CN112169808A - Desulfurization and denitrification catalyst and preparation method thereof - Google Patents

Desulfurization and denitrification catalyst and preparation method thereof Download PDF

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Publication number
CN112169808A
CN112169808A CN201910591422.3A CN201910591422A CN112169808A CN 112169808 A CN112169808 A CN 112169808A CN 201910591422 A CN201910591422 A CN 201910591422A CN 112169808 A CN112169808 A CN 112169808A
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China
Prior art keywords
catalyst
active coke
desulfurization
soaking
nitrate
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CN201910591422.3A
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Chinese (zh)
Inventor
徐本刚
黄先亮
朱艳芳
蔡进
王金利
张�杰
吴学其
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China Petroleum and Chemical Corp
Research Institute of Sinopec Nanjing Chemical Industry Co Ltd
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China Petroleum and Chemical Corp
Research Institute of Sinopec Nanjing Chemical Industry Co Ltd
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Priority to CN201910591422.3A priority Critical patent/CN112169808A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/847—Vanadium, niobium or tantalum or polonium
    • B01J23/8472—Vanadium
    • 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
    • B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2523/00—Constitutive chemical elements of heterogeneous catalysts

Abstract

The invention belongs to the technical field of catalysts, and relates to a modified desulfurization and denitrification catalyst and a preparation method thereof. The catalyst is loaded on an active coke carrier by taking vanadium pentoxide as an active component and copper oxide, iron oxide, potassium oxide and cobalt oxide as modifiers, wherein the vanadium pentoxide is measured by mass percentage, and V2O51‑5%、CuO2‑5%、Fe3O42‑5%、K2O1-1.5%, CoO1-1.5%, and the balance active coke carrier. The modified catalyst can realize simultaneous desulfurization and denitrification in one furnace, the desulfurization efficiency reaches 100 percent, the denitrification efficiency reaches 85 percent, and the modified catalyst has the advantages of reducing equipment, saving space, reducing investment, stabilizing operation and the like.

Description

Desulfurization and denitrification catalyst and preparation method thereof
Technical Field
The invention belongs to the technical field of catalysts, and particularly relates to a modified desulfurization and denitrification catalyst and a preparation method thereof.
Background
Coal is one of the main energy sources for industrial development and is developed and utilized rapidly, and SO is contained in flue gas discharged by coal-fired boilers and thermal power plants2、NOxAnd dust and other harmful substances, which causes the environment to worsen and seriously threatens the ecological environment and public health.
Therefore, effective control and reduction of sulfur oxide and nitrogen oxide emissions has become a very urgent task at present.
The flue gas type pollution is a main pollution source of atmospheric pollution at present stage of China, and is particularly expressed as SO2And NOxAcid rain and photochemical smog are caused by the emission of (a). The smoke pollution can not only cause soil acidification, slow growth of animals and plants, water body acidification, building corrosion and the like, but also harm human health to a great extent, such as NOxThe harm to human body is shown in that NO is combined with hemoglobin in blood to cause methemoglobin leukemia and the like; SO in atmosphere2Has strong irritation to upper respiratory mucosa and conjunctiva, and is easy to cause diseases of respiratory organs, such as pneumonia and bronchitis.
SO2And NOxAt the same time in the discharged flue gas, SO2And NOxThe chemical properties are different, the difference of the removing mechanism is large, and if the removing method is adopted, the problems of large occupied area, more equipment, complex operation, poor economic benefit and the like are caused. Since both gases are acidic oxides, a simultaneous removal process can be designed.
At present, the integration of flue gas desulfurization and denitration mainly comprises several processes of wet desulfurization and denitration, dry desulfurization and denitration and semi-dry desulfurization and denitration. Wherein, the wet-method removal effect is better, but the problems of serious pollution of waste liquid after removal and the like exist; the dry removal has the defects of high operating equipment cost and the like; the semidry method has the advantages of the dry method and the wet method, but has the problems of unstable operation and the like.
The dry purification integrated desulfurization and denitrification technology realizes simultaneous desulfurization and denitrification processes on the same set of device, and has the advantages of less equipment, space saving, investment reduction, stable operation and the like.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to realize a dry purification integrated desulfurization and denitrification technology by modifying a prepared desulfurization and denitrification catalyst, and solve the problems of serious waste liquid pollution, high operating equipment cost, unstable operation and the like in the conventional desulfurization and denitrification processes.
The technical scheme is as follows: the purpose of the invention is realized by the following technical scheme.
The invention provides a modified desulfurization and denitrification catalyst, which takes active coke as a carrier and V2O5CuO and Fe are used as active components3O4、K2O, CoO is a modifier.
The catalyst component is calculated by mass percent, V2O51-5%、CuO2-5%、Fe3O42-5%、K2O1-1.5%, CoO1-1.5%, and the balance of carrier.
The specific surface area of the active coke carrier is 280-400 m2/g。
The active component V2O5Is prepared from ammonium metavanadate and modifier chosen from copper nitrate, iron nitrate, potassium nitrate and cobalt nitrate.
The invention also provides a preparation method of the catalyst, which comprises the following steps: firstly, soaking an active coke carrier in a nitric acid solution, filtering, washing to be neutral, and drying for later use; secondly, weighing ammonium metavanadate according to the mass percentage, and preparing a solution by the ammonium metavanadate and oxalic acid; soaking active coke carrier by an isovolumetric soaking method, drying, and N2Roasting under the protection condition to obtain V2O5Active coke is used; weighing copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate according to mass percentage, adding deionized water, heating and stirring until the mixture is completely dissolved; fourthly, the roasted V2O5Adding active coke into the solution, soaking in the same volume, drying, and roasting to obtain the catalyst.
Preferably, the catalyst preparation method of the present invention comprises the following steps:
(1) soaking the active coke carrier in a nitric acid solution with the concentration of 0.4mol/L for 3-5h, filtering and washing to be neutral, and drying in a 120 ℃ oven for 5-6h for later use;
(2) weighing ammonium metavanadate according to mass percent, weighing oxalic acid according to a molar ratio of 1:2, and preparing a solution; soaking active coke carrier by isovolumetric soaking method, oven drying at 120 deg.C for 5-6h, and muffle furnace N at 500 deg.C2Roasting for 5 hours under the protection condition to obtain V2O5Active coke is used;
(3) weighing copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate according to the mass percentage, adding deionized water, heating and stirring until the mixture is completely dissolved;
(4) the roasted V is2O5Adding active coke into the solution III, soaking for 6h in the same volume, drying in a 120 ℃ oven for 5-6h, and roasting in a 500 ℃ muffle furnace for 5-6h to obtain the catalyst.
The invention also provides an application of the catalyst, and the catalyst is used for desulfurization and denitrification reactions.
Preferably, the catalyst is activated for 2-3h at 500 ℃ before being used in desulfurization and denitrification reactions.
Preferably, the conditions of the catalyst for desulfurization and denitrification reaction are as follows: the reaction temperature is 280 plus 350 ℃ and the space velocity is 1000 plus 5000h-1The gas component is NO: 500-700ppm SO2:500-750ppm、NH3：600-800ppm、O2The total volume content is 8 percent, and the rest is N2The reaction is carried out at normal pressure.
The invention has the advantages of
(1) By adopting the catalyst, the removal rate of nitrogen oxide measured by the reaction at the flue gas outlet reaches more than 85 percent, and the removal rate of sulfur dioxide can reach 100 percent;
(2) by adopting the catalyst, the integrated desulfurization and denitrification technology of dry purification is realized, namely, the simultaneous desulfurization and denitrification process is realized on the same set of device, and the catalyst has the advantages of less equipment, space saving, investment reduction, stable operation and the like.
Detailed Description
The present invention will be further described with reference to specific embodiments.
Example 1
Weighing 50g of active coke, adding the active coke into 0.4mol/L dilute nitric acid, soaking for 3h, filtering, washing to be neutral, and drying for 5h in an oven at 120 ℃ to obtain the active coke for later use. Weighing 5.15g of ammonium metavanadate and 11.0g of oxalic acid, dissolving in deionized water to prepare a solution, heating until the ammonium metavanadate and the oxalic acid are completely dissolved, adding active coke for equal-volume impregnation, fully impregnating for 5 hours, drying in a 120 ℃ oven for 5 hours; placing in a muffle furnace at 500 ℃ and N2Roasting for 5 hours for standby under the atmosphere condition. Weighing 5.28g, 5.39g, 2.17g and 4.65g of copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate respectively, completely dissolving in deionized water, soaking the modified components in the same volume for 6 hours, baking in a 120 ℃ oven for 5 hours, placing in a muffle furnace, and roasting at 500 ℃ for 5 hours to obtain the desulfurization and denitrification catalyst.
Example 2
Weighing 50g of active coke, adding the active coke into 0.4mol/L dilute nitric acid, soaking for 3h, filtering, washing to be neutral, and drying for 5h in a muffle furnace at 120 ℃ to obtain the active coke for standby. Weighing 10.3g of ammonium metavanadate and 22.0g of oxalic acid, dissolving in deionized water to prepare a solution, heating until the ammonium metavanadate and the oxalic acid are completely dissolved, adding active coke for equal-volume impregnation, fully impregnating for 5 hours, drying in a 120 ℃ oven for 5 hours; placing in a muffle furnace at 500 ℃ and N2Roasting for 5 hours for standby under the atmosphere condition. Weighing 5.28g, 5.39g, 2.17g and 4.65g of copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate respectively, completely dissolving in deionized water, soaking the modified components in the same volume for 6 hours, baking in a 120 ℃ oven for 5 hours, placing in a muffle furnace, and roasting at 500 ℃ for 5 hours to obtain the desulfurization and denitrification catalyst.
Example 3
Weighing 50g of active coke, adding the active coke into 0.4mol/L dilute nitric acid, soaking for 3h, filtering, washing to be neutral, and drying for 5h in a muffle furnace at 120 ℃ to obtain the active coke for standby. Weighing 10.3g of ammonium metavanadate and 22.0g of oxalic acid, dissolving in deionized water to prepare a solution, heating until the ammonium metavanadate and the oxalic acid are completely dissolved, adding active coke for equal-volume impregnation, fully impregnating for 5 hours, drying in a 120 ℃ oven for 5 hours; placing in a muffle furnace at 500 ℃ and N2Roasting for 5 hours for standby under the atmosphere condition. Weighing 6.24g, 6.54g, 3.06g and 4.82g of copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate respectively, completely dissolving in deionized water, soaking the modified components in the same volume for 6 hours, baking in a 120 ℃ oven for 5 hours, placing in a muffle furnace, and roasting at 500 ℃ for 5 hours to obtain the desulfurization and denitrification catalyst.
Example 4
Weighing 50g of active coke, adding the active coke into 0.4mol/L dilute nitric acid, soaking for 5 hours, filtering, washing to be neutral, and drying for 5 hours in a muffle furnace at the temperature of 120 ℃ to obtain the active coke for standby. Weighing 10.3g of ammonium metavanadate and 22.0g of oxalic acid, dissolving in deionized water to prepare a solution, heating until the ammonium metavanadate and the oxalic acid are completely dissolved, adding active coke for equal-volume impregnation, fully impregnating for 5 hours, drying in a 120 ℃ oven for 5 hours; placing in a muffle furnace at 500 ℃ and N2Roasting for 5 hours for standby under the atmosphere condition. Weighing 8.64g, 8.74g, 4.22g and 6.04g of copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate respectively, completely dissolving in deionized water, soaking the modified components in the same volume for 6 hours, baking in a 120 ℃ oven for 5 hours, placing in a muffle furnace, and roasting at 500 ℃ for 5 hours to obtain the desulfurization and denitrification catalyst.
Example 5
Weighing 50g of active coke, adding the active coke into 0.4mol/L dilute nitric acid, soaking for 4 hours, filtering, washing to be neutral, and drying for 6 hours in a muffle furnace at the temperature of 120 ℃ to obtain the active coke for standby. Weighing 5.15g of ammonium metavanadate and 11.0g of oxalic acid, dissolving in deionized water to prepare a solution, heating until the ammonium metavanadate and the oxalic acid are completely dissolved, adding active coke for equal-volume impregnation, fully impregnating for 5 hours, drying in a 120 ℃ oven for 6 hours; placing in a muffle furnace at 500 ℃ and N2Roasting for 5 hours for standby under the atmosphere condition. Weighing 8.64g, 8.74g, 4.22g and 6.04g of copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate respectively, completely dissolving in deionized water, soaking the modified components in the same volume for 6 hours, baking in a 120 ℃ oven for 6 hours, placing in a muffle furnace, and roasting at 500 ℃ for 6 hours to obtain the desulfurization and denitrification catalyst.
Example 6
Weighing 50g of active coke, adding the active coke into 0.4mol/L dilute nitric acid, soaking for 5 hours, filtering, washing to be neutral, and drying for 5 hours in a muffle furnace at the temperature of 120 ℃ to obtain the active coke for later useSexual intercourse. Weighing 7.21g of ammonium metavanadate and 15.4g of oxalic acid, dissolving in deionized water to prepare a solution, heating until the ammonium metavanadate and the oxalic acid are completely dissolved, adding active coke for equal-volume impregnation, fully impregnating for 5 hours, drying in a 120 ℃ oven for 5 hours; placing in a muffle furnace at 500 ℃ and N2Roasting for 5 hours for standby under the atmosphere condition. Weighing 8.64g, 8.74g, 4.22g and 6.04g of copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate respectively, completely dissolving in deionized water, soaking the modified components in the same volume for 6 hours, baking in a 120 ℃ oven for 5 hours, placing in a muffle furnace, and roasting at 500 ℃ for 6 hours to obtain the desulfurization and denitrification catalyst.
Example 7
Weighing 50g of active coke, adding the active coke into 0.4mol/L dilute nitric acid, soaking for 5 hours, filtering, washing to be neutral, and drying for 5 hours in a muffle furnace at the temperature of 120 ℃ to obtain the active coke for standby. Weighing 7.21g of ammonium metavanadate and 15.4g of oxalic acid, dissolving in deionized water to prepare a solution, heating until the ammonium metavanadate and the oxalic acid are completely dissolved, adding active coke for equal-volume impregnation, fully impregnating for 5 hours, drying in a 120 ℃ oven for 5 hours; placing in a muffle furnace at 500 ℃ and N2Roasting for 5 hours for standby under the atmosphere condition. Weighing 5.28g, 5.39g, 2.17g and 4.65g of copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate respectively, completely dissolving in deionized water, soaking the modified components in the same volume for 6 hours, baking in a 120 ℃ oven for 5 hours, placing in a muffle furnace, and roasting at 500 ℃ for 6 hours to obtain the desulfurization and denitrification catalyst.
Example 8
The desulfurization and denitrification catalyst prepared in the example 1 is loaded on a fixed bed, the temperature of the bed layer is raised to 500 ℃, the catalyst is activated for 2 hours, then the temperature is lowered to 280 ℃, and flue gas is introduced, wherein the flue gas components are as follows: SO (SO)2 600ppm、NO 500ppm、NH3 600ppm、O2Volume is 8 percent, nitrogen is balance gas, and airspeed is 1000h-1. The test result shows that the desulfurization efficiency is 100 percent and the denitration efficiency is 88.6 percent.
Example 9
The desulfurization and denitrification catalyst prepared in the example 1 is loaded on a fixed bed, the temperature of the bed layer is raised to 500 ℃, after the catalyst is activated for 3 hours, the temperature is lowered to 300 ℃, and flue gas is introduced, wherein the flue gas comprises the following components: SO (SO)2500ppm、NO 500ppm、NH3 700ppm、O2The volume of the mixture is 8 percent,the nitrogen is balance gas, and the space velocity is 2000h-1. The test result shows that the desulfurization efficiency is 100 percent and the denitration efficiency is 85.9 percent.
Example 10
The desulfurization and denitrification catalyst prepared in the embodiment 2-4 is placed on a fixed bed, the temperature of the bed layer is raised to 500 ℃, the catalyst is activated for 3 hours, then the temperature is lowered to 320 ℃, and flue gas is introduced, wherein the flue gas comprises the following components: SO (SO)2 750ppm、NO 600ppm、NH3 800ppm、O2Volume is 8 percent, nitrogen is balance gas, and space velocity is 3000h-1. The test result shows that the desulfurization efficiency is 100 percent and the denitration efficiency is 85.2 percent.
Example 11
The catalyst prepared in examples 5 to 7 and used for simultaneous desulfurization and denitrification is placed on a fixed bed, the temperature of the bed layer is raised to 500 ℃, the catalyst is activated for 3 hours, then the temperature is lowered to 350 ℃, and flue gas is introduced, wherein the flue gas comprises the following components: SO (SO)2 750ppm、NO 700ppm、NH3 800ppm、O2Volume is 8 percent, nitrogen is balance gas, and airspeed is 5000h-1. The test result shows that the desulfurization efficiency is 100 percent and the denitration efficiency is 86.4 percent.

Claims (10)

1. A desulfurization and denitrification catalyst is characterized in that: the catalyst uses active coke as carrier and V2O5CuO and Fe are used as active components3O4、K2O, CoO is a modifier.
2. The catalyst according to claim 1, characterized in that the catalyst employs an active coke specific surface area of 280-400 m2/g。
3. The catalyst according to claim 1, characterized in that the catalyst active component V2O5Is prepared from ammonium metavanadate and modifier chosen from copper nitrate, iron nitrate, potassium nitrate and cobalt nitrate.
4. The catalyst of claim 1, wherein the active component and the modifier are respectively V in percentage by mass2O5 1-5%、CuO 2-5%、Fe3O4 2-5%、K2O 1-1.5%、Co1 to 1.5 percent of O and the balance of active coke carrier.
5. The method for preparing the catalyst according to claim 1, wherein the catalyst is loaded with the active component and the modifier by a step impregnation method.
6. The method according to claim 5, characterized by comprising the steps of: firstly, soaking an active coke carrier in a nitric acid solution, filtering, washing to be neutral, and drying for later use; secondly, weighing ammonium metavanadate according to the mass percentage, and preparing a solution by the ammonium metavanadate and oxalic acid; soaking active coke carrier by an isovolumetric soaking method, drying, and N2Roasting under the protection condition to obtain V2O5Active coke is used; weighing copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate according to mass percentage, adding deionized water, heating and stirring until the mixture is completely dissolved; fourthly, the roasted V2O5Adding active coke into the solution, soaking in the same volume, drying, and roasting to obtain the catalyst.
7. The method according to claim 6, characterized by comprising the steps of: firstly, soaking an active coke carrier for 3-5h by using a nitric acid solution with the concentration of 0.4mol/L, filtering and washing to be neutral, and drying in an oven for 5-6h at 120 ℃ for later use; secondly, weighing ammonium metavanadate according to mass percentage, weighing oxalic acid according to a molar ratio of 1:2, and preparing a solution; soaking active coke carrier for 5h by adopting an isovolumetric soaking method, drying in a 120 ℃ oven for 5-6h, and then drying in a 500 ℃ muffle furnace N2Roasting for 5 hours under the protection condition to obtain V2O5Active coke is used; weighing copper nitrate, ferric nitrate, potassium nitrate and cobalt nitrate according to mass percentage, adding deionized water, heating and stirring until the mixture is completely dissolved; fourthly, the roasted V2O5Adding active coke into the solution III, soaking for 6h in the same volume, drying in a 120 ℃ oven for 5-6h, and roasting in a 500 ℃ muffle furnace for 5-6h to obtain the catalyst.
8. The use of the catalyst according to claim 1, wherein the catalyst is used for desulfurization and denitrification reactions.
9. The use of claim 8, wherein the catalyst is activated at 500 ℃ for 2-3h before use in desulfurization and denitrification reactions.
10. The use of claim 8, wherein the catalyst is used in desulfurization and denitrification reactions under the following conditions: the reaction temperature is 280 plus 350 ℃, and the space velocity is 1000 plus 5000h-1The gas component is NO: 500-700ppm SO2:500-750ppm、NH3：600-800ppm、O2The total volume content is 8 percent, and the rest is N2The reaction is carried out at normal pressure.
CN201910591422.3A 2019-07-02 2019-07-02 Desulfurization and denitrification catalyst and preparation method thereof Pending CN112169808A (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN113522299A (en) * 2021-05-25 2021-10-22 宁夏亘峰嘉能能源科技股份有限公司 Desulfurization, denitrification and mercury removal catalyst and preparation method thereof
CN116272334A (en) * 2022-12-26 2023-06-23 杭州尚善若水环保科技有限公司 Coupling desulfurization and denitrification medicament, preparation method and use method thereof

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CN102764657A (en) * 2012-08-10 2012-11-07 武汉科技大学 Nano V205/activated coke denitration catalyst and preparation method of catalyst
CN104525116A (en) * 2014-12-31 2015-04-22 上海克硫环保科技股份有限公司 Desulfurization and denitrification modified active coke and preparation method thereof

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN102489307A (en) * 2011-12-10 2012-06-13 山西潞安矿业(集团)有限责任公司 Catalyst for removing sulfur and saltpeter in smoke and preparing method thereof and application thereof
CN102764657A (en) * 2012-08-10 2012-11-07 武汉科技大学 Nano V205/activated coke denitration catalyst and preparation method of catalyst
CN104525116A (en) * 2014-12-31 2015-04-22 上海克硫环保科技股份有限公司 Desulfurization and denitrification modified active coke and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113522299A (en) * 2021-05-25 2021-10-22 宁夏亘峰嘉能能源科技股份有限公司 Desulfurization, denitrification and mercury removal catalyst and preparation method thereof
CN116272334A (en) * 2022-12-26 2023-06-23 杭州尚善若水环保科技有限公司 Coupling desulfurization and denitrification medicament, preparation method and use method thereof
CN116272334B (en) * 2022-12-26 2023-08-15 杭州尚善若水环保科技有限公司 Coupling desulfurization and denitrification medicament, preparation method and use method thereof

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