CN108993586A - A kind of preparation method for the Beta type molecular sieve that anti-propylene poisons - Google Patents
A kind of preparation method for the Beta type molecular sieve that anti-propylene poisons Download PDFInfo
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/78—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
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Abstract
The invention discloses a kind of preparation methods of Beta type molecular sieve that anti-propylene poisons, to load the channel diameter 6.3~6.8 of FeBeta type molecular sieve be substrate；Oxides additive is added into molecular screen base bottom, stirs evenly, grinds 40~90min；Sample after mechanical mixture is ground is roasted 4 hours in 500 DEG C of air with the heating rate of 2~5 DEG C/min；Wherein, the oxides additive is selected from MnOx, CeO2Or MnOx/CeO2, the MnOx/CeO2In, MnOxLoad capacity be 50%.Catalyst obtained is applied to the NH containing propylene in atmosphere3In-SCR reaction, have the characteristics that high activity, high anti-sulfur poisonous performance, makes up the deficiency of the anti-propylene poisoning performance difference of existing catalyst or anti-sulfur poisonous performance difference.
Description
Technical field
The invention belongs to nitrogen oxides control technology fields in environmental protection, and in particular to a kind of to utilize molecular sieve and oxidation
The synthesis of composite catalyst based on object and its performance study.
Background technique
NOxEmission source includes that stationary source (produces, the burning of the fossil fuels such as coal and petroleum and production and application nitre in life
The exhaust of the factory of acid) and moving source (motor-vehicle tail-gas).In recent years, people are higher and higher to the cry of environmental protection, beauty, Japan and Korea S.
New discharge standard is being worked out and executed in recent years in succession with industrially developed country such as Europe, it is increasingly tight to the discharge limitation of NO
Lattice.Therefore, how controlling nitrogen oxides, oneself becomes a research hotspot both domestic and external.NH3Selective Catalytic Reduction of NOx(NH3-
It SCR) is current most effective purification NOxMethod, the technology utilize reducing agent NH3On a catalyst by NOxIt is reduced to harmless N2
And H2O.The core of SCR technology is the catalyst of high activity and stability, and noble metal, metal oxide etc. is all proved to be effective
SCR catalyst, in these catalyst, with TiO2There is activity and water resistant resistance to SO_2 well for the catalytic component based on vanadium of carrier
Energy.With V2O5Industrialization production is had begun in foreign countries in eighties of last century the seventies and eighties for the catalytic component based on vanadium of active component, by
There is good activity and water resistant sulfur resistance in such catalyst, obtained widely answering in stationary source coal-fired flue gas denitration
With.In the NO of exhaust gas from diesel vehiclexPurification aspect, correlative study has also been carried out in Europe a few years ago, and is applied in heavy-duty diesel vehicle
NOxTail gas clean-up (Appl.Catal.B 18 (1998) 1 36.).But the catalyst still has not in motor-vehicle tail-gas control
Foot, first is that active component V2O5It is toxic, it causes damages after vaporization at high temperature to atmospheric environment, followed by a catalyst in tail gas
SO2Easily it is oxidized to SO3, further give off sulfate particulate.More seriously in the diesel oil that particulate matter trap is housed
Che Shang, when trap regeneration, temperature is often more than 700 DEG C, to make catalyst carrier TiO2It undergoes phase transition, leads to catalyst
Activity declines to a great extent.Molecular sieve catalyst is to selective reduction NOxWith high catalytic activity, and active temperature windows compare
Width restores NO in selective catalysisxIt is concerned in technology.Molecular sieve be used as catalyst be based on its special microcellular structure,
Type, silica alumina ratio, the ionic species of exchange, reaction condition, exchange degree etc. can all influence its activity.For SCR catalyst carrier
Molecular sieve mainly include ZSM series, Y type, mordenite (MOR), BEA type etc., and be used for the metallic element master of ion exchange
It to include Fe, Cu, Mn, Ce, Co and Ni etc..Research in recent years about Fe/ZSM-5 development is more, and in NH3Restore NOxIt is anti-
Preferable effect (J.Catal., 207 (2002): 224 231 have been obtained in answering；Appl.Catal.B, 60 (2005): 13
22.).For NO in motor-vehicle tail-gasxPurification, that industry is relatively more good at present is the H-ZSM-5 using Cu, Fe as active component
And Beta is the catalyst of carrier.But it finds in practical applications, inevitable hydrocarbon emission, will cause in tail gas
Different degrees of catalyst carbon deposition and inactivate.It is domestic for NO in molecular sieve catalyst purifying motor tail gas at presentxTechnology is ground
Study carefully it is at the early-stage, the thermal stability of catalyst, HC compound to catalyst poisoning problem be such catalyst in practical applications
The critical issue for needing to solve.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of Beta type molecular sieve that anti-propylene poisons.By catalysis obtained
Agent is applied to the NH containing propylene in atmosphere3In-SCR reaction, has the characteristics that high activity, high anti-sulfur poisonous performance, make up existing
The deficiency of the anti-propylene poisoning performance difference of catalyst or anti-sulfur poisonous performance difference.
The invention is realized by the following technical scheme:
A kind of preparation method for the Beta type molecular sieve that anti-propylene poisons is about to load the channel diameter of Fe
Beta type molecular sieve be substrate；Oxides additive is added into molecular screen base bottom, stirs evenly, grinds 40~90min；By
Sample after mechanical mixture grinding is roasted 4 hours in 500 DEG C of air with the heating rate of 2~5 DEG C/min；The oxide
Auxiliary agent is selected from MnOx, CeO2Or MnOx/CeO2.The MnOx/CeO2In, MnOxLoad capacity be 50wt%.
Further, in the above-mentioned technical solutions, when oxides additive is added, the matter at molecular screen base bottom and oxides additive
Amount is than being 0.5~3.5: 1.
Further, in the above-mentioned technical solutions, the grinding uses agate mortar.Two kinds of groups of precise are split
It in mortar, stirs evenly, then is fully ground 40~90min with agate pestle, until color sample is unified, particle is uniform.
The present invention provides above-mentioned catalyst in atmosphere containing the NH of propylene3Application in-SCR reaction.
Further, in the above-mentioned technical solutions, the preparation of Fe-Beta are as follows:
Carrier is used as using the Beta molecular sieve (Si/Al ≈ 9) of Template-free method synthesis, is passed through with ferrocene toluene solution
Volume impregnation method is prepared for a series of Fe-Beta catalyst.The ammonium nitrate that Na-Beta molecular sieve is placed in 0.5mol/L first is molten
In liquid, it is vigorously stirred 4h at 80 DEG C, then filters, wash, and in 120 DEG C of dry 8~12h, gained sample is used identical again
After the exchange of concentration ammonium nitrate solution, NH is obtained4- Beta molecular sieve；Then, NH is accurately measured4The toluene of-Beta molecular sieve is full
And wiring solution-forming in corresponding toluene is added in adsorbance, the amount of ferrocene needed for calculating, then slowly by ferrocene toluene solution
It is added drop-wise to NH4It in-Beta molecular sieve, stirs evenly, is stored at room temperature 50h or more；Finally gained sample is forged in still air
It burns, rises to 500 DEG C with the heating rate of 2~5 DEG C/min and 4h is kept to obtain Fe-Beta catalyst.
Further, in the above-mentioned technical solutions, the preparation of oxides additive are as follows:
CeO2It is purchased from Tianjin Hua Hong new material Co., Ltd.MnOxCarrier surface is loaded in the method for deposition sedimentation: first
Appropriate manganese nitrate solution is mixed with carrier respectively, then under agitation by Na2CO3Corresponding suspension is added dropwise in solution
Reach 8.5~9.0 to pH.After aging 1h is stirred at room temperature, is filtered, washed.Obtained solid powder is placed in baking oven and does for 110 DEG C
After dry 6h, further 400 DEG C of roasting 4h obtain MnO in Muffle furnacex/CeO2Catalyst, MnOxLoad capacity be 50%.MnOx
Catalyst is then that appropriate manganese nitrate solution is added in deionized water, then under agitation by Na2CO3Solution is added dropwise
Reach 8.5~9.0 to pH.After aging 1h is stirred at room temperature, is filtered, washed.Obtained solid powder is placed in baking oven and does for 110 DEG C
After dry 6h, further 400 DEG C of roasting 4h obtain MnO in Muffle furnacexCatalyst.
Invention beneficial effect
1, it using the method for mechanical lapping by molecular sieve catalyst and auxiliary combination, successfully prepares in NH3- SCR reaction
In with anti-propylene poisoning performance high activity composite catalyst, such as with MnOx/CeO2It is in mass ratio 1: 3 and Fe- for auxiliary agent
After Beta mixing, 150 DEG C high by 38% than simple Fe-Beta activity.
2, by modulation auxiliary agent type and ratio, different active effects can be obtained.Such as: utilizing MnOxAs auxiliary agent
When, it is easier to obtain excellent low temperature active, 90% or more conversion ratio can be reached in 200~350 DEG C of warm areas；With CeO2To help
When agent, then high temperature section activity more preferably, 90% or more conversion ratio can be obtained in 300~450 DEG C of warm areas；And utilize MnOx/
CeO2For the catalyst of auxiliary agent, then the warm window of broader reaction can be obtained, conversion ratio is above 90% within the scope of 200~400 DEG C.
3, by changing assistant types, the anti-sulfur poisonous performance of composite catalyst can be significantly improved.Such as: when auxiliary agent is
MnOxWhen, SO is passed through at 250 DEG C2After reaction 8 hours, activity is only capable of reaching 37%, but auxiliary agent is changed to MnOx/CeO2Afterwards, identical
After conditioned response 8 hours, activity remains to be maintained at 68%.
Detailed description of the invention
5 width of attached drawing of the present invention,
Fig. 1 be embodiment 1-3 preparation Fe-Beta and the sample of different auxiliary agent mechanical mixtures in atmosphere containing propylene
NH3The active comparison diagram of-SCR reaction；
The Fe-Beta and MnO that Fig. 2 is embodiment 3-5 and prepared by comparative example 1x/CeO2The sample of mechanical mixture in varing proportions
Product are in atmosphere containing the NH of propylene3The active comparison diagram of-SCR reaction；
Fig. 3 be embodiment 1-3 preparation Fe-Beta from the sample of different auxiliary agent mechanical mixtures in 250 DEG C of sulfur poisoning-resistants
The active comparison diagram of energy；
It is to improve anti-propylene poisoning performance that Fig. 4, which is in document [1], utilizes CeO2The activity comparison molecular sieve modified to HBEA
Figure；
It is to improve anti-propylene poisoning performance that Fig. 5, which is in document [2], and the activity after molecular sieve outer layer synthesis core shell structure is right
Than figure.
[1] Y.Shi, X.Wang, Y.Xia, C.Sun, C.Zhao, S.Li, W.Li, Molecular Catalysis 433
(2017)265-273.
[2] 195 (2016) 48- of T.Zhang, F.Qiu, J.Li, Applied Catalysis B:Environmental
58.
Specific embodiment
Following nonlimiting examples can with a person of ordinary skill in the art will more fully understand the present invention, but not with
Any mode limits the present invention.
1 Fe-Beta+MnO of embodimentx(FM) preparation and activity rating
1) system of Fe-Beta is each:
Carrier is used as using the Beta molecular sieve (Si/Al ≈ 9) of Template-free method synthesis, is passed through with ferrocene toluene solution
Volume impregnation method is prepared for a series of Fe-Beta catalyst.Specific steps are as follows: Na-Beta molecular sieve is placed in 0.5mol/ first
In the ammonium nitrate solution of L, it is vigorously stirred 4h at 80 DEG C, then filters, wash, and in 120 DEG C of dry 8~12h, gained sample
Again with after the exchange of same concentrations ammonium nitrate solution, NH is obtained4- Beta molecular sieve；Then, NH is accurately measured4- Beta molecule
The toluene saturated extent of adsorption of sieve, the amount of ferrocene needed for calculating are added wiring solution-forming in corresponding toluene, then by ferrocene first
Benzole soln is slowly added drop-wise to NH4It in-Beta molecular sieve, stirs evenly, is stored at room temperature 50h or more；Finally by gained sample quiet
It is calcined in state air, rise to 500 DEG C with the heating rate of 2~5 DEG C/min and 4h is kept to obtain Fe-Beta catalyst.
2)MnOxPreparation:
Appropriate manganese nitrate solution is added in deionized water, under agitation by Na2CO3Solution is added dropwise to pH and reaches
To 8.5~9.0.After aging 1h is stirred at room temperature, is filtered, washed.Obtained solid powder is placed in 110 DEG C of dry 6h in baking oven
Afterwards, further 400 DEG C of roasting 4h obtain MnO in Muffle furnacexCatalyst.
3)Fe-Beta+MnOx(FM) preparation:
By Fe-Beta and MnOxIt is mixed with 3: 1 mass ratio, two kinds of components is fully ground 40- using agate mortar
90min, and 500 DEG C are risen to the heating rate of 2~5 DEG C/min, it is roasted in air.
FM catalyst is in atmosphere containing the NH of propylene3There is preferably activity in-SCR reaction, 150 DEG C can reach 73%,
Conversion ratio can reach 90% or more in 200~350 DEG C of warm areas.And compared with Fe-Beta, the work of FM catalyst at 150 DEG C
Property improve 53%, illustrate add MnOxAfter auxiliary agent, catalyst low-temperature activity can be effectively improved.As temperature is into one
Step increases, and catalyst activity can further decline.Therefore, if being more conceived to low temperature active in practical application, that is, MnO can be usedx
As auxiliary agent, to catalyst modification.
2 Fe-Beta+CeO of embodiment2(FC) preparation and activity rating
The step of the present embodiment and process conditions and embodiment 1 are all the same, and difference is to use CeO2(the macro new material of Tianjin China
Co., Ltd) replacement MnOx, so that Fe-Beta+CeO be prepared2(FC) catalyst.
With CeO2As the catalyst FC of auxiliary agent, activity is slightly improved between 200~300 DEG C, and amplitude is not obvious.But
It is that the catalyst is preferable in high temperature active, the activity between 300~450 DEG C is 90% or more.
1 MnO of comparative examplex/CeO2Preparation and activity rating
MnOx/CeO2Preparation:
CeO2It is purchased from Tianjin Hua Hong new material Co., Ltd；By MnOxLoad capacity be set to 50%, and utilize deposition sedimentation
Method loads to carrier surface: first mixing appropriate manganese nitrate solution with carrier, then under agitation by Na2CO3Solution
Corresponding suspension is added dropwise and reaches 8.5~9.0 to pH；After aging 1h is stirred at room temperature, is filtered, washed；Obtained solid powder
End is placed in baking oven after 110 DEG C of dry 6h, and further 400 DEG C of roasting 4h obtain MnO in airx/CeO2Catalyst.
As can be seen that MnO from activityx/CeO2Catalyst activity within the scope of entire warm window is poor, and conversion ratio is only capable of reaching
To 70% or less.And as the temperature rises, activity decline is very fast, and at 450 DEG C, conversion ratio is 0.
3 Fe-Beta+MnO of embodimentx/CeO2(FMC3) preparation and activity rating
The step of the present embodiment and process conditions and embodiment 1 are all the same, and difference is to use MnOx/CeO2Replace MnOx(its
In, MnOx/CeO2Preparation method it is identical as comparative example 1), so that Fe-Beta+MnO be preparedx/CeO2(FMC3) it is catalyzed
Agent.
When by MnOx/CeO2When as auxiliary agent, 150 DEG C of catalyst of activity rises to 35% by 19%, and can 200~
The conversion ratio that 90% or more is kept between 400 DEG C, with simple Fe-Beta or MnOx/CeO2Activity compared to improve more, explanation
It can be obtained using catalyst prepared by mechanical mix techniques ideal as a result, effectively improving the NH in atmosphere containing propylene3-SCR
The activity of molecular sieve in reaction.
4 Fe-Beta+MnO of embodimentx/CeO2(FMC2) preparation and activity rating
The step of the present embodiment and process conditions and embodiment 3 are all the same, and difference is molecular sieve and MnOx/CeO2Matter
Amount ratio is changed to 2: 1, so that Fe-Beta+MnO be preparedx/CeO2(FMC2) catalyst.
By MnOx/CeO2Change with the ratio of molecular sieve, improves the content of oxides additive, the low temperature active meeting of catalyst
It is further promoted, can reach 41% conversion ratio at 150 DEG C.
5 Fe-Beta+MnO of embodimentx/CeO2(FMC1) preparation and activity rating
The step of the present embodiment and process conditions and embodiment 3 are all the same, and difference is molecular sieve and MnOx/CeO2Matter
Amount ratio is changed to 1: 1, so that Fe-Beta+MnO be preparedx/CeO2(FMC1) catalyst.
The amount of oxides additive is further increased, low temperature active will continue to be promoted.FMC1 sample and FMC2, FMC3 sample phase
Than having best low temperature active.150 DEG C can be obtained 59% NOxConversion ratio, meanwhile, the high temperature active of the sample also can
Be maintained at higher level, 450 DEG C be still able to maintain 80% or more conversion ratio.Anti-sulfur poisonous performance is also evaluation NH3- SCR is urged
The important indicator of agent.And with MnOx/CeO2FMC1 catalyst as auxiliary agent is in addition to reactivity with higher, additionally it is possible to
Contain SO in atmosphere2Under conditions of, about 70% conversion ratio is still kept after reaction 8 hours.With document
(MolecularCatalysis 433 (2017) 265-273, AppliedCatalysis B:Environmental195
(2016) 48-58) result compares, and the FMC1 catalyst in this patent all has superior conversion ratio and sulfur resistive in complete warm window
Poisoning performance provides effective ways for the industrial application of molecular sieve catalyst.
Claims (3)
1. a kind of preparation method for the Beta type molecular sieve that anti-propylene poisons, which is characterized in that load the channel diameter of Fe Beta type molecular sieve be substrate；Oxides additive is added into molecular screen base bottom, stirs evenly, grinding 40~
90min；Sample after mechanical mixture is ground is roasted 4 hours in 500 DEG C of air with the heating rate of 2~5 DEG C/min；
Wherein, the oxides additive is selected from MnOx, CeO2Or MnOx/CeO2, the MnOx/CeO2In, MnOxLoad capacity be 50%.
2. preparation method according to claim 1, which is characterized in that when oxides additive is added, molecular screen base bottom and oxidation
The mass ratio of object auxiliary agent is 0.5~3.5: l.
3. catalyst as claimed in claim 1 or 2 is in atmosphere containing the NH of propylene3It is applied in-SCR reaction.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110292944A (en) * | 2019-07-31 | 2019-10-01 | 北京工业大学 | A kind of ultra-wide temperature window SCR denitration and preparation method thereof |
| CN116060105A (en) * | 2023-02-20 | 2023-05-05 | 中国科学院城市环境研究所 | Composite catalyst with strong hydrocarbon poisoning resistance and application thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5376970A (en) * | 1976-12-21 | 1978-07-07 | Mitsubishi Heavy Ind Ltd | Removing mehod for mitrogen oxides and sulfur oxides contained in exhaust gas |
| CN1359311A (en) * | 1999-02-18 | 2002-07-17 | 大教堂有限公司 | Method for simul taneously abating nitric oxides and nitrous oxides in gases containing them |
| EP1314476A1 (en) * | 2001-11-26 | 2003-05-28 | Technische Universiteit Delft | Zeolite catalysts and their use in selective catalytic reduction of NOx |
| CN101011659A (en) * | 2007-02-07 | 2007-08-08 | 南开大学 | Catalyst for SCR denitration in boiler low-temperature fume and preparation method thereof |
| CN101259408A (en) * | 2008-04-15 | 2008-09-10 | 中国科学院山西煤炭化学研究所 | Catalyst for removing flue gas NOx under low temperature and preparation and application |
| CN101352680A (en) * | 2008-09-08 | 2009-01-28 | 浙江大学 | TiO2 supported manganese-cerium composite oxide catalyst and preparation method thereof |
| CN103143346A (en) * | 2013-03-12 | 2013-06-12 | 合肥工业大学 | Low-temperature SCR (Selective Catalytic Reduction) denitration catalyst with sulfur resistance and preparation method thereof |
| CN104772038A (en) * | 2015-03-25 | 2015-07-15 | 中国石油天然气股份有限公司 | Method for purifying acrylonitrile apparatus absorbing tower tail gas by using Pd-CeO2/Me-beta molecular sieve |
| CN106000455A (en) * | 2016-05-23 | 2016-10-12 | 天津包钢稀土研究院有限责任公司 | Environment-friendly SCR (Selective Catalytic Reduction) catalyst and preparation method thereof |
| CN107570205A (en) * | 2017-10-23 | 2018-01-12 | 上海歌通实业有限公司 | A kind of preparation method of modified Beta molecular sieve catalysts |
-
2018
- 2018-07-13 CN CN201810775419.2A patent/CN108993586B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5376970A (en) * | 1976-12-21 | 1978-07-07 | Mitsubishi Heavy Ind Ltd | Removing mehod for mitrogen oxides and sulfur oxides contained in exhaust gas |
| CN1359311A (en) * | 1999-02-18 | 2002-07-17 | 大教堂有限公司 | Method for simul taneously abating nitric oxides and nitrous oxides in gases containing them |
| EP1314476A1 (en) * | 2001-11-26 | 2003-05-28 | Technische Universiteit Delft | Zeolite catalysts and their use in selective catalytic reduction of NOx |
| CN101011659A (en) * | 2007-02-07 | 2007-08-08 | 南开大学 | Catalyst for SCR denitration in boiler low-temperature fume and preparation method thereof |
| CN101259408A (en) * | 2008-04-15 | 2008-09-10 | 中国科学院山西煤炭化学研究所 | Catalyst for removing flue gas NOx under low temperature and preparation and application |
| CN101352680A (en) * | 2008-09-08 | 2009-01-28 | 浙江大学 | TiO2 supported manganese-cerium composite oxide catalyst and preparation method thereof |
| CN103143346A (en) * | 2013-03-12 | 2013-06-12 | 合肥工业大学 | Low-temperature SCR (Selective Catalytic Reduction) denitration catalyst with sulfur resistance and preparation method thereof |
| CN104772038A (en) * | 2015-03-25 | 2015-07-15 | 中国石油天然气股份有限公司 | Method for purifying acrylonitrile apparatus absorbing tower tail gas by using Pd-CeO2/Me-beta molecular sieve |
| CN106000455A (en) * | 2016-05-23 | 2016-10-12 | 天津包钢稀土研究院有限责任公司 | Environment-friendly SCR (Selective Catalytic Reduction) catalyst and preparation method thereof |
| CN107570205A (en) * | 2017-10-23 | 2018-01-12 | 上海歌通实业有限公司 | A kind of preparation method of modified Beta molecular sieve catalysts |
Non-Patent Citations (4)
| Title |
|---|
| YONGJUN ZHOU ET AL.: ""Fe-doped Beta zeolite from organotemplate-free synthesis for NH3-SCR of NOx"", 《CATALYSIS SCIENCE & TECHNOLOGY》 * |
| YOUNG JIN KIM ET AL.: ""Mn-Fe/ZSM5 as a low-temperature SCR catalyst to remove NOx from diesel engine exhaust"", 《APPLIED CATALYSIS B：ENVIRONMENTAL》 * |
| 施赟: ""Cex-HBEA催化剂选择性催化还原NOx机制及其抗硫抗积炭特性"", 《中国博士学位论文全文数据库工程科技I辑》 * |
| 胡静: ""Mo基催化剂的制备及其在甲烷无氧芳构化反应中的研究"", 《中国博士学位论文全文数据库工程科技I辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110292944A (en) * | 2019-07-31 | 2019-10-01 | 北京工业大学 | A kind of ultra-wide temperature window SCR denitration and preparation method thereof |
| CN110292944B (en) * | 2019-07-31 | 2022-11-08 | 北京工业大学 | SCR denitration catalyst with ultra-wide temperature window and preparation method thereof |
| CN116060105A (en) * | 2023-02-20 | 2023-05-05 | 中国科学院城市环境研究所 | Composite catalyst with strong hydrocarbon poisoning resistance and application thereof |
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