CN105749959B - A kind of high-silica zeolite catalyst for nitrous oxide - Google Patents
A kind of high-silica zeolite catalyst for nitrous oxide Download PDFInfo
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- CN105749959B CN105749959B CN201610089866.3A CN201610089866A CN105749959B CN 105749959 B CN105749959 B CN 105749959B CN 201610089866 A CN201610089866 A CN 201610089866A CN 105749959 B CN105749959 B CN 105749959B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Abstract
The invention discloses a kind of molecular sieve catalyst for nitrous oxide and preparation method thereof, described method includes following steps：1）The alkali modification processing of molecular sieve；2）The sour modification of molecular sieve；3）The first of molecular sieve is metal-modified；4）The second of molecular sieve is metal-modified；First metal salt and second metal salt are the one or more in the nitrate selected from transition metal and noble metal, sulfate and carbonate.The catalyst of the method for the present invention production shows preferable performance and stability, and method is easy to large-scale industrial production, and production cost is low.
Description
Technical field
The present invention relates to field catalyst field, and in particular to a kind of high-silica zeolite for nitrous oxide is catalyzed
Agent.
Background technology
Nitrous oxide is considered as nontoxic gas for a long time.But the research of recent years shows, N2O is not only
Energy heavy damage ozone layer, and there are very strong greenhouse effects.N2The Global Warming potential (GWP) of O is CO respectively2310
Times, CH415 times.Moreover, it is highly stable in troposphere, average life span length.Therefore, exploitation can efficient removal N2The technology of O
Have important practical significance with method.
N2The most important industrial sources of O include the production of the aliphatic acid such as nitric acid, adipic acid, chemical fertilizer production and are oxidant with nitric acid
Industrial process.In adipic acid, often produce the appointment of 1t adipic acids and produce 0.27t N2O, its discharge capacity account for global total amount
10%.Also, there are the miscellaneous gas component H of higher concentration in the tail gas of discharge2O、NO、O2Deng.Will under the action of catalyst
N2O catalytic decompositions are N2And O2It is considered as most promising N2O control technologies.
That studied at present is applied to N2The catalyst of O catalytic decompositions mainly includes Engineering of Supported Metal Oxide Catalysts,
Such as MnOx/MgO(US5705136)；Hydrotalcite Derived Mixed Oxides, such as Rh0.01Mg0.71Al0.28O1.145(EP1262224B1)；
Spinel structure composite oxides, such as CuAlO4(US6723295B1).Although these catalysis materials with very high activity,
Be miscellaneous gas component presence can so that above-mentioned rapid catalyst deactivation or significantly inhibit its activity.
Research shows that molecular sieve catalyst, has uniform pore structure, good heat endurance, cheap cost.And
And in the H of higher concentration2O、NO、O2、SO2In the presence of, also with excellent stability and activity.These are found to be elimination life
Produce N in tail gas2The discharge of O provides great desired solution.
China Patent Publication No. CN101664694A discloses a kind of N prepared using infusion process2The molecule of O catalytic decompositions
Supported Co composite oxide catalysts are sieved, 550 DEG C or so are decomposed N completely2O.Due to the catalyst roast at high temperature it is obtained
(500~1000 DEG C), catalyst have preferable heat-resisting quantity.
China Patent Publication No. CN102380410A discloses a kind of catalytic decomposition N2The ferro-cobalt bimetallic catalyst of O.Urge
The expression formula of agent is：CoFe-MOR.The catalyst is by two step aqueous solution ion-exchange load C o and Fe, at 430 DEG C
N can be achieved2The conversion ratio of O gases 100%, and high stability.
China Patent Publication No. CN101450322A discloses one kind and uses FeCl3As precursor, pass through solid phase ion
Fe/ZSM-5 catalysis materials are prepared in the method for exchange.And increase work by adding the method for Ga, B, P and high-temperature roasting
Property position.The catalyst that this method obtains avoids the generation of bulk inertia iron oxide, reproducible.N can be achieved at 530 DEG C2O
Conversion ratio reach 100%, after adding Ga, 98% conversion ratio can be reached at 480 DEG C.But for the steady of catalyst
It is qualitative not refer to.
In conclusion molecular sieve catalyst is in N2Good application prospect is shown in the direct cartalytic decomposition effects of O, but
How high activity is prepared, the catalyst of high stability is crucial.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide a kind of for nitrous oxide
High-silica zeolite catalyst, to overcome the catalyst activity for being used for the decomposition of catalysis oxidation Asia nitrogen in the prior art not high, stability
The defects of bad.
To achieve these goals or other purposes, the present invention is achieved by the following technical solutions.
A kind of preparation method of molecular sieve catalyst for nitrous oxide, described method includes following steps：
1) the alkali modification processing of molecular sieve：Molecular sieve is mixed and stirred for aqueous slkali, is washed to neutrality, is dried after stirring
It is dry to obtain the molecular sieve carrier of alkali modification；
2) the sour modification of molecular sieve：The molecular sieve carrier of alkali modification is mixed and stirred for acid solution, after stirring
Washing to neutrality, drying roasting obtains the molecular sieve carrier of soda acid modification；
3) the first of molecular sieve is metal-modified：The molecular sieve carrier that soda acid is modified is mixed simultaneously with the first aqueous metal salt
Stirring, filtration washing dries roasting and obtains the first metal-modified molecular sieve to neutrality after stirring；
4) the second of molecular sieve is metal-modified：First metal-modified molecular sieve is mixed with the second aqueous metal salt
And water bath method, then dry the molecular sieve catalyst that roasting obtains bimetallic load；
First metal salt and second metal salt are the nitrate selected from transition metal and noble metal, sulfate and
One or more in carbonate.
Preferably, the transition metal is iron, cobalt, copper or nickel.
Preferably, the noble metal is platinum, ruthenium, palladium or iridium.
Preferably, the one or more in first metal salt is Fe nitrate, sulfate and carbonate.
Preferably, when second metal salt is the one or more in the nitrate, sulfate and carbonate of Co.
Preferably, one or more of the molecular sieve described in step 1) in MFI, Beta and MOR, by the molecular sieve
The content of middle Si and Al atoms is converted into SiO according to atomic molar number2Molecule and Al2O3Molecule, the SiO2Molecule and Al2O3Point
The molar ratio of son is 150~450.It is highly preferred that the molecular sieve is ZSM-5 molecular sieve or Beta molecular sieves.
Preferably, the concentration of aqueous slkali described in step 1) is 0.05~2mol/L, the aqueous slkali is NaOH, KOH,
Na2CO3And K2CO3In one or more aqueous solutions.
Preferably, counted on the basis of the volume of the aqueous slkali, the dosage of molecular sieve described in step 1) for 0.005~
1.5g/mL。
Preferably, the temperature being mixed in step 1) is 40~90 DEG C, and drying temperature is 60~140 DEG C.
Preferably, drying temperature is 120 DEG C.
Preferably, the time being mixed in step 1) is at least 1h.
Preferably, the concentration of acid solution described in step 2) is 0.05~2mol/L, and the acid solution is HNO3、HCl、
CH3COOH and H2CO3In one or more aqueous solutions.
Preferably, in step 2), counted on the basis of the volume of the acid solution, the dosage of the molecular sieve for 0.04~
0.06g/mL.It is highly preferred that the dosage of the molecular sieve is 0.05g/mL.
Preferably, it is 20~60 DEG C that temperature is mixed in step 2), and drying temperature is 60~140 DEG C.It is highly preferred that institute
Drying temperature is stated as 120 DEG C.
Preferably, the time being mixed in step 2) is at least 2h.
Preferably, calcination temperature is 550~650 DEG C in step 2).It is highly preferred that calcination temperature is 600 DEG C in step 2).
Preferably, in step 3), the concentration of first aqueous metal salt is 0.05~1mol/L；In step 4), institute
The concentration for stating the second aqueous metal salt is 0.05~2mol/L.
Preferably, in step 3), counted on the basis of the cumulative volume of first aqueous metal salt, the matter of the molecular sieve
Amount volumetric concentration is 0.04~0.06g/mL.It is highly preferred that the mass-volume concentration of the molecular sieve is 0.04~0.06g/mL.
Preferably, in step 3), drying temperature is 100~150 DEG C.It is highly preferred that drying temperature is 120 DEG C.
Preferably, in step 3), calcination temperature is 550~650 DEG C.It is highly preferred that calcination temperature is 600 DEG C.
Preferably, in step 4), counted on the basis of the cumulative volume of second aqueous metal salt, the matter of the molecular sieve
Amount volumetric concentration is 0.4~0.6g/mL.
Preferably, in step 4), drying temperature is 100~150 DEG C.It is highly preferred that in step 4), drying temperature 120
℃。
Preferably, in step 4), calcination temperature is 550~650 DEG C.It is highly preferred that in step 4), calcination temperature 600
℃。
Invention additionally discloses a kind of molecular sieve catalyst for nitrous oxide catalytic decomposition, by including method described above
Prepare.
The invention also discloses purposes of the molecular sieve catalyst as described above in nitrous oxide.
The preparation method of catalyst disclosed in the present invention has the advantages that：
A kind of method of modifying of high-silica zeolite carrier of the present invention, the amorphous substance by acid-base pretreatment to molecular sieve
The acidic site of kind, particle size, pore passage structure and carrier is adjusted, and metal salt presoma fully expands during being conducive to first
It is scattered in duct, improves ion-exchange degree.Furthermore it is possible to improve in the second process i.e. dipping process, the height point of active component
Dissipate property.The catalyst carrier obtained after soda acid processing at the same time still retains high silicon characteristic, has preferable hydrothermal stability.So as to
Catalyst shows preferable performance and stability.Its method is easy to large-scale industrial production, and production cost is low.
Brief description of the drawings
Fig. 1 is catalyst Z 150-a made from the catalyst Z 150-D and comparative example 1 prepared in embodiment 4 to N2O
The performance map of decomposition reaction.
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Please refer to Fig.1.It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only coordinating
The revealed content of specification, so that those skilled in the art understands and reads, it is enforceable to be not limited to the present invention
Qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size,
Do not influence under the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed technology contents
Obtain in the range of covering.Meanwhile cited such as " on ", " under ", "left", "right", " centre " and " one " in this specification
Term, be merely convenient to understanding for narration, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or
Adjustment, in the case where changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Embodiment 1
Choose SiO2Molecule and Al2O3Molecule molar ratio is 150 ZSM-5 molecular sieve, and the NaOH for preparing 0.05mol/L is molten
Liquid, the dosage and aqueous slkali volume ratio of molecular sieve are 0.005g/mL, and molecular sieve is added in aqueous slkali, control aqueous slkali
Temperature handles 1h at 40 DEG C, and filtration washing to efflux is neutrality.A whole night is dried at 120 DEG C, obtains the molecule of alkali modification
Sieve carrier.
Prepare 0.05mol/L HNO3Solution, is 0.05g/mL by the proportioning of molecular sieve and acid solution, by alkali modification molecule
Sieve carrier is added in acid solution, and 2h is stirred at 20 DEG C, and filtration washing to efflux is neutrality.The evening of drying one at 120 DEG C
On, 4h then is roasted at 600 DEG C, obtains the modified molecular sieve carrier of soda acid.
Prepare 0.05mol/L and contain Fe3+Aqueous solution, by molecular sieve and containing Fe3+The proportioning of aqueous solution be 0.05g/mL,
Modified molecular sieve carrier is added to containing Fe3+Aqueous solution in.24h is stirred at room temperature, filtration washing to efflux is
It is neutral.Dried a whole night at 120 DEG C, then 4h is roasted at 600 DEG C, obtain the molecular sieve of Fe modifications.
Configuration 0.05mol/L contains Co2+Aqueous solution, by molecular sieve and containing Co2+The proportioning of aqueous solution be 0.5g/mL, will
The molecular sieve that obtained Fe is modified is impregnated in containing Co2+Aqueous solution in, be sufficiently stirred, be then evaporated, connect under 60 DEG C of water-bath
And dried a whole night at 120 DEG C, then 4h is roasted at 600 DEG C, obtain the molecular sieve catalyst of Co, Fe modification, sample number into spectrum
For Z150-A.
Embodiment 2
The NaOH solution of 0.05mol/L is simply changed to the NaOH solution of 2mol/L, sample with embodiment 1 by preparation process
Numbering is Z150-B.
Embodiment 3
Preparation process is changed to embodiment 1, the simply dosage of molecular sieve and aqueous slkali volume ratio for 0.005g/mL
1.5g/mL, sample number into spectrum Z150-C.
Embodiment 4
Preparation process will simply control base extraction temperature at 40 DEG C to be changed to that base extraction temperature will be controlled with embodiment 1
At 90 DEG C, sample number into spectrum Z150-D.
Embodiment 5
Preparation process is with embodiment 1, simply by 0.05mol/L HNO3Solution is changed to 2mol/L HNO3Solution, sample number into spectrum
For Z150-E.
Embodiment 6
Preparation process with embodiment 1, simply will control acid treatment temperature be 20 DEG C, be changed to control acid treatment temperature as 60
DEG C, sample number into spectrum Z150-F.
Embodiment 7
Preparation process with embodiment 1, simply will control the acid treatment time be 2h, it is 12h to be changed to control the acid treatment time, sample
Product numbering is Z150-G.
Embodiment 8
Preparation process is with embodiment 1, and simply by the ZSM-5 molecular sieve that Si/Al ratio is 150, it is 450 to be changed to Si/Al ratio
ZSM-5 molecular sieve, sample number into spectrum Z450-A.
Embodiment 9
Preparation process is with embodiment 1, and simply by the ZSM-5 molecular sieve that Si/Al ratio is 150, it is 150 to be changed to Si/Al ratio
Beta molecular sieves, sample number into spectrum B450-A.
Embodiment 10
Preparation process will simply prepare 0.05mol/L and contain Fe with embodiment 13+Aqueous solution, be changed to prepare 1mol/L contain
Fe3+Aqueous solution, sample number into spectrum Z150-H.
Embodiment 11
Preparation process will simply prepare 0.05mol/L and contain Co with embodiment 12+Aqueous solution, be changed to prepare 2mol/L contain
Co2+Aqueous solution, sample number into spectrum Z150-I.
Embodiment 12
Choose SiO2Molecule and Al2O3Molecule molar ratio is 150 ZSM-5 molecular sieve, and the NaOH for preparing 0.05mol/L is molten
Liquid, the dosage and aqueous slkali volume ratio of molecular sieve are 0.005g/mL, and molecular sieve is added in aqueous slkali, control aqueous slkali
Temperature handles 1h at 40 DEG C, and filtration washing to efflux is neutrality.A whole night is dried at 120 DEG C, obtains the molecule of alkali modification
Sieve carrier；
Prepare 0.05mol/L HNO3Solution, is 0.05g/mL by the proportioning of molecular sieve and acid solution, by alkali modification molecule
Sieve carrier is added in acid solution, and 2h is stirred at 20 DEG C, and filtration washing to efflux is neutrality.The evening of drying one at 120 DEG C
On, 4h then is roasted at 600 DEG C, obtains the modified molecular sieve carrier of soda acid；
Prepare 0.05mol/L and contain Co2+Aqueous solution, by molecular sieve and containing Co2+The proportioning of aqueous solution be 0.05g/mL,
Modified molecular sieve carrier is added to containing Co2+Fe3+Aqueous solution in.24h, filtration washing to outflow is stirred at room temperature
Liquid is neutrality.Dried a whole night at 120 DEG C, then 4h is roasted at 600 DEG C, obtain the molecular sieve of Fe modifications.
Configuration 0.05mol/L contains Fe3+Aqueous solution, by molecular sieve and containing Fe3+The proportioning of aqueous solution be 0.5g/mL, will
The molecular sieve that obtained Co is modified is impregnated in containing Fe3+Aqueous solution in, be sufficiently stirred, be then evaporated, connect under 60 DEG C of water-bath
And dried a whole night at 120 DEG C, then 4h is roasted at 600 DEG C, obtain the molecular sieve catalyst that Co and Fe is modified.
Comparative example 1
The ZSM-5 molecular sieve material that Si/Al ratio is 150 is chosen, 0.05mol/L is prepared and contains Fe3+Aqueous solution, by molecular sieve
With containing Fe3+The proportioning of aqueous solution be 0.05g/mL, mother matrix molecular sieve carrier is added to containing Fe3+Aqueous solution in.In room temperature
Lower stirring 24h, filtration washing to efflux are neutrality.Dried a whole night at 120 DEG C, then 4h is roasted at 600 DEG C, obtain Fe
Modified molecular sieve.
Configuration 0.05mol/L contains Co2+Aqueous solution, by molecular sieve and containing Co2+The proportioning of aqueous solution be 0.5g/mL, will
The molecular sieve of obtained Fe loads is impregnated in containing Co2+Aqueous solution in, be sufficiently stirred, be then evaporated, connect under 60 DEG C of water-bath
And dried a whole night at 120 DEG C, then 4h is roasted at 600 DEG C, obtain the molecular sieve catalyst of Co, Fe modification, sample number into spectrum
For Z150-a.
Comparative example 2
Preparation process is with comparative example 1, and simply by the ZSM-5 molecular sieve that Si/Al ratio is 150, it is 450 to be changed to Si/Al ratio
ZSM-5 molecular sieve, sample number into spectrum Z450-a.
Comparative example 3
Preparation process is with comparative example 1, and simply by the ZSM-5 molecular sieve that Si/Al ratio is 150, it is 150 to be changed to Si/Al ratio
Beta molecular sieves, sample number into spectrum B450-a.
Comparative example 4
Preparation process will simply prepare 0.05mol/L and contain Fe with comparative example 13+Aqueous solution, be changed to prepare 1mol/L contain
Fe3+Aqueous solution, sample number into spectrum Z150-h.
Comparative example 5
Preparation process will simply prepare 0.05mol/L and contain Co with comparative example 12+Aqueous solution, be changed to prepare 2mol/L contain
Co2+Aqueous solution, sample number into spectrum Z150-i.
Catalyst performance evaluation condition：
By 0.4g embodiments 1~11, the sample of comparative example 1~5 is respectively charged into following fixed-bed quartz reactors.Catalysis
Material first purges 0.5h in 550 DEG C of pure Ar (60ml/min) atmosphere, is cooled to reacting initial temperature (275 DEG C or so), switches
Into hybrid reaction gas (5000ppm N2O+5%O2+ Ar Balance Airs), air speed is about 30000h-1.The heating schedule of reacting furnace
For：275 DEG C of initial reaction temperature, is a heating point every 25 DEG C, heating rate is 2.5 DEG C/min, is reacted to up to stable state
After carry out sampling analysis, the results are shown in Table 1.
T in table 150(DEG C) represents that conversion ratio reaches corresponding temperature spot when 50% in reaction.T90(DEG C) represents reaction transfer
Rate reaches corresponding temperature spot when 90%.As can be seen from Table 1, the present invention in catalyst compared with catalyst in comparative example,
Identical conversion ratio can be reached at lower temperatures.
The N of 1 embodiment 1~11 of table and 1~5 molecular sieve catalyst of comparative example2O decomposabilitys
Catalyst stability appreciation condition：
Simulate under working condition, done the high-silica zeolite hydrothermal stability of long period experimental evaluation modification.Specifically comment
Valency condition is as follows：0.4g catalyst Zs 150-A, Z150-D, Z450-A and B150-A are respectively charged into above-mentioned fixed bed quartz reaction
In device.Catalysis material first in 550 DEG C of pure Ar (60ml/min) atmosphere purges 0.5h, be cooled to respectively 400 DEG C, 425 DEG C, 415
DEG C, 390 DEG C switch to hybrid reaction gas (5000ppm N2O+5%O2+ 500ppm NO+5%H2O+Ar Balance Airs), air speed is about
For 30000h-1.Analyzed after being reacted to up to stable state, the reaction time continues 100h, and the results are shown in Table 2.
Table 2 simulates the stability of molecular sieve under working condition
The result shows that the molecular sieve catalyst loaded by soda acid modified bimetallic, passes through in the case where simulating working condition
The operation of 100h, the activity of molecular sieve catalyst keep stablizing, do not occur substantially inactivating.This shows molecular sieve prepared by the present invention
Catalysis material can be applied in industry.
Fig. 1 is catalyst Z 150-a made from the catalyst Z 150-D and comparative example 1 prepared in embodiment 4 to N2O
The performance map of decomposition reaction.There is the catalyst obtained it can be seen from figure using the method in the present invention higher reaction to live
Property.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (9)
1. a kind of preparation method of molecular sieve catalyst for nitrous oxide, described method includes following steps：
1) the alkali modification processing of molecular sieve：Molecular sieve and aqueous slkali are mixed and stirred for, filters and is washed into after stirring
Property, drying obtains the molecular sieve carrier of alkali modification；
2) the sour modification of molecular sieve：The molecular sieve carrier of alkali modification is mixed and stirred for acid solution, mistake after stirring
Filter and wash to neutrality, drying roasting and obtain the molecular sieve carrier of soda acid modification；
3) the first of molecular sieve is metal-modified：The molecular sieve carrier that soda acid is modified is mixed and stirred with the first aqueous metal salt
Mix, filtration washing dries roasting and obtain the first metal-modified molecular sieve to neutrality after stirring；
4) the second of molecular sieve is metal-modified：First metal-modified molecular sieve is mixed simultaneously with the second aqueous metal salt
Water bath method, then dry the molecular sieve catalyst that roasting obtains bimetallic load；
First metal salt and second metal salt are the nitrate selected from transition metal and noble metal, sulfate and carbonic acid
One or more in salt；
Counted on the basis of the volume of the aqueous slkali, the dosage of molecular sieve described in step 1) is 0.005~1.5g/mL；
In step 2), counted on the basis of the volume of the acid solution, the dosage of the molecular sieve is 0.04~0.06g/mL.
2. preparation method as claimed in claim 1, it is characterised in that：Molecular sieve described in step 1) is selected from MFI, Beta and MOR
In one or more, the content of Si and Al atoms in the molecular sieve is converted into SiO according to atomic molar number2Molecule and
Al2O3Molecule, the SiO2Molecule and Al2O3The molar ratio of molecule is (150~450)：1.
3. preparation method as claimed in claim 1, it is characterised in that：The concentration of aqueous slkali described in step 1) for 0.05~
2mol/L, the aqueous slkali are NaOH, KOH, Na2CO3、K2CO3In one or more aqueous solutions.
4. preparation method as claimed in claim 1, it is characterised in that：Whipping temp is 40~90 DEG C in step 1), drying temperature
For 60~140 DEG C.
5. preparation method as claimed in claim 1, it is characterised in that：The concentration of acid solution described in step 2) for 0.05~
2mol/L, the acid solution are HNO3、HCl、CH3COOH and H2CO3In one or more aqueous solutions.
6. preparation method as claimed in claim 1, it is characterised in that：Whipping temp is 20~60 DEG C in step 2), drying temperature
For 60~140 DEG C.
7. preparation method as claimed in claim 1, it is characterised in that：In step 3), the concentration of first aqueous metal salt
For 0.05~1mol/L；In step 4), the concentration of second aqueous metal salt is 0.05~2mol/L.
8. a kind of molecular sieve catalyst for nitrous oxide catalytic decomposition, is prepared by any the method for claim 1~7 and obtained
.
9. purposes of the molecular sieve catalyst as claimed in claim 8 in nitrous oxide.
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| EP3409358A1 (en) * | 2017-06-01 | 2018-12-05 | Paul Scherrer Institut | Method for preparing a sintering resistant alkali metal-zeolite supported metal catalyst for methane oxidation |
| CN112973777B (en) * | 2021-02-23 | 2022-10-21 | 浙江浙能技术研究院有限公司 | Low Ir-loaded catalyst for efficiently decomposing nitrous oxide and preparation method thereof |
| CN115430453A (en) * | 2022-09-27 | 2022-12-06 | 辽宁大学 | Low-temperature catalytic decomposition of N 2 O transition metal oxide catalyst and preparation method and application thereof |
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