CN113441167A - Cobalt oxide nanorod NO oxidation catalyst and preparation method and application thereof - Google Patents
Cobalt oxide nanorod NO oxidation catalyst and preparation method and application thereof Download PDFInfo
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 76
- 230000003647 oxidation Effects 0.000 title claims abstract description 74
- 229910000428 cobalt oxide Inorganic materials 0.000 title claims abstract description 47
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000002073 nanorod Substances 0.000 title claims abstract description 42
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- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims abstract description 17
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- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 3
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/041—Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41
- B01J29/042—Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41 containing iron group metals, noble metals or copper
- B01J29/044—Iron group metals or copper
-
- 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
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
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- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
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Abstract
The invention provides a cobalt oxide nanorod NO oxidation catalyst, and a preparation method and application thereof, wherein the preparation method comprises the following steps: s1, dispersing the molecular sieve and the cobalt nitrate in a solvent, uniformly stirring, drying a product, and then performing first high-temperature calcination to obtain composite powder; s2, dispersing the composite powder in a cobalt nitrate solution, uniformly stirring, drying a product, and then carrying out secondary high-temperature calcination; and S3, washing the product after the second high-temperature calcination by using hot alkali liquor, washing to be neutral, performing suction filtration and drying, and performing third high-temperature calcination to obtain the cobalt oxide nanorod NO oxidation catalyst. The invention adopts a hard template method to prepare the cobalt oxide which is the active component of catalytic oxidation into a nanorod shape, can expose more active sites compared with nano-particle cobalt oxide or common cobalt oxide, and can improve the NO catalytic oxidation activity under normal temperature and pressure.
Description
Technical Field
The invention relates to the technical field of flue gas catalytic denitration, and particularly relates to a cobalt oxide nanorod NO oxidation catalyst and a preparation method and application thereof.
Background
Nitrogen oxides are typical atmospheric pollutants and are in various types, including NO and NO2、N2O3And the like, the demand of industrial development on fossil fuels is greatly increased, the emission of nitrogen oxides is increasingly increased, great harm is brought to human health and ecological environment, and the strengthening of the prevention and control of nitrogen oxide pollution is an important subject to be solved urgently in the air pollution control engineering.
The nitrogen oxides in the industrial flue gas are generated by NO and NO2In the form of initially emitted NOxThe NO accounts for about 95 percent, but the NO is difficult to dissolve in water, so that the wet absorption treatment mode can be used for the NOxThe removal effect of (a) is not significant. For the conventional industrial flue gas, the denitration technology mainly comprises various types such as a reduction method (SCR and SNCR), a liquid absorption method adsorption method, an electron beam irradiation method and the like, and two typical technologies of SCR (selective catalytic reduction) and SNCR (selective non-catalytic reduction) are popularized and applied in engineering practice and are respectively applied to flue gas denitration of a coal-fired power plant and flue gas denitration of a cement kiln.However, at present, catalysts used for catalytic denitration by reduction of ammonia gas or CO have the defect of being easily influenced by sulfur dioxide, oxygen, water vapor and other components in flue gas, so that the catalytic reduction denitration efficiency is reduced, and therefore, the significance of finding a catalyst which is not influenced by other components in flue gas is great. In recent years, the catalytic oxidation of NO (SCO) technology has attracted attention, and the NO in flue gas is converted into NO which is easily dissolved in water and can react with water by using a catalyst2Then absorbing with alkali liquor, and the technology can combine with the traditional wet desulphurization technology to realize SO2With NOxAnd (4) performing synergistic purification treatment.
At present, research is mainly devoted at home and abroad on the catalytic oxidation of NO by using supported catalysts such as activated carbon, molecular sieves, noble metals, transition metals and the like, wherein the noble metal catalysts and the transition metal catalysts have higher activity. In the prior art, a noble metal Pt-based catalyst has higher NO catalytic oxidation activity, but the preparation cost of the noble metal catalyst is obviously higher, so the industrial application and popularization of the noble metal catalyst are limited. The activated carbon also has certain NO catalytic oxidation efficiency, but the industrial application of the activated carbon is limited by the defects of NO high temperature resistance, unstable chemical properties and the like. The molecular sieve and the transition metal catalyst have stable properties, high temperature resistance and cheap and easily available raw materials, and are the key points of research on NO catalytic oxidation in recent years.
Disclosure of Invention
In view of the above, the invention aims to overcome the defects of the prior art, and provides a cobalt oxide nanorod NO oxidation catalyst, and a preparation method and application thereof, so that the NOx removal rate is improved, and the catalyst has good sulfur resistance and water resistance, and is more beneficial to the application of actual industrial conditions.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a preparation method of a cobalt oxide nanorod NO oxidation catalyst comprises the following steps:
s1, dispersing the molecular sieve and the cobalt nitrate in a solvent, uniformly stirring, drying a product, and then performing first high-temperature calcination to obtain composite powder;
s2, dispersing the composite powder in a cobalt nitrate solution, uniformly stirring, drying a product, and then carrying out secondary high-temperature calcination;
and S3, washing the product after the second high-temperature calcination by using hot alkali liquor, washing to be neutral, performing suction filtration and drying, and performing third high-temperature calcination to obtain the cobalt oxide nanorod NO oxidation catalyst.
Optionally, in the above technical scheme, the molar ratio of the molecular sieve to the cobalt nitrate in step S1 is 1:50 to 1: 300.
Optionally, in the above technical solution, the solvent in step S1 includes one or more of deionized water, methanol and ethanol.
Optionally, in the above technical solution, the concentration of the cobalt nitrate solution in step S2 is 0.5-3 mol/L.
Optionally, in the above technical solution, the hot alkali solution in step S3 includes one or more of a NaOH solution and a KOH solution.
Optionally, in the above technical scheme, the concentration of the hot alkali solution is 1-3mol/L, and the temperature is 30-80 ℃.
Optionally, in the above technical solution, the calcination temperature of the first high-temperature calcination, the second high-temperature calcination and the third high-temperature calcination is 400-.
The second purpose of the invention is to provide a cobalt oxide nanorod NO oxidation catalyst, which is prepared by adopting the preparation method of the cobalt oxide nanorod NO oxidation catalyst.
Optionally, in the above technical solution, the cobalt oxide nanorods have a diameter of 1-10nm and a BET specific surface area of 50-300m2/g。
The third purpose of the invention is to provide the application of the cobalt oxide nanorod NO oxidation catalyst in selective catalytic oxidation denitration, wherein the cobalt oxide nanorod catalyst is used for NO oxidation, and O is utilized2Is oxidized with NO to convert it into NO2Absorbing with alkali solution for reuse.
Compared with the prior art, the cobalt oxide nanorod NO oxidation catalyst provided by the invention and the preparation method and application thereof have the following advantages:
(1) the invention utilizes the active metal Co of NO oxidation reaction as the active site to play the catalytic role, utilizes the hard template method to prepare the cobalt oxide which is the active component of catalytic oxidation into the shape of a nano rod, can expose more active sites compared with nano-particle cobalt oxide or common cobalt oxide, improves the NO catalytic oxidation activity under normal temperature and normal pressure, and ensures that the product has good removal rate of nitrogen oxide and special effects of sulfur resistance and water resistance which are not possessed by common metal oxide.
(2) The preparation method provided by the invention has the advantages of simple process and good conversion effect, can be applied to the efficient purification treatment of NO pollutants in factory flue gas, and has important social significance and practical application value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below to the drawings required for the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic flow chart of a preparation method of a cobalt oxide nanorod NO oxidation catalyst according to an embodiment of the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, a method for preparing a cobalt oxide nanorod NO oxidation catalyst comprises the following steps:
s1, mixing molecular sieve SBA-15 and cobalt nitrate Co (NO)3)2·6H2Dispersing O in solvent, stirring, drying, calcining at high temperatureSintering to obtain composite powder;
s2, dispersing the composite powder in a cobalt nitrate solution, uniformly stirring, drying the product, and then carrying out secondary high-temperature calcination;
and S3, washing the product after the second high-temperature calcination by using hot alkali liquor, washing to be neutral, performing suction filtration and drying, and performing third high-temperature calcination to obtain the cobalt oxide nanorod NO oxidation catalyst.
The invention utilizes the active metal Co of NO oxidation reaction as the active site to play the catalytic role, utilizes the hard template method to prepare the cobalt oxide which is the active component of catalytic oxidation into the shape of a nano rod, can expose more active sites compared with nano-particle cobalt oxide or common cobalt oxide, improves the NO catalytic oxidation activity under normal temperature and normal pressure, ensures that the product has good removal rate of nitrogen oxide and special effects of sulfur resistance and water resistance which are not possessed by common metal oxide,
specifically, in step S1, the solvent is one or more of deionized water, methanol, and ethanol. The molar ratio of the molecular sieve to the cobalt nitrate is 1:50-1: 300. The mol ratio of the solute (the molecular sieve and the cobalt nitrate) to the solvent is 1:100-1:500, and the stirring time of the molecular sieve and the cobalt nitrate is 1-4 h.
In step S2, the composite powder is dispersed in cobalt nitrate solution, and the mixture is stirred for 1-4h, wherein the concentration of the cobalt nitrate solution is 0.5-3 mol/L.
In step S3, the hot alkali solution comprises one or more of NaOH solution and KOH solution, the concentration of the hot alkali solution is 1-3mol/L, and the temperature is 30-70 ℃.
And (3) washing and circulating the product after the second high-temperature calcination for 3-5 times by using hot alkali liquor, washing the product to be neutral, filtering and separating, drying the solid product at 50-80 ℃ for 12-18h, and then carrying out third high-temperature calcination to obtain the cobalt oxide nanorod NO oxidation catalyst.
Wherein the calcination temperature of the first high-temperature calcination, the second high-temperature calcination and the third high-temperature calcination is 400-700 ℃, the heating rate is 1-5 ℃/min, and the calcination time is 0.5-6 h.
The preparation method provided by the invention has the advantages of simple process and good conversion effect, can be applied to the efficient purification treatment of NO pollutants in factory flue gas, and has important social significance and practical application value.
The invention also provides a cobalt oxide nanorod NO oxidation catalyst, which is prepared by the preparation method of the cobalt oxide nanorod NO oxidation catalyst.
Wherein the cobalt oxide nanorod has the diameter of 1-10nm and the BET specific surface area of 50-300m2/g。
The catalyst provided by the invention adopts a hard template method to prepare the cobalt oxide with catalytic oxidation active component into a nanorod shape, can expose more active sites compared with nano-particle cobalt oxide or common cobalt oxide, and can improve the NO catalytic oxidation activity at normal temperature and normal pressure.
The invention also provides an application of the cobalt oxide nanorod NO oxidation catalyst in NO catalytic oxidation.
Compared with the prior art for removing the nitrogen oxide by the wet method, the invention does not need to add reducing substances or other gas components (ammonia and alkanes), fully utilizes the oxygen in the flue gas, and effectively removes the nitrogen oxide through catalytic oxidation. In addition, the oxidized high-valence nitrogen oxide can well react with subsequent alkali liquor, and the obtained nitrite product can also be used as a preservative and an antifreezing agent, so that the aim of sustainable development of treating wastes with wastes is fulfilled, and the recycling and the effectiveness of waste treatment are realized.
The method is suitable for treating the industrial flue gas containing the nitrogen oxide, and the industrial flue gas is subjected to steam and SO2The adverse effect of impurity components is small, the concentration range of NOx treatment is wide, the original tail gas emission system does not need to be greatly modified in practical application, the operation is simple, the control is easy, the method accords with the actual national conditions of China, the popularization and the use are easy, and the application value is high.
On the basis of the above embodiment, the present invention provides the following specific examples of the preparation method and the application of the cobalt oxide nanorod NO oxidation catalyst, and further illustrates the present invention. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are examples of experimental procedures not specified under specific conditions, generally according to the conditions recommended by the manufacturer. Unless otherwise indicated, percentages and parts are by mass.
Example 1
The embodiment provides a preparation method of a cobalt oxide nanorod NO oxidation catalyst, which comprises the following steps:
1) 1g of SBA-15 was dispersed in 5mL of 0.8M Co (NO)3)2·6H2O in ethanol, and stirring vigorously at room temperature for at least 4 hours. Then drying overnight at 60 ℃, calcining at 200 ℃ in static air at the heating rate of 1 ℃/min, and keeping for 4 hours to obtain composite powder;
2) the composite powder was again impregnated with 5mL of 0.8M Co (NO) in the same manner as in the first impregnation process3)2·6H2Soaking the mixture once in an ethanol solution of O, drying the mixture overnight at 60 ℃, calcining the mixture for 6 hours at 550 ℃, and raising the temperature at the rate of 1 ℃/min;
3) washing with 80 deg.C 2M NaOH hot solution for at least three times to remove SBA-15 template, washing the solid product with deionized water until neutralization, vacuum filtering, oven drying at 60 deg.C overnight, and maintaining at 300 deg.C in flowing nitrogen for 1h to obtain Co3O4Nanorod NO oxidation catalyst # 1.
Example 2
The embodiment provides a preparation method of a cobalt oxide nanorod NO oxidation catalyst, which comprises the following steps:
1) 1g of SBA-15 was dispersed in 5mL of 1.6M Co (NO)3)2·6H2O in ethanol, and stirring vigorously at room temperature for at least 4 hours. Then drying overnight at 60 ℃, calcining at 200 ℃ in static air at the heating rate of 1 ℃/min, and keeping for 4 hours to obtain composite powder;
2) the composite powder was again impregnated with 5mL of 1.6M Co (NO) in the same manner as in the first impregnation process3)2·6H2Soaking the mixture once in an ethanol solution of O, drying the mixture overnight at 60 ℃, calcining the mixture for 6 hours at 550 ℃, and raising the temperature at the rate of 1 ℃/min;
3) washing with hot solution of 2M NaOH at 80 deg.C for at least three times to remove SBA-15 template, and removing solid productWashing with ionized water until neutralization, vacuum filtering, oven drying at 60 deg.C overnight, and maintaining at 300 deg.C for 1h in flowing nitrogen to obtain Co3O4Nanorod NO oxidation catalyst # 2.
Example 3
The embodiment provides a preparation method of a cobalt oxide nanorod NO oxidation catalyst, which comprises the following steps:
1) 1g of SBA-15 was dispersed in 5mL of 2.4M Co (NO)3)2·6H2O in ethanol, and stirring vigorously at room temperature for at least 4 hours. Then drying overnight at 60 ℃, calcining at 200 ℃ in static air at the heating rate of 1 ℃/min, and keeping for 4 hours to obtain composite powder;
2) the composite powder was again impregnated with 5mL of 2.4M Co (NO) in the same manner as in the first impregnation process3)2·6H2Soaking the mixture once in an ethanol solution of O, drying the mixture overnight at 60 ℃, calcining the mixture for 6 hours at 550 ℃, and raising the temperature at the rate of 1 ℃/min;
3) washing with 80 deg.C 2M NaOH hot solution for at least three times to remove SBA-15 template, washing the solid product with deionized water until neutralization, vacuum filtering, oven drying at 60 deg.C overnight, and maintaining at 300 deg.C in flowing nitrogen for 1h to obtain Co3O4Nanorod NO oxidation catalyst # 3.
Test example 1
And (3) activity test: using an atmospheric fixed bed reactor test, 0.05g of dry catalysts #1 and #2(40-60 mesh) were placed in the center of the reactor with the reaction gas consisting of 500ppm NO, 10% O2，N2Balance, total flow rate set to 300mL min-1. The reaction gas enters the reactor and is continuously measured by a flue gas analyzer.
The NO catalytic oxidation conversion rate of the #1 catalyst at 150 ℃ was 30%, the NO catalytic oxidation conversion rate of the #2 catalyst was 42%, and the NO catalytic oxidation conversion rate of the #3 catalyst was 37%, respectively.
The NO catalytic oxidation conversion rate of the #1 catalyst is 60 percent, the NO catalytic oxidation conversion rate of the #2 catalyst is 66 percent and the NO catalytic oxidation conversion rate of the #3 catalyst is 63 percent at 200 ℃.
The NO catalytic oxidation conversion rate of the #1 catalyst is 78%, the NO catalytic oxidation conversion rate of the #2 catalyst is 82% and the NO catalytic oxidation conversion rate of the #3 catalyst is 80% at 250 ℃.
Test example 2
And (3) water resistance test: using an atmospheric fixed bed reactor test, 0.05g of dry catalysts #1 and #2(40-60 mesh) were placed in the center of the reactor with the reaction gas consisting of 500ppm NO, 10% O2，10％H2O，N2Balance, total flow rate set to 300mL min-1. The reaction gas enters the reactor and is continuously measured by a flue gas analyzer.
The NO catalytic oxidation conversion of the #1 catalyst was measured to be 27%, the NO catalytic oxidation conversion of the #2 catalyst was measured to be 38%, and the NO catalytic oxidation conversion of the #3 catalyst was measured to be 34% at 150 ℃.
The NO catalytic oxidation conversion rate of the #1 catalyst is 56%, the NO catalytic oxidation conversion rate of the #2 catalyst is 62% and the NO catalytic oxidation conversion rate of the #3 catalyst is 60% at 200 ℃.
The NO catalytic oxidation conversion rate of the #1 catalyst is 75 percent, the NO catalytic oxidation conversion rate of the #2 catalyst is 79 percent, and the NO catalytic oxidation conversion rate of the #3 catalyst is 78 percent at 250 ℃.
Test example 3
And (3) sulfur resistance test: using an atmospheric fixed bed reactor test, 0.05g of dry catalysts #1 and #2(40-60 mesh) were placed in the center of the reactor with the reaction gas consisting of 500ppm NO, 10% O2，200ppm SO2，N2Balance, total flow rate set to 300mL min-1. The reaction gas enters the reactor and is continuously measured by a flue gas analyzer.
The catalytic oxidation conversion rate of NO of the #1 catalyst at 150 ℃ was 25%, the catalytic oxidation conversion rate of NO of the #2 catalyst was 35%, and the catalytic oxidation conversion rate of NO of the #3 catalyst was 33%, respectively.
The NO catalytic oxidation conversion rate of the #1 catalyst is 52 percent, the NO catalytic oxidation conversion rate of the #2 catalyst is 60 percent, and the NO catalytic oxidation conversion rate of the #3 catalyst is 58 percent at 200 ℃.
The NO catalytic oxidation conversion rate of the #1 catalyst is 70 percent, the NO catalytic oxidation conversion rate of the #2 catalyst is 75 percent, and the NO catalytic oxidation conversion rate of the #3 catalyst is 74 percent at 250 ℃.
The combination of the above test results shows that: the cobalt oxide nanorod NO oxidation catalyst prepared by the invention has high NOx removal rate and good sulfur-resistant and water-resistant performances under the condition of simulating industrial waste gas at 250 ℃, does not need to greatly modify the original tail gas emission system in practical application, is simple to operate, easy to control, and easy to popularize and use, and has high application value.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The preparation method of the cobalt oxide nanorod NO oxidation catalyst is characterized by comprising the following steps of:
s1, dispersing the molecular sieve and the cobalt nitrate in a solvent, uniformly stirring, drying a product, and then performing first high-temperature calcination to obtain composite powder;
s2, dispersing the composite powder in a cobalt nitrate solution, uniformly stirring, drying a product, and then carrying out secondary high-temperature calcination;
and S3, washing the product after the second high-temperature calcination by using hot alkali liquor, washing to be neutral, performing suction filtration and drying, and performing third high-temperature calcination to obtain the cobalt oxide nanorod NO oxidation catalyst.
2. The method of claim 1, wherein the molar ratio of the molecular sieve to the cobalt nitrate in step S1 is 1:50 to 1: 300.
3. The method of claim 2, wherein the solvent of step S1 includes one or more of deionized water, methanol, and ethanol.
4. The method according to claim 1, wherein the concentration of the cobalt nitrate solution in step S2 is 0.5-3 mol/L.
5. The method as claimed in claim 4, wherein the hot alkali solution of step S3 includes one or more of NaOH solution and KOH solution.
6. The preparation method according to claim 4, characterized in that the concentration of the hot lye is 1-3mol/L and the temperature is 30-70 ℃.
7. The preparation method according to any one of claims 1 to 6, wherein the calcination temperature of the first high-temperature calcination, the second high-temperature calcination and the third high-temperature calcination is 400-700 ℃, the temperature rise rate is 1-5 ℃/min, and the calcination time is 0.5-6 h.
8. A cobalt oxide nanorod NO oxidation catalyst, characterized by being prepared by the preparation method of the cobalt oxide nanorod NO oxidation catalyst of any one of claims 1-8.
9. The cobalt oxide nanorod NO oxidation catalyst of claim 8, wherein the cobalt oxide nanorods have a diameter of 1-10nm and a BET specific surface area of 50-300m2/g。
10. The use of the cobalt oxide nanorod NO oxidation catalyst as claimed in claim 8 or 9 for oxidation denitration, wherein the cobalt oxide nanorod catalyst is used for NO oxidation, and O is used2Is oxidized with NO to convert it into NO2Absorbing with alkali solution for reuse.
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| CN101306840A (en) * | 2008-06-13 | 2008-11-19 | 北京工业大学 | Process for synthesizing ordered mesoporous manganese oxide or cobalt oxide by hard template |
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| CN101306840A (en) * | 2008-06-13 | 2008-11-19 | 北京工业大学 | Process for synthesizing ordered mesoporous manganese oxide or cobalt oxide by hard template |
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