CN106732573A - For often wet catalyst for eliminating ozone of room temperature and preparation method thereof - Google Patents
For often wet catalyst for eliminating ozone of room temperature and preparation method thereof Download PDFInfo
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- CN106732573A CN106732573A CN201611036236.6A CN201611036236A CN106732573A CN 106732573 A CN106732573 A CN 106732573A CN 201611036236 A CN201611036236 A CN 201611036236A CN 106732573 A CN106732573 A CN 106732573A
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Abstract
The present invention provides a kind of for often wet catalyst for eliminating ozone of room temperature and preparation method thereof, and catalyst includes carrier, noble metal active component and adjuvant component；Wherein, noble metal active component is palladium；Noble metal active component is calculated as 0.01% the 0.1% of catalyst gross mass with precious metal element.With advantages below：Provided by the present invention for the often wet catalyst for eliminating ozone of room temperature, in to colloid drying process, using the drying of baking oven high temperature, the intersection drying means that low temperature is freezed and baking oven high temperature is dried again, the uniform pore diameter of the catalyst being thus prepared into, specific surface area are big, there is elimination factor very high to ozone；Provided by the present invention for the often wet catalyst for eliminating ozone of room temperature, the noble metal active component for being used is extremely low with the percentage that precious metal element is calculated as catalyst gross mass, so as to effectively reduce the cost of catalyst.
Description
Technical field
The present invention relates to a kind of catalyst, and in particular to a kind of for the often wet catalyst for eliminating ozone of room temperature and its preparation
Method.
Background technology
Ozone is a kind of gas pollutant very big to human health damage, especially in relatively closed indoor environment
In.Ozone can almost react with any biological tissue, and the destructiveness to respiratory tract is very strong.It is generally believed that after in ozone suction body,
The very strong free radical-super oxygen base (O of activity can be quickly converted to2-), make unsaturated fat acid oxidase, so as to cause cellular damage.
According to the introduction of Canadian occupational health and safety center (CCOHS), " ozone can stimulate and damage schneiderian membrane and respiratory tract, this
Kind stimulate it is light then trigger cough uncomfortable in chest, abscess of throat, it is heavy then trigger asthma, cause upper respiratory disease to deteriorate, it is also possible to cause
Decreased lung function, pulmonary emphysema and lung injury, and it is often unrepairable that these are damaged." therefore to asthma,
For the people of pulmonary emphysema and chronic bronchitis, as long as in the ozone of low concentration, may all be produced significantly to them
Harm.Equally, ozone can also stimulate eyes, make visual sensitivity and eyesight reduction.The vitamin that ozone can be also destroyed in skin
E, allows skin wrinkle long, blackspot；When ozone concentration is more than 200 micrograms/cubic meter, central nervous system can be damaged, allow people
Headache, pectoralgia, thinking ability decline.Additionally, ozone can hinder blood oxygen therapy function, histanoxia is caused；Make thyroid function
Impaired, bone calcification.Borrow's temperature spy Butterworth professor of Scripps applied science research institute of the U.S. has ever done research, sends out
Existing ozone can destroy the immunity function of human body, induce lymphocyte chromosome distortion, damage the activity of some enzymes and produce haemolysis
Reaction.
One of main source of ozone is the course of work of the spark, xerography and television set of releasing in motor rotation,
So, electromechanical room, xerography computer room, computer room etc. be all ozone occurred frequentlyly.Another main source is anti-photochemistry
The pollution sources such as the secondary pollution that should be produced, automobile, factory enter the volatile organic contaminant (VOCs) and nitrogen oxidation of air
The primary pollutions such as thing (NOx), under strong solar ulatraviolet radiation, absorb the energy of sunshine, make original chemical chain
Destroyed, the secondary pollutions such as photochemical reaction, generation ozone, Peroxyacetyl nitrate are occurred.Participate in photochemical reaction mistake
The primary pollution of journey and the mixture of secondary pollution are referred to as photochemical fog.Ozone be photochemical fog it is main into
Point.
Catalytic removal ozone is the effective technology for reducing indoor ozone pollution, however, existing all kinds of catalytic removal ozone
Catalyst, generally with following deficiency：Ozone elimination factor is low, catalyst high cost, so as to be unfavorable for promoting the use of.
The content of the invention
For prior art exist defect, the present invention provide it is a kind of for room temperature often it is wet eliminate ozone catalyst and its
Preparation method, can effectively solve the above problems.
The technical solution adopted by the present invention is as follows：
The present invention provides a kind of for the often wet catalyst for eliminating ozone of room temperature, and the catalyst includes that carrier, noble metal are lived
Property component and adjuvant component；Wherein, the carrier be silica, alundum (Al2O3), ceria, nickel oxide in two kinds or
Person two or more constituted compounds or mixture；The noble metal active component is palladium；The adjuvant component is in sodium, potassium
A kind of alkali metal；Wherein, the noble metal active component is calculated as the 0.01%- of catalyst gross mass with precious metal element
0.1%；The auxiliary agent is calculated as the 0.01%-0.20% of catalyst gross mass with alkali metal.
Preferably, the adjuvant component is the oxide or inorganic salts that a kind of alkali metal in sodium or potassium is formed.
Preferably, the specific surface area of catalyst is 300~500m2/g。
The present invention also provides a kind of preparation method for the often wet catalyst for eliminating ozone of room temperature, disappears for room temperature to be often wet
Except the catalyst of ozone is prepared using following methods：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium, during the palladium of fine-powdered put into water, ultrasound
Dispersion 20~30 minutes, then, in selected ratio to adjuvant component is added in solution, makes palladium mix with adjuvant component, and ultrasound is anti-
Answer 2 hours~3 hours, be made colloid；
Step S2, by selected support dispersion to above-mentioned colloid, is placed in 36~50 hours in 60~100 degree of water-baths, sinks
After product is complete, be placed in filter cake in baking oven by filtration washing, and baking oven initial temperature is 70 degree, is made by the programming rate of 0.2 degree min
Oven temperature is raised to 90 degree, and in 90 degree of dryings 30 minutes；Then, oven temperature is made to be risen from 90 degree by the programming rate of 1 degree min
To 130 degree, and in 130 degree of dryings 60 minutes；Then, freeze-drying is carried out to filter cake, i.e.,：First since -10 spend, by 5 degree/
The cooling rate divided, makes cryogenic temperature be reduced to -40 degree from -10 degree, and dried 10 minutes in -40 degree；Then, by 0.5 degree min
Cooling rate, make cryogenic temperature from -40 degree be reduced to -70 degree, and -70 degree dry 20 minutes；
Finally, filter cake is placed in baking oven, baking oven initial temperature is 70 degree, and oven temperature is made by the programming rate of 5 degree mins
180 degree is raised to from 70 degree, and is dried 3 hours~4 hours in 180 degree, obtain catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 0.5~2 hour in argon gas atmosphere, roasting
It is 600~1700 degree to burn temperature, that is, obtain finished catalyst.
There is advantages below provided by the present invention for often wet catalyst for eliminating ozone of room temperature and preparation method thereof：
Provided by the present invention for the often wet catalyst for eliminating ozone of room temperature, in colloid drying process, using baking oven
High temperature drying, the intersection drying means that low temperature is freezed and baking oven high temperature is dried again, and heating rate, rate of temperature fall etc. are carried out
Precise controlling, the uniform pore diameter of the catalyst being thus prepared into, specific surface area are big, there is elimination factor very high to ozone；
Provided by the present invention for the often wet catalyst for eliminating ozone of room temperature, the noble metal active component for being used is with your gold
The percentage that category element is calculated as catalyst gross mass is extremely low, so as to effectively reduce the cost of catalyst.
Provided by the present invention for the often wet catalyst for eliminating ozone of room temperature, using any pretreatment is not needed preceding, can grow
Phase preserves and uses.
Brief description of the drawings
Fig. 1 is the schematic flow sheet provided by the present invention for the often wet method for preparing catalyst for eliminating ozone of room temperature.
Specific embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect become more apparent, below in conjunction with
Drawings and Examples, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to
The present invention is explained, is not intended to limit the present invention.
Method for preparing catalyst embodiment 1
Raw material：Carrier is the compound of silica and alundum (Al2O3)；Noble metal active component is palladium；Adjuvant component is
Sodium oxide molybdena；
Preparation method：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium 0.02g, during the palladium of fine-powdered put into water,
Ultrasonic disperse 25 minutes, then, to adjuvant component sodium oxide molybdena is added in solution, its sodium content is 0.15g, makes palladium and adjuvant component
Mixing, ultrasonic reaction 2 hours is made colloid；
Step S2, selected carrier 100g is distributed in above-mentioned colloid, is placed in 40 hours in 80 degree of water-baths, and deposition is complete
Afterwards, filtration washing, filter cake is placed in baking oven, and baking oven initial temperature is 70 degree, and baking oven temperature is made by the programming rate of 0.2 degree min
Degree is raised to 90 degree, and in 90 degree of dryings 30 minutes；Then, oven temperature is made to be raised to 130 from 90 degree by the programming rate of 1 degree min
Degree, and in 130 degree of dryings 60 minutes；Then, freeze-drying is carried out to filter cake, i.e.,：First since -10 spend, by 5 degree mins
Cooling rate, makes cryogenic temperature be reduced to -40 degree from -10 degree, and dried 10 minutes in -40 degree；Then, by the drop of 0.5 degree min
Warm speed, makes cryogenic temperature be reduced to -70 degree from -40 degree, and dried 20 minutes in -70 degree；
Finally, filter cake is placed in baking oven, baking oven initial temperature is 70 degree, and baking oven temperature is made by the programming rate of 5 degree mins point
Degree is raised to 180 degree from 70 degree, and is dried 3 hours~4 hours in 180 degree, obtains catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 2 hours in argon gas atmosphere, roasting temperature
It is 1700 degree to spend, that is, obtain finished catalyst.The specific surface area of catalyst is 500m2/g。
Method for preparing catalyst embodiment 2
Raw material：Carrier is the mixture of alundum (Al2O3) and ceria；Noble metal active component is palladium；Adjuvant component is
Sodium nitrate；
Preparation method：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium 0.1g, during the palladium of fine-powdered put into water,
Ultrasonic disperse 20 minutes, then, to adjuvant component sodium nitrate is added in solution, its sodium content is 0.09g, makes palladium and adjuvant component
Mixing, ultrasonic reaction 2 hours is made colloid；
Step S2, selected carrier 100g is distributed in above-mentioned colloid, is placed in 50 hours in 100 degree of water-baths, has been deposited
Be placed in filter cake in baking oven by Quan Hou, filtration washing, and baking oven initial temperature is 70 degree, and baking oven is made by the programming rate of 0.2 degree min
Temperature is raised to 90 degree, and in 90 degree of dryings 30 minutes；Then, oven temperature is made to be raised to from 90 degree by the programming rate of 1 degree min
130 degree, and in 130 degree of dryings 60 minutes；Then, freeze-drying is carried out to filter cake, i.e.,：First since -10 spend, by 5 degree mins
Cooling rate, make cryogenic temperature from -10 degree be reduced to -40 degree, and -40 degree dry 10 minutes；Then, by 0.5 degree min
Cooling rate, makes cryogenic temperature be reduced to -70 degree from -40 degree, and dried 20 minutes in -70 degree；
Finally, filter cake is placed in baking oven, baking oven initial temperature is 70 degree, and oven temperature is made by the programming rate of 5 degree mins
180 degree is raised to from 70 degree, and is dried 3 hours~4 hours in 180 degree, obtain catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 0.5~2 hour in argon gas atmosphere, roasting
It is 600 degree to burn temperature, that is, obtain finished catalyst.The specific surface area of catalyst is 500m2/g。
Method for preparing catalyst embodiment 3
Raw material：Carrier is the mixture of ceria and nickel oxide；Noble metal active component is palladium；Adjuvant component is oxidation
Potassium；
Preparation method：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium 0.01g, during the palladium of fine-powdered put into water,
Ultrasonic disperse 25 minutes, then, to adjuvant component potassium oxide is added in solution, its potassium content is 0.10g, makes palladium and adjuvant component
Mixing, ultrasonic reaction 2 hours is made colloid；
Step S2, selected carrier 100g is distributed in above-mentioned colloid, is placed in 40 hours in 80 degree of water-baths, and deposition is complete
Afterwards, filtration washing, filter cake is placed in baking oven, and baking oven initial temperature is 70 degree, and baking oven temperature is made by the programming rate of 0.2 degree min
Degree is raised to 90 degree, and in 90 degree of dryings 30 minutes；Then, oven temperature is made to be raised to 130 from 90 degree by the programming rate of 1 degree min
Degree, and in 130 degree of dryings 60 minutes；Then, freeze-drying is carried out to filter cake, i.e.,：First since -10 spend, by 5 degree mins
Cooling rate, makes cryogenic temperature be reduced to -40 degree from -10 degree, and dried 10 minutes in -40 degree；Then, by the drop of 0.5 degree min
Warm speed, makes cryogenic temperature be reduced to -70 degree from -40 degree, and dried 20 minutes in -70 degree；
Finally, filter cake is placed in baking oven, baking oven initial temperature is 70 degree, and oven temperature is made by the programming rate of 5 degree mins
180 degree is raised to from 70 degree, and is dried 3 hours~4 hours in 180 degree, obtain catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 0.5~2 hour in argon gas atmosphere, roasting
It is 1000 degree to burn temperature, that is, obtain finished catalyst.The specific surface area of catalyst is 400m2/g。
Method for preparing catalyst embodiment 4
Raw material：Carrier is the mixture of nickel oxide and silica, and its mass ratio is 1：1；Noble metal active component is palladium；
Adjuvant component is potassium nitrate；
Preparation method：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium 0.05g, during the palladium of fine-powdered put into water,
Ultrasonic disperse 26 minutes, then, to adjuvant component potassium nitrate is added in solution, its potassium content is 0.08g, makes palladium and adjuvant component
Mixing, ultrasonic reaction 3 hours is made colloid；
Step S2, selected carrier 100g is distributed in above-mentioned colloid, is placed in 40 hours in 70 degree of water-baths, and deposition is complete
Afterwards, filtration washing, filter cake is placed in baking oven, and baking oven initial temperature is 70 degree, and baking oven temperature is made by the programming rate of 0.2 degree min
Degree is raised to 90 degree, and in 90 degree of dryings 30 minutes；Then, oven temperature is made to be raised to 130 from 90 degree by the programming rate of 1 degree min
Degree, and in 130 degree of dryings 60 minutes；Then, freeze-drying is carried out to filter cake, i.e.,：First since -10 spend, by 5 degree mins
Cooling rate, makes cryogenic temperature be reduced to -40 degree from -10 degree, and dried 10 minutes in -40 degree；Then, by the drop of 0.5 degree min
Warm speed, makes cryogenic temperature be reduced to -70 degree from -40 degree, and dried 20 minutes in -70 degree；
Finally, filter cake is placed in baking oven, baking oven initial temperature is 70 degree, and oven temperature is made by the programming rate of 5 degree mins
180 degree is raised to from 70 degree, and is dried 3 hours~4 hours in 180 degree, obtain catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 0.5~2 hour in argon gas atmosphere, roasting
It is 1500 degree to burn temperature, that is, obtain finished catalyst.The specific surface area of catalyst is 450m2/g。
Method for preparing catalyst embodiment 5
Raw material：Carrier is the mixture of silica and nickel oxide；Noble metal active component is palladium；Adjuvant component is oxidation
Sodium；
Preparation method：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium 0.07g, during the palladium of fine-powdered put into water,
Ultrasonic disperse 26 minutes, then, to adjuvant component sodium oxide molybdena is added in solution, its sodium content is 0.02g, makes palladium and adjuvant component
Mixing, ultrasonic reaction 3 hours is made colloid；
Step S2, selected carrier 100g is distributed in above-mentioned colloid, is placed in 40 hours in 70 degree of water-baths, and deposition is complete
Afterwards, filtration washing, filter cake is placed in baking oven, and baking oven initial temperature is 70 degree, and baking oven temperature is made by the programming rate of 0.2 degree min
Degree is raised to 90 degree, and in 90 degree of dryings 30 minutes；Then, oven temperature is made to be raised to 130 from 90 degree by the programming rate of 1 degree min
Degree, and in 130 degree of dryings 60 minutes；Then, freeze-drying is carried out to filter cake, i.e.,：First since -10 spend, by 5 degree mins
Cooling rate, makes cryogenic temperature be reduced to -40 degree from -10 degree, and dried 10 minutes in -40 degree；Then, by the drop of 0.5 degree min
Warm speed, makes cryogenic temperature be reduced to -70 degree from -40 degree, and dried 20 minutes in -70 degree；
Finally, filter cake is placed in baking oven, baking oven initial temperature is 70 degree, and oven temperature is made by the programming rate of 5 degree mins
180 degree is raised to from 70 degree, and is dried 3 hours~4 hours in 180 degree, obtain catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 0.5~2 hour in argon gas atmosphere, roasting
It is 1000 degree to burn temperature, that is, obtain finished catalyst.The specific surface area of catalyst is 500m2/g。
Method for preparing catalyst embodiment 6
Raw material：Carrier is the compound of ceria and nickel oxide；Noble metal active component is palladium；Adjuvant component is oxidation
Potassium；
Preparation method：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium 0.04g, during the palladium of fine-powdered put into water,
Ultrasonic disperse 30 minutes, then, to adjuvant component potassium oxide is added in solution, its potassium content is 0.20g, makes palladium and adjuvant component
Mixing, ultrasonic reaction 2 hours is made colloid；
Step S2, selected carrier 100g is distributed in above-mentioned colloid, is placed in 36 hours in 70 degree of water-baths, and deposition is complete
Afterwards, filtration washing, filter cake is placed in baking oven, and baking oven initial temperature is 70 degree, and baking oven temperature is made by the programming rate of 0.2 degree min
Degree is raised to 90 degree, and in 90 degree of dryings 30 minutes；Then, oven temperature is made to be raised to 130 from 90 degree by the programming rate of 1 degree min
Degree, and in 130 degree of dryings 60 minutes；Then, freeze-drying is carried out to filter cake, i.e.,：First since -10 spend, by 5 degree mins
Cooling rate, makes cryogenic temperature be reduced to -40 degree from -10 degree, and dried 10 minutes in -40 degree；Then, by the drop of 0.5 degree min
Warm speed, makes cryogenic temperature be reduced to -70 degree from -40 degree, and dried 20 minutes in -70 degree；
Finally, filter cake is placed in baking oven, baking oven initial temperature is 70 degree, and oven temperature is made by the programming rate of 5 degree mins
180 degree is raised to from 70 degree, and is dried 3 hours~4 hours in 180 degree, obtain catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 0.5~2 hour in argon gas atmosphere, roasting
It is 900 degree to burn temperature, that is, obtain finished catalyst.The specific surface area of catalyst is 450m2/g。
Checking example
Reference examples 1：
Raw material：Carrier is the compound of silica and alundum (Al2O3)；Noble metal active component is palladium；Adjuvant component is
Sodium oxide molybdena；
Preparation method：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium 0.02g, during the palladium of fine-powdered put into water,
Ultrasonic disperse 25 minutes, then, to adjuvant component sodium oxide molybdena is added in solution, its sodium content is 0.15g, makes palladium and adjuvant component
Mixing, ultrasonic reaction 2 hours is made colloid；
Step S2, selected carrier 100g is distributed in above-mentioned colloid, is placed in 40 hours in 80 degree of water-baths, and deposition is complete
Afterwards, filtration washing, filter cake is placed in baking oven, and is dried 5 hours in 180 degree, obtains catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 2 hours in argon gas atmosphere, roasting temperature
It is 1700 degree to spend, that is, obtain finished catalyst.
That is, this reference examples is with the difference of method for preparing catalyst embodiment 1：Baking oven in step S2 is high
Temperature drying, the intersection drying means that low temperature is freezed and baking oven high temperature is dried again, directly replace with baking oven high temperature dry processes.By
This prepares finished catalyst.
Reference examples 2- reference examples 6：Respectively by method for preparing catalyst embodiment 2-6 the step of S2, be revised as：By what is selected
Carrier 100g is distributed in above-mentioned colloid, is placed in 40 hours in 80 degree of water-baths, and after deposition is complete, be placed in for filter cake by filtration washing
In baking oven, and dried 5 hours in 180 degree, obtain catalyst semi-finished product.Other all conditions are constant, obtain reference examples 2- pairs
As usual 6.
For the catalyst that embodiment 1-6, reference examples 1-6 are prepared, 500g catalyst is taken respectively, be positioned over 20 cubes
In rice test chamber, ozone concentration is 1.0mg/m3, relative humidity 50%, 20 DEG C of centrifugal blowers driving gases are by catalyst test
Module, wind speed is 1m/s or so, and reaction temperature is room temperature, and ozone concentration is according to national standard《Ozone is surveyed in public place air
Determine method》(GB/T18204.26-2000) sodium indigotindisulfonate spectrophotometry.Result such as following table institute after reacting 15 minutes
Show：
Ozone oxidation activity contrast under different catalysts room temperature condition
The experiment more than is as can be seen that the catalyst for preparing of the invention, noble metal platinum active component is with noble metal
Element is calculated as less than the 0.1% of catalyst gross mass, but, its elimination factor to ozone more than 98%, therefore, to ozone
Elimination factor it is very high.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (4)
1. it is a kind of for the often wet catalyst for eliminating ozone of room temperature, it is characterised in that the catalyst includes carrier, noble metal active
Component and adjuvant component；Wherein, the carrier be silica, alundum (Al2O3), ceria, nickel oxide in two kinds or
Two or more constituted compounds or mixture；The noble metal active component is palladium；The adjuvant component is in sodium, potassium
A kind of alkali metal；Wherein, the noble metal active component is calculated as the 0.01%- of catalyst gross mass with precious metal element
0.1%；The auxiliary agent is calculated as the 0.01%-0.20% of catalyst gross mass with alkali metal.
2. it is according to claim 1 for the often wet catalyst for eliminating ozone of room temperature, it is characterised in that the adjuvant component
Oxide or inorganic salts that a kind of alkali metal in for sodium or potassium is formed.
3. it is according to claim 1 for the often wet catalyst for eliminating ozone of room temperature, it is characterised in that the ratio table of catalyst
Area is 300~500m2/g。
4. the preparation method of the often wet catalyst for eliminating ozone of room temperature, its feature are used for described in a kind of any one of claim 1-3
It is to be prepared using following methods for the often wet catalyst for eliminating ozone of room temperature：
Step S1,400 mesh fine powders are ground to form by noble metal active component palladium, during the palladium of fine-powdered put into water, ultrasonic disperse
20~30 minutes, then, in selected ratio to adjuvant component is added in solution, palladium is set to mix with adjuvant component, ultrasonic reaction 2 is small
When~3 hours, it is made colloid；
Step S2, by selected support dispersion to above-mentioned colloid, is placed in 36~50 hours in 60~100 degree of water-baths, has deposited
Be placed in filter cake in baking oven by Quan Hou, filtration washing, and baking oven initial temperature is 70 degree, and baking oven is made by the programming rate of 0.2 degree min
Temperature is raised to 90 degree, and in 90 degree of dryings 30 minutes；Then, oven temperature is made to be raised to from 90 degree by the programming rate of 1 degree min
130 degree, and in 130 degree of dryings 60 minutes；Then, freeze-drying is carried out to filter cake, i.e.,：First since -10 spend, by 5 degree mins
Cooling rate, make cryogenic temperature from -10 degree be reduced to -40 degree, and -40 degree dry 10 minutes；Then, by 0.5 degree min
Cooling rate, makes cryogenic temperature be reduced to -70 degree from -40 degree, and dried 20 minutes in -70 degree；
Finally, filter cake is placed in baking oven, baking oven initial temperature is 70 degree, and oven temperature from 70 is made by the programming rate of 5 degree mins
Degree is raised to 180 degree, and is dried 3 hours~4 hours in 180 degree, obtains catalyst semi-finished product；
Step S3, the catalyst semi-finished product that will be obtained are placed in Muffle furnace, are calcined 0.5~2 hour in argon gas atmosphere, roasting temperature
It is 600~1700 degree to spend, that is, obtain finished catalyst.
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