CN101612572A - A kind of decomposing N that is used for 2The hexa-aluminate catalyzer of O - Google Patents

A kind of decomposing N that is used for 2The hexa-aluminate catalyzer of O Download PDF

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CN101612572A
CN101612572A CN200810115638A CN200810115638A CN101612572A CN 101612572 A CN101612572 A CN 101612572A CN 200810115638 A CN200810115638 A CN 200810115638A CN 200810115638 A CN200810115638 A CN 200810115638A CN 101612572 A CN101612572 A CN 101612572A
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hexa
decomposing
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aluminate
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宋永吉
李翠清
王虹
董留涛
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Beijing Institute of Petrochemical Technology
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Beijing Institute of Petrochemical Technology
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Abstract

A kind of decomposing N that is used for 2The hexa-aluminate catalyzer of O, this catalyst structure formula is: AM xAl 12-xO 19-δ, AM yM ' 1-yAl 11O 19-δ, A yA ' 1-yMAl 11O 19-δWherein, A, A ' are alkali metal, alkaline-earth metal or rare earth ion; M, M ' are transition metal ions; X and y represent atomicity, and δ is uncertain value.With described catalyst decomposing N 2During O, be to be the N of 100ppm-50% with concentration 2O is with 4800～50000h -1Air speed by hexa-aluminate catalyzer, temperature is 200 ℃ to 750 ℃.The present invention is used for decomposing N 2The hexa-aluminate catalyzer of O has active and stable preferably, to N 2O catalytic decomposition selectivity is better, is suitable for concentration range wide (100ppm-50%), also can be processed into different shape, is fit to reaction needed.

Description

A kind of decomposing N that is used for 2The hexa-aluminate catalyzer of O
Technical field
The present invention relates to a kind of decomposing N that is used for 2The catalyst of O specifically is meant a kind of decomposing N that is used for 2The hexa-aluminate catalyzer of O.
The invention still further relates to the purposes of this catalyst.
Background technology
N 2O is commonly called as laughing gas, is a kind of important atmosphere pollution, and it is not only a kind of greenhouse gases, and ozone layer is had destruction.N 2O is highly stable in stratosphere, and average life span reaches 150 years, and its greenhouse effects are respectively CO 2310 times, CH 421 times [Applied Catalysis B, 44 (2003) 117].In addition, N 2When O is transferred to stratosphere, can change into NO, ozone layer is had very big destruction [Science, 251 (1991) 932].Present N 2The O discharging comprises the combustion process of adipic acid production process, nitric acid production process and various chemical fuels mainly from industrial processes.Along with the continuous expansion of commercial production scale, N 2O concentration in atmosphere is the trend that rises year by year, and the speed of about 0.2%-0.3% increases [Applied Energy, 41,3 (1992) 177-200] with every year.Various countries have recognized N at present 2O is to the harm of earth environment, natural ecosystems, and developed countries such as the U.S., Germany, Japan are to N 2Broad research has been carried out in generation and the minimizing of O, and it is monitored as a conventional index.European Union clearly proposes N 2The discharge capacity of O is reduced to 2.0 * 105 tons/year from 1.2 * 106 tons/year, so that N 2The concentration stabilize of O in atmosphere is in the level [Applied Catalysis B:Environmental 9 (1996) 25] of 310ppbv.Research in this field of China is started late, and yet there are no open report in the application of industrial aspect.Along with people to N 2O is to the increasingly stringent that requires with environmental regulation that improves constantly of environmental hazard understanding, and theory and the application study strengthened in this respect have important practical significance.
N 2The direct catalytic decomposition of O is N in a kind of elimination industrial tail gas 2O is effective method relatively, is used for N at present both at home and abroad 2The catalyst that O directly decomposes mainly contains the active carbon class material of rare earth oxide, composite metal oxide, cation exchange zeolite, hydrotalcite thermal decomposition product, active carbon and metal oxide modified etc.These catalyst are to N 2Low temperature active during the catalytic decomposition of O has preferably, but at high temperature stable bad.Seek a kind of catalyst with high activity and high stability for eliminating N 2O has important meaning.
Hexa-aluminate is a kind of catalyst with better catalytic activity and high stability.In recent years, hexa-aluminate has obtained application study widely in a lot of fields, as methane catalytic combustion, methane reforming, fluorescent material etc.The general formula of hexa-aluminate is AAl 12O 19-δ, the A ion is made of alkali metal, alkaline-earth metal or rare earth ion usually, and its structure has Magnetoplumbate-type (MP) and β-Al 2O 3Two kinds on type [Applied Catalysis A, 138 (1996) 161-176].These two kinds of structures are layered oxide and are that the spinelle piece that is mutually into the mirror phase forms along the C uranium pile is long-pending, and this structure of hexa-aluminate makes it have good stable.
Summary of the invention
The objective of the invention is provides a kind of catalytic decomposition N that is used in order to overcome above-mentioned prior art deficiency 2The hexa-aluminate catalyzer of O, this catalyst has high activity and high stability.
The present invention also provides the purposes of this catalyst.
The objective of the invention is to be achieved through the following technical solutions:
A kind of decomposing N that is used for 2The hexa-aluminate catalyzer of O, this catalyst structure formula is: AM xAl 12-xO 19-δ, AM yM ' 1-yAl 11O 19-δ, A yA ' 1-yMAl 11O 19-δWherein, A, A ' are alkali metal, alkaline-earth metal or rare earth ion; M, M ' are transition metal ions.In the formula:
X represents atomicity, x=0,1,2,3,4,5,6,7,8,9,10.
Y represents atomicity, y=0,0.2,0.4,0.5,0.6,0.8,1.
δ is uncertain value.
Described alkali metal, alkaline-earth metal and rare earth metal are: a kind of or its combination of barium, calcium, strontium, lanthanum, cerium; Described transition metal is: a kind of or its combination of cobalt, copper, zinc, iron, nickel, manganese, zirconium, iridium, titanium, chromium.
This catalyst is used for catalytic decomposition N 2O generates N 2And O 2
With described catalyst decomposing N 2During O, be to be the N of 100ppm-50% with concentration 2O is with 4800～50000h -1Air speed by hexa-aluminate catalyzer, temperature is 200 ℃ to 750 ℃.
The preparation method of hexa-aluminate catalyzer has coprecipitation, metal alcoholysis method, gel sol method and anti-phase little liquid method.
Coprecipitation: get the nitrate of needed transition metal, alkaline-earth metal, rare earth metal and be mixed with mixed solution according to the accurate weighing of certain ratio, be acidified to pH=1, mix with aluminum nitrate solution with nitric acid.Be heated to 60 ℃ and constant temperature, under vigorous stirring, add suitable precipitant solution (K rapidly 2CO 3Solution, Na 2CO 3Solution, NaHCO 3Solution, (NH 4) 2CO 3Solution, ammoniacal liquor etc.), pH is between 7.5-8 in control.Back constant temperature stirred aging 3 hours, and excessive nitrate accumulating and carbonate are removed in centrifugal and washing, the back 110 ℃ dry 12 hours down, obtain predecessor, predecessor was in 500 ℃ of roastings 2 hours, back 1200 ℃ of roastings obtained required catalyst in 4 hours.
Metal alkoxide solution: a certain amount of aluminium isopropoxide is dissolved in respectively in the isopropyl alcohol, feeds the nitrogen vigorous stirring continuously, maintain the temperature at 80 ℃ and carried out alcoholysis reaction 3 hours, be cooled to room temperature.Accurately measure the nitrate of needed transition metal, alkaline-earth metal, rare earth metal according to certain ratio, be dissolved in (the amount mark that adds water substance is 1.5 times of aluminium isopropoxide) in a certain amount of deionized water and the alcohol.In the aluminium isopropoxide solution after the above-mentioned alcoholysis of the slow adding of obtain solution, gel forms fast, at room temperature leaves standstill then 12 hours, carries out decompression distillation, and the solvent in the gel is evaporated.Under 120 ℃, carry out drying and obtained powder in 3 hours, grind and to be placed in the Muffle furnace, burnt 4 hours, obtain required hexa-aluminate catalyzer in 1200 ℃ of following roastings in 500 ℃ of following roastings 2 hours.
Sol-gal process: accurately take by weighing needed transition metal according to certain ratio, alkaline-earth metal, the nitrate of rare earth metal, after dissolving mixes, the aqueous isopropanol (PEG) and citric acid solution or excessive PEG and citric acid solution that under 80 ℃ of constant temperature stirring conditions, add fast excessive citric acid solution or excessive polyethylene glycol, in the cellulose solution, the constant temperature continuous stirring is until forming colloidal sol, transfer gel through spending the night to after aging, the high speed centrifugation sediment separate out, the back is in 120 ℃ of oven dry down, insert after the grinding in the Muffle furnace in 500 ℃ of following roastings 2 hours, remove organic principle and decompose nitrate anion, in 1200 ℃ of roastings 4 hours, obtain required catalyst.
Reverse microemulsion process: the reverse microemulsion liquid system is water/PEG-200+ normal propyl alcohol/isooctane system or water/Triton X-100+ n-hexyl alcohol/cyclohexane system.Be configured to the reverse microemulsion liquid system under 25 ℃ of waters bath with thermostatic control, accurately take by weighing the nitrate of needed transition metal, alkaline-earth metal, rare earth metal according to certain ratio, dissolving is mixed into homogeneous solution.Under 25 ℃ of quick stirring condition of constant temperature, with two solution rapid mixing, control pH is about 8, stirring reaction 2 hours, and standing over night is aging, the high speed centrifugation sediment separate out, with sediment in 120 ℃ of oven dry, grind, insert in the Muffle furnace in 500 ℃ of roastings 2 hours, remove organic principle and decompose nitrate anion, in 1200 ℃ of roastings 4 hours, obtain required hexa-aluminate catalyzer.
The present invention is used for decomposing N 2The hexa-aluminate catalyzer of O has following outstanding characteristics:
1, under the condition of excess of oxygen and steam existence, showed active and stable preferably.
2, preparation technology is simple, and raw material is cheap to be easy to get, and catalyst is evenly single mutually, and mechanical performance and stability are good;
3, this catalyst is to N 2The selectivity of O catalytic decomposition is better, and the concentration range wide (100ppm-50%) that is suitable for, can be with N 2O resolves into N 2And O 2
4, the gained catalyst can be processed into different shape as required, to be fit to the needs of reaction.
The specific embodiment
Below by specific embodiment technical scheme of the present invention is described in further detail.
Adopt following experimental provision and analytical method and equipment to carry out the experiment of embodiment 1 to embodiment 6.
N 2Micro-reaction equipment, N in the reaction mixture gas are adopted in the experiment of O catalytic decomposition active testing 2The content of O is 12%, and surplus is mixing air (O 2Content be 8%).Control gas flow with mass flowmenter, total flow is 80ml/min miniature quartz reaction tube diameter f=8mm, air speed 4800h-1.The catalyst filling amount is 0.4g, 20～40 orders.Be reflected under the normal pressure and carry out, temperature programming speed is 4 ℃/min, 750 ℃ of the intensification limit.The GC3420 gas-chromatography on-line analysis of reactant and product.Use T 10%, T 50%, T 90%Represent N respectively 2O transforms 10%, 50%, 90% o'clock catalyst combustion reaction temperature.
Embodiment 1
Present embodiment is to prepare LaCo with coprecipitation xAl 12-xO 19-δ(x=0,1,2,4,6,8,10).
La (NO in molar ratio 3) 36H 2O: Co (NO 3) 26H 2O: Al (NO 3) 39H 2The accurate weighing sample of O=1: x: 12-x is earlier with La (NO 3) 36H 2O, Co (NO 3) 26H 2O is dissolved in and is mixed with solution in the proper amount of deionized water, is acidified to pH ≈ 1 with nitric acid, adds Al (NO again 3) 39H 2O solution is heated to 60 ℃ and constant temperature, adds saturated K under vigorous stirring rapidly 2CO 3Solution, pH is between 7.5-8 in control.Back constant temperature stirred aging 3 hours, and excessive nitrate accumulating and carbonate are removed in centrifugal and washing, and the back is 110 ℃ of following dried overnight.Grinding places 500 ℃ of roastings of Muffle furnace 2 hours, and back 1200 ℃ of roastings got hexa-aluminate catalyzer in 4 hours.Be designated as LCo xAl 2-x, L, A represent lanthanum (La), aluminium (Al) atom respectively in the formula, x represents the atomicity of cobalt.
Know that by table 1 data most preferred embodiment is: LCo 6A 6, i.e. LaCo 6Al 6O 19-δ, the temperature of initial action is 395 ℃, the temperature of complete reaction is 647 ℃.
Table 1.LaCo xAl 12-xO 19-δCatalytic decomposition N 2The activity of O
The catalyst title ??T 10％(℃) ??T 50％(℃) ??T 90％(℃)
??LA 12 ??603 ??684 ??-
??LCoA 11 ??546 ??635 ??708
??LCo 2A 10 ??527 ??625 ??712
??LCo 4A 8 ??483 ??600 ??709
??LCo 6A 6 ??395 ??467 ??647
??LCo 8A 4 ??439 ??530 ??686
??LCo 10A 2 ??458 ??569 ??-
Embodiment 2
Present embodiment is to prepare BaCo with coprecipitation xAl 12-xO 19-δ(x=2,4,6,8,10).
Ba (NO in molar ratio 3) 26H 2O: Co (NO 3) 26H 2O: Al (NO 3) 39H 2The accurate weighing sample of O=1: x: 12-x is with Ba (NO 3) 26H 2O, Co (NO 3) 26H 2O is dissolved in and is mixed with solution in the proper amount of deionized water, is acidified to pH ≈ 1 with nitric acid, adds Al (NO again 3) 39H 2O solution is heated to 60 ℃ and constant temperature, adds saturated K under vigorous stirring rapidly 2CO 3Solution, pH is between 7.5-8 in control.Back constant temperature stirred aging 3 hours, and excessive nitrate accumulating and carbonate are removed in centrifugal and washing, and the back is 110 ℃ of following dried overnight.Grinding is placed in the Muffle furnace 500 ℃ of roastings 2 hours, the back in 1200 ℃ of roastings 4 hours hexa-aluminate catalyzer.Be designated as BCo xA 12-x, B, A represent barium (Ba), aluminium (Al) atom respectively in the formula, x represents the atomicity of cobalt.
Know that by table 2 data most preferred embodiment is: BCo 8A 4, i.e. BaCo 8A 14O 19-δ, the temperature of initial action is 356 ℃, the temperature of complete reaction is 645 ℃.
Table 2.BaCo xAl 12-xO 19-δCatalytic decomposition N 2The activity of O
The catalyst title ??T 10％(℃) ??T 50％(℃) ??T 90％(℃)
??BCo 2A 10 ??537 ??645 ??-
??BCo 4A 8 ??616 ??707 ??-
??BCo 6A 6 ??502 ??575 ??645
??BCo 8A 4 ??356 ??466 ??573
??BCo 10A 2 ??506 ??619 ??705
Embodiment 3
Adopt coprecipitation to prepare LaMn xAl 12-xO 19-δ(x=1,3,5,7,9).
La (NO in molar ratio 3) 36H 2O: Mn (NO 3) 2: Al (NO 3) 39H 2The accurate weighing sample of O=1: x: 12-x is with La (NO 3) 36H 2O, 50%Mn (NO 3) 2Be dissolved in and be mixed with solution in the proper amount of deionized water, be acidified to pH ≈ 1, add Al (NO again with nitric acid 3) 39H 2O solution is heated to 60 ℃ and constant temperature, adds saturated (NH under vigorous stirring rapidly 4) 2CO 3Solution, pH is between 7.5-8 in control.Back constant temperature stirred aging 3 hours, and excessive nitrate accumulating and carbonate are removed in centrifugal and washing, and the back is 110 ℃ of following dried overnight.Grinding is placed in the Muffle furnace 500 ℃ of roastings 2 hours, back 1200 ℃ of roastings 4 hours hexa-aluminate catalyzer.Be designated as LMn xA 12-x, L, A represent lanthanum (La), aluminium (Al) atom respectively in the formula, x represents the atomicity of manganese.
Know that by table 4 data most preferred embodiment is: LMn 3A 9, i.e. LaMn 3Al 9O 19-δ, the temperature of initial action is 516 ℃, the temperature of complete reaction is 701 ℃
Table 3.LaMn xAl 12-xO 19-δCatalytic decomposition N 2The activity of O
The catalyst title ??T 10％(℃) ?T 50％(℃) ??T 90％(℃)
??LMnA 11 ??540 ?634 ??-
??LMn 3A 9 ??516 ?624 ??701
??LMn 5A 7 ??589 ?692 ??-
??LMn 7A 5 ??622 ?- ??-
??LMn 9A 3 ??628 ?- ??-
Embodiment 4
Present embodiment is to prepare LaCu with coprecipitation yZn 1-yAl 11O 19-δ(y=0,0.2,0.4,0.5,0.6,0.8,1).
La (NO in molar ratio 3) 36H 2O: Cu (NO 3) 23H 2O: Zn (NO 3) 26H 2O: Al (NO 3) 39H 2O=1: x: 1-x: 11 accurate weighing samples, with La (NO 3) 36H 2O, Cu (NO 3) 23H 2O, Zn (NO 3) 26H 2O is dissolved in and is mixed with solution in the proper amount of deionized water, is acidified to pH ≈ 1 with nitric acid, adds Al (NO again 3) 39H 2O solution is heated to 60 ℃ and constant temperature, adds saturated K under vigorous stirring rapidly 2CO 3Solution, pH is between 7.5-8 in control.Back constant temperature stirred aging 3 hours, and excessive nitrate accumulating and carbonate are removed in centrifugal and washing, and the back is 110 ℃ of following dried overnight.Grinding is placed in the Muffle furnace 500 ℃ of roastings 2 hours, back 1200 ℃ of roastings 4 hours hexa-aluminate.Be designated as LCu yZn 1-yA 11, L, A represent lanthanum (La), aluminium (Al) atom respectively in the formula, y represents the atomicity of copper.
Know that by table 4 data most preferred embodiment is: LCu 0.8Zn 0.2A 11, i.e. LaCu 0.8Zn 0.2Al 11O 19-δ, the temperature of initial action is 527 ℃, the temperature of complete reaction is 626 ℃
Table 4.LaCu yZn 1-yAl 11O 19-δCatalytic decomposition N 2The activity of O
The catalyst title ??T 10％(℃) ??T 50％(℃) ??T 90％(℃)
??LZnA 11 ??618 ??708 ??-
??LCu 0.2Zn 0.8A 11 ??572 ??648 ??701
??LCu 0.4Zn 0.6A 11 ??513 ??598 ??653
??LCu 0.5Zn 0.5A 11 ??536 ??604 ??650
??LCu 0.6Zn 0.4A 11 ??534 ??597 ??645
??LCu 0.8Zn 0.2A 11 ??527 ??592 ??626
??LCuA 11 ??503 ??569 ??628
Embodiment 5
Present embodiment is to use Prepared by Sol Gel Method LaCu yZn 1-yAl 11O 19-δ(y=0,0.2,0.4,0.5,0.6,0.8,1).
La (NO in molar ratio 3) 36H 2O: Cu (NO 3) 23H2O: Zn (NO 3) 26H 2O: Al (NO 3) 39H 2O=1: x: 1-x: 11 accurate weighing samples are mixed with mixed solution.Under 80 ℃ of constant temperature stirring conditions, add excessive citric acid solution fast, the constant temperature continuous stirring is until forming colloidal sol, leave standstill and transferred gel to after aging in 12 hours, the high speed centrifugation sediment separate out, the 120 ℃ of oven dry in back are inserted in the Muffle furnace 500 ℃ of roastings and were removed organic principle in 2 hours and decomposed nitrate anion after the grinding, 1200 ℃ of roastings 4 hours, obtain required hexa-aluminate catalyzer, be designated as: LCu yZn 1-yA 11, L, A represent lanthanum (La), aluminium (Al) atom respectively in the formula, y represents the atomicity of copper.
Know that by table 5 data the best example that realizes is: LCu 0.5Zn 0.5A 11, i.e. LaCu 0.5Zn 0.5Al 11O 19-δ, the temperature of initial action is 520 ℃, the temperature of complete reaction is 659 ℃.
Table 5.LaCu yZn 1-yAl 11O 19-δCatalytic decomposition N 2The activity of O
The catalyst title ??T 10％(℃) ??T 50％(℃) ??T 90％(℃)
??LZnA 11 ??411 ??- ??-
??LCu 0.2Zn 0.8A 11 ??606 ??722 ??-
??LCu 0.4Zn 0.6A 11 ??606 ??687 ??-
??LCu 0.5Zn 0.5A 11 ??520 ??596 ??659
??LCu 0.6Zn 0.4A 11 ??571 ??654 ??708
??LCu 0.8Zn 0.2A 11 ??548 ??633 ??692
??LCuA 11 ??541 ??622 ??676
Embodiment 6
Present embodiment is to use prepared by reverse microemulsion method LaCoMAl 10O 19-δ(M=Cu, Ce, Fe, Ni).
The reverse microemulsion liquid system that adopts is water/PEG200/ normal propyl alcohol/isooctane.Nitrate according to certain molar ratio weighing copper (Cu), cerium (Ce), iron (Fe), nickel (Ni) is dissolved in certain water gaging, respectively with La (NO 3) 3Solution evenly mixes; Nitrate aqueous solution is joined in volume ratio PEG200/ normal propyl alcohol/isooctane=3: 36: 13 mixed liquor as water, fully mix, form the reverse microemulsion liquid system with magnetic stirring apparatus.Under 30 ℃ of constant temperature water baths, aluminium isopropoxide fully is dissolved in the absolute ethyl alcohol by stirring, form the ethanolic solution of uniform aluminium isopropoxide.Again aluminium isopropoxide solution slowly is added drop-wise in the reverse microemulsion liquid system, stirs, fully mix, left standstill 12 hours.The high speed centrifugation sediment separate out 120 ℃ of dryings 12 hours, 1200 ℃ of following roastings 4 hours, promptly obtains hexa-aluminate catalyzer.Be designated as: LCoMA 10, L, A represent lanthanum (La), aluminium (Al) atom respectively in the formula.
Know that by table 6 data the best example that realizes is: LCoNiA 10, i.e. LaCoNiAl 10O 19-δ, the temperature of initial action is 524 ℃, the temperature of complete reaction is 649 ℃.
Table 6.LaCoMAl 10O 19-δCatalytic decomposition N 2The activity of O
The catalyst title ??T 10％(℃) ??T 50％(℃) ??T 90％(℃)
??LCoCuA 10 ??540 ??629 ??673
??LCoCeA 10 ??575 ??668 ??-
??LCoFeA 10 ??603 ??695 ??-
??LCoNiA 10 ??524 ??600 ??649

Claims (4)

1, a kind of decomposing N that is used for 2The hexa-aluminate catalyzer of O, this catalyst structure formula is: AM xAl 12-xO 19-δ, AM yM ' 1-yAl 11O 19-δ, A yA ' 1-yMAl 11O 19-δ, wherein, A, A ' are alkali metal, alkaline-earth metal or rare earth ion; M, M ' are transition metal ions; In the formula:
X represents atomicity, x=0, and 1,2,3,4,5,6,7,8,9,10,
Y represents atomicity, y=0, and 0.2,0.4,0.5,0.6,0.8,1,
δ is uncertain value.
2, catalyst according to claim 1 is characterized in that: described alkali metal, alkaline-earth metal and rare earth metal are: a kind of or its combination of barium, calcium, strontium, lanthanum, cerium; Described transition metal is: a kind of or its combination of cobalt, copper, zinc, iron, nickel, manganese, zirconium, iridium, titanium, chromium.
3, according to the described decomposing N that is used for of claim 1 2The hexa-aluminate catalyzer of O is characterized in that: this catalyst is used for catalytic decomposition N 2O generates N 2And O 2
4, according to the described decomposing N that is used for of claim 1 2The hexa-aluminate catalyzer of O is characterized in that: with described catalyst decomposing N 2During O, be to be the N of 100ppm-50% with concentration 2O is with 4800～50000h -1Air speed by hexa-aluminate catalyzer, temperature is 200 ℃ to 750 ℃.
CN200810115638A 2008-06-26 2008-06-26 A kind of decomposing N that is used for 2The hexa-aluminate catalyzer of O Pending CN101612572A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101874980A (en) * 2010-04-26 2010-11-03 中国科学院生态环境研究中心 Application of transition-metal substituted type hexaaluminate high-temperature catalytic material in enameled-wire waste gas treatment
JP2013230471A (en) * 2008-10-03 2013-11-14 Rhodia Operations Method of decomposing n2o using catalyst based on cerium lanthanum oxide
CN106881108A (en) * 2017-01-25 2017-06-23 中国天辰工程有限公司 A kind of laughing gas decomposition catalyst preparation method
CN106994341A (en) * 2017-04-20 2017-08-01 北京石油化工学院 For photocatalysis Decomposition N2O catalyst and its production and use
CN112871149A (en) * 2021-01-26 2021-06-01 中国科学院大学 Hexaaluminate catalyst and method for preparing sulfur by selective oxidation of hydrogen sulfide under medium-high temperature condition by using hexaaluminate catalyst
CN114811624A (en) * 2021-01-22 2022-07-29 中国科学院大学 DMF-containing waste gas purification and collaborative production N 2 Method of O

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013230471A (en) * 2008-10-03 2013-11-14 Rhodia Operations Method of decomposing n2o using catalyst based on cerium lanthanum oxide
CN101874980A (en) * 2010-04-26 2010-11-03 中国科学院生态环境研究中心 Application of transition-metal substituted type hexaaluminate high-temperature catalytic material in enameled-wire waste gas treatment
CN101874980B (en) * 2010-04-26 2014-03-26 中国科学院生态环境研究中心 Application of transition-metal substituted type hexaaluminate high-temperature catalytic material in enameled-wire waste gas treatment
CN106881108A (en) * 2017-01-25 2017-06-23 中国天辰工程有限公司 A kind of laughing gas decomposition catalyst preparation method
CN106881108B (en) * 2017-01-25 2019-06-25 中国天辰工程有限公司 A kind of laughing gas decomposition catalyst preparation method
CN106994341A (en) * 2017-04-20 2017-08-01 北京石油化工学院 For photocatalysis Decomposition N2O catalyst and its production and use
CN106994341B (en) * 2017-04-20 2020-07-03 北京石油化工学院 For photocatalytic decomposition of N2Catalyst of O and preparation method and application thereof
CN114811624A (en) * 2021-01-22 2022-07-29 中国科学院大学 DMF-containing waste gas purification and collaborative production N 2 Method of O
CN112871149A (en) * 2021-01-26 2021-06-01 中国科学院大学 Hexaaluminate catalyst and method for preparing sulfur by selective oxidation of hydrogen sulfide under medium-high temperature condition by using hexaaluminate catalyst

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Application publication date: 20091230