CN108499570A - A kind of efficient catalytic decomposition N2Loaded catalyst of O and the preparation method and application thereof - Google Patents
A kind of efficient catalytic decomposition N2Loaded catalyst of O and the preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a kind of efficient catalytics to decompose N2Loaded catalyst of O and the preparation method and application thereof, the loaded catalyst is by the CuO of 5~15wt%, the Y of 5~15wt%2O3, 0.5~10wt% auxiliary agent and surplus boehmite roasting γ Al2O3Carrier is constituted, and auxiliary agent and CuO and Y as active component2O3It is supported on the γ Al of boehmite roasting2O3On carrier.Preparation method is the γ Al for first using equi-volume impregnating to roast boehmite2O3Carrier be put into containing copper nitrate, yttrium nitrate precursor solution in impregnated, drying, roasting, tabletting screening after can be prepared by.The loaded catalyst can be used for that N is catalytically decomposed at 400~500 DEG C2O.The load capacity of active component of the present invention is few but decomposition efficiency is high, and higher catalytic activity can be still kept in the presence of oxygen and vapor, and preparation method is simple, and catalysis is at low cost, not will produce secondary pollution.
Description
Technical field
The present invention relates to support type O composite metallic oxide catalyst fields more particularly to a kind of efficient catalytic to decompose N2O
Loaded catalyst and the preparation method and application thereof.
Background technology
Adipic acid and nitric acid are two kinds of important source materials in chemical field, but the tail discharged in adipic acid factory and nitric plant
N containing higher concentration mostly in gas2O.And N2O is a kind of serious greenhouse gases, and has to ozone layer in stratosphere
There is seriously destruction.According to statistics, the N that adipic acid factory and nitric plant are discharged every year2The amount of O accounts for about global N2O discharge capacitys
5%~10%, therefore N is carried out to the tail gas of adipic acid factory and nitric plant2O emission reduction works are very urgent.
Currently, the N in industrial emission reduction tail gas2There are mainly three types of methods by O：1. high-temperature decomposition：By N2O and flammable gas
Body is sent into incinerator together, and N is utilized at 800~1200 DEG C2The combustion-supporting property of O, is decomposed discharge.2. catalysis reduction
Method：Under the effect of the catalyst, using reducing agent, by N2O selectively decomposes discharge.3. catalytic decomposition：In certain temperature
Under, using catalyst, directly by N2O is catalytically decomposed into N2And O2.Wherein, catalytic decomposition have it is simple for process, at low cost, point
The advantages that solving efficient, non-secondary pollution, therefore become industrial tail gas N2The research hotspot of O emission reductions.
Catalytic decomposition emission reduction industrial tail gas N2The technological core of O is catalytic decomposition N2The exploitation of O catalyst.It is big in early stage
N mostly is catalytically decomposed using noble metal catalyst2O, though having higher degrading activity, cost is high, and water resistant is anti-
Toxicity is poor, therefore which prevent noble metal catalysts to be applied to industrial tail gas N2The large area of O is administered.In recent years, compound gold
Belong to oxide catalyst in catalytic decomposition N2Better characteristics, especially support type composite metal oxide catalyst are shown on O
Agent not only significantly reduces the cost of catalyst, but also the interaction between metal composite oxide so that catalyst
Low temperature active higher has been also equipped with the antitoxin harmful ability of certain water resistant antioxygen, therefore support type O composite metallic oxide catalyst
As the research hotspot of this field.But existing support type O composite metallic oxide catalyst, it needs to load a large amount of activearms
Point could have the catalytic decomposition efficiency for being equivalent to noble metal catalyst, and in the presence of oxygen and vapor catalytic activity compared with
Difference, preparation method is more complicated, be easy to cause secondary pollution.
Invention content
For above-mentioned shortcoming in the prior art, the present invention provides a kind of efficient catalytics to decompose N2The support type of O
The load capacity of catalyst and the preparation method and application thereof, active component is few but decomposition efficiency is high, and is deposited in oxygen and vapor
Higher catalytic activity can be still kept under, preparation method is simple, and catalysis is at low cost, not will produce secondary pollution, very suitable
For industrial tail gas N2The removing of O.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of efficient catalytic decomposition N2The loaded catalyst of O, by the Y of the CuO of 5~15wt%, 5~15wt%2O3、0.5
The auxiliary agent of~10wt% and the γ-Al of the boehmite roasting of surplus2O3Carrier is constituted, and auxiliary agent and as activity
The CuO and Y of component2O3It is supported on the γ-Al of boehmite roasting2O3On carrier.
Preferably, the auxiliary agent is the oxide of at least one of Ce, Mg, Mn, Fe.
Preferably, the γ-Al of the boehmite roasting2O3Carrier is using the common boehmite roastings of P-DF-03
γ-Al2O3Carrier, and specific surface area is 150~300m2/g。
A kind of efficient catalytic decomposition N2The preparation method of the loaded catalyst of O, including：
Step A, boehmite is put into Muffle furnace, 200 DEG C and constant temperature 2h is warming up to 5 DEG C/min, then with 5 DEG C/
Min is warming up to 550 DEG C and roasts 4h, to obtain the γ-Al of boehmite roasting2O3Carrier；
Step B, the γ-Al roasted according to boehmite described in every 5g2O3Carrier using 0.76~2.27g copper nitrates,
The ratio of 0.84~2.54g yttrium nitrates, 0~1.50g auxiliary agents and 3~5mL deionized waters adds copper nitrate, yttrium nitrate, auxiliary agent
Enter into deionized water, dissolve and be uniformly mixed, obtains precursor solution；Then the γ-the boehmite roasted
Al2O3Carrier is added in the precursor solution, is uniformly mixed, then is put and impregnated 6 into 30~50 DEG C of thermostat water bath
~8h, to the precursor after being impregnated；
Step C, the precursor after the dipping is put into drying box, with 80~110 DEG C of dry 10~12h, to obtain
Precursor after drying；
Step D, the precursor after the drying is put into Muffle furnace, 200 DEG C of simultaneously constant temperature 2h is warming up to 5 DEG C/min, then
It is warming up to 400~600 DEG C with 5 DEG C/min and roasts 4h, to obtain calcined catalyst powder；
Step E, the calcined catalyst powder is put into tablet press machine and carries out tabletting, then be ground screening, to
Above-mentioned efficient catalytic to finished product decomposes N2The loaded catalyst of O.
Preferably, the auxiliary agent is the oxide of at least one of Ce, Mg, Mn, Fe.
Preferably, the γ-Al of the boehmite roasting2O3Carrier is the common boehmite roastings of P-DF-03
γ-Al2O3Carrier, and specific surface area is 150~300m2/g。
Preferably, the efficient catalytic of finished product decomposes N2The granularity of the loaded catalyst of O is 20~40 mesh.
A kind of efficient catalytic decomposition N2Above-mentioned efficient catalytic is decomposed N by the application of the loaded catalyst of O2The load of O
Type catalyst is used to that N to be catalytically decomposed at 400~500 DEG C2O。
As seen from the above technical solution provided by the invention, efficient catalytic provided by the invention decomposes N2The load of O
Type catalyst is the γ-Al for first using equi-volume impregnating to roast boehmite according to special ratios2O3Carrier be put into containing
Copper nitrate, yttrium nitrate precursor solution in impregnated, drying, roasting, tabletting screening can be by auxiliary agent and work
For the CuO and Y of active component2O3It is supported on the γ-Al of boehmite roasting2O3On carrier, loaded catalyst is formed.This
The efficient catalytic that invention provides decomposes N2The load capacity of active component is few in the loaded catalyst of O but decomposition efficiency is high, can be
400~500 DEG C by the N in industrial tail gas2O is effectively catalytically decomposed to N2And O2, and still can in the presence of oxygen and vapor
Higher catalytic activity is kept, preparation method is simple, and catalysis is at low cost, not will produce secondary pollution, is suitable for adipic acid factory
With the N in the tail gas of nitric plant2O is removed.
Specific implementation mode
The technical solution in the present invention is clearly and completely described below, it is clear that described embodiment is only
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art exist
The every other embodiment obtained under the premise of creative work is not made, protection scope of the present invention is belonged to.
N is decomposed to efficient catalytic provided by the invention below2Loaded catalyst of O and the preparation method and application thereof carries out
Detailed description.The content not being described in detail in the embodiment of the present invention belongs to existing skill well known to professional and technical personnel in the field
Art.
A kind of efficient catalytic decomposition N2The loaded catalyst of O, by the Y of the CuO of 5~15wt%, 5~15wt%2O3、0.5
The auxiliary agent of~10wt% and the γ-Al of the boehmite roasting of surplus2O3Carrier is constituted, and auxiliary agent and as activity
The CuO and Y of component2O3It is supported on the γ-Al of boehmite roasting2O3On carrier.
Wherein, the auxiliary agent is the oxide of at least one of Ce, Mg, Mn, Fe.The boehmite roasting
γ-Al2O3Carrier is the γ-Al using the common boehmite roastings of P-DF-032O3Carrier, and specific surface area is preferably
150~300m2/g。
Specifically, which decomposes N2The preparation method of the loaded catalyst of O may include following steps：
Step A, prepared by carrier：Boehmite is put into Muffle furnace, 200 DEG C and constant temperature 2h are warming up to 5 DEG C/min,
550 DEG C are warming up to 5 DEG C/min again and roast 4h, to obtain the γ-Al of boehmite roasting2O3Carrier.Wherein, described
Boehmite is preferably with the common boehmites of P-DF-03.
Step B, precursor solution is prepared and is impregnated：γ-the Al roasted according to boehmite described in every 5g2O3Carrier makes
With the ratio of 0.76~2.27g copper nitrates, 0.84~2.54g yttrium nitrates, 0~1.50g auxiliary agents and 3~5mL deionized waters, by nitre
Sour copper, yttrium nitrate, auxiliary agent are add to deionized water, and are dissolved and are uniformly mixed, obtain precursor solution；It then will be described quasi-
γ-the Al of boehmite roasting2O3Carrier is added in the precursor solution, is uniformly mixed, then is put to 30~50 DEG C
6~8h is impregnated in thermostat water bath, to the precursor after being impregnated.
Step C, drying：Precursor after the dipping is put into drying box, with 80~110 DEG C of dry 10~12h, thus
Precursor after being dried.
Step D, it roasts：Precursor after the drying is put into Muffle furnace, 200 DEG C and constant temperature are warming up to 5 DEG C/min
2h, then be warming up to 400~600 DEG C with 5 DEG C/min and roast 4h, to obtain calcined catalyst powder.
Step E, tabletting is sieved：The calcined catalyst powder is put into tablet press machine and carries out tabletting, then is carried out with mortar
Grinding screening, the granularity to obtain finished product are that the above-mentioned efficient catalytic of 20~40 purposes decomposes N2The loaded catalyst of O.
Further, efficient catalytic provided by the present invention decomposes N2The loaded catalyst of O is mainly used for adipic acid factory
(main component of the industrial tail gas is N with the industrial tail gas of nitric plant's discharge2And N2O, also a small amount of O2、H2O and it is micro its
Its gas componant), it can be at 400~500 DEG C by the N in the industrial tail gas2O is catalytically decomposed to N2And O2, and in oxygen and water
Higher catalytic activity can be still kept in the presence of steam.
To sum up, the load capacity of active component is few in the present invention but decomposition efficiency is high, and is deposited in oxygen and vapor
Higher catalytic activity can be still kept under, preparation method is simple, and catalysis is at low cost, not will produce secondary pollution, is suitable for
To the N in the tail gas of adipic acid factory and nitric plant2O is removed.
In order to more clearly from show technical solution provided by the present invention and generated technique effect, below with tool
Body embodiment decomposes N to efficient catalytic provided by the present invention2Loaded catalyst of O and preparation method thereof is retouched in detail
It states.
Embodiment 1
A kind of efficient catalytic decomposition N2The loaded catalyst of O, preparation method may include following steps：
Step a1,1.82g copper nitrates, 1.35g yttrium nitrates are added in 4mL deionized waters, dissolve and is uniformly mixed,
Obtain precursor solution；Then γ-Al 5g boehmites roasted2O3Carrier is added in the precursor solution, stirring
It is uniformly mixed, then puts and impregnate 8h into 40 DEG C of thermostat water bath, to the precursor after being impregnated.
Step b1, drying：Precursor after the dipping is put into drying box, with 110 DEG C of dry 12h, to be done
Precursor after dry.
Step c1, it roasts：Precursor after the drying is put into Muffle furnace, 200 DEG C and constant temperature are warming up to 5 DEG C/min
2h, then be warming up to 550 DEG C with 5 DEG C/min and roast 4h, to obtain calcined catalyst powder.
Step d1, tabletting is sieved：The calcined catalyst powder is put into tablet press machine and carries out tabletting, then is carried out with mortar
Grinding screening, the granularity to obtain finished product are that the efficient catalytic of 20~40 mesh decomposes N2The loaded catalyst of O.
Specifically, it measures efficient catalytic made from the 1mL embodiment of the present invention 1 and decomposes N2The loaded catalyst of O, and use
Micro fixed-bed reactor detects it and N is catalytically decomposed2The activity of O, unstripped gas, which uses, contains 10vol%N2O and 5vol%O2Mixing
Gas, Balance Air N2, with normal pressure, volume space velocity 6000h-1Reaction condition, reacted using differential responses temperature, and detect
N in unstripped gas at a temperature of differential responses2The conversion ratio of O, result are as shown in table 1 below：
Table 1
Embodiment 2
A kind of efficient catalytic decomposition N2The loaded catalyst of O, preparation method may include following steps：
Step a2,1.82g copper nitrates, 2.25g yttrium nitrates are added in 4mL deionized waters, dissolve and is uniformly mixed,
Obtain precursor solution；Then γ-Al 5g boehmites roasted2O3Carrier is added in the precursor solution, stirring
It is uniformly mixed, then puts and impregnate 8h into 40 DEG C of thermostat water bath, to the precursor after being impregnated.
Step b2, drying：Precursor after the dipping is put into drying box, with 110 DEG C of dry 12h, to be done
Precursor after dry.
Step c2, it roasts：Precursor after the drying is put into Muffle furnace, 200 DEG C and constant temperature are warming up to 5 DEG C/min
2h, then be warming up to 550 DEG C with 5 DEG C/min and roast 4h, to obtain calcined catalyst powder.
Step d2, tabletting is sieved：The calcined catalyst powder is put into tablet press machine and carries out tabletting, then is carried out with mortar
Grinding screening, the granularity to obtain finished product are that the efficient catalytic of 20~40 mesh decomposes N2The loaded catalyst of O.
Specifically, it measures efficient catalytic made from the 1mL embodiment of the present invention 2 and decomposes N2The loaded catalyst of O, and use
Micro fixed-bed reactor detects it and N is catalytically decomposed2The activity of O, unstripped gas, which uses, contains 10vol%N2O and 5vol%O2Mixing
Gas, Balance Air N2, with normal pressure, volume space velocity 6000h-1Reaction condition, reacted using differential responses temperature, and detect
N in unstripped gas at a temperature of differential responses2The conversion ratio of O, result are as shown in table 2 below：
Table 2
| Reaction temperature | 417℃ | 451℃ | 488℃ |
| N2The conversion ratio of O | 10% | 50% | 99% |
Embodiment 3
A kind of efficient catalytic decomposition N2The loaded catalyst of O, preparation method may include following steps：
Step a3,1.82g copper nitrates, 2.25g yttrium nitrates and 1.02g cerous nitrates are added in 4mL deionized waters, are dissolved
And be uniformly mixed, obtain precursor solution；γ-the Al that 5g boehmites are roasted again2O3It is molten that carrier is added to the presoma
It in liquid, is uniformly mixed, then puts and impregnate 8h into 40 DEG C of thermostat water bath, to the precursor after being impregnated.
Step b3, drying：Precursor after the dipping is put into drying box, with 110 DEG C of dry 12h, to be done
Precursor after dry.
Step c3, it roasts：Precursor after the drying is put into Muffle furnace, 200 DEG C and constant temperature are warming up to 5 DEG C/min
2h, then be warming up to 550 DEG C with 5 DEG C/min and roast 4h, to obtain calcined catalyst powder.
Step d3, tabletting is sieved：The calcined catalyst powder is put into tablet press machine and carries out tabletting, then is carried out with mortar
Grinding screening, the granularity to obtain finished product are that the efficient catalytic of 20~40 mesh decomposes N2The loaded catalyst of O.
Specifically, it measures efficient catalytic made from the 1mL embodiment of the present invention 3 and decomposes N2The loaded catalyst of O, and use
Micro fixed-bed reactor detects it and N is catalytically decomposed2The activity of O, unstripped gas, which uses, contains 10vol%N2O and 5vol%O2Mixing
Gas, Balance Air N2, with normal pressure, volume space velocity 6000h-1Reaction condition, reacted using differential responses temperature, and detect
N in unstripped gas at a temperature of differential responses2The conversion ratio of O, result are as shown in table 3 below：
Table 3
| Reaction temperature | 400℃ | 435℃ | 476℃ |
| N2The conversion ratio of O | 10% | 50% | 99% |
Embodiment 4
A kind of efficient catalytic decomposition N2The loaded catalyst of O, preparation method may include following steps：
Step a4,1.82g copper nitrates, 2.25g yttrium nitrates are added in 4mL deionized waters, dissolve and be uniformly mixed, obtains
To precursor solution；γ-the Al that 5g boehmites are roasted again2O3Carrier is added in the precursor solution, is stirred
Uniformly, it then puts and impregnates 8h into 40 DEG C of thermostat water bath, to the precursor after being impregnated.
Step b4, drying：Precursor after the dipping is put into drying box, with 110 DEG C of dry 12h, to be done
Precursor after dry.
Step c4, it roasts：Precursor after the drying is put into Muffle furnace, 200 DEG C and constant temperature are warming up to 5 DEG C/min
2h, then be warming up to 550 DEG C with 5 DEG C/min and roast 4h, to obtain calcined catalyst powder.
Step d4, tabletting is sieved：The calcined catalyst powder is put into tablet press machine and carries out tabletting, then is carried out with mortar
Grinding screening, the granularity to obtain finished product are that the efficient catalytic of 20~40 mesh decomposes N2The loaded catalyst of O.
Specifically, it measures efficient catalytic made from the 1mL embodiment of the present invention 4 and decomposes N2The loaded catalyst of O, and use
Micro fixed-bed reactor detects it and N is catalytically decomposed2The activity of O, unstripped gas, which uses, contains 10vol%N2O and 5vol%O2Mixing
Gas, Balance Air N2, with normal pressure, volume space velocity 6000h-1, vapor containing 9.1vol% reaction condition, using different anti-
It answers temperature to be reacted, and detects at a temperature of differential responses N in unstripped gas2The conversion ratio of O, result are as shown in table 4 below：
Table 4
| Reaction temperature | 480℃ | 509℃ | 568℃ |
| N2The conversion ratio of O | 10% | 50% | 99% |
Embodiment 5
A kind of efficient catalytic decomposition N2The loaded catalyst of O, preparation method may include following steps：
Step a5,1.82g copper nitrates, 2.25g yttrium nitrates and 1.02g cerous nitrates are added in 4mL deionized waters, are dissolved
And be uniformly mixed, obtain precursor solution；γ-the Al that 5g boehmites are roasted again2O3It is molten that carrier is added to the presoma
It in liquid, is uniformly mixed, then puts and impregnate 8h into 40 DEG C of thermostat water bath, to the precursor after being impregnated.
Step b5, drying：Precursor after the dipping is put into drying box, with 110 DEG C of dry 12h, to be done
Precursor after dry.
Step c5, it roasts：Precursor after the drying is put into Muffle furnace, 200 DEG C and constant temperature are warming up to 5 DEG C/min
2h, then be warming up to 550 DEG C with 5 DEG C/min and roast 4h, to obtain calcined catalyst powder.
Step d5, tabletting is sieved：The calcined catalyst powder is put into tablet press machine and carries out tabletting, then is carried out with mortar
Grinding screening, the granularity to obtain finished product are that the efficient catalytic of 20~40 mesh decomposes N2The loaded catalyst of O.
Specifically, it measures efficient catalytic made from the 1mL embodiment of the present invention 5 and decomposes N2The loaded catalyst of O, and use
Micro fixed-bed reactor detects it and N is catalytically decomposed2The activity of O, unstripped gas, which uses, contains 10vol%N2O and 5vol%O2Mixing
Gas, Balance Air N2, with normal pressure, volume space velocity 6000h-1, vapor containing 9.1vol% reaction condition, using different anti-
It answers temperature to be reacted, and detects at a temperature of differential responses N in unstripped gas2The conversion ratio of O, result are as shown in table 5 below：
Table 5
| Reaction temperature | 472℃ | 504℃ | 551℃ |
| N2The conversion ratio of O | 10% | 50% | 99% |
Embodiment 6
A kind of efficient catalytic decomposition N2The loaded catalyst of O, preparation method may include following steps：
Step a6,1.82g copper nitrates, 2.25g yttrium nitrates and 1.02g cerous nitrates are added in 4mL deionized waters, are dissolved
And be uniformly mixed, obtain precursor solution；γ-the Al that 5g boehmites are roasted again2O3It is molten that carrier is added to the presoma
It in liquid, is uniformly mixed, then puts and impregnate 8h into 40 DEG C of thermostat water bath, to the precursor after being impregnated.
Step b6, drying：Precursor after the dipping is put into drying box, with 110 DEG C of dry 12h, to be done
Precursor after dry.
Step c6, it roasts：Precursor after the drying is put into Muffle furnace, 200 DEG C and constant temperature are warming up to 5 DEG C/min
2h, then be warming up to 550 DEG C with 5 DEG C/min and roast 4h, to obtain calcined catalyst powder.
Step d6, tabletting is sieved：The calcined catalyst powder is put into tablet press machine and carries out tabletting, then is carried out with mortar
Grinding screening, the granularity to obtain finished product are that the efficient catalytic of 20~40 mesh decomposes N2The loaded catalyst of O.
Specifically, it measures efficient catalytic made from the 1mL embodiment of the present invention 6 and decomposes N2The loaded catalyst of O, and use
Micro fixed-bed reactor detects it and N is catalytically decomposed2The activity of O, unstripped gas, which uses, contains 10vol%N2O and 5vol%O2Mixing
Gas, Balance Air N2, with normal pressure, volume space velocity 6000h-1Reaction condition, reactor constant temperature to 480 DEG C of successive reaction 200h,
And it detects efficient catalytic in the embodiment of the present invention 6 and decomposes N2The reaction stability of the loaded catalyst of O, result such as the following table 6
It is shown：
Table 6
| Reaction time | 50h | 100h | 200h |
| N2The conversion ratio of O | 98.14% | 98.08% | 98.69% |
To sum up, the load capacity of active component of the embodiment of the present invention is few but decomposition efficiency is high, and is steamed in oxygen and water
Higher catalytic activity can be still kept in the presence of gas, preparation method is simple, and catalysis is at low cost, not will produce secondary pollution.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (8)
1. a kind of efficient catalytic decomposes N2The loaded catalyst of O, which is characterized in that by the CuO of 5~15wt%, 5~15wt%
Y2O3, 0.5~10wt% auxiliary agent and surplus boehmite roasting γ-Al2O3Carrier constitute, and auxiliary agent with
And CuO and Y as active component2O3It is supported on the γ-Al of boehmite roasting2O3On carrier.
2. efficient catalytic according to claim 1 decomposes N2The loaded catalyst of O, which is characterized in that the auxiliary agent is
The oxide of at least one of Ce, Mg, Mn, Fe.
3. efficient catalytic according to claim 1 or 2 decomposes N2The loaded catalyst of O, which is characterized in that described quasi- thin
γ-the Al of diaspore roasting2O3Carrier is the γ-Al using the common boehmite roastings of P-DF-032O3Carrier, and compare table
Area is 150~300m2/g。
4. a kind of efficient catalytic decomposes N2The preparation method of the loaded catalyst of O, which is characterized in that including：
Step A, boehmite is put into Muffle furnace, is warming up to 200 DEG C and constant temperature 2h with 5 DEG C/min, then with 5 DEG C/min liters
Temperature is to 550 DEG C and roasts 4h, to obtain the γ-Al of boehmite roasting2O3Carrier；
Step B, the γ-Al roasted according to boehmite described in every 5g2O3Carrier using 0.76~2.27g copper nitrates, 0.84~
Copper nitrate, yttrium nitrate, auxiliary agent are added to by the ratio of 2.54g yttrium nitrates, 0~1.50g auxiliary agents and 3~5mL deionized waters
In ionized water, dissolves and be uniformly mixed, obtain precursor solution；Then γ-the Al boehmite roasted2O3Carrier
It is added in the precursor solution, is uniformly mixed, then put into 30~50 DEG C of thermostat water bath 6~8h of dipping, from
And the precursor after being impregnated；
Step C, the precursor after the dipping is put into drying box, with 80~110 DEG C of dry 10~12h, to obtain drying
Precursor afterwards；
Step D, the precursor after the drying is put into Muffle furnace, is warming up to 200 DEG C and constant temperature 2h with 5 DEG C/min, then with 5
DEG C/min is warming up to 400~600 DEG C and roasts 4h, to obtain calcined catalyst powder；
Step E, the calcined catalyst powder is put into tablet press machine and carries out tabletting, then be ground screening, to obtain into
Efficient catalytic described in any one of the claims 1 to 3 of product decomposes N2The loaded catalyst of O.
5. efficient catalytic according to claim 4 decomposes N2The preparation method of the loaded catalyst of O, which is characterized in that institute
The auxiliary agent stated is the oxide of at least one of Ce, Mg, Mn, Fe.
6. efficient catalytic according to claim 4 or 5 decomposes N2The preparation method of the loaded catalyst of O, feature exist
In the γ-Al of the boehmite roasting2O3Carrier is the γ-Al of the common boehmite roastings of P-DF-032O3Carrier,
And specific surface area is 150~300m2/g。
7. efficient catalytic according to claim 4 or 5 decomposes N2The preparation method of the loaded catalyst of O, feature exist
In the efficient catalytic of finished product decomposes N2The granularity of the loaded catalyst of O is 20~40 mesh.
8. a kind of efficient catalytic decomposes N2The application of the loaded catalyst of O, which is characterized in that will be in the claims 1 to 3
Any one of them efficient catalytic decomposes N2The loaded catalyst of O is used to that N to be catalytically decomposed at 400~500 DEG C2O。
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