CN107199031A - It is a kind of to improve denitrating catalyst of intensity and preparation method thereof - Google Patents
It is a kind of to improve denitrating catalyst of intensity and preparation method thereof Download PDFInfo
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- CN107199031A CN107199031A CN201710432130.6A CN201710432130A CN107199031A CN 107199031 A CN107199031 A CN 107199031A CN 201710432130 A CN201710432130 A CN 201710432130A CN 107199031 A CN107199031 A CN 107199031A
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- source presoma
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- 239000003054 catalyst Substances 0.000 title claims abstract description 127
- 238000002360 preparation method Methods 0.000 title claims abstract description 38
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 38
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000002156 mixing Methods 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 36
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 35
- 239000010936 titanium Substances 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 32
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000010937 tungsten Substances 0.000 claims abstract description 31
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 28
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000013019 agitation Methods 0.000 claims abstract description 10
- 239000002243 precursor Substances 0.000 claims abstract description 7
- 239000012065 filter cake Substances 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 239000008367 deionised water Substances 0.000 claims abstract description 3
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 23
- 230000010355 oscillation Effects 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 13
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 241000196324 Embryophyta Species 0.000 claims 1
- 244000275012 Sesbania cannabina Species 0.000 claims 1
- 238000005406 washing Methods 0.000 abstract description 22
- 206010001497 Agitation Diseases 0.000 abstract description 9
- 239000003546 flue gas Substances 0.000 abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 7
- 230000008021 deposition Effects 0.000 abstract description 6
- 229910001385 heavy metal Inorganic materials 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 77
- 239000002002 slurry Substances 0.000 description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 21
- 238000000034 method Methods 0.000 description 21
- 238000004523 catalytic cracking Methods 0.000 description 18
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 15
- 239000002253 acid Substances 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 14
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 14
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 13
- 235000011114 ammonium hydroxide Nutrition 0.000 description 12
- 238000001556 precipitation Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 150000002500 ions Chemical class 0.000 description 10
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 8
- DUFCMRCMPHIFTR-UHFFFAOYSA-N 5-(dimethylsulfamoyl)-2-methylfuran-3-carboxylic acid Chemical compound CN(C)S(=O)(=O)C1=CC(C(O)=O)=C(C)O1 DUFCMRCMPHIFTR-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 description 6
- 238000000975 co-precipitation Methods 0.000 description 5
- 238000000151 deposition Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000011149 active material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910001930 tungsten oxide Inorganic materials 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 241000219782 Sesbania Species 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 210000002700 urine Anatomy 0.000 description 3
- HKDNWUIPCSLYAA-UHFFFAOYSA-N [W].[Zr].[Ti].[V] Chemical compound [W].[Zr].[Ti].[V] HKDNWUIPCSLYAA-UHFFFAOYSA-N 0.000 description 2
- GMTALJIKFKYVMV-UHFFFAOYSA-N [Zr].[Ti].[W] Chemical compound [Zr].[Ti].[W] GMTALJIKFKYVMV-UHFFFAOYSA-N 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 2
- VVRQVWSVLMGPRN-UHFFFAOYSA-N oxotungsten Chemical class [W]=O VVRQVWSVLMGPRN-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 2
- BIWXPGNTDGJSBH-UHFFFAOYSA-N 2-hydroxypropane-1,2,3-tricarboxylic acid;zirconium Chemical compound [Zr].OC(=O)CC(O)(C(O)=O)CC(O)=O BIWXPGNTDGJSBH-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- BNUDRLITYNMTPD-UHFFFAOYSA-N acetic acid;zirconium Chemical compound [Zr].CC(O)=O BNUDRLITYNMTPD-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000010237 hybrid technique Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005360 mashing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- FTWGTNVTSDGLFG-UHFFFAOYSA-N nitric acid zirconium Chemical compound [Zr].O[N+]([O-])=O FTWGTNVTSDGLFG-UHFFFAOYSA-N 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- WKXHZKXPFJNBIY-UHFFFAOYSA-N titanium tungsten vanadium Chemical compound [Ti][W][V] WKXHZKXPFJNBIY-UHFFFAOYSA-N 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- 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
- B01J23/16—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
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/30—Tungsten
-
- B01J35/64—
-
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Abstract
The invention discloses a kind of denitrating catalyst for improving intensity and preparation method thereof, step is as follows：(1) titanium source presoma is dissolved；(2) zirconium source presoma is dissolved；(3) tungsten source presoma is dissolved, and it is well mixed with the solution of step (1), (2)；(4) regulation solution ph precipitates, filtered, washing and to obtain filter cake to 8~13 after step (3) is mixed；(5) deionized water is added in filter cake obtained by step (4), is tuned into pulpous state, add vanadium source precursor solution, dried, be calcined after mixing, form powder；(6) by the powder mixing pulp of solution and the step (5) of the formation of tungsten source presoma, after stirring, plus pore creating material, after secondary agitation, sealing and standing, dry roasting obtain denitrating catalyst.Denitrating catalyst prepared by the present invention can both improve catalyst strength, can resist the heavy metal in flue gas in its surface nonuniform deposition, improve catalyst performance.
Description
Technical field
The present invention relates to a kind of denitrating catalyst for improving intensity and preparation method thereof, especially a kind of resistance flue gas
Uneven denitrating catalyst of middle vanadium deposition and preparation method thereof, the invention belongs to New Inorganic Materials technical field.
Background technology
Nitrogen oxides (NOx) it is one of main atmosphere pollution, emission request is increasingly strict.China《" 12 " are saved
Can the comprehensive programme of work of emission reduction》Middle regulation：By 2015, national discharged nitrous oxides total amount declined 10% than 2010.
The GB13223-2001 that the national environmental protection of in September, 2011 portion is promulgated《Fossil-fuel power plant atmospheric pollutant emission standard》Thermal power plant NOx is arranged
Put concentration and make more strict requirements：Newly-built the 3rd period, enlarging, the coal-burning boiler of reconstruction are provided, NOx highests allow discharge
Concentration is 100mg/m3.What national environmental protection portion was promulgated《Petroleum refining industry pollutant emission standard》It is required that：On July 1st, 2015
Rise, nitrogen oxides requirement is less than 200mg/m in newly-built catalytic cracking unit discharge regenerated flue gas3, special emission limit requires small
In 100mg/m3, on July 1st, 2017, existing enterprise also performed the standard.In numerous gas denitrifying technologies, selective catalysis is also
The technology that it is still international mainstream that former method (Selective Catalytic Reduction, SCR), which is, its NOxRemoval efficiency is reachable
To 80%~90%.Wherein, denitrating catalyst is the core of SCR technology, and developed country just have developed in the eighties in last century
For a series of denitrating catalysts of coal characteristics, boiler type etc., many R＆D institutions of China are coal-fired for China with enterprise
Boiler and catalytic cracking flue gas situation have also carried out a series of research, and develop some denitrating catalysts.
CN201010537130 proposes the method that denitrating catalyst is prepared using hydrothermal method, first by titanium source presoma
With the mixing of tungsten source presoma, it is placed in autoclave and carries out hydro-thermal reaction, be filtered, washed and dried and obtain titanium tungsten powder denitration catalyst
Agent, while can also introduce the elements such as vanadium and molybdenum, prepares multi-metal-oxide catalyst.Catalyst activity component prepared by this method
Crystal grain is small, specific surface area is larger, but by being sufficiently mixed process material aggregation extent of the same race may be caused higher due to no
Phenomenon occurs, and certain influence is had on catalyst activity.
CN201110345605 proposes a kind of preparation method of denitrating catalyst, and tungsten is sequentially added into metatitanic acid slurry
Sour ammonium, ammonium molybdate and ammonium metavanadate, ultrasonic wave mashing, then pH value is adjusted to 4.0~6.5, stand, separate, drying is catalyzed
Agent powder.This method technique is simple, cost is low, but ammonium metavanadate is added with solid, and the dissolubility of vanadium is still to be tested, and vanadium disperses
Although activity very high, SO when uneven2/SO3Conversion ratio can be higher, influences catalyst performance.
CN201210400949 proposes a kind of preparation method of titanium dioxide-tungstic acid composite granule, by para-tungstic acid
Ammonium salt solution is added in metatitanic acid slurries, and directly vacuum drying obtains finished product after stirring.This method technique is simple, but titanium-tungsten
Mixing intensity is relatively low, and the performance to material can have a certain impact.
In summary, the preparation of denitrating catalyst is directed to the mixing of Multimetal oxide, hybrid mode and technique
Difference can not distinguish the denitration performance of catalyst, NO completelyxConversion ratio can reach more than 90%, illustrate special metal oxygen
The catalytic activity of compound is higher, and scattered inequality can still obtain higher NOxConversion ratio.The quality of catalyst overall performance is also
Need to be verified from otherwise sign, while the preparation of catalyst will also take into account the operability of industry amplification.
The content of the invention
It is a primary object of the present invention to provide a kind of denitrating catalyst for improving intensity and preparation method thereof, to overcome
The unbalanced defect in denitrating catalyst activated centre in high-temperature flue gas in the prior art, and catalyst of the present invention can support
Barium oxide improves catalyst strength again in its surface nonuniform deposition in anti-flue gas, improves catalyst performance.
The object of the present invention is achieved like this, a kind of preparation method for the denitrating catalyst for improving intensity, the catalysis
The preparation method of agent comprises the following steps：
(1) titanium source presoma is dissolved to form solution；
(2) zirconium source presoma is dissolved to form solution；
(3) tungsten source presoma is dissolved to form solution, and it is well mixed with the solution of step (1), (2)；
(4) the well mixed rear solution of step (3) is adjusted into pH value to 8~13, precipitated, filter cake is washed to obtain in filtering；
(5) deionized water is added in filter cake obtained by step (4), is tuned into pulpous state, add vanadium source precursor solution, mixing is equal
After even, it is dried, is calcined, forms powder；
(6) by powder mixing pulp of the solution of tungsten source presoma formation with step (5), after stirring, plus pore creating material,
After secondary agitation, sealing and standing, drying, roasting form denitrating catalyst.
Titanium source presoma, tungsten source presoma, vanadium source presoma, zirconium source presoma, pore creating material are used in the present invention
Denitrating catalyst prepares conventional material in the prior art, and consumption selects appropriate amount also according to process characteristic, and the present invention is
It is not any limitation as especially.The present invention also recommended preferred scheme.
The preparation method of denitrating catalyst of the present invention, wherein, the titanium source presoma be preferably titanyl sulfate or
Metatitanic acid, the step (1) forms solution with TiO2Meter, content is preferably 15~40g/L.
The preparation method of denitrating catalyst of the present invention, wherein step (2) the zirconium source presoma are preferably nitric acid
Zirconium, acetic acid zirconium or citric acid zirconium, presoma formation solution in the zirconium source is with ZrO2Meter, titanium source presoma is with TiO2Meter, step (2)
The mass ratio of zirconium source used presoma and titanium source presoma is preferably 2.0~10.0:100.
The preparation method of denitrating catalyst of the present invention, wherein step (3) the tungsten source presoma are preferably secondary tungsten
Sour ammonium or ammonium metatungstate, tungsten source presoma is with WO3Meter, titanium source presoma is with TiO2Before meter, tungsten source used presoma and titanium source
The mass ratio for driving body is preferably 2.0~5.0:100.
The preparation method of denitrating catalyst of the present invention, wherein in the step (3), step (5) and step (6)
Hybrid mode be mechanical agitation mixing, fluid dynamic mixing or and supersonic oscillations mixing, the mixing of step (3) and step (5)
Time is preferably 0.5~3h, and the incorporation time of step (6) is preferably 0.5~2h, and the sealing and standing time of step (6) is best
For 8~30h.
The preparation method of denitrating catalyst of the present invention, wherein, in the vanadium source precursor solution in the step (5)
Vanadium source presoma is preferably ammonium metavanadate or ammonium vanadate, and vanadium source presoma is with V2O5Meter, the titanium source presoma is with TiO2
The mass ratio of meter, vanadium source presoma consumption and titanium source presoma consumption is preferably 3~8.0:100.
The preparation method of denitrating catalyst of the present invention, wherein, pH value adjusts medicament used most in the step (4)
It is well ammoniacal liquor or potassium hydroxide, pH value is preferably 8~13 after regulation.
The preparation method of denitrating catalyst of the present invention, wherein, sintering temperature in the step (5) and step (6)
It it is preferably 400~650 DEG C, roasting time is preferably 4~10h.
Before tungsten source presoma used in the preparation method of denitrating catalyst of the present invention, wherein step (6) and titanium source
It is preferably 0.5~2 to drive body mass ratio:100.
The preparation method of denitrating catalyst of the present invention, wherein, the pore creating material added in the step (6) is can
With but be not limited to urea, activated carbon, sesbania powder, preferably urea.Pore creating material and titanium source forerunner's body mass ratio are preferably 0.5~2:
100。
Present invention also offers a kind of denitrating catalyst for improving intensity and preparation method thereof, it is that above-mentioned denitration is urged
Prepared by the preparation method of agent.
Beneficial effects of the present invention：
(1) using the method for mixing in situ, titanium atom and zirconium atom is mixed in molecule rank, cause follow-up co-precipitation
During the crystal intensity, the hardness that produce high (catalyst crushing strength can reach 30.2kg/cm2), be conducive to active material
Scattered and enhancing stability, beneficial to the performance of catalytic activity；
(2) method mixed using ultrasonic assistant, is more uniformly distributed the mixing of various materials atomic level；
(3) vanadium source is added when zirconium source, titanium source, tungsten source co-precipitation material are not calcined, and vanadium source is on zirconium-titanium-tungsten particle surface
Infiltration is deeper, connects closer, disperses evenly, and fired rear catalyst intensity is higher, activity is more stable；
(4) the vanadium tungsten zirconium titanium powder material prepared covers tungsten oxide layer after being once calcined, and on its surface, simultaneously
Pore creating material is added, makes catalyst particle surface that there are more tungsten oxides to adhere to, is received while also possessing abundant spatial network shape
Meter level micropore.
Embodiment
Embodiments of the invention are elaborated below：The present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and process, but protection scope of the present invention is not limited to following embodiments, following implementation
The experimental method of unreceipted actual conditions in example, generally according to normal condition.
Titanium source precursor solution：
In the present invention, solution is formed in titanium source presoma vitriolization, there is no particular restriction to titanium source presoma, generally limit
It is set in titanyl sulfate or metatitanic acid, titanium source precursor solution with TiO2Meter, titanium source presoma is preferably 15~40g/L.If small
In 15g/L, then solution is too dilute, and the combination of other materials is more loose, and production efficiency is relatively low；If more than 40g/L, due to dense
Du Taigao and reduced with the mixing intensities of other materials, cause fusion bad.
Catalyst sample and catalytic cracking spent catalyst hybrid technique：Screening takes 20 after the fresh catalyst of preparation is crushed
~40 mesh powders；Vanadium in 40~60 mesh powders, catalytic cracking spent catalyst is taken after catalytic cracking spent catalyst (LDC series) screening
Oxide content about 1%.Two kinds of powders in mass ratio 1:1 mixing, in air atmosphere, at 350 DEG C, mixes 24h, sieves afterwards
Go out catalyst powder to be evaluated.Fresh catalyst is contacted in mixed process with waste acetic acid, can be split useless catalysis
Change catalyst in active material vanadium it is uneven be transferred on fresh catalyst, cause fresh catalyst surface reactive material vanadium
Oxide concentrates accumulation, causes catalyst Topically active to strengthen, and then can increase the SO of catalyst2/SO3Conversion ratio, reduces denitration
Catalyst overall performance.
NOxConversion ratio appreciation condition：Air speed 20000h-1, 350 DEG C of reaction temperature, air inlet NOxFor 600mg/Nm3、SO2For
1000mg/Nm3, ammonia nitrogen ratio be that 1, water content is 10%.
NOx、SO2Method for measurement of concentration：Flue gas continuous on-line analysis instrument, Siemens ULTRAMAT23.
SO2/SO3Conversion ratio assay method：Wet desulfurization of flue gas by limestone-gypsum method device performance acceptance test specification (DL/
T998-2006)。
Crushing strength method of testing, is tested according to HG/T2782-2011 standards.
Following examples are that the present invention is illustrated, and " % " described in embodiment and comparative example refers to quality percentage and contained
Amount.
Embodiment 1：
It will contain with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution, is formed and is contained TiO2For 35g/L solution, and
It will contain with ZrO212g zirconium nitrate solutions are counted, adds and contains with WO3It is gradually added after counting 15g secondary tungsten acid ammonium solution, mechanical agitation 2h
Ammoniacal liquor adjusts pH value to 9.5, after precipitation is complete, filtering, washing；Material after washing is spent into ion water making into moisture content again is
50% slurry, is added with V2O5Count after 15g ammonium metavanadate solution, mechanical agitation 1.5h, convection drying, be calcined at 620 DEG C
8h；After roasting powder again with WO3Aqueous 30% slurry is made in meter 4.5g ammonium metatungstate solution, and 4g urine is added after stirring
Denitrating catalyst is obtained after element, stirring 60min, sealing and standing 24h, drying, 620 DEG C of roasting 8h.The catalyst crushing strength is
30.2kg/cm2.Above-mentioned gained fresh catalyst and commented respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst
Valency, the results are shown in Table 1 data.
Comparative example 1：
Zirconium source is added without in catalyst preparation process, will be contained with TiO2It is molten that meter 500g titanyl sulfate is dissolved in sulfuric acid
In liquid, formed and contain TiO2For 35g/L solution, add and contain with WO3It is gradually added after counting 15g secondary tungsten acid ammonium solution, mechanical agitation 2h
Ammoniacal liquor adjusts pH value to 9.5, after precipitation is complete, filtering, washing；Material after washing is spent into ion water making into moisture content again is
50% slurry, is added with V2O5Count after 15g ammonium metavanadate solution, mechanical agitation 1.5h, convection drying, be calcined at 620 DEG C
8h；After roasting powder again with WO3Aqueous 30% slurry is made in meter 4.5g ammonium metatungstate solution, and 4g urine is added after stirring
Denitrating catalyst is obtained after element, stirring 60min, sealing and standing 24h, drying, 620 DEG C of roasting 8h.The catalyst crushing strength is
25.4kg/cm2.Above-mentioned gained fresh catalyst and commented respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst
Valency, the results are shown in Table 1 data.
Embodiment 2
It will contain with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution, is formed and is contained TiO2For 40g/L solution, and
It will contain with ZrO220.5g zirconium acetate solutions are counted, adds and contains with WO3Count after 10g secondary tungsten acid ammonium solution, supersonic oscillations 2h progressively
Add ammoniacal liquor and adjust pH value to 9.5, after precipitation is complete, filtering, washing；Material after washing is spent into ion water making into moisture content again
For 50% slurry, add with V2O5Count 25g ammonium metavanadate solution, supersonic oscillations 1.5h while stirring, convection drying
Afterwards, 8h is calcined at 600 DEG C；After roasting powder again with WO3Aqueous 40% slurry, stirring is made in meter 8g ammonium metatungstate solution
Denitrating catalyst is obtained after adding 3g sesbania powders, stirring 40min, sealing and standing 18h, drying, 550 DEG C of roasting 8h afterwards.The catalysis
Agent crushing strength is 31.3kg/cm2.Above-mentioned gained fresh catalyst and urge after being mixed with catalytic cracking vanadium-containing wasting catalyst high temperature
Agent is evaluated respectively, the results are shown in Table 1 data.
Comparative example 2
Vanadium source is added after being calcined in first time, will be contained with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution,
Formed and contain TiO2For 40g/L solution, and it will contain with ZrO220.5g zirconium acetate solutions are counted, adds and contains with WO3Count 10g para-tungstic acid
Ammoniacal liquor is gradually added after ammonium salt solution, supersonic oscillations 2h and adjusts pH value to 9.5, precipitation completely after, filtering, washing, dry after,
8h is calcined at 600 DEG C；Powder is added with V after roasting2O5Count 25g ammonium metavanadate solution, then with WO3Count 8g ammonium metatungstate
Aqueous 40% slurry mixing is made in solution, and 3g sesbania powders, stirring 40min, sealing and standing 18h, drying, 550 are added after stirring
DEG C roasting 8h after obtain denitrating catalyst.The catalyst crushing strength is 30.5kg/cm2Above-mentioned gained fresh catalyst and with urging
Change cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst to evaluate respectively, the results are shown in Table 1 data.
Embodiment 3
It will contain with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution, is formed and is contained TiO2For 40g/L solution, and
It will contain with ZrO222.5g zirconium acetate solutions are counted, adds and contains with WO3Count after 15g secondary tungsten acid ammonium solution, supersonic oscillations 2h progressively
Add ammoniacal liquor and adjust pH value to 10, after precipitation is complete, filtering, washing；Material after washing is spent into ion water making into moisture content again
For 40% slurry, add with V2O5Count 35g ammonium metavanadate solution, supersonic oscillations 1.5h while stirring, convection drying
Afterwards, 8h is calcined at 550 DEG C；After roasting powder again with WO3Aqueous 40% slurry is made in meter 2.5g secondary tungsten acid ammonium solution, stirs
Denitrating catalyst is obtained after 4g activated carbons, stirring 40min, sealing and standing 10h, drying, 500 DEG C of roasting 5h are added after mixing.It is above-mentioned
Gained fresh catalyst and evaluated respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst, the results are shown in Table 1 data.
Comparative example 3
The process of catalyst is prepared only with being once calcined, will be contained with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid
In solution, formed and contain TiO2For 40g/L solution, and it will contain with ZrO222.5g zirconium acetate solutions are counted, adds and contains with WO3Count 15g
Secondary tungsten acid ammonium solution, ammoniacal liquor is gradually added after supersonic oscillations 2h and adjusts pH value to 10, precipitation completely after, filtering, washing；Again
Material after washing is spent into ion water making into the slurry that moisture content is 40%, added with V2O535g ammonium metavanadate solution is counted, is stirred
While mixing after supersonic oscillations 1.5h, then with WO3Aqueous 40% slurry mixing is made in meter 2.5g secondary tungsten acid ammonium solution,
Denitrating catalyst is obtained after 4g activated carbons, stirring 40min, sealing and standing 10h, drying, 500 DEG C of roasting 5h are added after stirring.On
State gained fresh catalyst and evaluated respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst, the results are shown in Table 1 number
According to.
Embodiment 4
It will contain with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution, is formed and is contained TiO2For 40g/L solution, and
It will contain with ZrO210g zirconium acetate solutions are counted, adds and contains with WO3Count and progressively add after 10g secondary tungsten acid ammonium solution, mechanical agitation 0.5h
Enter ammoniacal liquor and adjust pH value to 9.0, after precipitation is complete, filtering, washing；Material after washing is spent into ion water making into moisture content again is
50% slurry, is added with V2O5Count after 40g ammonium metavanadate solution, supersonic oscillations 3h while stirring, convection drying, 650
10h is calcined at DEG C；After roasting powder again with WO3Aqueous 40% slurry is made in meter 10g ammonium metatungstate solution, adds after stirring
Denitrating catalyst is obtained after entering 10g urea, stirring 1.5h, sealing and standing 30h, drying, 650 DEG C of roasting 10h.Above-mentioned gained is fresh
Catalyst and evaluated respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst, the results are shown in Table 1 data.
Comparative example 4
Pore creating material is added without after being once calcined, will be contained with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution,
Formed and contain TiO2For 40g/L solution, and it will contain with ZrO210g zirconium acetate solutions are counted, adds and contains with WO3Count 10g ammonium paratungstate
Ammoniacal liquor is gradually added after solution, mechanical agitation 0.5h and adjusts pH value to 9.0, after precipitation is complete, filtering, washing；After washing again
Material spends ion water making into the slurry that moisture content is 50%, adds with V2O540g ammonium metavanadate solution is counted, while stirring
After supersonic oscillations 3h, convection drying, 10h is calcined at 650 DEG C；After roasting powder again with WO3Count 10g ammonium metatungstate solution
Denitrating catalyst is obtained after aqueous 40% slurry, stirring 1.5h, sealing and standing 30h, drying, 650 DEG C of roasting 10h are made.On
State gained fresh catalyst and evaluated respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst, the results are shown in Table 1 number
According to.
Embodiment 5
It will contain with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution, is formed and is contained TiO2For 35g/L solution, and
It will contain with ZrO250g zirconium nitrate solutions are counted, adds and contains with WO3Count and progressively add after 50g secondary tungsten acid ammonium solution, supersonic oscillations 2h
Enter ammoniacal liquor and adjust pH value to 10.5, after precipitation is complete, filtering, washing；Material after washing is spent into ion water making into moisture content again
For 50% slurry, add with V2O5Count after 15g ammonium metavanadate solution, supersonic oscillations 1h while stirring, convection drying,
4h is calcined at 400 DEG C；After roasting powder again with WO3Aqueous 40% slurry, stirring is made in meter 2.5g ammonium metatungstate solution
Denitrating catalyst is obtained after adding 2.5g urea, stirring 40min, sealing and standing 8h, drying, 400 DEG C of roasting 4h afterwards.Above-mentioned gained
Fresh catalyst and evaluated respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst, the results are shown in Table 1 data.
Comparative example 5
Tungsten source presoma is once added, will be contained with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution, shape
Into containing TiO2For 35g/L solution, and it will contain with ZrO250g zirconium nitrate solutions are counted, adds and contains with WO3Count 52.5g ammonium paratungstate
Ammoniacal liquor is gradually added after solution, supersonic oscillations 2h and adjusts pH value to 10.5, after precipitation is complete, filtering, washing；After washing again
Material spends ion water making into the slurry that moisture content is 50%, adds with V2O515g ammonium metavanadate solution is counted, while stirring
After supersonic oscillations 1h, convection drying, 4h is calcined at 400 DEG C；Aqueous 40% slurry is made in powder after roasting, adds 2.5g urine
Denitrating catalyst is obtained after element, stirring 40min, sealing and standing 8h, drying, 400 DEG C of roasting 4h.Above-mentioned gained fresh catalyst and
Evaluated respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst, the results are shown in Table 1 data.
Embodiment 6
It will contain with TiO2Meter 500g titanyl sulfate is dissolved in sulfuric acid solution, is formed and is contained TiO2For 40g/L solution, and
It will contain with ZrO225g zirconium acetate solutions are counted, adds and contains with WO3Count after 17.5g secondary tungsten acid ammonium solution, supersonic oscillations 1h progressively
Add ammoniacal liquor and adjust pH value to 9.5, after precipitation is complete, filtering, washing；Material after washing is spent into ion water making into moisture content again
For 50% slurry, add with V2O5Count after 27g ammonium metavanadate solution, supersonic oscillations 2h while stirring, convection drying,
7h is calcined at 550 DEG C；After roasting powder again with WO3Aqueous 40% slurry, stirring is made in meter 5.5g ammonium metatungstate solution
Denitrating catalyst is obtained after adding 5.5g urea, stirring 40min, sealing and standing 17h, drying, 550 DEG C of roasting 7h afterwards.Above-mentioned institute
Obtain fresh catalyst and evaluated respectively with catalytic cracking vanadium-containing wasting catalyst high temperature mixing rear catalyst, the results are shown in Table 1 data.
The embodiment of table 1 and comparative example evaluating data contrast table
Found by embodiment and comparative example：The denitrating catalyst that the resistance vanadium deposition of embodiment is uneven has good effect
Really, it is preliminary by ultrasonic wave mixing in situ, the mixing rank of active material is reached molecule rank, slightly evacuated through co-precipitation
Nano particle, then introduce barium oxide in particle surface and shallow-layer, catalyst intermediate obtained after roasting, then in pore creating material
In the presence of strengthen NO in final catalyst, evaluating catalyst is produced after introducing co-catalyst, roasting againxConversion ratio in ammonia nitrogen
Than for 1 when, up to more than 99%, through with after catalytic cracking vanadium-containing wasting catalyst mixed processing, SO2/SO3Conversion ratio does not almost have
Increase, illustrates that catalyst surface does not almost produce the polycrystalline deposition of barium oxide, catalyst performance is excellent；Denitrating catalyst system
In Preparation Method, if being handled without (6) step, only retain vanadium tungsten titanium catalyst sample after being calcined for the first time, it is useless containing vanadium through catalytic cracking
After catalyst mixed processing, SO2/SO3Conversion ratio has increased slightly；If being not added with pore creating material in the processing of (6) step, contain through catalytic cracking
After vanadium dead catalyst mixed processing, SO2/SO3Conversion ratio also has increased slightly；If catalyst is in preparation process, using being once calcined
Form, or vanadium source is added after being once calcined, catalyst NO in evaluation procedurexConversion ratio be slightly decreased, while SO2/
SO3Conversion ratio has increased slightly.In a word, the catalyst after the fresh denitrating catalyst for preparing of the present invention and processing is commented with the conditions of
During valency, SO2/SO3Conversion ratio is lower than other comparative examples, the effect with barium oxide nonuniform deposition in good anti-flue gas
Really.
Add zirconium source presoma in mixed process in the original location it can be seen from embodiment and comparative example crushing strength data
Afterwards, catalyst crushing strength is significantly increased.
Beneficial effects of the present invention：
(1) using the method for mixing in situ, titanium atom and zirconium atom is mixed in atomic level, cause follow-up co-precipitation
During the crystal intensity, the hardness that produce it is high, be conducive to the scattered and enhancing stability of active material, beneficial to the hair of catalytic activity
Wave；
(2) method mixed using ultrasonic assistant, is more uniformly distributed the mixing of various materials atomic level；
(3) vanadium source is added when zirconium source, titanium source, tungsten source co-precipitation material are not calcined, and vanadium source is on zirconium-titanium-tungsten particle surface
Infiltration is deeper, connects closer, disperses evenly, and fired rear catalyst intensity is higher, activity is more stable；
(4) the vanadium tungsten zirconium titanium powder material prepared entered after once roasting, and covered tungsten oxide layer on its surface, simultaneously
Pore creating material is added, makes catalyst particle surface that there are more tungsten oxides to adhere to, is received while also possessing abundant spatial network shape
Meter level micropore.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art
The protection domain of the claims in the present invention should all be belonged to.
Claims (10)
1. a kind of preparation method for the denitrating catalyst for improving intensity, it is characterised in that the preparation method comprises the following steps：
(1) titanium source presoma is dissolved to form solution；
(2) zirconium source presoma is dissolved to form solution；
(3) tungsten source presoma is dissolved to form solution, and it is well mixed with the solution of step (1), (2)；
(4) the well mixed rear solution of step (3) is adjusted into pH value to 8~13, precipitated, filter cake is washed to obtain in filtering；
(5) deionized water is added in filter cake obtained by step (4), is tuned into pulpous state, added vanadium source precursor solution, be well mixed
Afterwards, it is dried, is calcined, forms powder；
(6) by powder mixing pulp of the solution of tungsten source presoma formation with step (5), after stirring, plus pore creating material, it is secondary
After stirring, sealing and standing, drying, roasting form denitrating catalyst.
2. preparation method according to claim 1, it is characterised in that step (2) the zirconium source presoma is with ZrO2Meter, titanium
Source presoma is with TiO2Meter, the mass ratio of zirconium source presoma and titanium source presoma used in step (2) is 2.0~10.0:100.
3. preparation method according to claim 1, it is characterised in that step (3) the tungsten source presoma is with WO3Meter, titanium source
Presoma is with TiO2Meter, the mass ratio of tungsten source presoma and titanium source presoma used in step (3) is 2.0~5.0:100.
4. preparation method according to claim 1, it is characterised in that in the step (3), step (5) and step (6)
Hybrid mode be mechanical agitation mixing, fluid dynamic mixing or and supersonic oscillations mixing.
5. preparation method according to claim 1, it is characterised in that in the vanadium source precursor solution in the step (5)
Vanadium source presoma is with V2O5Meter, the titanium source presoma is with TiO2The quality of meter, vanadium source presoma consumption and titanium source presoma consumption
Than for 3~8.0:100.
6. preparation method according to claim 1, it is characterised in that the titanium source presoma is with TiO2Meter, the pore creating material
It is 0.5~2 with titanium source forerunner body mass ratio:100.
7. preparation method according to claim 1, it is characterised in that sintering temperature is in step (5) and step (6)
400~650 DEG C, roasting time is 4~10h.
8. preparation method according to claim 1, it is characterised in that tungsten source presoma is with WO3Meter, titanium source presoma with
TiO2Tungsten source presoma used and titanium source forerunner body mass ratio are 0.5~2 in meter, step (6):100.
9. preparation method according to claim 1, it is characterised in that pore creating material is one in urea, activated carbon, sesbania powder
Plant or several, the addition of pore creating material is 0.5~1.5 with the mass ratio of titanium source presoma:100.
10. a kind of denitrating catalyst for improving intensity, it is the system of the denitrating catalyst described in any one of claim 1 to 9
What Preparation Method was prepared.
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