CN107433197A - A kind of denitration catalyst, preparation method and its usage - Google Patents
A kind of denitration catalyst, preparation method and its usage Download PDFInfo
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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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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- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- B01J23/28—Molybdenum
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Abstract
The present invention relates to a kind of denitration catalyst, preparation method and its usage.The catalyst includes cerium titanium bimetal composite oxide carrier and is supported on the active component transition metal oxide of carrier surface, wherein, the mol ratio of cerium and titanium atom is 0.2, and transition metal oxide is that mass ratio is 1~3:1 molybdenum oxide and cadmium oxide.It with butyl titanate etc. is titanium source that methods described, which includes, cerous nitrate or cerous sulfate etc. are cerium source, simultaneously using transition metal salt, deionized water, ethanol and concentrated hydrochloric acid as raw material, it is stirred by solution, the step such as air evaporation self assembly and drying and roasting, and preferably further increases the shaping strength of catalyst using end gardening technology.The catalyst of the present invention is used for having shorter preparation time in regenerated flue gas denitration SCR reactions, and higher low-temperature reactivity, anti-dust scouring capability is strong, and application prospect is preferable.
Description
Technical field
The present invention relates to denitration technology, specifically, the present invention relates to a kind of denitration catalyst, preparation method and its
Purposes, belong to environmental technology field.
Background technology
Catalytic cracking (FCC) device is the significant element in crude oil depth process, and act foot is occupied in petroleum refining industry
The status of weight.During catalytic cracking reaction, while cracking occurs for feedstock oil, wherein 30%~50% nitrogen
Compound enters oil coke, and is deposited on catalyst surface therewith.Catalyst activity reduction because of surface attachment oil coke, it is necessary to carry out
Regeneration treatment.In regenerator burning process, most of nitrogen-containing compound is converted into N2, but also there is 10%~30% to be converted into
NOx, discharged with regenerated flue gas, main component NO, percentage by volume is about 90%, and residue 10% or so is NO2.According to raw material
With the difference of operating condition, NO in regenerated flue gasxConcentration is there is also difference, but generally higher than national standard, and is not equipped with cigarette
Qi exhaustion nitre facility.On the other hand, due to the adverse effect developed rapidly with crude oil in poor quality of crude oil processing industry, oil refining enterprise
NOxDischarge capacity is increasing.Generally, regenerated flue gas is oil plant NOxThe main source of discharge, accounts for its total release
50%.Up to now, CNPC shares 41 sets of FCC apparatus, and for total productive capacity up to 50,800,000 tons/year, regenerated flue gas discharge is total
Amount is more than 5,000,000 Nm3/ h, NOxAnnual emissions are about 1.2 ten thousand tons.If handled using gas denitrifying technology it, with
NOxClearance calculates for 80%, only this item, so that it may realize group company NOxDischarge capacity reduces by 10%.It can be seen that FCC regenerates cigarette
NO in gasxEmission problem has turned into the common problem of each oil refining enterprise of CNPC, seriously constrains CNPC's energy-conservation
What emission reduction and clean manufacturing worked pushes ahead.It is contemplated that increasingly strict with environmental protection standard, CNPC respectively refines oil
Enterprise will expand rapidly to the production requirement of FCC regenerated flue gas denitration technologies.
At present, also the FCC regenerated flue gas denitration technologies of commercial Application include both at home and abroad：Low NOxBurn technology, oxidation
Absorption process, addition auxiliary agent method, SNCR (SNCR) method and SCR (SCR) method.
Five kinds of FCC regenerated flue gas denitration technologies features are different, are respectively suitable for different treatment conditions and processing requirement,
Need to be selected with suiting measures to local conditions.But for the existing 41 sets of FCC apparatus of CNPC, to solve on the whole
Regenerated flue gas denitration problem, SCR (SCR) is because for the treatment of effect stabilization, wide adaptation range, technical maturity, undoubtedly
Be most competitive technology in SCR technology, key issue is to select excellent catalyst.The use of catalyst is not only
The NO in flue gas can be madexContent reduces, and reduces atmosphere pollution, and also determine denitration efficiency.Select appropriate catalyst
Equipment investment can be not only saved, the reproduction quality and fume afterheat utilization ratio of catalyst can also be improved.
At present, industrialized SCR catalyst is used based on vanadium titanium type oxide catalyst, achieves remarkable result.But
Not only light-off temperature is high for vanadium titanium class catalyst, and V2O5Contribute to SO in flue gas2Oxidation and N2O formation, thus
Cause catalyst life to shorten and selective the defects of reducing is equally obvious, the progress that unfavorable SCR reacts.Moreover, flue gas takes off
Nitre SCR technology is highly developed, but its investment and operating cost are still very high, limit the development and application of SCR technology.And
In recent years, for oxide catalyst because of its short preparation period, cost is low, it is easy to operate the advantages that receive significant attention.Therefore, open
Hair can substantially reduce the low-temperature SCR catalyst of cost, and the oxide catalyst for finding non-vanadium class is still to solve these to ask
The main path of topic.
The content of the invention
Based on this, an object of the present invention is to provide a kind of denitration catalyst, and it is compound that it includes cerium titanium bimetallic
Oxide carrier and the active component transition metal oxide for being supported on carrier surface, wherein, the mol ratio of cerium and titanium atom
For 0.2, transition metal oxide is the mixture of molybdenum oxide and cadmium oxide, the mass ratio of the molybdenum oxide and chromium oxide for 1~
3:1, the load capacity of active component transition metal oxide is 0~5wt%, and does not include 0, in the range of the load capacity, reaction
Activity is best.
The load capacity of the active component such as 0.5wt%, 1wt%, 1.5wt%, 2wt%, 2.5wt%, 3wt%,
3.5wt%, 4wt% or 4.5wt%.
In the present invention, in order to control catalyst to have good activity, it is 0.2 to control the mol ratio of cerium and titanium atom.
Transition metal oxide is the mixture of molybdenum oxide and cadmium oxide, and the mass ratio of the molybdenum oxide and chromium oxide is 1
~3:1, such as 1.2:1、1.5:1、1.8:1、2.1:1、2.5:1、2.8:1 or 2.9:1 etc..
The present invention is by using cerium titanium bimetal composite oxide as carrier, the molybdenum oxide and chromium oxide of special ratios
Mixture be active component, and control the mol ratio of cerium and titanium atom be 0.2, utilize the activearm of carrier and special ratios
/ mating reaction, and active component transition metal oxide is directly dispersing in cerium titanium bimetal composite oxide carrier
Surface, good dispersion, effectively utilized its catalytic action, so as to get the active temperature window of catalyst compared with
Width, low temperature active is preferable, while has that reference area is big, heat endurance is high and N2The advantages that selectivity is high.
Between 250 DEG C~450 DEG C of the catalytic activity of the catalyst, NO conversion ratios can reach more than 90%, N2Selectivity
It can reach 100%.
In the present invention, the catalyst is the supported oxide catalyst of Nano grade.
Preferably, the catalyst has a meso-hole structure, and average pore size is 7~15nm, for example, 8nm10 nanometers, 12nm or
14nm。
The second object of the present invention is to provide a kind of preparation method of denitration catalyst as described above, the side
Method includes the preparation of cerium titanium bimetal composite oxide carrier, active component transition metal oxide is supported on carrier surface
And the optionally process of end gardening.
Preferably, the method that cerium titanium bimetal composite oxide carrier is prepared using sol-gal process is comprised the following steps：
(1) titanium source is added in absolute ethyl alcohol, through being sufficiently stirred, is designated as solution A；
(2) cerium source is dissolved into the mixed liquor of deionized water and absolute ethyl alcohol, is designated as B solution；
(3) solution A and solution B are mixed, are sufficiently stirred, the pH value for the mixed solution for adjusting to obtain is to 1~2, to suppress
The hydrolysis rate of organic titanium source, continue to stir, be then aged obtained mixed solution, dry, roasting, obtain the double gold of cerium titanium
Belong to composite oxide carrier.
Preferably, the titanium source is organic titanium source, further preferred butyl titanate.
Preferably, the cerium source is cerous nitrate or/and cerous sulfate.
Preferably, the time being sufficiently stirred in step (3) is 60~120min, for example, 70min, 80min, 90min,
100min or 110min.
Preferably, by realizing that pH value is adjusted to mixed solution and dripping concentrated hydrochloric acid or acetic acid in step (3), preferably
Concentrated hydrochloric acid is added dropwise and realizes that pH value is adjusted.
Preferably, the time for continuing stirring in step (3) is 60~120min, for example, 70min, 80min, 90min,
100min or 110min.
Preferably, step (3) is aged in surface plate.
Preferably, step (3) is aged in atmosphere, and digestion time is 18~48h, for example, 20h, 22h, 26h,
28h, 30h, 32h, 35h, 38h, 40h, 42h, 44h or 46h.
Preferably, the temperature dried in step (3) is 80~120 DEG C, and drying time is 8~12h.
Preferably, sintering temperature described in step (3) be 350~500 DEG C, such as 370 DEG C, 390 DEG C, 410 DEG C, 430
DEG C, 450 DEG C, preferably 470 DEG C or 490 DEG C, 500 DEG C, roasting time is 3~6h, for example, 3.3h, 3.6h, 3.9h, 4.2h,
4.6h, 5h, 5.4h or 5.8h, preferably 4h.
The exemplary method that cerium titanium bimetal composite oxide carrier is prepared using sol-gal process includes following step
Suddenly：
Titanium source is added in absolute ethyl alcohol first, through being sufficiently stirred, is designated as solution A；Then, cerium source is dissolved into
In the mixed liquor of ionized water and absolute ethyl alcohol, B solution is designated as；After solution A and B are mixed, 60~120min is sufficiently stirred, so
Concentrated hydrochloric acid is added drop-wise in above-mentioned solution dropwise afterwards, after regulation pH value to 1~2, continues 60~120min of stirring, then will stir
Uniform mixed solution is mixed to be transferred in surface plate, after being aged 18~48h in air, dry 12h at 80~100 DEG C, 500
DEG C roasting 4h, obtain cerium titanium bimetal composite oxide carrier.
Preferably, make active component transition metal oxide be supported on the method for carrier surface to comprise the following steps：
Weigh transition metal salt and be made into aqueous solution C, then C solution is added drop-wise to cerium titanium bimetal composite oxide dropwise
In carrier and stir, ultrasound, dry, roasting, obtain FCC regenerated flue gas denitration catalyst.
Preferably, the cerium titanium bimetal composite oxide carrier is by following pretreatment：By cerium titanium bimetallic composite oxygen
Compound carrier dries 5~8h at 50~100 DEG C in preferably 80 DEG C of baking ovens.
Preferably, the control of roasting process heating rate is in 0.5~2 DEG C/min, for example, 0.6 DEG C/min, 0.8 DEG C/min,
1.0 DEG C/min, 1.2 DEG C/min, 1.4 DEG C/min, 1.6 DEG C/min or 1.8 DEG C/min, sintering temperature is 350~500 DEG C, such as
370 DEG C, 390 DEG C, 410 DEG C, 430 DEG C, 450 DEG C, 470 DEG C or 490 DEG C, roasting time is 3~6h, such as 3.3h, 3.6h,
3.9h, 4.2h, 4.5h, 4.8h, 5.1h, 5.4h or 5.7h.
The exemplary method for making active component transition metal oxide be supported on carrier surface comprises the following steps：
Cerium titanium bimetal composite oxide carrier is placed in 80 DEG C of baking ovens and dries 5~8h, transition metal salt is weighed and is made into
Aqueous solution C, then C solution is added drop-wise to dropwise in dried cerium titanium bimetal composite oxide carrier and stirred,
Then it is transferred to through ultrasound and after drying in Muffle furnace and target temperature 350~500 is risen to 0.5~2 DEG C/min heating rate
DEG C, and 3~6h of constant temperature at such a temperature, obtain FCC regenerated flue gas denitration catalyst.
Catalyst after load active component is subjected to end gardening, the shaping strength of catalyst can be improved, and make to urge
Agent has high anti-dust scouring capability.
Exemplary end gardening method is：By the end of catalyst 20% Ludox hardening pond in immersion 20~
40 minutes, such as 30 minutes, the length of end gardening was 500~800mm, such as 800mm.
The third object of the present invention is to provide a kind of purposes of denitration catalyst as described above, and it is used for FCC again
Raw denitrating flue gas.
Compared with the prior art, the present invention has the advantages that：
The denitration of the present invention is compared with catalyst than common vanadium tungsten titanium catalyst, and its active temperature windows is wider, low temperature
Active preferably NO conversion ratios reach more than 90% between 250 DEG C~450 DEG C, while have reference area big and N2Selectivity is high
The advantages of (selectivity is more than 90%), and there is high anti-dust scouring capability.
In addition, the synthetic method of the catalyst is simple, short preparation period, there is preferable application prospect.
Embodiment
Technical scheme is further illustrated below by embodiment.
The activity test method of catalyst：Sieving is ground after catalyst tabletting, takes the part of 40~60 mesh.Experiment is even
Carried out on the dynamic fixed bed reactors of afterflow, the catalyst after specifically 0.4g is sieved is encased in quartz glass tube, in pipe
Temperature carries out temperature programming control by tube type resistance furnace and temperature controller.Mixed gas simulates true flue gas, as the steel corresponding to it
Bottle provides.Corresponding mixed gas, which forms, is： CNO=CNH3=1000ppm, CO2=3%, Balance Air N2, volume space velocity is
16000h-1.NO concentration value is imported and exported by ThermoFisher 42iHL NO analyzer on-line checkings.NO conversion ratios it is specific
Calculation formula is as follows：
The molybdenum oxide of embodiment 1 and cadmium oxide (mass ratio 1:1) system of cerium-carrying titanium bimetal composite oxide catalyst
Standby (Ce/Ti=0.2)
15g butyl titanates are added in 30ml absolute ethyl alcohols first, are sufficiently stirred, are designated as solution A.Then, weigh
0.3817g cerous nitrate is dissolved into the mixed liquor of 1ml deionized waters and 10ml absolute ethyl alcohols, is designated as B solution.By solution A and
After B mixing, 60-120min is sufficiently stirred, then concentrated hydrochloric acid is added drop-wise in above-mentioned solution dropwise, after adjustment pH value to 1,
Continue to stir 60-120min, then the above-mentioned solution to stir is transferred in surface plate, 18-48h is aged in air
Afterwards, 12h is dried at 100 DEG C, 500 DEG C of roasting 4h, obtains cerium titanium bimetal composite oxide carrier.
The cerium titanium bimetal composite oxide carrier for weighing 4g above-mentioned preparation is placed in 80 DEG C of baking ovens after 6 h of drying, is claimed
Take ammonium molybdate 0.1023g and cadmium acetate 0.1095g to be made into aqueous solution C, then C solution is added drop-wise to dropwise it is dried and
In cerium titanium bimetal composite oxide carrier through cooling treatment, stirred when being added dropwise, be then transferred to horse through ultrasound and after drying
500 DEG C of target temperature, and constant temperature 6h at such a temperature are not risen to 2 DEG C/min heating rate in stove, obtain FCC regeneration cigarettes
Qi exhaustion nitre catalyst.
The molybdenum oxide of embodiment 2 and cadmium oxide (mass ratio 2:1) preparation of cerium-carrying titanium bi-metal oxide catalyst
(Ce/Ti=0.3)
The synthesis step of cerium titanium bimetal composite oxide carrier is the same as embodiment 1.
The cerium titanium bimetal composite oxide carrier for weighing 4g above-mentioned preparation is placed in 80 DEG C of baking ovens after 6 h of drying, is claimed
Take and weigh ammonium molybdate 0.2046g and cadmium acetate 0.1095g and be made into aqueous solution C, be then added drop-wise to C solution dropwise dried
And in the above-mentioned material through cooling treatment, while be added dropwise while stir, then through ultrasound, drying after be transferred in Muffle furnace with 2 DEG C/
Min heating rate rises to 500 DEG C of target temperature, and constant temperature 6h at such a temperature, obtains FCC regenerated flue gas denitration catalysis
Agent.
The molybdenum oxide of embodiment 3 and cadmium oxide (mass ratio 3:1) preparation of cerium-carrying titanium bi-metal oxide catalyst
(Ce/Ti=0.2)
The synthesis step of cerium titanium bimetal composite oxide carrier is the same as embodiment 1.
The cerium titanium bimetal composite oxide carrier for weighing 4g above-mentioned preparation is placed in 80 DEG C of baking ovens after 6 h of drying, is claimed
Take ammonium molybdate 0.3069g and cadmium acetate 0.1095g to be made into aqueous solution C, then C solution is added drop-wise to dropwise it is dried and
In above-mentioned material through cooling treatment, stir when being added dropwise, be then transferred to after ultrasonic, dry in Muffle furnace with 2 DEG C/min's
Heating rate rises to 500 DEG C of target temperature, and constant temperature 6h at such a temperature, obtains FCC regenerated flue gas denitration catalyst.
The molybdenum oxide of embodiment 4 and cadmium oxide (mass ratio 2.5:1) preparation of cerium-carrying titanium bi-metal oxide catalyst
(Ce/Ti=0.2)
The synthesis step of cerium titanium bimetal composite oxide carrier is the same as embodiment 1.
The cerium titanium bimetal composite oxide carrier for weighing 4g above-mentioned preparation is placed in 80 DEG C of baking ovens after 6 h of drying, is claimed
Take ammonium molybdate 0.2558g and cadmium acetate 0.1095g to be made into aqueous solution C, then C solution is added drop-wise to dropwise it is dried and
In cerium titanium bimetal composite oxide carrier through cooling treatment, stirred when being added dropwise, be then transferred to horse after ultrasonic, dry
500 DEG C of target temperature, and constant temperature 6h at such a temperature are not risen to 2 DEG C/min heating rate in stove, obtain FCC regeneration cigarettes
Qi exhaustion nitre catalyst.
The molybdenum oxide of embodiment 5 and cadmium oxide (mass ratio 1.5:1) preparation of cerium-carrying titanium bi-metal oxide catalyst
(Ce/Ti=0.2)
The synthesis step of cerium titanium bimetal composite oxide carrier is the same as embodiment 1.
The cerium titanium bimetal composite oxide carrier for weighing 4g above-mentioned preparation is placed in 80 DEG C of baking ovens after 6 h of drying, is claimed
Take ammonium molybdate 0.1534g and cadmium acetate 0.1095g to be made into aqueous solution C, then C solution is added drop-wise to dropwise it is dried and
In above-mentioned material through cooling treatment, stir when being added dropwise, be then transferred to after ultrasonic, dry in Muffle furnace with 2 DEG C/min's
Heating rate rises to 500 DEG C of target temperature, and constant temperature 6h at such a temperature, obtains FCC regenerated flue gas denitration catalyst.
Comparative example 1
Nano-cerium oxide is prepared using sol-gal process, and using infusion process obtain nano-cerium oxide carrier and
It is supported on the catalyst of the cadmium oxide of carrier surface.
Comparative example 2
Nano titanium oxide is prepared using sol-gal process, and nano TiO 2 carrying body is obtained using infusion process
And it is supported on the catalyst of the cadmium oxide of carrier surface.
Comparative example 3
In addition to ammonium molybdate is replaced with into the cadmium acetate of phase homogenous quantities, remaining is same as Example 3.
Comparative example 4
In addition to cadmium acetate is replaced with into the ammonium molybdate of phase homogenous quantities, remaining is same as Example 3.
Comparative example 5
Remaining is same as Example 5, is 0.15 except Ce and Ti atomic molars ratio is controlled.
Comparative example 6
Remaining is same as Example 5, is 0.25 except Ce and Ti atomic molars ratio is controlled.
Comparative example 7
Except the mass ratio for controlling molybdenum oxide and cadmium oxide is 0.5:1, remaining is same as Example 3.
Comparative example 8
Except the mass ratio for controlling molybdenum oxide and cadmium oxide is 3.5:1, remaining is same as Example 3.
Catalytic activity investigation is carried out to embodiment 1-5 and the catalyst of comparative example 1~8, specific performance is as shown in table 1：
Table 1
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 disclosing.
Claims (10)
1. a kind of denitration catalyst, its activity for including cerium titanium bimetal composite oxide carrier and being supported on carrier surface
Component transition metal oxide, wherein, the mol ratio of cerium and titanium atom is 0.2, and transition metal oxide is molybdenum oxide and oxidation
The mixture of cadmium, the mass ratio of the molybdenum oxide and cadmium oxide is 1~3:1, the load capacity of active component transition metal oxide
For 0~5wt%, and do not include 0.
2. catalyst as claimed in claim 1, it is characterised in that the catalyst has meso-hole structure, average pore size 7-
15nm。
3. a kind of preparation method of FCC regenerated flue gas denitration catalyst as claimed in claim 1 or 2, methods described include
The preparation of cerium titanium bimetal composite oxide carrier, make active component transition metal oxide be supported on carrier surface and optionally
The process of ground end gardening.
4. method as claimed in claim 3, it is characterised in that cerium titanium bimetal composite oxide is prepared using sol-gal process
Carrier, the preparation method comprise the following steps：
(1) titanium source is added in absolute ethyl alcohol, through being sufficiently stirred, is designated as solution A；
(2) cerium source is dissolved into the mixed liquor of deionized water and absolute ethyl alcohol, is designated as B solution；
(3) solution A and solution B are mixed, are sufficiently stirred, adjusted the obtained pH value of mixed solution to after 1~2, continue to stir,
Then obtained mixed solution is aged, dried, roasting, obtain cerium titanium bimetal composite oxide carrier.
5. method as claimed in claim 4, it is characterised in that the titanium source is organic titanium source, the further preferred fourth of metatitanic acid four
Ester；
Preferably, the cerium source is cerous nitrate or/and cerous sulfate；
Preferably, the time being sufficiently stirred in step (3) is 60~120min；
Preferably, preferably it is added dropwise dense in step (3) by realizing that pH value is adjusted to mixed solution and dripping concentrated hydrochloric acid or acetic acid
Hydrochloric acid realizes that pH value is adjusted；
Preferably, the time for continuing stirring in step (3) is 60~120min.
6. the method as described in claim 4 or 5, it is characterised in that step (3) is aged in surface plate；
Preferably, step (3) is aged in atmosphere, and digestion time is 18~48h；
Preferably, the temperature dried in step (3) is 80~120 DEG C, drying time 8-12h；
Preferably, sintering temperature described in step (3) be 350-500 DEG C, preferably 500 DEG C, roasting time 3-6h, preferably 4h.
7. the method as described in one of claim 3-6, it is characterised in that make active component transition metal oxide be supported on load
The method in body surface face comprises the following steps：
Weigh transition metal salt and be made into aqueous solution C, be then added drop-wise to C solution dropwise in cerium titanium bimetal composite oxide carrier
And stir, ultrasound, dry, roasting, obtain FCC regenerated flue gas denitration catalyst.
8. method as claimed in claim 7, it is characterised in that the cerium titanium bimetal composite oxide carrier is by following pre-
Processing：
By cerium titanium bimetal composite oxide carrier at 50-100 DEG C, 5~8h is dried in preferably 80 DEG C of baking ovens；
Preferably, the control of roasting process heating rate is 350~500 DEG C in 0.5~2 DEG C/min, sintering temperature, and roasting time is
3~6h.
9. the method as described in one of claim 3-8, it is characterised in that end gardening method is：Carrier surface is loaded with
The end of the catalyst of active component is soaked 20-40 minutes in 20% Ludox hardening pond, and the length 500 of end gardening~
800mm。
10. a kind of purposes of FCC regenerated flue gas denitration catalyst as claimed in claim 1 or 2, it is used for FCC regeneration cigarettes
Qi exhaustion nitre.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107597198A (en) * | 2017-09-11 | 2018-01-19 | 北京方信立华科技有限公司 | A kind of SCR denitration hardening hydrosol and preparation method thereof and method for curing |
| CN108126707A (en) * | 2017-12-28 | 2018-06-08 | 东北大学 | A kind of low temperature, SCR denitration, the preparation method and application that nontoxic, composite oxides are carrier |
| CN112295555A (en) * | 2020-10-30 | 2021-02-02 | 大连理工大学 | A cerium-titanium composite nanorod catalyst for fixed source flue gas denitration reaction and preparation method thereof |
| CN114082394A (en) * | 2020-08-25 | 2022-02-25 | 大连佳纯气体净化技术开发有限公司 | A kind of desulfurization adsorbent and its preparation method and application |
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