CN101954290A - Novel composite carrier SCR flue gas denitration catalyst - Google Patents

Novel composite carrier SCR flue gas denitration catalyst Download PDF

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CN101954290A
CN101954290A CN 201010260914 CN201010260914A CN101954290A CN 101954290 A CN101954290 A CN 101954290A CN 201010260914 CN201010260914 CN 201010260914 CN 201010260914 A CN201010260914 A CN 201010260914A CN 101954290 A CN101954290 A CN 101954290A
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catalyst
mass percent
tio
flue gas
oxalic acid
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王戈
张晓伟
杨穆
高鸿毅
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University of Science and Technology Beijing USTB
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Abstract

The invention belongs to the field of environmental protection and environmental catalysis, and in particular relates to a novel composite carrier SCR flue gas denitration catalyst. An SCR flue gas denitration catalyst which takes TiO2-mesoporous SiO2 as a compound carrier is obtained by preparing the TiO2-mesoporous SiO2 by hydrolyzing tetrabutyl titanate in mesoporous SiO2 by adopting a sol-gel method, taking the TiO2-mesoporous SiO2 as the compound carrier of the SCR catalyst, supporting a cocatalyst on the TiO2-mesoporous SiO2 compound carrier, and finishing the supporting of a main catalyst. The catalyst comprises the following components in percentage by mass: 85 to 99.9 percent of the compound carrier, 0 to 5 percent of the cocatalyst and 0.1 t0 10 percent of the main catalyst, wherein the compound carrier consists 80 to 95 weight percent of the mesoporous SiO2 and 5 to 20 weight percent of the TiO2. The introduction of the mesoporous SiO2 greatly increases the specific area of the catalyst; and the catalyst has high dispersibility of active substance and high stability, contributes to a gas to enter pores to fully react with the catalyst because the carrier has regular pore structures, and has high denitration performance.

Description

A kind of NEW TYPE OF COMPOSITE carrier S CR catalyst for denitrating flue gas
Technical field
The invention belongs to environmental protection and environmental catalysis field, be specifically related to a kind of with TiO 2-mesoporous SiO 2The SCR catalyst that is applicable to the power-plant flue gas denitration for carrier.
Background technology
Nitrogen oxide (NOx) is one of main atmosphere pollution, comprises NO, NO 2, N 2O, N 2O 3And N 2O 4Deng, mainly with NO and NO 2Form exist, wherein NO accounts for 90% of NOx total amount.The discharging of nitrogen oxide can cause environmental problems such as acid rain, greenhouse effects and depletion of the ozone layer, serious harm human health and social development.
At present, the denitration technology of commercial Application mainly is divided into low NOx combusting technology, SNCR technology and SCR technology in the world.SCR (SCR) denitration technology has high NOx removal efficiency, be use in the world at most, the most ripe gas denitrifying technology.This technology is to utilize NH under the condition that has catalyst to exist 3Deng reducing agent NOx is reduced into N 2And H 2O removes NOx thereby reach, the purpose of pollution abatement.Catalyst is the core in the SCR system, is the key of denitration technology, its one-tenth is grouped into, structure, life-span and relevant parameter directly influence the SCR system denitration efficiency and ruuning situation; Economically, the initial cost cost of catalyst accounts for the 40-60% of project investment, and life of catalyst is determining the operating cost of SCR system.
The SCR catalyst is divided into noble metal type, metal oxide type and zeolite molecular sieve type by its composition.Extensive use at present mainly be metal oxide type catalyst, wherein, vanadium titanium class catalyst has active high, significant advantage such as selectivity is good, anti-poisoning ability is strong, becomes the commercial SCR catalyst of main flow.Vanadium titanium class SCR catalyst is to have anatase structured TiO 2As carrier, be divided into following a few class: V usually by its chemical composition 2O 5-WO 3/ TiO 2, V 2O 5-MoO 3/ TiO 2, V 2O 5-WO 3-MoO 3/ TiO 2, wherein especially with V 2O 5-WO 3/ TiO 2Research is used more.
The patent about the SCR denitrating catalyst of having applied at present, is a lot.From disclosed patent, the kind of carrier of catalyst is a lot, and commonly used have a TiO 2, Al 2O 3, SiO 2, molecular sieve and active carbon or the like.Wherein, because TiO 2(especially anatase) has very high stability and very strong sulfur poisoning-resistant ability, so its research and application are many.In the preparation technology of nano catalyst honeycomb (CN101703927A) patent, adopt infusion process with active constituent loading at TiO 2On make composite granule, with blending method composite granule is mixed extruding honeycomb catalyst again with additive; In composite carrier flue gas selective catalytic reduction denitrating catalyst and preparation method thereof (CN101428212A), nano-anatase mine-titanium oxide and/or cordierite and/or ceramic fibre complex carrier have been adopted; Also have TiO 2Load on the bentonite as complex carrier, such as patent denitrating catalyst and preparation method thereof (CN1872413A).
No matter be with single TiO 2Still adopting complex carrier as carrier, generally all is to adopt at TiO 2Powder surface dipping active component, not only the carrier consumption is big, and exists specific area little, and active component is disperseed inhomogeneous, and active component combines shortcomings such as not tight with carrier.
Summary of the invention
At above problem, the purpose of this invention is to provide a kind of with TiO 2Load on mesoporous SiO 2On, TiO 2Advantage of self and mesoporous SiO 2Advantages such as specific area is big, even aperture distribution and pore size are adjustable are got up, and prepare with TiO 2-mesoporous SiO 2SCR catalyst for denitrating flue gas for complex carrier.
Technical scheme of the present invention is: a kind of NEW TYPE OF COMPOSITE carrier S CR catalyst for denitrating flue gas, and this catalyst comprises following composition by mass percentage:
Complex carrier 85～99.9%
Major catalyst 0.1～15%.
Described primary catalyst component is V 2O 5, CeO 2, CuO and/or MnOx; Major catalyst obtains by adding the major catalyst precursor; Described major catalyst precursor is ammonium metavanadate, cerous nitrate, cerium chloride, copper nitrate, copper chloride, manganese acetate and/or manganese nitrate.
Further, described composition also the amount of comprising percentage be 0～5% co-catalyst; The composition of described co-catalyst is MoO 3, WO 3And/or Cr 2O 3 Co-catalyst obtains by adding the co-catalyst precursor, and described co-catalyst precursor is ammonium molybdate, ammonium tungstate and/or ammonium chromate.
Described complex carrier is the mesoporous SiO of 80～95wt% by mass percent 2With mass percent be the TiO of 5～20wt% 2Form.
Described mesoporous SiO 2The MCM-41 or the SBA-15 that comprise hexagonal structure.
Concrete preparation method specifically may further comprise the steps:
Step 1: preparation TiO 2-mesoporous SiO 2Complex carrier:
Mesoporous SiO 2Press the preparation of the described method of document (wherein, the preparation of MCM-41 is with reference to J.S.Beck.et.J.Am.Chem.Sot.1992,114,10834-10843, the preparation of SBA-15 is with reference to Dongyuan Zhao.et.J.Am.Chem.Soc.1998,120,6024-6036), with the Powdered mesoporous SiO that obtains 2Ultrasonic being scattered in the absolute ethyl alcohol adds butyl titanate and glacial acetic acid again, and strong agitation 0.5～2h under the room temperature dropwise adds deionized water afterwards, continues stirring reaction 2～4h, makes the abundant hydrolysis of butyl titanate.In the reaction system, mesoporous SiO 2Mass percent be 4.2～9.5%, butyl titanate mass percent be 1.1～8.9%, the mass percent of absolute ethyl alcohol is 49.4～85.0%, glacial acetic acid mass percent be 2.1～9.0%, the mass percent of deionized water is 5.1～34.4%.Reaction finishes, and product is used deionized water and absolute ethyl alcohol eccentric cleaning successively, and is dry under 60～100 ℃, calcines 3～6h down, obtains TiO for 400～500 ℃ 2-mesoporous SiO 2Complex carrier;
Step 2: the load of co-catalyst
Oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with the co-catalyst precursor under 30～60 ℃ of conditions ultrasonic dissolution in oxalic acid solution.The TiO that step 1) is prepared 2-mesoporous SiO 2The complex carrier powder joins in the above-mentioned oxalic acid solution, 50～70 ℃ of 4～6h that reflux under stirring condition.In the reaction system, the mass percent of oxalic acid is 0.9～2.0%, and the mass percent of deionized water is 87.3～99.0%, and the mass percent of co-catalyst precursor is 0～2.4%, TiO 2-mesoporous SiO 2The mass percent of complex carrier is 0～9.0%.Back flow reaction finishes, and dries under 70～100 ℃, grinds broken back and calcines 3～6h down at 400～500 ℃, obtains Zhu Cuihuaji @TiO 2-mesoporous SiO 2Powder;
Step 3: the load of major catalyst
Oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with the major catalyst precursor under 30～50 ℃ of conditions ultrasonic dissolution in oxalic acid solution, then with step 2) the Zhu Cuihuaji @TiO that makes 2-mesoporous SiO 2Powder joins in the oxalic acid solution, 50～70 ℃ of 4～6h that reflux under the stirring condition.Wherein, the mass percent of oxalic acid is 1.7～4.8%, and the mass percent of deionized water is 83.3～98.0%, Zhu Cuihuaji @TiO 2-mesoporous SiO 2Mass percent be 0.1～9.0%, the mass percent of major catalyst salt is 0.01～4.7%.Back flow reaction finishes, and dries under 70～100 ℃ again, grinds broken back and calcines 3～6h down at 400～500 ℃, obtains the SCR denitrating catalyst.The invention has the advantages that: the present invention adopts sol-gel process to make butyl titanate at mesoporous SiO 2Middle hydrolysis prepares TiO 2-mesoporous SiO 2, with this complex carrier as the SCR catalyst.Then, preparation co-catalyst solution through reaction and calcining, loads on TiO with co-catalyst 2-mesoporous SiO 2On the complex carrier.At last, preparation major catalyst solution through reaction and calcining, is finished the load of major catalyst, finally forms with TiO 2-mesoporous SiO 2Be the SCR denitrating catalyst of complex carrier, this catalyst has advantages such as specific area is big, good dispersion, stability is high, catalytic activity is good, can be used for denitrating flue gas.
Specific embodiments
Embodiment 1
V 2O 5-WO 3@TiO 2-MCM-41 Preparation of catalysts:
1) be scattered in the absolute ethyl alcohol Powdered MCM-41 is ultrasonic, add butyl titanate and glacial acetic acid again, strong agitation 0.5h under the room temperature dropwise adds deionized water afterwards, continues stirring reaction 2h, makes the abundant hydrolysis of butyl titanate.In the reaction system, the mass percent of MCM-41 is 8.3%, butyl titanate mass percent be 3.6%, the mass percent of absolute ethyl alcohol is 70.3%, glacial acetic acid mass percent be 3.3%, the mass percent of deionized water is 14.5%.Reaction finishes, and product is used deionized water and absolute ethyl alcohol eccentric cleaning successively, and is dry under 60 ℃, calcines 4h down, obtains TiO for 400 ℃ 2-MCM-41 complex carrier;
2) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium paratungstate under 50 ℃ of conditions ultrasonic dissolution in oxalic acid solution.The TiO that step 1) is prepared 2-MCM-41 complex carrier powder joins in the above-mentioned oxalic acid solution, 70 ℃ of backflow 6h under stirring condition.In the reaction system, the mass percent of oxalic acid is 0.9%, and the mass percent of deionized water is 89.7%, and the mass percent of ammonium paratungstate is 0.4%, and the mass percent of complex carrier is 9.0%.Back flow reaction finishes, and dries under 80 ℃, grinds broken back and calcines 4h down at 450 ℃, obtains WO 3@TiO 2The powder of-MCM-41.
3) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium metavanadate under 40 ℃ of conditions ultrasonic dissolution in oxalic acid solution, then with step 2) WO that makes 3@TiO 2-MCM-41 powder joins in the oxalic acid solution, the following 70 ℃ of backflow 6h of stirring condition.Wherein, the mass percent of oxalic acid is 2.7%, and the mass percent of deionized water is 88.4%, WO 3@TiO 2The mass percent of-MCM-41 is 8.8%, and the mass percent of ammonium metavanadate is 0.1%.Back flow reaction finishes, and dries under 80 ℃ again, grinds broken back and calcines 4h down at 450 ℃, obtains the SCR denitrating catalyst.
Detecting institute's controlling catalyst denitration efficiency through laboratory catalytic activity simulated experiment is 97.3%.
Embodiment 2
V 2O 5-WO 3@TiO 2-SBA-15 Preparation of catalysts:
1) be scattered in the absolute ethyl alcohol Powdered SBA-15 is ultrasonic, add butyl titanate and glacial acetic acid again, strong agitation 1h under the room temperature dropwise adds deionized water afterwards, continues stirring reaction 2.5h, makes the abundant hydrolysis of butyl titanate.In the reaction system, the mass percent of SBA-15 is 8.5%, butyl titanate mass percent be 4.2%, the mass percent of absolute ethyl alcohol is 66.1%, glacial acetic acid mass percent be 3.6%, the mass percent of deionized water is 17.6%.Reaction finishes, and product is used deionized water and absolute ethyl alcohol eccentric cleaning successively, and is dry under 70 ℃, calcines 4h down, obtains TiO for 400 ℃ 2-SBA-15 complex carrier.
2) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium paratungstate under 50 ℃ of conditions ultrasonic dissolution in oxalic acid solution.The TiO that step 1) is prepared 2-SBA-15 complex carrier powder joins in the above-mentioned oxalic acid solution, 70 ℃ of backflow 6h under stirring condition.In the reaction system, the mass percent of oxalic acid is 1.1%, and the mass percent of deionized water is 90.2%, and the mass percent of ammonium paratungstate is 0.5%, and the mass percent of complex carrier is 8.2%.Back flow reaction finishes, and dries under 80 ℃, grinds broken back and calcines 4h down at 450 ℃, obtains WO 3@TiO 2The powder of-SBA-15.
3) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium metavanadate under 40 ℃ of conditions ultrasonic dissolution in oxalic acid solution, then with step 2) WO that makes 3@TiO 2-SBA-15 powder joins in the oxalic acid solution, 70 ℃ of backflow 6h under stirring condition.Wherein, the mass percent of oxalic acid is 2.5%, and the mass percent of deionized water is 88.1%, WO 3@TiO 2The mass percent of-SBA-15 is 8.6%, and the mass percent of ammonium metavanadate is 0.8%.Back flow reaction finishes, and dries under 80 ℃ again, grinds broken back and calcines 4h down at 450 ℃, obtains the SCR denitrating catalyst.
Detecting institute's controlling catalyst denitration efficiency through laboratory catalytic activity simulated experiment is 95.8%.
Embodiment 2 and embodiment 1 different are mesoporous SiO 2That select is SBA-15, rather than MCM-41
Embodiment 3
Powdered SCR catalyst CeO 2-WO 3-TiO 2The preparation of/SBA-15:
1) be scattered in the absolute ethyl alcohol Powdered SBA-15 is ultrasonic, add butyl titanate and glacial acetic acid again, strong agitation 1.5h under the room temperature dropwise adds deionized water afterwards, continues stirring reaction 3.5h, makes the abundant hydrolysis of butyl titanate.In the reaction system, the mass percent of SBA-15 is 7.9%, butyl titanate mass percent be 3.1%, the mass percent of absolute ethyl alcohol is 69.9%, glacial acetic acid mass percent be 3.8%, the mass percent of deionized water is 17.0%.Reaction finishes, and product is used deionized water and absolute ethyl alcohol eccentric cleaning successively, and is dry under 90 ℃, calcines 3h down, obtains TiO for 460 ℃ 2-SBA-15 complex carrier.
2) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium paratungstate under 50 ℃ of conditions ultrasonic dissolution in oxalic acid solution; The TiO that step 1) is prepared 2-SBA-15 complex carrier powder joins in the above-mentioned oxalic acid solution, 70 ℃ of backflow 6h under stirring condition; In the reaction system, the mass percent of oxalic acid is 1.2%, and the mass percent of deionized water is 89.8%, and the mass percent of ammonium paratungstate ammonium is 0.3%, and the mass percent of complex carrier is 8.7%.Back flow reaction finishes, and dries under 80 ℃, grinds broken back and calcines 4h down at 450 ℃, obtains WO 3@TiO 2The powder of-SBA-15;
3) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with cerous nitrate under 40 ℃ of conditions ultrasonic dissolution in oxalic acid solution, then with step 2) WO that makes 3@TiO 2-SBA-15 powder joins in the oxalic acid solution, the following 70 ℃ of backflow 6h of stirring condition.Wherein, the mass percent of oxalic acid is 2.6%, and the mass percent of deionized water is 86.6%, WO 3@TiO 2The mass percent of-SBA-15 is 8.6%, and the mass percent of cerous nitrate is 2.2%.Back flow reaction finishes, and dries under 80 ℃ again, grinds broken back and calcines 4h down at 450 ℃, obtains the SCR denitrating catalyst.
Detecting institute's controlling catalyst denitration efficiency through laboratory catalytic activity simulated experiment is 94.4%.
Embodiment 3 is V with the different of embodiment 2 2O 5Replaced to CeO 2
Embodiment 4
CuO@TiO 2-SBA-15 Preparation of catalysts:
1) be scattered in the absolute ethyl alcohol Powdered SBA-15 is ultrasonic, add butyl titanate and glacial acetic acid again, strong agitation 2h under the room temperature dropwise adds deionized water afterwards, continues stirring reaction 4h, makes the abundant hydrolysis of butyl titanate.In the reaction system, the mass percent of SBA-15 is 8.8%, butyl titanate mass percent be 4.1%, the mass percent of absolute ethyl alcohol is 64.7%, glacial acetic acid mass percent be 4.2%, the mass percent of deionized water is 18.2%.Reaction finishes, and product is used deionized water and absolute ethyl alcohol eccentric cleaning successively, and is dry under 80 ℃, calcines 6h down, obtains TiO for 450 ℃ 2-SBA-15 complex carrier.
2) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution is followed the TiO that step 1) is made with copper nitrate ultrasonic dissolution under 40 ℃ of conditions again in oxalic acid solution 2-SBA-15 powder joins in the oxalic acid solution, the following 70 ℃ of backflow 6h of stirring condition.Wherein, the mass percent of oxalic acid is 2.6%, and the mass percent of deionized water is 86.2%, TiO 2The mass percent of-SBA-15 is 8.6%, and the mass percent of copper nitrate is 2.6%.Back flow reaction finishes, and dries under 80 ℃ again, grinds broken back and calcines 4h down at 450 ℃, obtains the SCR denitrating catalyst.
Detecting institute's controlling catalyst denitration efficiency through laboratory catalytic activity simulated experiment is 92.7%.
Embodiment 4 compares with former examples, and difference is co-catalyst of no use, and that the major catalyst use is CuO.
Embodiment 5
V 2O 5-MoO 3-WO 3@TiO 2-SBA-15 Preparation of catalysts:
1) be scattered in the absolute ethyl alcohol Powdered SBA-15 is ultrasonic, add butyl titanate and glacial acetic acid again, strong agitation 1h under the room temperature dropwise adds deionized water afterwards, continues stirring reaction 3h, makes the abundant hydrolysis of butyl titanate.In the reaction system, the mass percent of SBA-15 is 8.5%, butyl titanate mass percent be 4.2%, the mass percent of absolute ethyl alcohol is 68.8%, glacial acetic acid mass percent be 3.6%, the mass percent of deionized water is 14.9%.Reaction finishes, and product is used deionized water and absolute ethyl alcohol eccentric cleaning successively, and is dry under 85 ℃, calcines 3.5h down, obtains TiO for 480 ℃ 2-SBA-15 complex carrier.
2) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium paratungstate and ammonium molybdate under 50 ℃ of conditions ultrasonic dissolution in oxalic acid solution.The TiO that step 1) is prepared 2-SBA-15 complex carrier powder joins in the above-mentioned oxalic acid solution, 70 ℃ of backflow 6h under stirring condition.In the reaction system, the mass percent of oxalic acid is 0.6%, and the mass percent of deionized water is 59.9%, and the mass percent of ammonium paratungstate is 0.8%, and the mass percent of ammonium molybdate is 0.6%, and the mass percent of complex carrier is 38.1%.Back flow reaction finishes, and dries under 80 ℃, grinds broken back and calcines 4h down at 450 ℃, obtains MoO 3-WO 3@TiO 2The powder of-SBA-15.
3) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium metavanadate under 40 ℃ of conditions ultrasonic dissolution in oxalic acid solution, then with step 2) MoO that makes 3-WO 3@TiO 2-SBA-15 powder joins in the oxalic acid solution, the following 70 ℃ of backflow 6h of stirring condition.Wherein, the mass percent of oxalic acid is 2.3%, and the mass percent of deionized water is 89.1%, MoO 3-WO 3@TiO 2The mass percent of-SBA-15 is 8.4%, and the mass percent of ammonium metavanadate is 0.2%.Back flow reaction finishes, and dries under 80 ℃ again, grinds broken back and calcines 4h down at 450 ℃, obtains the SCR denitrating catalyst.
Detecting institute's controlling catalyst denitration efficiency through laboratory catalytic activity simulated experiment is 96.1%.
Embodiment 5 compares with former examples, and difference is to have selected two kinds of co-catalysts to use simultaneously.
Embodiment 6
V 2O 5-Cr 2O 3@TiO 2-SBA-15 Preparation of catalysts:
1) be scattered in the absolute ethyl alcohol Powdered SBA-15 is ultrasonic, add butyl titanate and glacial acetic acid again, strong agitation 1h under the room temperature dropwise adds deionized water afterwards, continues stirring reaction 3h, makes the abundant hydrolysis of butyl titanate.In the reaction system, the mass percent of SBA-15 is 8.9%, butyl titanate mass percent be 4.3%, the mass percent of absolute ethyl alcohol is 68.3%, glacial acetic acid mass percent be 3.7%, the mass percent of deionized water is 14.8%.Reaction finishes, and product is used deionized water and absolute ethyl alcohol eccentric cleaning successively, and is dry under 80 ℃, calcines 4h down, obtains TiO for 420 ℃ 2-SBA-15 complex carrier.
2) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium chromate under 50 ℃ of conditions ultrasonic dissolution in oxalic acid solution.The TiO that step 1) is prepared 2-SBA-15 complex carrier powder joins in the above-mentioned oxalic acid solution, 70 ℃ of backflow 6h under stirring condition.In the reaction system, the mass percent of oxalic acid is 0.6%, and the mass percent of deionized water is 59.4%, and the mass percent of ammonium chromate is 0.8%, and the mass percent of complex carrier is 39.2%.Back flow reaction finishes, and dries under 80 ℃, grinds broken back and calcines 4h down at 450 ℃, obtains Cr 2O 3@TiO 2The powder of-SBA-15.
3) oxalic acid is dissolved in the deionized water, the preparation oxalic acid solution, again with ammonium metavanadate under 40 ℃ of conditions ultrasonic dissolution in oxalic acid solution, then with step 2) Cr that makes 2O 3@TiO 2-SBA-15 powder joins in the oxalic acid solution, the following 70 ℃ of backflow 6h of stirring condition.Wherein, the mass percent of oxalic acid is 2.1%, and the mass percent of deionized water is 89.8%, Cr 2O 3@TiO 2The mass percent of-SBA-15 is 7.9%, and the mass percent of ammonium metavanadate is 0.2%.Back flow reaction finishes, and dries under 80 ℃ again, grinds broken back and calcines 4h down at 450 ℃, obtains the SCR denitrating catalyst.
Detecting institute's controlling catalyst denitration efficiency through laboratory catalytic activity simulated experiment is 92.8%.
Embodiment 6 is to have selected Cr with the difference of previous examples 2O 3As co-catalyst.

Claims (6)

1. NEW TYPE OF COMPOSITE carrier S CR catalyst for denitrating flue gas is characterized in that this catalyst comprises following composition by mass percentage:
Complex carrier 85～99.9%
Major catalyst 0.1～15%
2. according to claims 1 described NEW TYPE OF COMPOSITE carrier S CR catalyst for denitrating flue gas, it is characterized in that described primary catalyst component is V 2O 5, CeO 2, CuO and/or MnOx; Major catalyst obtains by adding the major catalyst precursor; Described major catalyst precursor is ammonium metavanadate, cerous nitrate, cerium chloride, copper nitrate, copper chloride, manganese acetate and/or manganese nitrate.
3. according to claims 1 described NEW TYPE OF COMPOSITE carrier S CR catalyst for denitrating flue gas, it is characterized in that the described composition also amount of comprising percentage is 0～5% co-catalyst.
4. according to claims 3 described NEW TYPE OF COMPOSITE carrier S CR catalyst for denitrating flue gas, it is characterized in that the composition of described co-catalyst is MoO 3, WO 3And/or Cr 2O 3Co-catalyst obtains by adding the co-catalyst precursor; Described co-catalyst precursor is ammonium molybdate, ammonium tungstate and/or ammonium chromate.
5. according to claim 1 or 3 described NEW TYPE OF COMPOSITE carrier S CR catalyst for denitrating flue gas, it is characterized in that described complex carrier is the mesoporous SiO of 80～95wt% by mass percent 2With mass percent be the TiO of 5～20wt% 2Form.
6. according to claims 1 or 3 described NEW TYPE OF COMPOSITE carrier S CR catalyst for denitrating flue gas, it is characterized in that described mesoporous SiO 2The MCM-41 or the SBA-15 that comprise hexagonal structure.
CN 201010260914 2010-08-23 2010-08-23 Novel composite carrier SCR flue gas denitration catalyst Pending CN101954290A (en)

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