CN106166487A - A kind of quaternary composite oxides low-temperature SCR catalyst and preparation method thereof - Google Patents

A kind of quaternary composite oxides low-temperature SCR catalyst and preparation method thereof Download PDF

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CN106166487A
CN106166487A CN201610518223.6A CN201610518223A CN106166487A CN 106166487 A CN106166487 A CN 106166487A CN 201610518223 A CN201610518223 A CN 201610518223A CN 106166487 A CN106166487 A CN 106166487A
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catalyst
manganese
salt
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mol ratio
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胡宇峰
薛建明
王小明
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State Power Environmental Protection Research Institute
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • 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
    • B01J23/32—Manganese, technetium or rhenium
    • B01J23/34—Manganese
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • B01D53/90—Injecting reactants
    • 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
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/40—Mixed oxides
    • B01D2255/407—Zr-Ce mixed oxides
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
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  • Oil, Petroleum & Natural Gas (AREA)
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  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The invention discloses a kind of quaternary composite oxides low-temperature SCR catalyst and preparation method thereof, this catalyst uses TiO2‑ZrO2For carrier, Supported Manganese cerium oxide on it；In catalyst, the mol ratio of each element of Ti, Zr, Mn, Ce is 1:1:(0.005 1): (0.005 1).The catalyst that the present invention prepares, reduces the operation temperature of SCR so that in SCR technique, with NH3During for reducing agent, it is possible to just can obtain higher NO clearance when 80 180 DEG C, and when system contains SO2And H2During O, remain to possess higher catalytic efficiency, and SO2Murder by poisoning to it has restorability.

Description

A kind of quaternary composite oxides low-temperature SCR catalyst and preparation method thereof
Technical field
The present invention relates to a kind of low-temperature SCR catalyst for flue gas removing NOx, particularly there is anti-sulfur dioxide and water Low-temperature SCR catalyst based on Mn-Ce-Ti-Zr system of performance and preparation method thereof.
Background technology
Utilize ammonia NH3As reducing agent, SCR (SCR) removing NOx technology is the most most widely used Gas denitrifying technology.NH3, NO and O2Redox reaction is occurred to generate N under catalyst action2And H2O.The catalysis of its application Agent is mainly V2O5/TiO2Series, this catalyst temperature window is 300-450 DEG C.In order to reduce SCR reaction temperature, research and Exploitation low temperature (less than 180 DEG C) SCR reaction process and the most active SCR catalyst have important meaning Justice.
MnOx is carried on TiO2On studied the most widely as low-temperature SCR catalyst, usually used as low-temperature SCR Major catalyst；CeO2As a kind of cheap, nontoxic material, it is possible to as preferably storage oxygen agent, the oxygen strengthening catalyst follows Ring, is commonly used for the promoter of low-temperature SCR.
TiO2To SO2There are preferable resistance, ZrO2It is that uniquely there is acid, alkalescence and oxidation, the compound of reproducibility simultaneously, It is widely applied as catalyst, but and SiO2And Al2O3Compare etc. common carrier, TiO2And ZrO2Specific surface area Less.
ZrO2With TiO2When being combined as carrier, it is possible to replace the position of Ti in original lattice, form ZrTiO4.With single Oxide compare, composite oxides have bigger specific surface area, more preferable heat stability and mechanical strength and higher Surface acidic-basic property, SO2When absorption, these some positions can attract SO2, the active sites on effective guard catalyst surface, due to adding of Zr Enter to change the bond energy of crystal, SO2At ZrTiO4Surface can be only formed more weak and reversible sulfate；In addition ZrO2Permissible Interact with active substance, form metal solid solution, so that SO2It is difficult to react generation metal sulfate with active substance And metal sulphite.
General MnOx-CeO2/TiO2-ZrO2It is divided into carrier to make and dipping two steps, uses and active component is supported on The TiO of preparation2-ZrO2On prepare catalyst, it is thus achieved that certain denitration activity, but this catalyst activity component is on carrier Dispersion inequality, easily sintering and peeling, catalyst is at anti-SO2Indifferent with water intoxication, it is difficult to reach wanting of popularization and application Ask.Therefore, improve Mn, Ce dispersing characteristic on carrier and crystallization characteristic will be to catalyst activity and anti-SO2And water intoxication Ability produce far-reaching influence, improve the catalyst activity component such as Mn, Ce dispersion on carrier and intensity be research One emphasis.
Summary of the invention
The invention aims to solve defect present in prior art, it is provided that one can be effective to cryogenic conditions Under, the catalyst that reacts of the SCR (SCR) of nitrogen oxides.
In order to achieve the above object, the invention provides a kind of quaternary composite oxides low-temperature SCR catalyst, this catalyst Use TiO2-ZrO2For carrier, Supported Manganese cerium oxide on it；In catalyst, the mol ratio of each element of Ti, Zr, Mn, Ce is 1:1: (0.005-1): (0.005-1).Preferred molar ratio is 1:1:(0.1-0.7): (0.05-0.4), optimum mole ratio is 1:1:0.1: 0.05。
Above-mentioned catalyst uses following methods step to prepare:
(1) take inorganic titanium salt by mol ratio 1:1 of Ti, Zr and inorganic zirconium salts prepare mixed aqueous solution, be slowly added to alkaline matter, It is not further added by precipitation, filtration washing, obtains white solid；
(2) adding nitric acid in white solid, stirring is to being completely dissolved；
(3) it is 1:1:(0.005-1 according to the mol ratio of element ti, Zr, Mn, Ce): (0.005-1) prepares to step (2) Solution in add soluble manganese salt and solubility cerium salt, be uniformly mixing to obtain co-precipitation mother solution；
(4) in the co-precipitation mother solution that step (3) obtains, it is slowly added to alkaline matter while stirring and is co-precipitated, until heavy Form sediment and be not further added by, filtration washing；
(5) solid that step (4) obtains is dried at 80-150 DEG C, at 400-600 DEG C, then calcine 2-6h, obtain described Catalyst.
Wherein, inorganic titanium salt is selected from titanium sulfate, titanyl sulfate, titanium tetrachloride or titanous chloride., preferably sulfuric acid titanium；Inorganic zirconium Salt is selected from Zirconium tetrachloride., basic zirconium chloride or zirconium nitrate, preferably zirconium nitrate；Soluble manganese salt is selected from manganese sulfate, manganese nitrate, manganese chloride Or manganese acetate, preferably manganese nitrate；Solubility cerium salt is selected from cerous sulfate or cerous nitrate, preferably cerous nitrate.
Alkaline matter in step (1) and step (4) selected from ammonia, ammonium carbonate, ammonium hydrogen carbonate, sodium hydroxide, sodium carbonate, One or more mixing in sodium bicarbonate；The addition of alkaline matter is to react completely or little over measuring；It is preferably added to ammonia Water, the concentration of ammonia is 10%-30%, and in ammonia, the mol ratio of N Yu Ti is 8:1.
In step (2), the addition of nitric acid is to react completely or little over measuring；The concentration of nitric acid is 5-20%, preferably 20%, HNO in nitric acid3It is 8:1 with the mol ratio of Ti.
The present invention has the advantage that compared to existing technology
1, the present invention uses quaternary coprecipitation technology to improve manganese, cerium both elements and the composite attribute of titanium Zirconium oxide, improves The dispersion of active component and bond strength.Co-precipitation mother solution in, containing Titanium ion, metal zirconium ion, manganese from Son and cerium ion, after adding alkaline precipitating agent, i.e. can get Ce-Mn-Ti-Zr-OxComposite oxides.
2, Mn is as the catalytic active component in catalyst, and it is primarily present form is unformed shape, using the teaching of the invention it is possible to provide catalysis The active sites of reaction, to reactant NO and NH3Adsorb, and react on neighbouring acid sites.MnOx is as catalysis During agent, reaction can be promoted to start to occur at about 100 DEG C, and obtain good effect when 120-200 DEG C.And owing to Mn deposits At the most different oxide types, such as MnO, MnO2、Mn2O3And Mn3O4Deng, various oxides can mutually convert, Qi Zhonghan The a large amount of active oxygens having so that MnOx completes the circulation of catalysis in catalytic process.
3, Ce is promoter, and Main Function is to promote that NO is to NO2Changing, improve SCR reactivity, Ce can also increase in addition Add the electron transfer in catalytic reaction, and as preferably storage oxygen agent, strengthen the Oxygen cycle of catalyst, it is ensured that catalytic reaction Persistently carry out.
4, the present invention uses Ti (NO in co-precipitation simultaneously3)4With Zr (NO3)4As presoma, it is to avoid sulfate radical, The impact of catalyst (is prevented a part of sulfate ion, chloride ion etc. from can precipitated wrap, by mistake by the impurity such as chloride ion Filter washing can only wash away the impurity of particle surface, and cannot remove the impurity within particle-removing, and the impurity of catalytic inner can affect The transformation of crystal formation, reduces the specific surface area of catalyst, reduces the activity of catalyst), and utilize nitric acid favourable to the acidifying of carrier In improving catalyst to SO2And H2The resistance of O.
5, the catalyst that the present invention prepares is in the range of 80-200 DEG C, and the highest catalytic efficiency can be close 100%.Catalysis activity is significantly better than existing low-temperature SCR catalyst.At SO2And H2O affects aspect, has SO in systems2With H2In the presence of O, the removal efficiency of NO is slightly reduced, but works as SO2And H2After O removes, the clearance of NO is returned to substantially original water Flat.
6, the catalyst that the present invention prepares, reduces the operation temperature of SCR so that in SCR technique, with NH3For During reducing agent, it is possible to just can obtain higher NO clearance when 80-120 DEG C, and when system contains SO2And H2During O, still Higher catalytic efficiency, and SO can be possessed2Murder by poisoning to it has restorability.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1
Titanium sulfate and Zirconium tetrachloride. are dissolved in water (ice-water bath), are added dropwise over the ammonia of 30%, obtain white precipitate, to be precipitated complete Quan Hou, filters, is washed with deionized precipitate, remove chloride ion and sulfate ion.Nitric acid with 20% is complete by white precipitate CL, after adding manganese nitrate, cerous nitrate, in the ammonia of 30% be gradually dropped in whipping process by solution, obtains in this solution Must precipitate, filter, be washed with deionized precipitate, be dried at 120 DEG C, at 550 DEG C, then calcine 4.5h, it is thus achieved that Mn- Ce-Ti-Zr-OxCatalyst.Wherein Mn:Ce:Ti:Zr=0.3:0.05:1:1.
Catalyst filling carries out on fixed bed reactors catalyst activity experiment, and application processes NO:NH3=1, O2Concentration 6%, GHSV (gas space velocity per hour)=10000h-1SCR method denitrating flue gas, during reaction temperature 140 DEG C, catalytic efficiency 85.4%, Add the SO of 150ppm2With 8% H2After O, at 140 DEG C, catalytic efficiency is still more than 80.2%.
Embodiment 2
Titanium sulfate and zirconium nitrate are dissolved in water, are added dropwise over the ammonia of 30%, obtain white precipitate, to be precipitated completely after, filter, Washing, removes chloride ion and sulfate ion.With the nitric acid of 20%, white precipitate is completely dissolved, in this solution, adds nitric acid After manganese, cerous nitrate, in the ammonia of 30% that solution is gradually dropped in whipping process, it is thus achieved that precipitation, filter, wash, at 120 DEG C Lower dry, at 550 DEG C, then calcine 4.5h, it is thus achieved that Mn-Ce-Ti-Zr-OxCatalyst.Wherein Mn:Ce:Ti:Zr=0.1: 0.05:1:1.
Application processes NO:NH3=1, O2Concentration 6%, GHSV (gas space velocity per hour)=10000h-1SCR method flue gas take off Nitre, during reaction temperature 140 DEG C, catalytic efficiency 89.1%, add the SO of 150ppm2With 8% H2After O, at 140 DEG C, catalytic efficiency is 85.4%。
Embodiment 3
Titanyl sulfate and Zirconium tetrachloride. are dissolved in water (ice-water bath), are added dropwise over the ammonia of 30%, obtain white precipitate, to be precipitated After Wan Quan, filter, wash, remove chloride ion and sulfate ion.With the nitric acid of 20%, white precipitate is completely dissolved, molten to this After liquid adds manganese nitrate, cerous nitrate, in the ammonia of 30% that solution is gradually dropped in whipping process, it is thus achieved that precipitation, filter, Washing, is dried at 120 DEG C, then calcines 4.5h at 550 DEG C, it is thus achieved that Mn-Ce-Ti-Zr-OxCatalyst.Wherein Mn:Ce: Ti:Zr=0.6:0.4:1:1.
Application processes NO:NH3=1, O2Concentration 6%, GHSV=10000h-1SCR method denitrating flue gas, reaction temperature 140 DEG C Time, catalytic efficiency 84.2%, add the SO of 150ppm2With 8% H2After O, at 140 DEG C, catalytic efficiency is 80.1%.
Embodiment 4
Titanium tetrachloride and Zirconium tetrachloride. are dissolved in water (ice-water bath), are added dropwise over the ammonia of 10%, obtain white precipitate, to be precipitated After Wan Quan, filter, wash, remove removing chloride.With the nitric acid of 20%, white precipitate is completely dissolved, in this solution, adds acetic acid Manganese, cerous nitrate, in the ammonia of 30% be gradually dropped in whipping process by solution, it is thus achieved that precipitation, filters, washs, at 120 DEG C It is dried, at 500 DEG C, then calcines 4.5h, it is thus achieved that Mn-Ce-TiOxCatalyst.Wherein Mn:Ce:Ti:Zr=0.7:0.3:1:1.
Application processes NO:NH3=1, O2Concentration 6%, GHSV=10000h-1SCR method denitrating flue gas, reaction temperature 140 DEG C Time, catalytic efficiency 89.2%, add the SO of 150ppm2With 8% H2After O, at 140 DEG C, catalytic efficiency is 83.4%.
Embodiment 5
Titanous chloride. and basic zirconium chloride are dissolved in water (ice-water bath), are added dropwise over the ammonia of 10%, obtain white precipitate, to be precipitated After Wan Quan, filter, wash, remove removing chloride.With the nitric acid of 20%, white precipitate is completely dissolved, in this solution, adds nitric acid Manganese, cerous nitrate, in the ammonia of 30% be gradually dropped in whipping process by solution, it is thus achieved that precipitation, filters, washs, at 120 DEG C It is dried, at 500 DEG C, then calcines 4h, it is thus achieved that Mn-Ce-TiOxCatalyst.Wherein Mn:Ce:Ti:Zr=0.7:0.3:1:1.
Application processes NO:NH3=1, O2Concentration 6%, GHSV=10000h-1SCR method denitrating flue gas, reaction temperature 140 DEG C Time, catalytic efficiency 92.3%, add the SO of 150ppm2With 8% H2After O, at 140 DEG C, catalytic efficiency is 82.5%.

Claims (8)

1. a quaternary composite oxides low-temperature SCR catalyst, it is characterised in that: described catalyst uses TiO2-ZrO2For carrying Body, Supported Manganese cerium oxide on it；In described catalyst, the mol ratio of each element of Ti, Zr, Mn, Ce is 1:1:(0.005-1): (0.005-1).
Catalyst the most according to claim 1, it is characterised in that: the mol ratio of described Ti, Zr, Mn, Ce is 1:1:(0.1- 0.7): (0.05-0.4).
Catalyst the most according to claim 1, it is characterised in that: the mol ratio of described Ti, Zr, Mn, Ce is 1:1:0.1: 0.05。
4. the preparation method of the arbitrary described catalyst of claims 1 to 3, it is characterised in that: described preparation method includes following step Rapid:
(1) take inorganic titanium salt by mol ratio 1:1 of Ti, Zr and inorganic zirconium salts prepare mixed aqueous solution, be slowly added to alkaline matter, It is not further added by precipitation, filtration washing, obtains white solid；
(2) adding nitric acid in white solid, stirring is to being completely dissolved；
(3) it is 1:1:(0.005-1 according to the mol ratio of element ti, Zr, Mn, Ce): (0.005-1) prepares to step (2) Solution in add soluble manganese salt and solubility cerium salt, be uniformly mixing to obtain co-precipitation mother solution；
(4) in the co-precipitation mother solution that step (3) obtains, it is slowly added to alkaline matter while stirring and is co-precipitated, until heavy Form sediment and be not further added by, filtration washing；
(5) solid that step (4) obtains is dried at 80-150 DEG C, at 400-600 DEG C, then calcine 2-6h, obtain described Catalyst.
Preparation method the most according to claim 4, it is characterised in that: described inorganic titanium salt selected from titanium sulfate, titanyl sulfate, Titanium tetrachloride or titanous chloride.；Described inorganic zirconium salts is selected from Zirconium tetrachloride., basic zirconium chloride or zirconium nitrate；Described soluble manganese salt selects From manganese sulfate, manganese nitrate, manganese chloride or manganese acetate；Described solubility cerium salt is selected from cerous sulfate or cerous nitrate.
Preparation method the most according to claim 5, it is characterised in that: described inorganic titanium salt is titanium sulfate；Described inorganic zirconium Salt is zirconium nitrate；Described soluble manganese salt is manganese nitrate；Described solubility cerium salt is cerous nitrate.
Preparation method the most according to claim 4, it is characterised in that: described alkaline matter is selected from ammonia, ammonium carbonate, carbonic acid One or more mixing in hydrogen ammonium, sodium hydroxide, sodium carbonate, sodium bicarbonate；The concentration of described ammonia is 10%-30%, ammonia The mol ratio of middle N Yu Ti is 8:1.
Preparation method the most according to claim 4, it is characterised in that: the concentration of described nitric acid is 5-20%；HNO in nitric acid3 It is 8:1 with the mol ratio of Ti.
CN201610518223.6A 2016-07-05 2016-07-05 A kind of quaternary composite oxides low-temperature SCR catalyst and preparation method thereof Pending CN106166487A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107694576A (en) * 2017-09-30 2018-02-16 中晶蓝实业有限公司 Dry desulfurization denitrfying agent and its production method and application
CN108404922A (en) * 2018-02-07 2018-08-17 山东大学 One kind being used for low temperature NOxThe quick regenerated catalyst of alternating sorbent-and preparation method
CN109603815A (en) * 2018-12-10 2019-04-12 北京科技大学 A kind of highly selective manganese-based low-temperature denitration catalyst and preparation method thereof
CN112742371A (en) * 2020-12-31 2021-05-04 华中科技大学 Efficient catalytic CO2Preparation method of Zr-In spherical oxide catalyst for hydrogenation reaction
CN113952947A (en) * 2021-11-08 2022-01-21 贵州大学 Hollow core-shell catalyst, and preparation method and application thereof
CN115970678A (en) * 2022-12-22 2023-04-18 南昌航空大学 MCeTiOx catalyst, preparation method and application thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102008956A (en) * 2010-12-27 2011-04-13 国电科学技术研究院 Preparation method of low-temperature selective catalytic reduction (SCR) catalyst by removing NOx from flue gas
CN102114424A (en) * 2010-12-29 2011-07-06 国电科学技术研究院 Low-temperature smoke denitration SCR (silicon controlled rectifier) catalyst and preparation method
CN105498755A (en) * 2016-01-14 2016-04-20 东南大学 SCR denitration catalyst and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102008956A (en) * 2010-12-27 2011-04-13 国电科学技术研究院 Preparation method of low-temperature selective catalytic reduction (SCR) catalyst by removing NOx from flue gas
CN102114424A (en) * 2010-12-29 2011-07-06 国电科学技术研究院 Low-temperature smoke denitration SCR (silicon controlled rectifier) catalyst and preparation method
CN105498755A (en) * 2016-01-14 2016-04-20 东南大学 SCR denitration catalyst and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107694576A (en) * 2017-09-30 2018-02-16 中晶蓝实业有限公司 Dry desulfurization denitrfying agent and its production method and application
CN108404922A (en) * 2018-02-07 2018-08-17 山东大学 One kind being used for low temperature NOxThe quick regenerated catalyst of alternating sorbent-and preparation method
CN109603815A (en) * 2018-12-10 2019-04-12 北京科技大学 A kind of highly selective manganese-based low-temperature denitration catalyst and preparation method thereof
CN112742371A (en) * 2020-12-31 2021-05-04 华中科技大学 Efficient catalytic CO2Preparation method of Zr-In spherical oxide catalyst for hydrogenation reaction
CN113952947A (en) * 2021-11-08 2022-01-21 贵州大学 Hollow core-shell catalyst, and preparation method and application thereof
CN115970678A (en) * 2022-12-22 2023-04-18 南昌航空大学 MCeTiOx catalyst, preparation method and application thereof
CN115970678B (en) * 2022-12-22 2023-09-01 南昌航空大学 MCeTiOx catalyst and preparation method and application thereof

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Application publication date: 20161130