicon ore of 1 parts by weight, 4
Parts by weight burn lost article and binding agent prepares.
The zeolite powder includes 13X type zeolites.
The particle diameter of the zeolite powder is 250 mesh.
The fly ash grain is in porous grain type shape, and the particle diameter of its particle is 300 μm, and porosity is 50%.
The lost article that burns includes coal dust or flour.
The binding agent includes bentonite.
The length of the glass fibre is 500 μm.
The denitrating catalyst is spherical.
The average grain diameter of the denitrating catalyst is 500 μm.
The preparation method of the denitrating catalyst comprises the following steps：
A) by appropriate manganese nitrate, ammonium heptamolybdate, chromic nitrate, ammoniacal liquor, water and glass fibre mixture, pug is obtained, wherein,
The usage amount of ammoniacal liquor and water is respectively manganese nitrate, ammonium heptamolybdate and 2 times of chromic nitrate gross weight and 3 times；
B) the pug incipient impregnation for obtaining the step a) is impregnated after terminating at 100 DEG C in foam ceramic material
Under the conditions of dry, obtain water content be 13% pug；
C) water content for obtaining the step b) is warming up to 520 DEG C for 13% pug with 6 DEG C/min heating rate,
7h is calcined, is cooled afterwards with 5 DEG C/min rate of temperature fall, obtains the denitrating catalyst.
Embodiment 2
A kind of denitrating catalyst, including catalyst carrier, the active component that is carried in the catalyst carrier and auxiliary agent
And glass fibre, the glass fibre is entrained in the catalyst carrier, active component and auxiliary agent, the catalyst carrier
Including foam ceramic material；The active component includes MnO2, it is described to help active component to include MoO3And Cr2O3；
Also, the gross weight by denitrating catalyst is based on 100%,
The content of the active component is 28%；
The content for helping active component is 0.5%；
The content of the glass fibre is 18%；
Surplus is foam ceramic material.
MoO in the auxiliary agent3And Cr2O3Mass ratio be 5:1.
The foam ceramic material is by the zeolite powder of 3 parts by weight, the flyash of 3 parts by weight, the silicon ore of 1 parts by weight, 4
Parts by weight burn lost article and binding agent prepares.
The zeolite powder includes modenite.
The particle diameter of the zeolite powder is 250 mesh.
The fly ash grain is in porous grain type shape, and the particle diameter of its particle is 300 μm, and porosity is 50%.
The lost article that burns includes coal dust or flour.
The binding agent includes bentonite and hydroxymethyl cellulose.
The length of the glass fibre is 500 μm.
The denitrating catalyst is spherical.
The average grain diameter of the denitrating catalyst is 500 μm.
The preparation method of the denitrating catalyst comprises the following steps：
A) by appropriate manganese acetate, ammonium heptamolybdate, chromic nitrate, chromic nitrate, ammoniacal liquor, water and glass fibre mixture, mud is obtained
Material, wherein, the usage amount of ammoniacal liquor and water is respectively manganese acetate, ammonium heptamolybdate, chromic nitrate and 2 times of chromic nitrate gross weight and 3 times；
B) the pug incipient impregnation for obtaining the step a) is impregnated after terminating in 80 DEG C of bars in foam ceramic material
Dried under part, obtain the pug that water content is 10%；
C) moisture content for obtaining the step b) is warming up to 600 for 10% pug with 10 DEG C/min heating rate
DEG C, 2h is calcined, is cooled afterwards with 2 DEG C/min rate of temperature fall, obtains the denitrating catalyst.
Embodiment 3
A kind of denitrating catalyst, including catalyst carrier, the active component that is carried in the catalyst carrier and auxiliary agent
And glass fibre, the glass fibre is entrained in the catalyst carrier, active component and auxiliary agent, the catalyst carrier
Including foam ceramic material；The active component includes MnO2, it is described to help active component to include MoO3And Cr2O3；
Gross weight by denitrating catalyst for based on 100%,
The content of the active component is 15%；
The content for helping active component is 4%；
The content of the glass fibre is 10%；
Surplus is foam ceramic material.
MoO in the auxiliary agent3And Cr2O3Mass ratio be 2:1.
The foam ceramic material is by the zeolite powder of 6 parts by weight, the flyash of 1 parts by weight, the silicon ore of 3 parts by weight, 1
Parts by weight burn lost article and binding agent prepares.
The zeolite powder includes 13X types zeolite and modenite.
The particle diameter of the zeolite powder is 350 mesh.
The fly ash grain is in porous grain type shape, and the particle diameter of its particle is 0.5 μm, and porosity is 80%.
The lost article that burns includes coal dust or flour.
The binding agent includes bentonite and hydroxymethyl cellulose.
The length of the glass fibre is 200 μm.
The denitrating catalyst is spherical.
The average grain diameter of the denitrating catalyst is 5mm.
The preparation method of the denitrating catalyst comprises the following steps：
A) by appropriate manganese nitrate, ammonium heptamolybdate, chromic nitrate, chromic nitrate, ammoniacal liquor, water and glass fibre mixture, mud is obtained
Material, wherein, the usage amount of ammoniacal liquor and water is respectively manganese nitrate, ammonium heptamolybdate, chromic nitrate and 1 times of chromic nitrate gross weight and 6 times；
B) the pug incipient impregnation for obtaining the step a) is impregnated after terminating in 80 DEG C of bars in foam ceramic material
Dried under part, obtain the pug that water content is 15%；
C) moisture content for obtaining the step b) is warming up to 600 DEG C for 15% pug with 7 DEG C/min heating rate,
2h is calcined, is cooled afterwards with 3 DEG C/min rate of temperature fall, obtains the denitrating catalyst.
Embodiment 4
A kind of denitrating catalyst, including catalyst carrier, the active component that is carried in the catalyst carrier and auxiliary agent
And glass fibre, the glass fibre is entrained in the catalyst carrier, active component and auxiliary agent, the catalyst carrier
Including foam ceramic material；The active component includes MnO2, it is described to help active component to include MoO3And Cr2O3；
Gross weight by denitrating catalyst for based on 100%,
The content of the active component is 22%；
The content for helping active component is 2%；
The content of the glass fibre is 15%；
Surplus is foam ceramic material.
MoO in the auxiliary agent3And Cr2O3Mass ratio be 4:1.
The foam ceramic material is by the zeolite powder of 5 parts by weight, the flyash of 2 parts by weight, the silicon ore of 2 parts by weight, 3
Parts by weight burn lost article and binding agent prepares.
The zeolite powder includes 13X type zeolites.
The particle diameter of the zeolite powder is 300 mesh.
The fly ash grain is in porous grain type shape, and the particle diameter of its particle is 100 μm, and porosity is 60%.
The lost article that burns includes coal dust or flour.
The binding agent includes bentonite.
The length of the glass fibre is 300 μm.
The denitrating catalyst is spherical.
The average grain diameter of the denitrating catalyst is 1mm.
The preparation method of the denitrating catalyst comprises the following steps：
A) by appropriate manganese nitrate, ammonium heptamolybdate, chromic nitrate, chromic nitrate, ammoniacal liquor, water and glass fibre mixture, mud is obtained
Material, wherein, the usage amount of ammoniacal liquor and water is respectively manganese nitrate, ammonium heptamolybdate, chromic nitrate and 1.5 times of chromic nitrate gross weight and 5
Times；
B) the pug incipient impregnation for obtaining the step a) is impregnated after terminating in 90 DEG C of bars in foam ceramic material
Dried under part, obtain the pug that water content is 12%；
C) moisture content for obtaining the step b) is warming up to 550 DEG C for 12% pug with 8 DEG C/min heating rate,
5h is calcined, is cooled afterwards with 4 DEG C/min rate of temperature fall, obtains the denitrating catalyst.
Embodiment 5
A kind of denitrating catalyst, including catalyst carrier, the active component that is carried in the catalyst carrier and auxiliary agent
And glass fibre, the glass fibre is entrained in the catalyst carrier, active component and auxiliary agent, the catalyst carrier
Including foam ceramic material；The active component includes MnO2, it is described to help active component to include MoO3And Cr2O3；
Gross weight by denitrating catalyst for based on 100%,
The content of the active component is 20%；
The content for helping active component is 3%；
The content of the glass fibre is 13%；
Surplus is foam ceramic material.
MoO in the auxiliary agent3And Cr2O3Mass ratio be 4:1.
The foam ceramic material is by the zeolite powder of 5 parts by weight, the flyash of 2 parts by weight, the silicon ore of 2 parts by weight, 3
Parts by weight burn lost article and binding agent prepares.
The zeolite powder includes 13X types zeolite and/or modenite.
The particle diameter of the zeolite powder is 320 mesh.
The fly ash grain is in porous grain type shape, and the particle diameter of its particle is 50 μm, and porosity is 60%.
The lost article that burns includes coal dust or flour.
The binding agent includes hydroxymethyl cellulose.
The length of the glass fibre is 400 μm.
The denitrating catalyst is spherical.
The average grain diameter of the denitrating catalyst is 800 μm.
The preparation method of the denitrating catalyst comprises the following steps：
A) by appropriate manganese acetate, ammonium heptamolybdate, chromic nitrate, chromic nitrate, ammoniacal liquor, water and glass fibre mixture, mud is obtained
Material, wherein, the usage amount of ammoniacal liquor and water is respectively manganese acetate, ammonium heptamolybdate, chromic nitrate and 2 times of chromic nitrate gross weight and 4 times；
B) the pug incipient impregnation for obtaining the step a) is impregnated after terminating in 85 DEG C of bars in foam ceramic material
Dried under part, obtain the pug that water content is 8%；
C) moisture content for obtaining the step b) is warming up to 580 DEG C for 8% pug with 9 DEG C/min heating rate,
5h is calcined, is cooled afterwards with 3 DEG C/min rate of temperature fall, obtains the denitrating catalyst.
Comparative example 1
A kind of denitrating catalyst, based on by the gross weight of denitrating catalyst for 100%,
The content of the active component is 10%；
The content for helping active component is 0.3%；
The content of the glass fibre is 4%, and surplus is that remaining is same as Example 5 outside foam ceramic material.
Comparative example 2
A kind of denitrating catalyst, based on by the gross weight of denitrating catalyst for 100%,
The content of the active component is 29%；
The content for helping active component is 7%；
The content of the glass fibre is 19%, and surplus is that remaining is same as Example 5 outside foam ceramic material.
Comparative example 3
Comparative example 3 is the embodiment 2 in CN 104368334A.
Detect specific surface area, abrasion and the denitration efficiency of the denitrating catalyst obtained by embodiment 1-5 and comparative example 1-3, knot
Fruit is as shown in table 1：
Table 1
As can be seen from Table 1, the denitrating catalyst that the present invention is provided has relatively low abrasion, weares and teares in below 30mg,
The use time of catalyst is extended, catalyst cost is reduced, and the denitration efficiency of the denitrating catalyst is high, it is reachable
More than 92%.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Applicant states that the present invention illustrates the method detailed of the present invention, but not office of the invention by above-described embodiment
It is limited to above-mentioned method detailed, that is, does not mean that the present invention has to rely on above-mentioned method detailed and could implemented.Art
Technical staff it will be clearly understood that any improvement in the present invention, equivalence replacement and auxiliary element to each raw material of product of the present invention
Addition, selection of concrete mode etc., within the scope of all falling within protection scope of the present invention and being open.
Claims (10)
1. a kind of denitrating catalyst, it is characterised in that the denitrating catalyst includes catalyst carrier, is carried on the catalyst
Active component and auxiliary agent and glass fibre on carrier, the glass fibre are entrained in the catalyst carrier, active component
In auxiliary agent, the catalyst carrier includes foam ceramic material；The active component includes MnO2, it is described to help activearm subpackage
Include and MoO3And Cr2O3；
Also, the gross weight by denitrating catalyst is based on 100%,
The content of the active component is 12-28%；
The content for helping active component is 0.5-6%；
The content of the glass fibre is 5-18%, and surplus is foam ceramic material.
2. denitrating catalyst according to claim 1, it is characterised in that by denitrating catalyst gross weight for 100% based on,
The content of the active component is 15-22%；
The content for helping active component is 2-4%；
The content of the glass fibre is 10-15%, and surplus is foam ceramic material.
3. denitrating catalyst according to claim 1 or 2, it is characterised in that the foam ceramic material is by 3-6 weight
Part zeolite powder, the flyash of 1-3 parts by weight, the silicon ore of 1-3 parts by weight, 1-4 parts by weight burn lost article and binding agent system
For what is obtained；
Preferably, the zeolite powder includes 13X types zeolite and/or modenite；
Preferably, the particle diameter of the zeolite powder is 250-350 mesh；
Preferably, the fly ash grain is in porous grain type shape, and the particle diameter of its particle is 0.5-300 μm, and porosity is 50-
80%；
Preferably, the lost article that burns includes coal dust or flour；
Preferably, the binding agent includes bentonite or hydroxymethyl cellulose.
4. the denitrating catalyst according to one of claim 1-3, it is characterised in that MoO in the auxiliary agent3And Cr2O3Matter
Amount is than being 2-5:1；
Preferably, the length of the glass fibre is 200-500 μm.
5. denitrating catalyst according to claim 1, it is characterised in that the denitrating catalyst is spherical；
Preferably, the average grain diameter of the denitrating catalyst is 500 μm of -5mm.
6. the preparation method of the denitrating catalyst according to one of claim 1-5, it is characterised in that the preparation method bag
Include following steps：
A) by MnO2Presoma, MoO3Presoma, Cr2O3Presoma, ammoniacal liquor, water and glass fibre mixture, obtain pug；
B) the obtained pugs of the step a) are impregnated in foam ceramic material, dipping is dried after terminating, and obtains water content small
In 15% pug；
C) pug of the moisture content for obtaining the step b) less than 15% is calcined, and obtains the denitrating catalyst.
7. method according to claim 6, it is characterised in that the usage amount of ammoniacal liquor and water is respectively MnO in step a)2Before
Drive body, MoO3Presoma, Cr2O31-2 times and 3-6 times of presoma gross weight；
Preferably, the step a) MnO2Presoma is selected from manganese nitrate and/or manganese acetate；
Preferably, the step a) MoO3Presoma is selected from ammonium heptamolybdate；
Preferably, the step a) Cr2O3Presoma is selected from chromic nitrate.
8. the method according to claim 6 or 7, it is characterised in that the step b) dippings are incipient impregnation；
Preferably, the temperature of the step b) dryings is 80-100 DEG C.
9. the method according to one of claim 6-8, it is characterised in that step c) is specially：Temperature program(me) is warming up to
Calcining heat, the moisture content that the step b) is obtained is less than 15% pug calcining at constant temperature at calcination temperatures；The constant temperature
After the completion of calcining, cooling obtains denitrating catalyst；
Preferably, the heating rate is 6 DEG C/min~10 DEG C/min；
Preferably, the rate of temperature fall is 2 DEG C/min~5 DEG C/min；
Preferably, the calcining at constant temperature temperature is 520 DEG C~600 DEG C；
Preferably, the time of the calcining is 2~7h.
10. the method according to one of claim 6-9, it is characterised in that the preparation method comprises the following steps:
A) by MnO2Presoma, MoO3Presoma, Cr2O3Presoma, ammoniacal liquor, water and glass fibre mixture, obtain pug, wherein,
The usage amount of ammoniacal liquor and water is respectively MnO2Presoma, MoO3Presoma and Cr2O31-2 times and 3-6 times of presoma gross weight；
B) the pug incipient impregnation for obtaining the step a) is impregnated after terminating in 80-100 DEG C of bar in foam ceramic material
Dried under part, obtain the pug that water content is less than 15%；
C) moisture content for obtaining the step b) is less than 15% pug and heated up with 6 DEG C/min~10 DEG C/min heating rate
2-7h is calcined under the conditions of to 520-600 DEG C, is cooled afterwards with 2 DEG C/min~5 DEG C/min rate of temperature fall, is obtained the denitration and urge
Agent.
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| CN101730575A (en) * | 2007-04-26 | 2010-06-09 | 约翰逊马西有限公司 | transition metal/zeolite scr catalysts |
| CN102489294A (en) * | 2011-12-22 | 2012-06-13 | 国电科学技术研究院 | Low-temperature SCR catalyst prepared by extrusion molding, and preparation method thereof |
| CN102869427A (en) * | 2010-03-11 | 2013-01-09 | 约翰逊马西有限公司 | Disordered molecular sieve supports for the selective catalytic reduction of nox |
| CN106492823A (en) * | 2016-11-17 | 2017-03-15 | 过冬 | A kind of denitrating catalyst and preparation method thereof |
| CN106512989A (en) * | 2016-11-17 | 2017-03-22 | 过冬 | Denitration catalyst and preparation method thereof |
| CN106694024A (en) * | 2016-11-17 | 2017-05-24 | 过冬 | Denitration catalyst and preparation method thereof |
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2017
- 2017-06-23 CN CN201710484240.7A patent/CN107138174A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101730575A (en) * | 2007-04-26 | 2010-06-09 | 约翰逊马西有限公司 | transition metal/zeolite scr catalysts |
| CN102869427A (en) * | 2010-03-11 | 2013-01-09 | 约翰逊马西有限公司 | Disordered molecular sieve supports for the selective catalytic reduction of nox |
| CN102489294A (en) * | 2011-12-22 | 2012-06-13 | 国电科学技术研究院 | Low-temperature SCR catalyst prepared by extrusion molding, and preparation method thereof |
| CN106492823A (en) * | 2016-11-17 | 2017-03-15 | 过冬 | A kind of denitrating catalyst and preparation method thereof |
| CN106512989A (en) * | 2016-11-17 | 2017-03-22 | 过冬 | Denitration catalyst and preparation method thereof |
| CN106694024A (en) * | 2016-11-17 | 2017-05-24 | 过冬 | Denitration catalyst and preparation method thereof |
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