CN102500359B - Vanadium based SCR catalyst as well as preparation and application thereof in tail gas NOx desorption after acrylonitrile oxidation - Google Patents
Vanadium based SCR catalyst as well as preparation and application thereof in tail gas NOx desorption after acrylonitrile oxidation Download PDFInfo
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- CN102500359B CN102500359B CN201110358295.6A CN201110358295A CN102500359B CN 102500359 B CN102500359 B CN 102500359B CN 201110358295 A CN201110358295 A CN 201110358295A CN 102500359 B CN102500359 B CN 102500359B
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Abstract
The invention relates to a vanadium based SCR catalyst as well as preparation and application thereof in tail gas NOx desorption after acrylonitrile oxidation. According to the invention, TiO2 is taken as a carrier, 1 to 8 wt percent of V2O5 is taken as an active component, 8 to 10 percent of WO3 is taken as addition agent, transition metal or rare-earth metallic element is taken as modifying component addition agent, the transition metal is Mn or Zr, the rare-earth element is Ce, Er and Tb, the content of transition metal is 2 to 20 percent, and the content of rare-earth element is 5 to 15 percent. The preparation method is as follows: dissolving V205 into oxalic acid water solution, then adding metallic element addition agent soluble salting liquid, stirring uniformly, dipping anatase crystal form TiO2 powder into mixed solution for stirring for 0.5 to 2h, then drying, and baking in air. 8 to 10 percent of WO3 is contained in the carrier. The invention has the advantages that the preparation process is simple, the repeatability is excellent, the industrial production is facilitated, mass NOX gas in the tail gas agter acrylonitrile oxidation can be effectively removed, and excellent thermal stability and low temperaure activity are shown.
Description
Technical field
The present invention relates to acrylonitrile installation tail gas catalytic purification technology, after particularly relating to a kind of vanadium base SCR catalyst and preparation and removing acrylonitrile oxidation, the application of NOx in tail gas, is specially the vanadium base SCR Catalysts and its preparation method for being rich in nitrogen oxide (NOx) tail gas clean-up after acrylonitrile oxidation.It for acrylonitrile absorbing tower oxidation processes after containing the high-efficient selective catalytic reduction of NOx tail gas, the preparation method of vanadium based selective catalytic reduction (SCR) catalyst in ammine selectivity catalytic reduction stage is provided, can have realized the efficient catalytic of NOx under excess oxygen in the rear tail gas of acrylonitrile oxidation and remove.
Background technology
Acrylonitrile, as important chemical intermediate, is widely used in the production of fiber, rubber and plastics three large synthetic materials.At present more than 95% device in the whole world adopts ammoxidation of propylene law technology (claiming again sohio method), taking propylene and ammonia as raw material, produces acrylonitrile, by-product acetonitrile and hydrogen cyanide.This method raw material is easy to get, operation is simple, stable operation, product purification are convenient, and through the development of nearly half a century, technology reaches its maturity.
Propylene ammonia catalytic technique is called tail gas from absorption tower (AOG from the waste gas that absorbs tower top discharge, Absorbed OffGas), one of primary pollution source of petroleum chemical industry generation, except Main Ingredients and Appearance nitrogen, also comprise the pollutants such as non-methane hydrocarbon, carbon monoxide, carbon dioxide, nitrogen carbonoxide and micro-acrylonitrile.Therefore directly tail gas is entered to atmosphere and can cause severe contamination to environment.Conventional vent gas treatment method comprises flame combustion method and Production by Catalytic Combustion Process at present.Flame combustion utilizes the heat of auxiliary fuel that pernicious gas is heated to reaction temperature (600～800 DEG C), make its contained combustible oxidation Decomposition, but this method need to be added auxiliary fuel, and operating cost is higher.Advanced Production by Catalytic Combustion Process is under the effect of catalyst, combustible in pernicious gas is decomposed at the lower complete oxidation that can reach of lower temperature (200～400 DEG C), generally do not need to add auxiliary fuel, the combustible that can be used for low concentration, complicated components purifies, and is the effective ways of administering Organic Waste Gas Pollution.This method purification efficiency is high, reaction temperature is low, do not produce secondary pollution, and has the advantages such as apparatus structure compactness, easy to operate, running expense is low, catalyst life is long, thereby is widely adopted.
When tail gas from absorption tower is after oxidation catalysis section, in tail gas, imflammable gas is oxidized to CO
2and nitrogen oxide (NO
x), need under excess oxygen, further make selective catalytic reduction catalysts to NO
xpurify.SCR technology (Selective Catalytic Reduction, SCR) is regarded as carrying out NO under excess oxygen
xcatalytic purification is one of effective method the most, wherein uses NH
3as the ammine selectivity catalytic reduction NO of reducing agent
x(NH
3-SCR) be the gas denitrifying technology being most widely used in the world.But, the denitration technology of China taking acrylonitrile off-gas emission control as target is at the early-stage, at present exhaust purifying method only for acrylonitrile off-gas oxidizing process (as patent CN101716462A, CN101138699A and CN1903415A), do not relate to the selective reduction of NOx under excess oxygen in the rear tail gas of acrylonitrile oxidation, do not have vanadium base NH yet
3-SCR catalyst is applied to the patented technology in this field.
Summary of the invention
The application of NOx in tail gas after the object of this invention is to provide a kind of vanadium base SCR catalyst and preparation and removing acrylonitrile oxidation.The vanadium base SCR method for preparing catalyst that it provides preparation to have wide active temperature windows and outstanding heat endurance can effectively be removed a large amount of NO in the rear tail gas of acrylonitrile oxidation under excess oxygen
xgas, shows superior heat endurance and low temperature active.Preparation process of the present invention is simple, reproducible, is conducive to suitability for industrialized production.
The invention provides a kind of vanadium base SCR catalyst is with TiO
2for carrier, with 1-8wt%V
2o
5for active component, the WO of 8-10%
3for auxiliary agent, taking transition metal or thulium as modified component additive, wherein transition metal is Mn or Zr, and rare earth element is Ce, Er, Tb, and levels of transition metals is 2-20%, and ree content is 5-15%.
Preparation process is: by V
2o
5be dissolved in oxalic acid aqueous solution, add the metallic element additive can salt salting liquid, stir, by anatase crystal TiO
2powder impregnated in mixed solution, stirs 0.5-2h, dry, roasting in air.Wherein, in carrier, contain the WO of 8-10%
3.
The preparation method's of a kind of vanadium base SCR catalyst provided by the invention step is:
1) at 60-75 DEG C, vanadium predecessor is dissolved in oxalic acid aqueous solution;
2) by commercial TiO
2(include the WO of 8-10%
3) powder impregnated in vanadium oxalate solution, stirs 0.5-2h, after rotation evaporate to dryness, be placed in 100 DEG C of baking ovens and dry 12-16 hour, and at 400-600 DEG C roasting 3-4h in air, make vanadium titanium powder.
3) get transition metal or rare-earth element modified component soluble-salt or oxide by metering, the aqueous solution that preparation ion concentration is 0.5～1.5mol/L, by 2) gained vanadium titanium powder double-steeping stirring 1-2h, 70 DEG C of rotation evaporates to dryness, be placed in again 100 DEG C of baking ovens and dry 12-16 hour, roasting 3-4h again in 400-600 DEG C of air, makes catalyst.
Described vanadium predecessor is, ammonium metavanadate NH
4vO
3, vanadic anhydride V
2o
5.
Described rare earth element soluble-salt is cerous nitrate Ce (NO
3)
36H
2o, cerous acetate Ce (CH
3cOO)
3nH
2o, erbium nitrate Er (NO
3)
36H
2o, acetic acid erbium Er (CH
3cOO)
34H
2o, terbium nitrate Tb (NO
3)
36H
2o, acetic acid terbium Tb (CH
3cOO)
3nH
2o.
Described transition metal is manganese or zirconium, and the soluble-salt of manganese is manganese nitrate Mn (NO
3)
24H
2o, manganese sulfate MnSO
44H
2o.Zr element soluble-salt is that zirconates is selected from zirconyl nitrate ZrO (NO
3)
25H
2o, zirconium nitrate Zr (NO
3)
43H
2o, zirconium oxychloride ZrOCl
28H
2o, acetic acid zirconium ZrO (CH
3cOO)
2.
The application of vanadium base SCR catalyst provided by the invention is for the high-efficient selective catalytic reduction containing NOx tail gas after acrylonitrile absorbing tower oxidation processes, can realize the efficient catalytic of NOx under excess oxygen in the rear tail gas of acrylonitrile oxidation and remove.
The application conditions of the SCR catalytic component based on vanadium of the wide active temperature windows purifying for acrylonitrile off-gas provided by the invention is: catalyst is placed in to tubular fixed-bed reactor, N
2for balanced atmosphere, pass into gaseous mixture, 500-2500ppm NO
x, 400-2500ppm NH
3, 3-7%O
2, air speed is 50000-200000h
-1, 150 DEG C-500 DEG C of reaction temperatures.
The SCR catalytic component based on vanadium of the wide active temperature windows purifying for acrylonitrile off-gas provided by the invention, for NO in tail gas after acrylonitrile catalytic oxidation
xremove, on traditional V-W-Ti catalyst basis, by adding different modified components, preparation process is simple, easy to operate.Catalyst of the present invention is introduced dissimilar modification component, and this system cryogenic property is promoted and has very large facilitation, has at utmost realized NO
xeffectively remove, realize the efficient processing to acrylonitrile poisonous and harmful tail gas.The present invention is reproducible, is conducive to suitability for industrialized production.
Brief description of the drawings
Fig. 1 is embodiment 1 and embodiment 2X x ray diffraction spectrogram.
Fig. 2 is the NO of embodiment 2
xcatalytic eliminating performance curve.
Fig. 3 is the NO of embodiment 3 (V1Ce10Zr10WT) and reference example 1 (V1WT)
xcatalytic eliminating performance comparison curves.
Detailed description of the invention
Below in conjunction with embodiment, technical characterictic of the present invention is described further:
Embodiment 1
Weigh 2.500g oxalic acid soluble in water, 70 DEG C of heating, magnetic agitation, to be dissolved after, weigh vanadium pentoxide powder 0.401g, be dissolved in oxalic acid solution, stir 1h, until vanadium pentoxide powder all dissolves, make vanadium oxalate solution.Weigh 10.00g titanium dioxide (commercially available), the WO that carrier itself contains 8-10%
3.Impregnated in vanadium oxalate solution, stir 1h, then, at 70 DEG C of rotation evaporates to dryness, be placed in 100 DEG C of baking ovens and dry 12 hours, roasting 3h in 500 DEG C of air, makes vanadium titanium powder.The deionized water taking a morsel, adds cerous nitrate Ce (NO
3)
36H
2o dissolves 2.4g, and the vanadium titanium powder of roasting is flooded wherein, stirs 1h, then at 70 DEG C of rotation evaporates to dryness, then is placed in 100 DEG C of baking ovens and dries 12 hours, and roasting 3h in 500 DEG C of air, makes embodiment 1.
Embodiment 2
Weigh 2.500g oxalic acid soluble in water, 70 DEG C of heating, magnetic agitation, to be dissolved after, weigh vanadium pentoxide powder 0.401g, be dissolved in oxalic acid solution, stir 1h, until vanadium pentoxide powder all dissolves, make vanadium oxalate solution.Weigh 10.00g titanium dioxide, the WO that carrier itself contains 8-10%
3.Impregnated in vanadium oxalate solution, stir 1h, then, at 70 DEG C of rotation evaporates to dryness, be placed in 100 DEG C of baking ovens and dry 14 hours, roasting 3h in 500 DEG C of air, makes vanadium titanium powder.The deionized water taking a morsel, adds zirconia 0.412g to dissolve, and the vanadium titanium powder of roasting flood wherein, stirs 1h, then rotates evaporates to dryness at 70 DEG C, then is placed in 100 DEG C of baking ovens and dries 14 hours, and roasting 3h in 500 DEG C of air, makes embodiment 2.2mL catalyst 2 is placed in to tubular reactor, and after simulation oxidation, acrylonitrile off-gas atmosphere is NO 500ppm, NH
3500ppm, O
25%, N
2for Balance Air, total gas flow rate is 1000mL/min, air speed 30,000h
-1, reaction temperature interval is from 150 DEG C to 500 DEG C.Use infrared-gas pond (Nicolet IR 380, ThermoFisher) to measure residual gas NO content in product, draw the NO conversion rate curve raising with temperature.Fig. 2 shows that embodiment 2 shows outstanding NO catalytic oxidation activity in 250 DEG C of-450 DEG C of temperature ranges.
Embodiment 3
Weigh 2.500g oxalic acid soluble in water, 70 DEG C of heating, magnetic agitation, to be dissolved after, weigh vanadium pentoxide powder 0.1g, be dissolved in oxalic acid solution, stir 1h, until vanadium pentoxide powder all dissolves, make vanadium oxalate solution.Weigh 10.00g titanium dioxide, the WO that carrier itself contains 8-10%
3.Impregnated in vanadium oxalate solution, stir 1h, then, at 70 DEG C of rotation evaporates to dryness, be placed in 100 DEG C of baking ovens and dry 16 hours, roasting 3h in 500 DEG C of air, makes vanadium titanium powder.The deionized water taking a morsel, adds cerous nitrate Ce (NO
3)
36H
2o 2.4g and zirconia 1.03g dissolve, and the vanadium titanium powder of roasting flood wherein, stir 1h, then rotate evaporates to dryness at 70 DEG C, then are placed in 100 DEG C of baking ovens and dry 16 hours, and roasting 3h in 500 DEG C of air, makes embodiment 3.2mL catalyst 3 is placed in to tubular reactor, and after simulation oxidation, acrylonitrile off-gas atmosphere is NO 500ppm, NH
3500ppm, O
25%, N
2for Balance Air, total gas flow rate is 1000mL/min, air speed 30,000h
-1, reaction temperature interval is from 150 DEG C to 500 DEG C.Use infrared-gas pond (Nicolet IR 380, ThermoFisher) to measure residual gas NO content in product, draw the NO conversion rate curve raising with temperature.Fig. 3 shows that embodiment 3 shows outstanding NO catalytic oxidation activity in 250 DEG C of-450 DEG C of temperature ranges.
Reference example 1
Weigh 2.500g oxalic acid soluble in water, 70 DEG C of heating, magnetic agitation, to be dissolved after, weigh vanadium pentoxide powder 0.1g, be dissolved in oxalic acid solution, stir 1h, until vanadium pentoxide powder all dissolves, make vanadium oxalate solution.Weigh 10.00g titanium dioxide, the WO that carrier itself contains 8-10%
3.Impregnated in vanadium oxalate solution, stir 1h, then, at 70 DEG C of rotation evaporates to dryness, be placed in 100 DEG C of baking ovens and dry 14 hours, roasting 3h in 500 DEG C of air, makes reference example 1 (being expressed as V1WT in figure).2mL reference example 1 is placed in to tubular reactor, and after simulation oxidation, acrylonitrile off-gas atmosphere is NO 500ppm, NH
3500ppm, O
25%, N
2for Balance Air, total gas flow rate is 1000mL/min, air speed 30,000h
-1, reaction temperature interval is from 150 DEG C to 500 DEG C.Use infrared-gas pond (Nicolet IR 380, ThermoFisher) to measure residual gas NO content in product, draw the NO conversion rate curve raising with temperature.Fig. 3 shows that reference agent 1 shows NO catalytic oxidation activity in 300 DEG C of-450 DEG C of temperature ranges.Embodiment catalyst 3 demonstrates apparently higher than the catalytic activity of reference example 1.
Claims (2)
1. a preparation method for vanadium base SCR catalyst, it is characterized in that through following step:
1) weigh 2.500g oxalic acid soluble in water, 70 DEG C of heating, magnetic agitation, to be dissolved after; Weigh vanadium pentoxide powder 0.1g, be dissolved in oxalic acid solution, stir 1h, until vanadium pentoxide powder all dissolves, make vanadium oxalate solution;
2) weigh 10.00g titanium dioxide, the WO that carrier itself contains 8-10%
3, impregnated in vanadium oxalate solution, stir 1h, then, at 70 DEG C of rotation evaporates to dryness, be placed in 100 DEG C of baking ovens and dry 16 hours, roasting 3h in 500 DEG C of air, makes vanadium titanium powder;
3) deionized water taking a morsel, adds cerous nitrate Ce (NO
3)
36H
2o2.4g and zirconia 1.03g dissolve, and the vanadium titanium powder of roasting flood wherein, stir 1h, then rotate evaporates to dryness at 70 DEG C, then are placed in 100 DEG C of baking ovens and dry 16 hours, roasting 3h in 500 DEG C of air.
2. preparation method according to claim 1, is characterized in that the method that this vanadium base SCR catalyst purifies for acrylonitrile off-gas is:
2mL catalyst is placed in to tubular reactor, and after simulation oxidation, acrylonitrile off-gas atmosphere is NO500ppm, NH
3500ppm, O
25%, N
2for Balance Air, total gas flow rate is 1000mL/min, air speed 30,000h
-1, reaction temperature interval is from 150 DEG C to 500 DEG C.
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| CN103657637B (en) * | 2013-12-11 | 2015-07-15 | 河南理工大学 | Preparation method of automobile exhaust catalyst |
| CN104014329A (en) * | 2014-05-09 | 2014-09-03 | 哈尔滨工程大学 | Preparation method of vanadium-based denitration catalyst |
| CN104069853B (en) * | 2014-07-16 | 2016-06-22 | 中国石油大学(北京) | A kind of regeneration fume from catalytic cracking purifies with vanadium titanium mesoporous microsphere solid solution catalyst, preparation method and its usage |
| CN104475120B (en) * | 2014-12-03 | 2017-06-06 | 天津大学 | Use for diesel engine cobalt vanadium binary oxide type SCR supported catalyst |
| CN105363430B (en) * | 2015-09-10 | 2018-07-13 | 上海大学 | Titania oxide supported vanadic acid cerium zirconium denitrating catalyst, preparation method and application |
| CN105817220B (en) * | 2016-05-03 | 2019-06-11 | 展宗城 | A kind of rare earth modified sulfur resistive low-temperature SCR catalyst and preparation method thereof |
| CN106582615A (en) * | 2016-11-29 | 2017-04-26 | 凯龙蓝烽新材料科技有限公司 | Preparation method for low-temperature V-W-TiO2 based selective reduction catalyst |
| CN108236944A (en) * | 2016-12-23 | 2018-07-03 | 中国科学院宁波城市环境观测研究站 | A kind of vanadium oxide catalyst and its application |
| CN109201042B (en) * | 2018-11-07 | 2021-08-10 | 清华大学盐城环境工程技术研发中心 | Preparation method and application of vanadium-doped umbrella-shaped manganese-cerium composite oxide catalyst |
| CN110052264B (en) * | 2019-05-21 | 2022-06-21 | 中国石油化工股份有限公司 | Preparation method of SCR denitration catalyst used under low temperature condition |
| CN113908824A (en) * | 2021-10-21 | 2022-01-11 | 浙江大学 | Method for activating the reactivity of a titanium dioxide-based catalyst and use thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101352679A (en) * | 2008-09-22 | 2009-01-28 | 南京工业大学 | Flue gas denitration SCR catalyst for fire coal electric power plant and preparation method thereof |
| CN101396655A (en) * | 2008-10-23 | 2009-04-01 | 清华大学 | Titanium-base multi-component catalyst for power plant flue-gas SCR denitration and preparation method thereof |
| CN101791551A (en) * | 2010-04-23 | 2010-08-04 | 沈炳龙 | Honeycomb catalyst for denitration of glass furnace fume and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101352679A (en) * | 2008-09-22 | 2009-01-28 | 南京工业大学 | Flue gas denitration SCR catalyst for fire coal electric power plant and preparation method thereof |
| CN101396655A (en) * | 2008-10-23 | 2009-04-01 | 清华大学 | Titanium-base multi-component catalyst for power plant flue-gas SCR denitration and preparation method thereof |
| CN101791551A (en) * | 2010-04-23 | 2010-08-04 | 沈炳龙 | Honeycomb catalyst for denitration of glass furnace fume and preparation method thereof |
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