CN110721673A - Mn-Ce/Al2O3Cordierite low-temperature denitration catalyst and preparation method thereof - Google Patents
Mn-Ce/Al2O3Cordierite low-temperature denitration catalyst and preparation method thereof Download PDFInfo
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
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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
- B01D53/8621—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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- B01D2258/0283—Flue gases
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- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Abstract
The invention discloses Mn-Ce/Al2O3The preparation method of the cordierite low-temperature denitration catalyst comprises the following steps: preparing an impregnation liquid containing aluminum, manganese and cerium: under the condition of water bath, mixing aluminum nitrate nonahydrate, cerium nitrate hexahydrate and a manganese nitrate solution with the mass ratio of 50%, dissolving the mixed solution in deionized water, adding excessive urea, and continuously adding the deionized water until the volume of an impregnation solution meets the impregnation requirement; dipping: adding cordierite into the prepared impregnation liquid for soaking; drying and roasting: and taking out the impregnated cordierite, placing the cordierite in an oven for drying, and roasting the product in a temperature programming muffle furnace after the drying is finished. The invention also discloses a Mn-Ce/Al2O 3/cordierite low-temperature denitration catalyst. The denitration catalyst of the inventionThe preparation method of the catalyst can enable the active components to be better dispersed on the coating and improve the performance of the catalyst.
Description
Technical Field
The invention belongs to the technical field of denitration catalysts, and particularly relates to Mn-Ce/Al2O3A cordierite low-temperature denitration catalyst and a preparation method thereof.
Background
Nitrogen oxides (NOx) resulting from the combustion of fossil fuels are a significant cause of environmental problems such as acid rain, photochemical pollution, haze effects, and the like. The Selective Catalytic Reduction (SCR) technology is the most effective and widely applied technology in the prior fixed source denitration. In coal-fired power plants, commercial vanadium-titanium SCR catalysts currently used are located between economizers and air preheaters, are in a high-dust environment, and are susceptible to wear and poisoning by alkali metals SO2 and the like in flue gas. If the SCR catalyst is placed in a low-dust and low-SO 2 environment after dust removal and desulfurization, the service life of the SCR catalyst can be effectively prolonged. However, since the temperature of the desulfurized flue gas is below 200 ℃, the flue gas needs to be heated to meet the active temperature window of the vanadium-based SCR catalyst, which greatly increases the operating cost. It is of great value to study SCR catalysts with high catalytic activity at low temperatures.
For industrial production, the monolithic catalyst is more favorable for reducing pressure drop and increasing wear resistance, and is favorable for practical application. Monolithic SCR catalysts are typically composed of a substrate support, a coating, and an active component. Cordierite, which has good mechanical properties, thermal stability and very low thermal expansion, is widely used as a substrate support for monolithic SCR catalysts. However, cordierite has a small specific surface area, and it is possible to increase the specific surface area and sufficiently disperse the active component on the surface by coating a coating layer on the surface of cordierite. The common coatings mainly comprise Al2O3, TiO2, SiO2, molecular sieves, activated carbon and the like. Among the many supports, Al2O3 has excellent mechanical characteristics and desirable pore structure characteristics and is a good coating material.
The impregnation method is the most common method for loading active components in the preparation of monolithic catalysts. However, after the carrier is impregnated with the precursor solution of the active component, the solvent is evaporated and the active component is redistributed in the drying process, which may cause uneven distribution of the active component, which is not favorable for forming a monolithic catalyst with high loading and high dispersity. The deposition precipitation method obtains a uniform metal layer by forming an insoluble metal salt on a support, which does not move during drying. When the Mn-Ce/Al2O 3/cordierite catalyst is prepared by adopting a traditional deposition precipitation method, an alumina coating is firstly coated on the surface of cordierite, and then a manganese-cerium active component is loaded, but because the alumina coating is loaded firstly, the dispersity of the alumina coating on the cordierite is not high, the loading capacity of the manganese-cerium active material loaded on a carrier is not ideal. In addition, the existing deposition precipitation method has few researches in the field of preparation of integral denitration catalysts, and the corresponding researches have wide prospects.
Disclosure of Invention
In response to the above-identified deficiencies in or needs for improvement in the art, the present invention provides a Mn-Ce/Al alloy2O3A low-temperature cordierite denitration catalyst is improved on the basis of a traditional precipitation method, and is characterized in that aluminum nitrate, cerous nitrate hexahydrate and manganese nitrate solution are mixed firstly, so that the loading process of an alumina coating and an active component is carried out synchronously, the interaction between the active component and the alumina coating is enhanced, and the active component is enabled to be capable of being used as a catalystCan be better dispersed on the coating, thereby improving the catalytic performance of the catalyst.
In order to achieve the above object, the present invention provides a Mn-Ce/Al alloy2O3The preparation method of the cordierite low-temperature denitration catalyst comprises the following steps:
s1 preparation of an impregnation solution containing aluminum, manganese and cerium: under the condition of water bath, mixing aluminum nitrate nonahydrate, cerium nitrate hexahydrate and a manganese nitrate solution with the mass ratio of 50%, dissolving the mixed solution in deionized water, adding excessive urea (the excessive urea is the amount which is more than or equal to the amount of hydroxide formed by all the aluminum nitrate, the cerium nitrate hexahydrate and the manganese nitrate), and continuously adding the deionized water until the volume of the impregnation liquid meets the impregnation requirement;
wherein, the amounts of the aluminum nitrate, the cerous nitrate hexahydrate and the manganese nitrate solution are selected according to the required molar ratio of aluminum, manganese and cerium;
s2 dipping: adding cordierite into the prepared impregnation liquid for soaking;
s3 drying and roasting: and taking out the impregnated cordierite, placing the cordierite in an oven for drying, and roasting the product in a temperature programming muffle furnace after the drying is finished.
Further, in step S1, the molar ratio of aluminum, manganese and cerium satisfies (10-20): (5-10): (2-4).
Further, in step S1, the water bath temperature is set to 40 to 60 ℃.
Further, in step S2, the immersion time is 4 to 8 hours.
Further, in step S3, the drying temperature in the oven is selected to be 100 to 110 ℃.
Further, in step S3, the drying time in the oven is 12 to 24 hours.
Further, in step S3, the temperature of baking in the muffle furnace is 450 to 550 ℃.
Further, in step S3, the time for baking in the muffle furnace is 6 to 10 hours.
As another aspect of the present invention, there is provided Mn-Ce/Al2O3Corydalis Decumbens (lour.) MerrThe low-temperature denitration catalyst comprises a base carrier of cordierite, and alumina and active component loads are formed on the cordierite simultaneously.
Further, the molar ratio of aluminum to manganese to cerium is (10-20): (5-10): (2-4).
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) Mn-Ce/Al of the invention2O3The preparation method of the cordierite low-temperature denitration catalyst is improved on the basis of a traditional precipitation method, and comprises the steps of firstly mixing aluminum nitrate, cerous nitrate hexahydrate and manganese nitrate solution, so that the loading process of an alumina coating and an active component is synchronously carried out, the interaction between the active component and the alumina coating is enhanced, the active component can be better dispersed on the coating, and the catalytic performance of the catalyst is improved.
(2) Mn-Ce/Al of the invention2O3The catalyst prepared by the preparation method of the catalyst has good performance in a simulated flue gas test, and when the temperature is 190-290 ℃ and the airspeed is 10000-20000 h < -1 >, the denitration efficiency is over 80 percent and can reach over 90 percent at most.
(3) Invention Mn-Ce/Al2O3Compared with powdery or granular manganese-cerium catalysts, the monolithic catalyst disclosed by the invention is more favorable for reducing pressure drop and increasing wear resistance, and is favorable for practical application.
Drawings
FIG. 1 is a graph showing the activity of NH3 in selective catalytic reduction of NO in a modified precipitation method-based Mn-Ce/Al2O 3/cordierite low-temperature denitration catalyst obtained in example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Mn-Ce/Al of the invention2O3The preparation of the cordierite low-temperature denitration catalyst is prepared based on a deposition precipitation method, but is improved on the basis of the existing deposition precipitation method, the traditional precipitation method for preparing the denitration catalyst is to coat an alumina film on the surface of cordierite firstly, the preparation of the deposition precipitation is changed, the alumina coating and the active component loading process are synchronously carried out, the alumina film is not coated on the surface of the cordierite in advance, and the alumina coating and the active component loading process are synchronously carried out, so that the interaction between the active component and the alumina coating is enhanced, the active component is better dispersed on the coating, and the performance of the catalyst is improved.
Example 1
Preparing a steeping fluid: accurately weighing 150.05g of aluminum nitrate nonahydrate, 26.05g of cerium nitrate hexahydrate and 71.58g of a 50% manganese nitrate solution by mass under the condition of water bath, dissolving the weighed materials in 80ml of deionized water to form a solution, adding 80g of urea, and continuously adding the deionized water to ensure that the volume of the solution is 200 ml; in the impregnation liquid prepared by the scheme, nitric acid containing aluminum and nitric acid containing active components of manganese and cerium are mixed together, so that a material basis is provided for the synchronous formation of an aluminum oxide coating and the loading process of the active components, and urea is added for reaction to generate a hydroxide intermediate;
wherein the temperature of the water bath is preferably 50 ℃.
Dipping: adding cordierite into the prepared impregnation liquid, and soaking for 6 h.
Drying and roasting: and taking out the impregnated cordierite, drying the impregnated cordierite in an oven at 105 ℃ for 16h, and roasting the dried product in a temperature programming muffle furnace at 500 ℃ for 8h, wherein an alumina coating is formed on the surface of the cordierite in the drying and roasting processes, and the loading of the active component is finished at the same time, and the active component and the alumina coating interact in the process, so that the active component is better dispersed on the coating.
The denitration catalyst prepared by the method has the catalyst denitration activity experiment result shown in figure 1, the denitration efficiency of the catalyst is 91.83% at about 220 ℃, and the denitration efficiency reaches over 80% in the temperature range of 190-290 ℃.
Example 2
Preparing a steeping fluid: 75.02g of aluminum nitrate nonahydrate, 17.36g of cerium nitrate hexahydrate and 35.79g of 50% manganese nitrate solution are accurately weighed under the condition of water bath, dissolved in 80ml of deionized water to form a solution, 80g of urea is added, and the deionized water is further added to make the volume of the solution be 200ml, wherein the temperature of the water bath is preferably 40 ℃.
Dipping: cordierite was added to the impregnation solution prepared above, and impregnated for 4 hours.
Drying and roasting: the impregnated cordierite is taken out and placed in an oven at 100 ℃ for drying for 12 hours, and then the product is roasted for 6 hours at 450 ℃ in a temperature programming muffle furnace.
Through the catalyst activity test, the denitration efficiency of the catalyst in a temperature range of 210-265 ℃ reaches more than 80%.
Example 3
Preparing a steeping fluid: 112.54g of aluminum nitrate nonahydrate, 34.73g of cerous nitrate hexahydrate and 57.26g of a 50% manganese nitrate solution are accurately weighed under the condition of a 60 ℃ water bath, dissolved in 80ml of deionized water to form a solution, 80g of urea is added, and the deionized water is continuously added to make the volume of the solution be 200ml, wherein the water bath temperature is preferably 60 ℃.
Dipping: adding cordierite into the prepared impregnation liquid, and impregnating for 8 h.
Drying and roasting: the impregnated cordierite is taken out and placed in an oven at 110 ℃ for drying for 24h, and then the product is roasted at 550 ℃ in a temperature programming muffle furnace for 10 h.
Through the catalyst activity test, the denitration efficiency of the catalyst in the temperature range of 200-270 ℃ reaches more than 80%.
The activity test of the active catalyst adopts a catalytic device to test the catalyst, and the smoke components adopted in the test are as follows:
the concentration of NOx in the flue gas is 800ppm, and the ratio of NOx/NH3 is 1: 1;
the concentration of O2 is 5 percent;
n2 is a balance gas;
the flow rate of the mixed gas was 1000 ml/min.
As another aspect of the present invention, a Mn-Ce/Al alloy is obtained by the above-mentioned method2O3The base carrier of the cordierite low-temperature denitration catalyst is cordierite, wherein, the alumina and the active component load are formed on the cordierite simultaneously, so the dispersibility of the active component on the coating is better, and the catalytic performance of the catalyst is also better;
wherein the coating is aluminum oxide, the active components are manganese and cerium, and the molar ratio of the aluminum to the manganese to the cerium in the catalyst is (10-20): (5-10): (2-4).
Further, the catalyst has an active temperature range of 300 ℃ or less.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. Mn-Ce/Al2O3The preparation method of the cordierite low-temperature denitration catalyst is characterized by comprising the following steps:
s1 preparation of an impregnation solution containing aluminum, manganese and cerium: under the condition of water bath, mixing aluminum nitrate nonahydrate, cerium nitrate hexahydrate and a manganese nitrate solution with the mass ratio of 50%, dissolving the mixed solution in deionized water, adding excessive urea, and continuously adding the deionized water until the volume of an impregnation solution meets the impregnation requirement;
wherein, the amounts of the aluminum nitrate, the cerous nitrate hexahydrate and the manganese nitrate solution are selected according to the required molar ratio of aluminum, manganese and cerium;
s2 dipping: adding cordierite into the prepared impregnation liquid for soaking;
s3 drying and roasting: and taking out the impregnated cordierite, placing the cordierite in an oven for drying, and roasting the product in a temperature programming muffle furnace after the drying is finished.
2. A Mn-Ce/Al according to claim 12O3The preparation method of the cordierite low-temperature denitration catalyst is characterized in that in the step S1, the molar ratio of aluminum, manganese and cerium satisfies (10-20): (5-10): (2-4).
3. A Mn-Ce/Al according to claim 1 or 22O3The method for preparing the cordierite low-temperature denitration catalyst is characterized in that in step S1, the water bath temperature is set to be 40-60 ℃.
4. A Mn-Ce/Al according to claim 12O3The preparation method of the cordierite low-temperature denitration catalyst is characterized in that in the step S2, the impregnation time is 4-8 h.
5. A Mn-Ce/Al according to claim 12O3The preparation method of the cordierite low-temperature denitration catalyst is characterized in that in step S3, the drying temperature in an oven is selected to be 100-110 ℃.
6. A Mn-Ce/Al according to claim 1 or 52O3The preparation method of the cordierite low-temperature denitration catalyst is characterized in that in step S3, the drying time in an oven is 12-24 hours.
7. A Mn-Ce/Al according to claim 1 or 52O3The preparation method of the cordierite low-temperature denitration catalyst is characterized in that in step S3, the roasting temperature in a muffle furnace is 450-550 ℃.
8. A Mn-Ce/Al according to claim 1 or 72O3Method for preparing cordierite low-temperature denitration catalystThe preparation method is characterized in that in the step S3, the roasting time in a muffle furnace is 6-10 h.
9. A Mn-Ce/Al alloy as claimed in any one of claims 1 to 82O3The catalyst is characterized in that a basic carrier of the catalyst is cordierite, and alumina and active component loads are simultaneously formed on the cordierite.
10. A Mn-Ce/Al according to claim 92O3The cordierite low-temperature denitration catalyst comprises the following components in a molar ratio of aluminum, manganese and cerium (10-20): (5-10): (2-4).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530453A (en) * | 2020-04-30 | 2020-08-14 | 山东理工大学 | Ce-Mn composite catalyst for low-temperature SCR denitration reaction and preparation method thereof |
| CN112439409A (en) * | 2020-11-27 | 2021-03-05 | 西安理工大学 | Hydrolysis catalyst for blast furnace gas desulfurization and preparation method thereof |
| CN113522304A (en) * | 2021-08-04 | 2021-10-22 | 安徽科浦环保科技有限公司 | Preparation method of wide-temperature selective trapping reduction denitration material |
| CN113908842A (en) * | 2021-10-19 | 2022-01-11 | 石河子大学 | Denitration catalyst for CO-SCR flue gas denitration and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0377643A (en) * | 1989-08-21 | 1991-04-03 | Matsushita Electric Ind Co Ltd | Catalyst for purification of exhaust gas |
| US20030175192A1 (en) * | 2001-01-26 | 2003-09-18 | Engelhard Corporation | SOx trap for enhancing NOx trap performance and methods of making and using the same |
| CN103611563A (en) * | 2013-12-10 | 2014-03-05 | 柳景惠 | SCR (Selective Catalytic Reduction) catalyst and preparation method thereof |
| CN106238057A (en) * | 2016-07-12 | 2016-12-21 | 上海纳米技术及应用国家工程研究中心有限公司 | A kind of low-temperature SCR catalyst and its preparation method and application |
| CN107185523A (en) * | 2017-06-15 | 2017-09-22 | 华中科技大学 | Preparation method of denitrating catalyst that a kind of holmium is modified and products thereof |
| CN107855002A (en) * | 2017-11-28 | 2018-03-30 | 石河子大学 | A kind of method and its device of honeycomb fashion low-temperature denitration |
| CN108079777A (en) * | 2017-11-28 | 2018-05-29 | 石河子大学 | A kind of coal-fired plant flue gas low-temperature denitration method and its device |
-
2019
- 2019-09-12 CN CN201910864893.7A patent/CN110721673A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0377643A (en) * | 1989-08-21 | 1991-04-03 | Matsushita Electric Ind Co Ltd | Catalyst for purification of exhaust gas |
| US20030175192A1 (en) * | 2001-01-26 | 2003-09-18 | Engelhard Corporation | SOx trap for enhancing NOx trap performance and methods of making and using the same |
| CN103611563A (en) * | 2013-12-10 | 2014-03-05 | 柳景惠 | SCR (Selective Catalytic Reduction) catalyst and preparation method thereof |
| CN106238057A (en) * | 2016-07-12 | 2016-12-21 | 上海纳米技术及应用国家工程研究中心有限公司 | A kind of low-temperature SCR catalyst and its preparation method and application |
| CN107185523A (en) * | 2017-06-15 | 2017-09-22 | 华中科技大学 | Preparation method of denitrating catalyst that a kind of holmium is modified and products thereof |
| CN107855002A (en) * | 2017-11-28 | 2018-03-30 | 石河子大学 | A kind of method and its device of honeycomb fashion low-temperature denitration |
| CN108079777A (en) * | 2017-11-28 | 2018-05-29 | 石河子大学 | A kind of coal-fired plant flue gas low-temperature denitration method and its device |
Non-Patent Citations (1)
| Title |
|---|
| XIN LI ET AL.: ""Enhancement of SCR performance of monolithic Mn-Ce/Al2O3/cordierite catalysts by using modified deposition precipitation method"", 《ASIA-PAC J CHEM ENG》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530453A (en) * | 2020-04-30 | 2020-08-14 | 山东理工大学 | Ce-Mn composite catalyst for low-temperature SCR denitration reaction and preparation method thereof |
| CN112439409A (en) * | 2020-11-27 | 2021-03-05 | 西安理工大学 | Hydrolysis catalyst for blast furnace gas desulfurization and preparation method thereof |
| CN113522304A (en) * | 2021-08-04 | 2021-10-22 | 安徽科浦环保科技有限公司 | Preparation method of wide-temperature selective trapping reduction denitration material |
| CN113908842A (en) * | 2021-10-19 | 2022-01-11 | 石河子大学 | Denitration catalyst for CO-SCR flue gas denitration and preparation method thereof |
| CN113908842B (en) * | 2021-10-19 | 2024-04-16 | 石河子大学 | Denitration catalyst for CO-SCR flue gas denitration and preparation method thereof |
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