CN106390983A - CeO2 catalyst with Ce-based metal-organic framework used as precursor, method for preparing CeO2 catalyst and application of CeO2 catalyst to preventing and remedying air pollution - Google Patents
CeO2 catalyst with Ce-based metal-organic framework used as precursor, method for preparing CeO2 catalyst and application of CeO2 catalyst to preventing and remedying air pollution Download PDFInfo
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/864—Removing carbon monoxide or hydrocarbons
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Abstract
The invention provides a CeO2 catalyst with a Ce-based metal-organic framework used as a precursor, a method for preparing the CeO2 catalyst and application of the CeO2 catalyst to preventing and remedying air pollution. The method includes steps of firstly, mixing cerium sources and organic ligands with one another to obtain mixtures, then dissolving the mixtures in solvents and stirring the mixtures and the solvents until the mixtures are completely dissolved to obtain mixed liquid; secondly, placing the mixed liquid in a reaction kettle and carrying out reaction on the mixed liquid at certain reaction temperatures for a period of time to obtain reactants; thirdly, washing, filtering and drying the reactants to obtain Ce-based metal-organic framework materials; fourthly, calcining the Ce-based metal-organic framework materials to obtain the CeO2 catalyst with the Ce-based metal-organic framework used as the precursor. The CeO2 catalyst, the method and the application have the advantages that the method is simple and is easy to implement and applicable to industrial production, the prepared CeO2 catalyst with the Ce-based metal-organic framework used as the precursor is stable in performance and can be used for catalytically oxidizing CO and eliminating volatile organic pollutants and nitrogen oxide with sulfur dioxide atmosphere.
Description
Technical field
The invention belongs to inorganic nano catalysis material field is and in particular to one kind is with Ce Base Metal organic backbone as presoma
CeO2Catalyst, its preparation method and the application in Air Pollution prevention and control.
Background technology
With the development of modern industry, environmental pollution is on the rise, and preventing and treating environmental pollution has become as and is related to the state meter people
Raw key subjects.Particularly automobile exhaust pollution becomes one of main source of atmospheric pollution, and main in vehicle exhaust
First pollutant are CO.Because what construction material, house decorative material and life and office appliance etc. came out various waves
Send out property Organic substance also at every moment endangering the physical and mental health of the mankind, so, CO and VOC of exploitation efficient stableSCatalyst
Have very important significance.
Using relatively inexpensive metal, such as Ce, can substitute or part substitutes noble metal gold (Au), platinum (Pt), palladium
(Pd) etc., there is preferable commercial application prospect.But at present for CO and VOCSOxidation, purification effect is less desirable.
Xin Liang(Xin Liang；Junjia Xiao；Biaohua Chen；and Yadong Li.Inorg
Chem.2010,49,8188 8190) etc. using conventional hydrothermal method preparation CeO2Mesoporous Spheres, at 400 DEG C, the conversion ratio of CO reaches
To 100%.Lei Wang(Lei Wang；Lin-Fei Zhang；Sheng-Liang Zhong；An-Wu Xu.Applied
Surface Science.263 (2012) 769 776) etc. using hydro-thermal method synthesis pie CeO2Catalyst, CO at 390 DEG C
Conversion ratio reach 90%.Not only reaction temperature is high for these cerium metal oxide catalyst, and is extremely difficult to convert completely, institute
To be difficult to realize industrialized production.
Content of the invention
The present invention is to carry out to solve the above problems it is therefore intended that providing a kind of catalysis activity height, dusty gass
High conversion rate, can be suitably used for the CeO with Ce Base Metal organic backbone as presoma of industrialized production simultaneously2Catalyst and its system
Preparation Method and the application in Air Pollution prevention and control.
Present invention employs following technical scheme：
The invention provides a kind of CeO with Ce Base Metal organic backbone as presoma of high stability2Catalyst, has
Such feature, the specific surface area of catalyst is 20～120m2/ g, aperture is 1～5nm, including：Organic ligand and being supported on
Ce elements on organic ligand, wherein, Ce elements are 1.3 with the mol ratio of organic ligand:1～1.7:1, Ce elements are in catalyst
In weight content be 10%～25%, organic ligand weight content in the catalyst be 10%～23%.
The Ce Base Metal organic backbone providing in the present invention is the CeO of presoma2In catalyst, can also have such
Feature：Organic ligand is selected from any one in trimesic acid, p-phthalic acid, oxalic acid and succinic acid.
Present invention also offers a kind of above-mentioned Ce Base Metal organic backbone is the CeO of presoma2The preparation method of catalyst,
It is characterized in that, comprise the steps：Step one, weighs cerium source and organic ligand by a certain percentage, is stirred at room temperature and makes it
It is dissolved completely in solvent, obtain mixed liquor；Step 2, the mixed liquor obtaining in step one is transferred to politef
In the stainless steel cauldron of liner, react 2～24 hours under certain reaction temperature, obtain reactant；Step 3, by step 2
The reactant obtaining washs, filters, is dried, and obtains Ce Base Metal organic framework material；Step 4, by the Ce obtaining in step 3
Base Metal organic framework material is calcined under certain sintering temperature and calcination atmosphere, obtains with Ce Base Metal organic backbone as forerunner
The CeO of body2Catalyst.
The CeO with Ce Base Metal organic backbone as presoma that the present invention provides2In the preparation method of catalyst, acceptable
Have the feature that：In step one, solvent is DMF；Cerium source is cerous nitrate or cerous nitrate ammonia.Wherein,
Organic ligand, described cerium source, the mol ratio of described solvent are 1:0.59～0.77:0.0271～0.043；In step 2, instead
Temperature is answered to be 100～200 DEG C；In step 3, the method being dried is vacuum and heating drying or vacuum lyophilization, heating in vacuum
The temperature being dried is 50～80 DEG C, and the time is 5～24 hours, and the temperature of vacuum lyophilization is -80～-20 DEG C, the time is 5～
24 hours；In step 4, sintering temperature is 400～700 DEG C, and calcination atmosphere is CO, O2、H2、N2, any one in He and Ar
Plant or its gaseous mixture, the time is 1～6 hour.
Present invention also offers a kind of above-mentioned Ce Base Metal organic backbone is the CeO of presoma2Catalyst is in preventing and treating environment
Application in pollution.
Invention effect and effect
The CeO with Ce Base Metal organic backbone as presoma being provided according to the present invention2Catalyst and preparation method thereof and
Application, the preparation method is that being dissolved in solvent after cerium source is mixed with organic ligand, stirring and being mixed to after be completely dissolved
Close liquid, then mixed liquor is placed in reactor, reaction under certain reaction temperature obtains reactant after a period of time, will react
Thing carries out washing, filters, be dried after obtain Ce Base Metal organic framework material, had obtaining after this material calcination with Ce Base Metal
Machine skeleton is the CeO of presoma2Catalyst.This preparation method is simple, easy to operate it is adaptable to industrialized production, using this preparation
The CeO with Ce Base Metal organic backbone as presoma that method is obtained2Catalyst performance stabilised, can be used in CO catalytic oxidation with
And eliminate volatile organic contaminant, the nitrogen oxides containing sulfur dioxide atmosphere.
Brief description
Fig. 1 is the CeO in the embodiment of the present invention one with Ce Base Metal organic backbone as presoma2The X-ray of catalyst is spread out
Penetrate figure (XRD)；
Fig. 2 is the CeO in the embodiment of the present invention one with Ce Base Metal organic backbone as presoma2The N of catalyst2Absorption-de-
Accompanying drawing；
Fig. 3 is the CeO in the embodiment of the present invention one with Ce Base Metal organic backbone as presoma2The SEM figure of catalyst；
Fig. 4 be in the embodiment of the present invention one different sintering temperatures be obtained with Ce Base Metal organic backbone as presoma
CeO2Catalyst is to CO oxidation activity with catalytic temperature change curve.
Specific embodiment
With reference to embodiments with accompanying drawing to the present invention CeO with Ce Base Metal organic backbone as presoma2Catalyst
And preparation method thereof and preventing and treating environmental pollution in application be further described.
【Embodiment one】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, comprises the following steps：
Step one, 1.26g trimesic acid and 4.34g six nitric hydrate cerium are added to 60mlN, dinethylformamide
In, 25 DEG C of stirrings in water-bath, trimesic acid and six nitric hydrate ceriums are completely dissolved, to forming transparent mixed solution.
Step 2, mixed solution is transferred to the having in teflon-lined stainless steel cauldron of 100mL,
Under the conditions of 130 DEG C, crystallization 24h, obtains reactant.
Step 3, after being down to room temperature, is washed with DMF to reactant and is filtered, after filtering
Sample be transferred to 50 DEG C of vacuum drying oven drying 10h.
Step 4, the sample after drying is placed in Muffle furnace, with 500 DEG C of roastings 4 hours under oxygen atmosphere
Obtain the CeO that high performance Ce Base Metal organic framework material is presoma2Catalyst.
Fig. 1 is the CeO with Ce Base Metal organic backbone as presoma being obtained in the embodiment of the present invention one2The X of catalyst
X ray diffration pattern x (XRD).
As shown in figure 1, by the CeO analysing and comparing with Ce Base Metal organic backbone as presoma2The X-ray of catalyst is spread out
Penetrate figure (XRD), can obtain the angle of diffraction 28.550,33.084,47.487,56.347,59.096,69.424,76.707 and
79.087 characteristic peak.
Fig. 2 is the CeO with Ce Base Metal organic backbone as presoma being obtained in the embodiment of the present invention one2The N of catalyst2
Adsorption-desorption figure.
As shown in Fig. 2 passing through this N2Adsorption-desorption figure understands, obtained with Ce Base Metal organic backbone as presoma
CeO2The N of catalyst2Adsorption curve is III type isothermal line, and aperture is 5.2nm, and specific surface area is 621m2/g.
Fig. 3 is the CeO with Ce Base Metal organic backbone as presoma being obtained in the embodiment of the present invention one2Catalyst
SEM schemes.
As shown in figure 3, by the CeO with Ce Base Metal organic backbone as presoma obtained by embodiment one2Catalyst
Present block structure.
The CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2Catalyst carries out activity rating, lives
Property evaluation enter in fixed bed continuously flows differential reactor (the glass U-tube of internal diameter 4mm, loaded catalyst be 100mg)
OK.Unstripped gas forms：1%CO (volume ratio), 20%O2, 79%He, gas flow rate is 30ml/min, product after reaction 20min
CO in gas is through being furnished with gas chromatograph (GC-2060) on-line analyses of thermal conductivity cell detector.The conversion ratio of CO represents reaction
Activity.
Fig. 4 be in the embodiment of the present invention one different sintering temperatures be obtained with Ce Base Metal organic backbone as presoma
CeO2Catalyst is to CO oxidation activity with catalytic temperature change curve.
As shown in figure 4, under identical catalytic temperature, different sintering temperatures be obtained with Ce Base Metal organic backbone as forerunner
The CeO of body2Catalyst is different to CO oxidation activity, and sintering temperature is 500 DEG C of catalyst to CO catalysis activity highest.
Active testing shows, the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2Catalyst is being urged
Changing CO conversion ratio under the conditions of temperature is 330 DEG C is 100%, and after catalyst uses 48h, activity is constant.
【Embodiment two】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and changing the calcination atmosphere in step 4 is Ar.The present embodiment be obtained with Ce Base Metal organic backbone as presoma
CeO2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, it is organic with Ce Base Metal that the present embodiment is obtained
Skeleton is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 380 DEG C is 100%, and catalyst uses 48h
Active constant afterwards.
【Embodiment three】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and changing the calcination atmosphere in step 4 is N2.The present embodiment be obtained with Ce Base Metal organic backbone as presoma
CeO2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, it is organic with Ce Base Metal that the present embodiment is obtained
Skeleton is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 410 DEG C is 100%, and catalyst uses 48h
Active constant afterwards.
【Example IV】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and changing the calcination atmosphere in step 4 is He.The present embodiment be obtained with Ce Base Metal organic backbone as presoma
CeO2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, it is organic with Ce Base Metal that the present embodiment is obtained
Skeleton is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 390 DEG C is 100%, and catalyst uses 48h
Active constant afterwards.
【Embodiment five】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and the sintering temperature changing in step 4 is 400 DEG C.The present embodiment be obtained with Ce Base Metal organic backbone as presoma
CeO2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, what the present embodiment was obtained is had with Ce Base Metal
Machine skeleton is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 345 DEG C is 100%, and catalyst uses
After 48h, activity is constant.
【Embodiment six】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and the sintering temperature changing in step 4 is 600 DEG C.The present embodiment be obtained with Ce Base Metal organic framework material be front
Drive the CeO of body2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, the present embodiment be obtained with Ce fund
Belong to the CeO that organic backbone is presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 355 DEG C is 100%, and catalyst makes
Constant with activity after 48h.
【Embodiment seven】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and the sintering temperature changing in step 4 is 700 DEG C.The present embodiment be obtained with Ce Base Metal organic backbone as presoma
CeO2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, what the present embodiment was obtained is had with Ce Base Metal
Machine skeleton is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 370 DEG C is 100%, and catalyst uses
After 48h, activity is constant.
【Embodiment eight】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and changing the organic ligand in step one is p-phthalic acid.The present embodiment be obtained with Ce Base Metal organic backbone be
The CeO of presoma2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, the present embodiment be obtained with Ce base
Metallic organic framework is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 375 DEG C is 100%, catalyst
Constant using activity after 48h.
【Embodiment nine】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and changing the organic ligand in step one is oxalic acid.The present embodiment be obtained with Ce Base Metal organic backbone as presoma
CeO2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, what the present embodiment was obtained is had with Ce Base Metal
Machine skeleton is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 330 DEG C is 100%, and catalyst uses
After 48h, activity is constant.
【Embodiment ten】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and changing the organic ligand in step one is succinic acid.The present embodiment be obtained with Ce Base Metal organic backbone as forerunner
The CeO of body2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, the present embodiment be obtained with Ce Base Metal
Organic backbone is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 335 DEG C is 100%, and catalyst uses
After 48h, activity is constant.
【Embodiment 11】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, changes cerium source and solvent, six nitric hydrate ceriums is replaced with cerous acetate, DMF replaces with deionization
Water.The CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2The evaluation methodology of catalyst and embodiment one phase
With active testing shows, the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2Catalyst is in catalysis temperature
Spending for CO conversion ratio under the conditions of 340 DEG C is 100%, and after catalyst uses 48h, activity is constant.
【Embodiment 12】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, changes cerium source, six nitric hydrate ceriums are replaced with cerous nitrate ammonia.The present embodiment be obtained with Ce Base Metal organic backbone
CeO for presoma2The evaluation methodology of catalyst is identical with embodiment one, and active testing shows, the present embodiment be obtained with Ce
Base Metal organic backbone is the CeO of presoma2Catalyst CO conversion ratio under the conditions of catalytic temperature is 335 DEG C is 100%, catalysis
After agent uses 48h, activity is constant.
【Embodiment 13】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2The evaluation methodology of catalyst and enforcement
Example one is identical, and unstripped gas composition is changed into：1%CO (volume ratio), 20%O2, 79%Ar, gas flow rate is 50ml/min.This enforcement
The CeO with Ce Base Metal organic backbone as presoma that example is obtained2Catalyst CO conversion ratio under the conditions of catalytic temperature is 335 DEG C
For 100%, after catalyst uses 48h, activity is constant.
【Embodiment 14】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2The evaluation methodology of catalyst and enforcement
Example one is identical, and unstripped gas composition is changed into：1%CO (volume ratio), 10%O2, 89%N2, gas flow rate is 50ml/min.This enforcement
The CeO with Ce Base Metal organic backbone as presoma that example is obtained2Catalyst CO conversion ratio under the conditions of catalytic temperature is 340 DEG C
For 100%, after catalyst uses 48h, activity is constant.
【Embodiment 15】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, changes solvent, DMF is replaced with N,N-dimethylacetamide.The present embodiment be obtained with Ce body
CeO2The evaluation methodology of catalyst is identical with embodiment one, and unstripped gas composition is changed into：1%CO (volume ratio), 0.5%O2,
98.5%He, gas flow rate is 50ml/min.Active testing shows, the present embodiment be obtained with Ce Base Metal organic backbone be front
Drive the CeO of body2Catalyst CO conversion ratio under the conditions of catalytic temperature is 330 DEG C is 100%, and catalyst is using activity after 48h not
Become.Base Metal organic backbone is forerunner
【Embodiment 16】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, and material furnace drying method is replaced with lyophilization, and material is first put into pre-freeze extremely -80 in the freeze dryer of freezer dryer
After DEG C, evacuation is dried.The CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2The evaluation of catalyst
Method is identical with embodiment one, and unstripped gas composition is changed into：1%CO (volume ratio), 0.5%O2, 98.5%He, gas flow rate is
50ml/min.Active testing shows, the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2Catalyst exists
Under the conditions of catalytic temperature is 330 DEG C, CO conversion ratio is 100%, and after catalyst uses 48h, activity is constant.
【Embodiment 17】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2The evaluation methodology of catalyst and embodiment
One is identical, and unstripped gas composition is changed into：1%CO (volume ratio), 1%O2, 98%H2, gas flow rate is 30ml/min.Active testing table
Bright, the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2Catalyst CO when catalytic temperature is 300 DEG C
Conversion ratio is maintained at more than 50%.
【Embodiment 18】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2The evaluation methodology of catalyst and embodiment
One is identical.It is applied to volatile organic contaminant oxidation of formaldehyde, unstripped gas composition is changed into：500ppm formaldehyde, 20%O2, He put down
Weighing apparatus, gas flow rate is 30ml/min.Active testing shows, the present embodiment be obtained with Ce Base Metal organic backbone as presoma
CeO2Catalyst formaldehyde when catalytic temperature is 120 DEG C is completely eliminated.
【Embodiment 19】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2The evaluation methodology of catalyst and embodiment
One is identical.It is applied to volatile organic contaminant toluene oxidation, unstripped gas composition is changed into：500ppm toluene, 20%O2, He put down
Weighing apparatus, gas flow rate is 30ml/min.Active testing shows, the present embodiment be obtained with Ce Base Metal organic backbone as presoma
CeO2Catalyst toluene when catalytic temperature is 150 DEG C is completely eliminated.
【Embodiment 20】
A kind of CeO with Ce Base Metal organic backbone as presoma2The preparation method of catalyst, preparation method and embodiment
One is identical, the CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2The evaluation methodology of catalyst and embodiment
One is identical.It is applied to the NO_x elimination containing sulfur dioxide atmosphere, unstripped gas composition is changed into：1000ppm NO,
1000ppmC3H6, 250ppm SO2, 10%O2, 10%H2O, He balance, and gas flow rate is 100ml/min.Active testing shows,
The CeO with Ce Base Metal organic backbone as presoma that the present embodiment is obtained2Catalyst N when catalytic temperature is 180 DEG C2Absorb
Rate can reach more than 50%.
The CeO with Ce Base Metal organic backbone as presoma that embodiment one to embodiment 20 is obtained2Catalyst enters
Row activity rating the results are shown in Table 1.
The CeO with Ce Base Metal organic backbone as presoma for the table 12The catalytic performance of catalyst
Embodiment effect and effect
Embodiment one to embodiment 20 provides a kind of CeO with Ce Base Metal organic backbone as presoma2Catalyst,
Its preparation method and the application in preventing and treating environmental pollution, the preparation method of embodiment one to embodiment 20 be by cerium source with have
It is dissolved in solvent after the mixing of machine part, stir to after be completely dissolved and obtain mixed liquor, then mixed liquor is placed in reactor, one
Obtain reactant after determining under reaction temperature reaction a period of time, reactant carried out wash, filter, be dried after obtain Ce Base Metal
Organic framework material, will obtain the CeO with Ce Base Metal organic backbone as presoma after this material calcination2Catalyst.
This preparation method is simple, easy to operate it is adaptable to industrialized production, adopt that this preparation method is obtained with Ce Base Metal
Organic backbone is the CeO of presoma2Catalyst performance stabilised, can be used in CO catalytic oxidation and eliminates volatility organic contamination
Thing, the nitrogen oxides containing sulfur dioxide atmosphere.
Above example is only the basic explanation under present inventive concept, does not limit the invention.And according to the present invention
Any equivalent transformation of being made of technical scheme, belong to protection scope of the present invention.
Claims (9)
1. a kind of CeO with Ce Base Metal organic backbone as presoma2Catalyst is it is characterised in that the aperture of described catalyst is
1～5nm, specific surface area is 20～120m2/ g, including：
Organic ligand and be supported on Ce elements on described organic ligand,
Wherein, in described Ce Base Metal organic backbone, described Ce elements are 1.3 with the mol ratio of described organic ligand:1～
1.7:1,
Described Ce elements weight content in the catalyst is 10%～25%, and described organic ligand is in the catalyst
Weight content be 10%～23%.
2. Ce Base Metal organic backbone according to claim 1 is the CeO of presoma2Catalyst it is characterised in that:
Described organic ligand is selected from any one in trimesic acid, p-phthalic acid, oxalic acid and succinic acid.
3. a kind of Ce Base Metal organic backbone as claimed in claim 1 or 2 is the CeO of presoma2The preparation method of catalyst,
It is characterized in that, comprise the following steps：
Step one, weighs cerium source and described organic ligand by a certain percentage, is stirred at room temperature and so that it is dissolved completely in solvent,
Obtain mixed liquor；
Step 2, the described mixed liquor obtaining in step one is transferred to teflon-lined stainless steel cauldron
In, react 2～24 hours under certain reaction temperature, obtain reactant；
Step 3, the described reactant that step 2 is obtained washs, filters, is dried, and obtains Ce Base Metal organic framework material；
Step 4, by the described Ce Base Metal organic framework material obtaining in step 3 under certain sintering temperature and calcination atmosphere
Calcining, obtains the CeO with described Ce Base Metal organic backbone as presoma2Catalyst.
4. the CeO with Ce Base Metal organic backbone as presoma according to claim 32The preparation method of catalyst, it is special
Levy and be：
In step one, described solvent is DMF；Described cerium source is cerous nitrate or cerous nitrate ammonia.
5. the CeO with Ce Base Metal organic backbone as presoma according to claim 32The preparation method of catalyst, it is special
Levy and be：
In step one, described organic ligand, described cerium source, the mol ratio of described solvent are 1:0.59～0.77:0.0271～
0.043.
6. the CeO with Ce Base Metal organic backbone as presoma according to claim 32The preparation method of catalyst, it is special
Levy and be：
In step 2, described reaction temperature is 100～200 DEG C.
7. the CeO with Ce Base Metal organic backbone as presoma according to claim 32The preparation method of catalyst, it is special
Levy and be：
In step 3, the method for described drying is vacuum and heating drying or vacuum lyophilization, described vacuum and heating drying
Temperature is 50～80 DEG C, and the time is 5～24 hours；The temperature of described vacuum lyophilization is -80～-20 DEG C, and the time is 5～24
Hour.
8. the CeO with Ce Base Metal organic backbone as presoma according to claim 32The preparation method of catalyst, it is special
Levy and be：
In step 4, described sintering temperature is 400～700 DEG C, and described calcination atmosphere is CO, O2、H2、N2, appoint in He and Ar
Meaning one kind or its gaseous mixture, the time is 1～6 hour.
9. a kind of Ce Base Metal organic backbone as claimed in claim 1 is the CeO of presoma2Catalyst is in preventing and treating environmental pollution
In application.
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