CN113522274B - Alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and preparation method thereof - Google Patents
Alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and preparation method thereof Download PDFInfo
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- CN113522274B CN113522274B CN202110901325.7A CN202110901325A CN113522274B CN 113522274 B CN113522274 B CN 113522274B CN 202110901325 A CN202110901325 A CN 202110901325A CN 113522274 B CN113522274 B CN 113522274B
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- 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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- 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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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The invention relates to the technical field of flue gas denitration catalyst preparation, in particular to an alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and a preparation method thereof, comprising a preparation method of the low-temperature manganese-based SCR denitration catalyst, a preparation method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and a pretreatment method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst, wherein the catalyst prepared by the preparation method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst has the performance of efficiently catalyzing and reducing NOx in an application environment with low temperature and a certain amount of supported potassium salt or sodium salt as main characteristics, thereby adapting to high-alkali metal content fuel, achieving the purposes of prolonging the service life of the catalyst and improving the use safety and being prepared by SO (sulfur oxide) 2 The atmosphere pretreatment can improve the conversion rate of nitrogen oxides, is beneficial to the flue gas denitrification and environmental protection, has the performances of alkali metal poisoning resistance and sulfur dioxide poisoning resistance at the conversion rate of more than 80% at 150 ℃, and is beneficial to prolonging the service life of the catalyst.
Description
Technical Field
The invention relates to the technical field of preparation of flue gas denitration catalysts, in particular to an alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and a preparation method thereof.
Background
Although the new increment of coal consumption in the power industry and the total amount of coal consumption in the non-electric industry are strictly controlled in China, the coal is still the main energy source in China at the present stage, and the pollution degree of NOx discharged into the atmosphere by a fixed source and a mobile source is continuously increased due to the continuous increase of the garbage incineration treatment capacity and the rapid increase of the holding capacity of motor vehicles. Therefore, how to effectively eliminate NOx is an important issue of current environmental protection.
The selective catalytic reduction (selective catalytic reduction, SCR) is currently the most widely used and effective flue gas denitration technique internationally. However, conventional vanadium-based catalysts, i.e. in the form of TiO 2 For the carrier, a certain amount of V is loaded 2 O 5 、WO 3 Or MoO 3 The medium-high temperature catalyst of the components has higher activity temperature (300-400 ℃) and is generally arranged at high temperature and high dust. The technology has some problems in practical use, namely fly ash and SO in the flue gas 2 The catalyst is easy to be blocked and poisoned due to high content, so that the activity of the catalyst is reduced and the service life of the catalyst is shortened; secondly, the vanadium precursor has high toxicity and causes great harm to human bodies, animals, plants and the environment. Therefore, the reduction of vanadium loading or the replacement of vanadium with other metal elements is of great significance in preparing novel efficient and environment-friendly catalysts. MnO compared to vanadium-based catalysts x The catalyst has the advantages of low temperature, high efficiency, no toxicity, low cost and the like, and can reduce the activation temperature of the catalyst to about 150 ℃, so that the denitration device is moved backwards, and when the catalyst is used in a household garbage incineration power plant, flue gas does not need to be reheated to more than 180 ℃ through a steam flue gas heat exchanger SGH, thereby reducing the steam consumption for heating and improving the generating capacity and the overall benefit of the whole plant.
Alkali metals are the most toxic elements to the catalyst, their toxicityThe strength of the property is proportional to the basicity of the metal. For coal-fired boilers, since most of alkali metals in the coal ash are insoluble, the possibility of alkali metal poisoning is small, and for oil-fired boilers, since the content of water-soluble alkali metal salt is high, the risk of poisoning is high, and particularly for boilers burning high-sodium eastern coal and biomass for combustion, since the content of water-soluble Na and K in the fuel is high, the alkali metal poisoning phenomenon is serious. For garbage incineration power generation, since kitchen garbage still occupies a large proportion at present and kitchen garbage contains high salt, finally alkali metal oxide or salt enters an SCR denitration area along with fly ash, a catalyst pore canal can be blocked, physical passivation is caused, active sites are occupied, and NH is caused 3 The reduction of the adsorption amount causes chemical poisoning deactivation. Therefore, development of a low-temperature manganese-based denitration catalyst having alkali metal poisoning resistance has been desired.
For NH 3 SCR denitration reaction, NH 3 Adsorption on the catalyst surface is the first step in the SCR reaction, so SCR performance is closely related to catalyst surface acidity. By SO 2 The pretreatment can improve the acidity of the catalyst surface, thereby improving the NH of the catalyst surface 3 The adsorption capacity of (2) counteracts the poisoning effect of alkali metal K, na on the catalyst. Therefore, there is an increasing demand for an alkali metal poisoning resistant low temperature manganese-based SCR denitration catalyst and a method for preparing the same.
Most catalysts existing in the market at present are used for converting and eliminating NOx in boiler flue gas, but are difficult to adapt to fuels with high alkali metal content, alkali metal poisoning is easy to cause, so that the catalytic efficiency is reduced, and the catalyst prepared by the prior art cannot simultaneously meet the performances of alkali metal poisoning resistance and sulfur dioxide poisoning resistance, so that the low-temperature manganese-based SCR denitration catalyst for resisting alkali metal poisoning and the preparation method thereof are provided for solving the problems.
Disclosure of Invention
The invention aims to provide an alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and a preparation method thereof, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and a preparation method thereof, wherein the preparation method of the low-temperature manganese-based SCR denitration catalyst, the preparation method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and the pretreatment method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst comprise the following steps:
a1, dissolving manganese salt, ethanol and acetic acid in deionized water with the mass of 0.2-0.4 times in a constant-temperature water bath, stirring and impregnating to form an active component impregnating solution, wherein the mass of the manganese salt is 10% of the mass of the active component impregnating solution, the ethanol content is 20-50%, the acetic acid content is 5-30%, and the balance is deionized water;
a2, placing the ethyl titanate and the active component impregnating solution prepared in the step A1 into an ultrasonic cleaner for ultrasonic impregnation for 2-5 hours, and then placing the ultrasonic cleaner into a constant-temperature water bath kettle for heating at 50-80 ℃ to evaporate water to obtain a filter cake;
a3, drying the filter cake in a drying oven at 105 ℃ for 10-12 hours, then putting the filter cake into a muffle furnace, heating to the constant temperature of 500-600 ℃ at 5-10 ℃/min, and calcining for 5-7 hours to obtain the low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 The low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 The mass percentage of the manganese element loaded in the method is 3-6%.
Preferably, the preparation method of the alkali metal poisoning low-temperature manganese-based SCR denitration catalyst comprises the following steps:
b1, the low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 Soaking in an equal volume of potassium nitrate or sodium nitrate solution, stirring uniformly, and standing for 12-24 hours to obtain a soaking solution, wherein the equal volume of potassium nitrate or sodium nitrate solution is equal to the total volume of the active component soaking solution and ethyl titanate;
b2, placing the impregnating solution in a baking oven, drying at 105 ℃ for 10-12 hours, placing in a muffle furnace, heating to constant temperature of 500-600 ℃ at 5-10 ℃/min, and calcining for 5-7 hours to obtain the alkali metal poisoning low-temperature manganese-based SCR denitration catalyst K/Na-MnO x /TiO 2 The alkali metalK/Na loaded in poisoned low temperature manganese based catalysts: mn molar ratio is 1:10-3:10.
Preferably, the pretreatment method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst comprises the step of adding MnO to the low-temperature manganese-based SCR denitration catalyst x /TiO 2 And the alkali metal poisoning low-temperature manganese-based SCR denitration catalyst K/Na-MnO x /TiO 2 Respectively placing in quartz tube at 100-400deg.C, at 400-800ppm SO 2 Pretreating for 4-8 hours in atmosphere to obtain a pretreated alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst SO 2 -MnO x /TiO 2 And SO 2 -K/Na-MnO x /TiO 2 。
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, the catalyst prepared by the preparation method of the alkali metal poisoning low-temperature manganese-based SCR denitration catalyst has the performance of efficiently catalyzing and reducing NOx in an application environment with low temperature and a certain amount of supported potassium salt or sodium salt as main characteristics, thereby being suitable for fuels with high alkali metal content and achieving the purposes of prolonging the service life of the catalyst and improving the use safety.
2. In the present invention, SO is used for 2 The atmosphere pretreatment can improve the conversion rate of nitrogen oxides, is beneficial to the flue gas denitrification and environmental protection, has the performances of alkali metal poisoning resistance and sulfur dioxide poisoning resistance at the conversion rate of more than 80% at 150 ℃, and is beneficial to prolonging the service life of the catalyst.
Drawings
FIG. 1 is a graph comparing denitration performance of the catalyst of the present invention.
In the figure: the abscissa indicates the reaction temperature, and the ordinate indicates the nitrogen oxide conversion rate.
Detailed Description
Example 1:
referring to fig. 1, the present invention provides a technical solution:
an alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and a preparation method thereof, wherein the preparation method of the low-temperature manganese-based SCR denitration catalyst, the preparation method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst and the pretreatment method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst comprise the following steps:
a1, dissolving manganese chloride, ethanol and acetic acid in deionized water with the mass being 0.3 times of that of a constant-temperature water bath kettle, stirring and impregnating to form an active component impregnating solution, wherein the mass of manganese salt is 10% of that of the active component impregnating solution, the content of ethanol is 35%, the content of acetic acid is 15%, and the balance is deionized water;
a2, placing the ethyl titanate and the active component impregnating solution prepared in the step A1 into an ultrasonic cleaner for ultrasonic impregnation for 2-5 hours, then placing the ultrasonic cleaner into a constant-temperature water bath kettle for heating at 65 ℃, and evaporating water to obtain a filter cake;
a3, drying the filter cake in a drying oven at 105 ℃ for 11 hours, then placing the filter cake in a muffle furnace, heating to a constant temperature of 550 ℃ at 8 ℃/min, and calcining for 6 hours to obtain the low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 The low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 The mass percentage of the manganese element loaded in the method is 5%.
The preparation method of the alkali metal poisoning low-temperature manganese-based SCR denitration catalyst comprises the following steps:
b1, the low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 Soaking in an equal volume of potassium nitrate solution, uniformly stirring, and standing for 18 hours to obtain a soaking solution, wherein the equal volume of potassium nitrate solution is equal to the total volume of the active component soaking solution and ethyl titanate;
b2, placing the impregnating solution in a baking oven, drying at 105 ℃ for 11 hours, placing in a muffle furnace, heating to a constant temperature of 550 ℃ at 8 ℃/min, and calcining for 6 hours to obtain the alkali metal poisoning low-temperature manganese-based SCR denitration catalyst K/Na-MnO x /TiO 2 K supported in the alkali metal poisoned low temperature manganese based catalyst: the Mn molar ratio was 3:10.
The catalyst prepared by the preparation method of the low-temperature manganese-based SCR denitration catalyst with alkali metal poisoning has the performance of efficiently catalyzing and reducing NOx in an application environment with a certain amount of potassium salt or sodium salt as main characteristics at low temperature, so that the catalyst is suitable for fuels with high alkali metal content, and the purposes of prolonging the service life of the catalyst and improving the use safety are achieved;
the pretreatment method of the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst comprises the step of carrying out K/Na-MnO on the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst x /TiO 2 Placing in a 250 ℃ quartz tube at 600ppm SO 2 Pretreating for 6 hours in atmosphere to obtain a pretreated alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst SO 2 -K-MnO x /TiO 2 By SO 2 The atmosphere pretreatment can improve the conversion rate of nitrogen oxides, is beneficial to the flue gas denitration to protect the environment, has the performances of alkali metal poisoning resistance and sulfur dioxide poisoning resistance at the conversion rate of more than 80% at 150 ℃, and is beneficial to prolonging the service life of the catalyst;
the experimental procedure is as follows: catalyst with NH 3 600ppm of NO and 600ppm of NH are taken as reducing agents 3 、5％O 2 Mixing, and the rest reaction mixture is N 2 The loading of the catalyst was 500mg and the reaction space velocity was 100000h -1 MnO obtained in example 1 was reacted at 100-300 ℃ x /TiO 2 、SO 2 -MnO x /TiO 2 And SO 2 -K/Na-MnO x /TiO 2 The denitration performance of the three catalysts is compared, and the result is shown in figure 1.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. The foregoing is merely illustrative of the preferred embodiments of this invention, and it is noted that there is objectively no limit to the specific structure disclosed herein, since numerous modifications, adaptations and variations can be made by those skilled in the art without departing from the principles of the invention, and the above-described features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the inventive concepts and aspects to other applications without modification, are contemplated as falling within the scope of the present invention.
Claims (2)
1. A preparation method of an alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst is characterized by comprising the following steps of: the preparation method of the low-temperature manganese-based SCR denitration catalyst comprises the following steps:
a1, dissolving manganese salt, ethanol and acetic acid in deionized water with the mass of 0.2-0.4 times in a constant-temperature water bath, stirring and impregnating to form an active component impregnating solution, wherein the mass of the manganese salt is 10% of the mass of the active component impregnating solution, the ethanol content is 20-50%, the acetic acid content is 5-30%, and the balance is deionized water;
a2, placing the ethyl titanate and the active component impregnating solution prepared in the step A1 into an ultrasonic cleaner for ultrasonic impregnation for 2-5 hours, and then placing the ultrasonic cleaner into a constant-temperature water bath kettle for heating at 50-80 ℃ to evaporate water to obtain a filter cake;
a3, drying the filter cake in a drying oven at 105 ℃ for 10-12 hours, then putting the filter cake into a muffle furnace, heating to the constant temperature of 500-600 ℃ at 5-10 ℃/min, and calcining for 5-7 hours to obtain the low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 The low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 The mass percentage of the manganese element loaded in the method is 3-6%;
a4, preparing the low-temperature manganese-based SCR denitration catalyst MnO x /TiO 2 Soaking in an equal volume of potassium nitrate or sodium nitrate solution, stirring uniformly, and standing for 12-24 hours to obtain a soaking solution, wherein the equal volume of potassium nitrate or sodium nitrate solution is equal to the total volume of the active component soaking solution and ethyl titanate;
a5, placing the impregnating solution in an oven, drying at 105 ℃ for 10-12 hours, placing in a muffle furnace, heating to constant temperature of 500-600 ℃ at 5-10 ℃/min, and calcining for 5-7 hours to obtain the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst K/Na-MnO x /TiO 2 K/Na supported in the alkali metal poisoning resistant low temperature manganese-based catalyst: mn molar ratio is 1:10-3:10.
2. The method for preparing the alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst according to claim 1, which is characterized by comprising the following steps: pretreatment method of alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst comprises the step of resisting alkaliMetal poisoning low-temperature manganese-based SCR denitration catalyst K/Na-MnO x /TiO 2 Placing in a quartz tube at 100-400deg.C, at 400-800ppm SO 2 Pretreating for 4-8 hours in atmosphere to obtain a pretreated alkali metal poisoning resistant low-temperature manganese-based SCR denitration catalyst SO 2 -K/Na-MnO x /TiO 2 。
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1817448A (en) * | 2006-03-09 | 2006-08-16 | 浙江大学 | Selective catalytic reducing NOx catalyst based on MnOx/TiO2 system at low-temperature and production thereof |
| CN102319560A (en) * | 2011-05-27 | 2012-01-18 | 东南大学 | Preparation method of manganese titanium catalysts |
| CN103240081A (en) * | 2013-05-01 | 2013-08-14 | 北京工业大学 | Manganese-based low-temperature denitration catalyst taking TiO2-SiO2 as carrier and preparation method thereof |
| CN103381362A (en) * | 2013-07-22 | 2013-11-06 | 哈尔滨工业大学 | Low-temperature manganese-based denitration catalyst and preparing method thereof |
| CN104941658A (en) * | 2015-05-26 | 2015-09-30 | 大连理工大学 | Low-temperature SCR anti-poisoning catalyst suitable for cement kiln and preparation method of low-temperature SCR anti-poisoning catalyst |
| CN105618031A (en) * | 2016-01-05 | 2016-06-01 | 武汉理工大学 | Nanorod-like low-temperature denitration catalyst and preparation method thereof |
| CN105727936A (en) * | 2016-02-03 | 2016-07-06 | 甘肃天朗化工科技有限公司 | Low-temperature sulfur-resistant denitration catalyst and preparation method thereof |
| CN108380204A (en) * | 2018-03-06 | 2018-08-10 | 常州大学 | A kind of preparation of Mn bases attapulgite catalyst and characterization |
| CN110052264A (en) * | 2019-05-21 | 2019-07-26 | 中国石油化工股份有限公司 | A kind of preparation method for SCR denitration under cryogenic conditions |
| CN112023908A (en) * | 2020-08-04 | 2020-12-04 | 华北电力大学 | Nitrogen oxide removing catalyst and preparation method thereof |
-
2021
- 2021-08-06 CN CN202110901325.7A patent/CN113522274B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1817448A (en) * | 2006-03-09 | 2006-08-16 | 浙江大学 | Selective catalytic reducing NOx catalyst based on MnOx/TiO2 system at low-temperature and production thereof |
| CN102319560A (en) * | 2011-05-27 | 2012-01-18 | 东南大学 | Preparation method of manganese titanium catalysts |
| CN103240081A (en) * | 2013-05-01 | 2013-08-14 | 北京工业大学 | Manganese-based low-temperature denitration catalyst taking TiO2-SiO2 as carrier and preparation method thereof |
| CN103381362A (en) * | 2013-07-22 | 2013-11-06 | 哈尔滨工业大学 | Low-temperature manganese-based denitration catalyst and preparing method thereof |
| CN104941658A (en) * | 2015-05-26 | 2015-09-30 | 大连理工大学 | Low-temperature SCR anti-poisoning catalyst suitable for cement kiln and preparation method of low-temperature SCR anti-poisoning catalyst |
| CN105618031A (en) * | 2016-01-05 | 2016-06-01 | 武汉理工大学 | Nanorod-like low-temperature denitration catalyst and preparation method thereof |
| CN105727936A (en) * | 2016-02-03 | 2016-07-06 | 甘肃天朗化工科技有限公司 | Low-temperature sulfur-resistant denitration catalyst and preparation method thereof |
| CN108380204A (en) * | 2018-03-06 | 2018-08-10 | 常州大学 | A kind of preparation of Mn bases attapulgite catalyst and characterization |
| CN110052264A (en) * | 2019-05-21 | 2019-07-26 | 中国石油化工股份有限公司 | A kind of preparation method for SCR denitration under cryogenic conditions |
| CN112023908A (en) * | 2020-08-04 | 2020-12-04 | 华北电力大学 | Nitrogen oxide removing catalyst and preparation method thereof |
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