CN102716753B - Catalyst for low-temperature selective catalytic reduction of nitric oxide and preparation method of catalyst - Google Patents
Catalyst for low-temperature selective catalytic reduction of nitric oxide and preparation method of catalyst Download PDFInfo
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Abstract
The invention relates to a catalyst for low-temperature selective catalytic reduction of nitric oxide and the preparation method of the catalyst. The catalyst comprises a carrier material and a catalyst material, wherein the carrier material is 75-99.7 in parts by weight and is one of TiO2, activated carbon or carbon molecular sieve; the catalyst material comprises any three or four of the following compositions in parts by weight: 0.1-5 parts of V2O5, 0.1-5 parts of MoO2, 0.1-5 parts of MnO2 and 0.1-5 parts of CuO. The catalyst has the advantages of stable product quality, low preparation cost, high catalytic activity and good effect, is simple and easy to prepare and can adapt to low-temperature condition.
Description
Technical field
The present invention relates to a kind of Catalysts and its preparation method for low-temperature selective catalytic reduction of nitric oxide.
Background technology
At present, China " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) puts into effect, new standard is to flue dust, sulfur dioxide, the Air Pollutants such as nitrogen oxide propose stricter emission request, coal-burning power plant is as the topmost source of China's NOx discharge capacity, existing low NOx combusting technology is only relied on to be difficult to satisfied strict NOx emission requirement, need to adopt gas denitrifying technology to reduce the discharge of NOx further, SCR gas denitrifying technology is because of its technology maturation, denitration rate is high become stationary source especially coal fired power plant control the first-selection of NOx emission.
High performance catalyst is the key of SCR gas denitrifying technology, the SCR catalyst reaction temperature of extensively research is generally at 300 ~ 400 DEG C at present, easily there is ablation phenomen in the high catalyst that causes of temperature, temperature is low, can reduce the activity of catalyst own and not reach higher denitration efficiency.The coal unit of in addition 2004 being gone into operation before, whole nothing reserves denitration space, this unit is as carried out denitration transformation, then must carry out large transformation to existing deduster, which further increases the cost of denitration transformation, cause unnecessary waste, after denitrification apparatus is installed to deduster, then the too low catalyst that has influence on of flue-gas temperature itself is active, is therefore badly in need of a kind of SCR catalyst that can adapt under cryogenic conditions.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of formula Design rationally, can adapt to that cryogenic conditions, catalytic activity are high, the catalyst for low-temperature selective catalytic reduction of nitric oxide of excellent catalytic effect.
Another technical problem to be solved by this invention be to provide a kind of technological design rationally, be simple and easy to system, constant product quality, the method for preparing catalyst for low-temperature selective catalytic reduction of nitric oxide that cost is low.
It is a kind of catalyst for low-temperature selective catalytic reduction of nitric oxide that the present invention solves the problems of the technologies described above adopted technical scheme, be made up of carrier material and catalyst material, wherein, described carrier material is 75 ~ 99.7 weight portions, and described carrier material is the one in TiO2, activated carbon or carbon molecular sieve; Described catalyst material is MoO
2, V
2o
5, MnO
2, in CuO any three kinds or four kinds, the content of described each component of catalyst material is, V
2o
5: 0.1 ~ 5 weight portion, MoO
20.1 ~ 5 weight portion, MnO
20.1 ~ 5 weight portion, CuO0.1 ~ 5 weight portion.
As preferably, the present invention is made up of carrier material and catalyst material, and wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is the one in TiO2, activated carbon or carbon molecular sieve; Described catalyst material is MoO
2, V
2o
5, MnO
2, the content of described each component of catalyst material is, V
2o
5: 0.1 ~ 5 weight portion, MoO
20.1 ~ 5 weight portion, MnO
20.1 ~ 5 weight portion.
As preferably, the present invention is made up of carrier material and catalyst material, and wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is the one in TiO2, activated carbon or carbon molecular sieve; Described catalyst material is MoO
2, V
2o
5, CuO, the content of described each component of catalyst material is, V
2o
5: 0.1 ~ 5 weight portion, MoO
20.1 ~ 5 weight portion, CuO0.1 ~ 5 weight portion.
As preferably, the present invention is made up of carrier material and catalyst material, and wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is the one in TiO2, activated carbon or carbon molecular sieve; Described catalyst material is MoO
2, MnO
2, CuO, the content of described each component of catalyst material is, MoO
20.1 ~ 5 weight portion, MnO
20.1 ~ 5 weight portion, CuO0.1 ~ 5 weight portion.
As preferably, the present invention is made up of carrier material and catalyst material, and wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is the one in TiO2, activated carbon or carbon molecular sieve; Described catalyst material is V
2o
5, MnO
2, CuO, the content of described each component of catalyst material is, V
2o
5: 0.1 ~ 5 weight portion, MnO
20.1 ~ 5 weight portion, CuO0.1 ~ 5 weight portion.
The present invention solves the problems of the technologies described above adopted technical scheme or a kind of method for preparing catalyst for low-temperature selective catalytic reduction of nitric oxide, and described preparation process is:
A, by TiO
2calcine under temperature is 500 ~ 600 DEG C of conditions, obtain the carrier with cavernous stable microcellular structure, as carrier material; Or, activated carbon coal pulverizer ground and sieve, obtaining 20 ~ 60 object activated carbon as carrier material; Or get micropore size and be distributed in the carbon molecular sieve of 0.3 ~ 1nm as carrier material;
B, to be stirred by ammonium molybdate make it to be dissolved in oxalic acid solution under 50 ~ 70 DEG C of conditions, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid, obtains containing molybdenum solution;
C, by NH
4vO
3be dissolved under 50 ~ 70 DEG C of conditions in oxalic acid solution, NH
4vO
3be 1:2 with the ratio of the amount of substance of oxalic acid; Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color, obtain containing vanadium solution;
D, be dissolved in oxalic acid solution by manganese nitrate or manganese acetate at 30-50 DEG C, manganese nitrate or manganese acetate are 1:3 with the ratio of the amount of substance of oxalic acid; Stir after 10 ~ 30 minutes, leave standstill 15 ~ 30 hours, obtain manganese containing solution;
E, be dissolved in oxalic acid solution by copper nitrate at 30-50 DEG C, copper nitrate is 1:3 with the ratio of the amount of substance of oxalic acid; Stir after 10 ~ 30 minutes, leave standstill 15 ~ 30 hours, obtain copper-containing solution;
Any three kinds or four kinds in the copper-containing solution that f, the manganese containing solution obtained containing vanadium solution, steps d obtained containing molybdenum solution, c obtained by step b, step e obtain, the carrier material obtained with step a adopts equi-volume impregnating mixing and stirring;
G, then, utilize ultrasonic washing instrument ultrasonic vibration 10 ~ 60min, then stir 10 ~ 60min with evaporate to dryness limit, water-bath 70 ~ 90 DEG C of limits;
H, then dry 12 ~ 24h at 105 ~ 130 DEG C in air atmosphere;
J, under 400 DEG C ~ 550 DEG C temperature conditions, calcine 3-5 hour again, obtain load V
2o
5, MoO
2, MnO
2with the catalyst for low-temperature selective catalytic reduction of nitric oxide of any three kinds or four kinds in CuO.
As preferably, in step b of the present invention, ammonium molybdate stirs and makes it to be dissolved in ethanolic solution under 50 ~ 70 DEG C of conditions, and ammonium molybdate is 1:2 with the ratio of the amount of substance of ethanol.
The present invention compares with existing technology, has the following advantages and feature: 1, catalyst activity temperature is low, effectively can prevent the ablation of catalyst, the extending catalyst life-span; 2, to the catalytic reduction of nitrogen oxide, there is higher activity and selectivity; 3, to performing low-load running of machine set operating mode, there is stronger adaptability; 4, preparation technology is simple, cost is lower.The catalytic reduction of nitrogen oxide in flue gas selective catalytic reduction denitrification process can be widely used in.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment 1
1) TiO2 of 80 kilograms is calcined under temperature is 550 DEG C of conditions, obtain the carrier with cavernous stable microcellular structure.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 7.97 kilograms and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 3.85 kilograms
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese nitrate of 8.63 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) be dissolved in oxalic acid solution by the copper nitrate of 9.11 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
6) by step 2) solution, 3 that obtains) carrier that obtains of the solution that obtains of the solution, the step 4) that the obtain solution, the step 5) that obtain and step 1) adopts equi-volume impregnating mixing and stirring, utilize ultrasonic washing instrument ultrasonic vibration 20min, 20min is stirred again with evaporate to dryness limit, water-bath 70 DEG C of limits, then dry 12h at 110 DEG C in air atmosphere, calcine 5 hours under 450 DEG C of temperature conditions again, obtain load V
2o
5, MnO
2, MnO
2selective catalytic reduction denitrating catalyst with CuO, consists of by a kilogram catalyst: carrier TiO
280 kilograms, active component V
2o
53 kilograms, active component MoO
23 kilograms, active component MnO
23 kilograms, active component CuO3 kilogram.
Experiment 1.
By in embodiment 1 system selective catalytic reduction denitrating catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 85%, 150-200 DEG C higher than 75%.
Embodiment 2
1) the activated carbon coal pulverizer of 80 kilograms ground and sieves, obtaining 20 ~ 60 object activated carbon as carrier.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 7.97 kilograms and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 3.85 kilograms
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese acetate of 8.63 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) be dissolved in oxalic acid solution by the copper nitrate of 9.11 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
6) by step 2) solution, 3 that obtains) carrier that obtains of the solution that obtains of the solution, the step 4) that the obtain solution, the step 5) that obtain and step 1) adopts equi-volume impregnating mixing and stirring, utilize ultrasonic washing instrument ultrasonic vibration 40min, 60min is stirred again with evaporate to dryness limit, water-bath 70 DEG C of limits, after at room temperature place 4 h, then 55 DEG C of dry 12h in vacuum drying chamber, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MnO
2, MnO
2selective catalytic reduction denitrating catalyst with CuO, consists of by a kilogram catalyst: carrier active carbon 80 kilograms, active component V
2o
53 kilograms, active component MoO
23 kilograms, active component MnO
23 kilograms, active component CuO 3 kilograms;
Experiment 2.
By system in embodiment 2 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 84%, 150-200 DEG C higher than 72%.
Embodiment 3
1) micropore size getting 80 kilograms is distributed in the carbon molecular sieve of 0.3 ~ 1nm as catalyst carrier.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 7.97 kilograms and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 3.85 kilograms
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese nitrate of 8.63 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) be dissolved in oxalic acid solution by the copper nitrate of 9.11 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
6) by step 2) solution, 3 that obtains) solution that obtains of the solution that obtains of the solution, the step 4) that obtain and step 5) adopts equal-volume mixing and stirring to obtain mixed solution, after carrier that step 1) is obtained to be immersed in mixed solution 18 hours, ultrasonic washing instrument ultrasonic vibration 40min is utilized every 3 hours, after in vacuum drying chamber 55 DEG C of dry 12h, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 DEG C of dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MnO
2, MnO
2selective catalytic reduction denitrating catalyst with CuO, consists of by a kilogram catalyst: 80 kilograms, carrier carbon molecular sieve, active component V
2o
53 kilograms, active component MoO
23 kilograms, active component MnO
23 kilograms, active component CuO3 kilogram.
Experiment 3.
By system in embodiment 2 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 86%, 150-200 DEG C higher than 74%.
Embodiment 4
1) micropore size getting 80 kilograms is distributed in the carbon molecular sieve of 0.3 ~ 1nm as catalyst carrier.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 13.3 kilograms and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 6.43 kilograms
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese acetate of 14.1 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) by step 2) solution, 3 that obtains) solution that obtains of the solution that obtains and step 4) adopts equal-volume mixing and stirring to obtain mixed solution, after carrier that step 1) is obtained to be immersed in mixed solution 18 hours, ultrasonic washing instrument ultrasonic vibration 40min is utilized every 3 hours, after in vacuum drying chamber 55 DEG C of dry 12h, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 DEG C of dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MoO
2and MnO
2selective catalytic reduction denitrating catalyst, consist of by a kilogram catalyst: 80 kilograms, carrier carbon molecular sieve, active component V
2o
55 kilograms, active component MoO
25 kilograms, active component MnO
25 kilograms.
Experiment 4.
By system in embodiment 4 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 83.8%, 150-200 DEG C higher than 72.6%.
Embodiment 5
1) by the TiO of 99.7 kilograms
2calcine under temperature is 550 DEG C of conditions, obtain the carrier with cavernous stable microcellular structure.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 0.27 kilogram and make it to be dissolved in oxalic acid or wine solution, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 0.13 kilogram
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese nitrate of 0.29 kilogram at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) be dissolved in oxalic acid solution by the copper nitrate of 0.30 kilogram at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
6) carrier that solution step 4) obtained and step 1) obtain adopts equi-volume impregnating mixing and stirring, utilize ultrasonic washing instrument ultrasonic vibration 400min, 40min is stirred again with evaporate to dryness limit, water-bath 70 DEG C of limits, then 120h is dried at 110 DEG C in an oven, under 450 DEG C of temperature conditions, calcine 3h again, obtain load MnO
2secondary carrier.
7) by step 2) solution, 3 that obtains) solution that obtains of the solution that obtains and step 5) adopts equal-volume mixing and stirring to obtain mixed solution, after carrier that step 1) is obtained to be immersed in mixed solution 18 hours, ultrasonic washing instrument ultrasonic vibration 40min is utilized every 3 hours, after in vacuum drying chamber 55 DEG C of dry 12h, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 DEG C of dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MnO
2, MnO
2with CuO selective catalytic reduction denitrating catalyst, consist of by a kilogram catalyst: carrier TiO
299.7 kilograms, active component V
2o
50.1 kilogram, active component MoO
20.1 kilogram, active component MnO
20.1 kilogram, active component CuO 0.1 kilogram.
Experiment 5.
By system in embodiment 5 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 76.8%, 150-200 DEG C higher than 66%.
Embodiment 6
1) micropore size getting 80 kilograms is distributed in the carbon molecular sieve of 0.3 ~ 1nm as catalyst carrier.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 13.3 kilograms and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 6.43 kilograms
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese nitrate of 14.38 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) be dissolved in oxalic acid solution by the copper nitrate of 15.19 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
6) by step 2) solution, 3 that obtains) solution that obtains of the solution that obtains of the solution, the step 4) that obtain and step 5) adopts equal-volume mixing and stirring to obtain mixed solution, after carrier that step 1) is obtained to be immersed in mixed solution 18 hours, ultrasonic washing instrument ultrasonic vibration 40min is utilized every 3 hours, after in vacuum drying chamber 55 DEG C of dry 12h, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 DEG C of dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MnO
2, MnO
2selective catalytic reduction denitrating catalyst with CuO, consists of by a kilogram catalyst: 80 kilograms, carrier carbon molecular sieve, active component V
2o
55 kilograms, active component MoO
25 kilograms, active component MnO
25 kilograms, active component CuO5 kilogram.
Experiment 6.
By system in embodiment 2 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 89%, 150-200 DEG C higher than 79%.
Embodiment 7
1) micropore size getting 85 kilograms is distributed in the carbon molecular sieve of 0.3 ~ 1nm as catalyst carrier.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 7.97 kilograms and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 6.43 kilograms
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese acetate of 8.46 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) by step 2) solution, 3 that obtains) solution that obtains of the solution that obtains and step 4) adopts equal-volume mixing and stirring to obtain mixed solution, after carrier that step 1) is obtained to be immersed in mixed solution 18 hours, ultrasonic washing instrument ultrasonic vibration 40min is utilized every 3 hours, after in vacuum drying chamber 55 DEG C of dry 12h, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 DEG C of dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MoO
2and MnO
2selective catalytic reduction denitrating catalyst, consist of by a kilogram catalyst: 85 kilograms, carrier carbon molecular sieve, active component V
2o
53 kilograms, active component MoO
25 kilograms, active component MnO
23 kilograms.
Experiment 7.
By system in embodiment 4 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 85.8%, 150-200 DEG C higher than 74.6%.
Embodiment 8
1) by the TiO of 90 kilograms
2calcine under temperature is 550 DEG C of conditions, obtain the carrier with cavernous stable microcellular structure.
2) stirred under 60 DEG C of conditions by the copper nitrate of 9.11 kilograms and make it to be dissolved in oxalic acid, nitric acid is 1:3 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 0.13 kilogram
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese acetate of 14.1 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) by step 2) solution, 3 that obtains) solution that obtains of the solution that obtains and step 4) adopts equal-volume mixing and stirring to obtain mixed solution, after carrier that step 1) is obtained to be immersed in mixed solution 18 hours, ultrasonic washing instrument ultrasonic vibration 40min is utilized every 3 hours, after in vacuum drying chamber 55 DEG C of dry 12h, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 DEG C of dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MoO
2and MnO
2selective catalytic reduction denitrating catalyst, consist of by a kilogram catalyst: carrier TiO
290 kilograms, active component V
2o
50.1 kilogram, active component CuO 3 kilograms, active component MnO
25 kilograms.
Experiment 8.
By system in embodiment 4 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 81.8%, 150-200 DEG C higher than 71.6%.
Embodiment 9
1) micropore size getting 88 kilograms is distributed in the carbon molecular sieve of 0.3 ~ 1nm as catalyst carrier.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 7.97 kilograms and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) be dissolved in oxalic acid solution by the manganese nitrate of 8.63 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
4) be dissolved in oxalic acid solution by the copper nitrate of 9.11 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) by step 2) solution, 3 that obtains) solution that obtains of the solution that obtains and step 4) adopts equal-volume mixing and stirring to obtain mixed solution, after carrier that step 1) is obtained to be immersed in mixed solution 18 hours, ultrasonic washing instrument ultrasonic vibration 40min is utilized every 3 hours, after in vacuum drying chamber 55 DEG C of dry 12h, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 DEG C of dry 3h in Ar gas atmosphere again.Obtain load MnO
2, MnO
2selective catalytic reduction denitrating catalyst with CuO, consists of by a kilogram catalyst: 88 kilograms, carrier carbon molecular sieve, active component MoO
23 kilograms, active component MnO
23 kilograms, active component CuO3 kilogram.
Experiment 9.
By system in embodiment 4 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 82.5%, 150-200 DEG C higher than 72.9%.
Embodiment 10
1) the activated carbon coal pulverizer of 86 kilograms ground and sieves, obtaining 20 ~ 60 object activated carbon as carrier.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 0.27 kilogram and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 6.43 kilograms
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the copper nitrate of 0.30 kilogram at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) by step 2) solution, 3 that obtains) carrier that obtains of the solution that obtains of the solution, the step 4) that obtain and step 1) adopts equi-volume impregnating mixing and stirring, utilize ultrasonic washing instrument ultrasonic vibration 40min, 60min is stirred again with evaporate to dryness limit, water-bath 70 DEG C of limits, after at room temperature place 4 h, then 55 DEG C of dry 12h in vacuum drying chamber, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MnO
2selective catalytic reduction denitrating catalyst with CuO, consists of by a kilogram catalyst: carrier active carbon 86 kilograms, active component V
2o
55 kilograms, active component MoO
20.1 kilogram, active component CuO 0.1 kilogram;
Experiment 10.
By system in embodiment 2 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 79%, 150-200 DEG C higher than 68%.
Embodiment 11
1) the activated carbon coal pulverizer of 90 kilograms ground and sieves, obtaining 20 ~ 60 object activated carbon as carrier.
2) stirred under 60 DEG C of conditions by the ammonium molybdate of 7.97 kilograms and make it to be dissolved in oxalic acid, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid.
3) by the NH of 0.13 kilogram
4vO
3be dissolved under 60 DEG C of conditions in oxalic acid solution, the ratio of the amount of substance of the two is 1:2.Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color.
4) be dissolved in oxalic acid solution by the manganese acetate of 8.63 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
5) be dissolved in oxalic acid solution by the copper nitrate of 15.2 kilograms at 40 DEG C, the ratio of the amount of substance of the two is 1:3.Stir after 30 minutes, leave standstill 20 hours.
6) by step 2) solution, 3 that obtains) carrier that obtains of the solution that obtains of the solution, the step 4) that the obtain solution, the step 5) that obtain and step 1) adopts equi-volume impregnating mixing and stirring, utilize ultrasonic washing instrument ultrasonic vibration 40min, 60min is stirred again with evaporate to dryness limit, water-bath 70 DEG C of limits, after at room temperature place 4 h, then 55 DEG C of dry 12h in vacuum drying chamber, be warming up to 110 DEG C of drying 5 h again, dried catalyst is 250 dry 3h in Ar gas atmosphere again.Obtain load V
2o
5, MnO
2, MnO
2selective catalytic reduction denitrating catalyst with CuO, consists of by a kilogram catalyst: carrier active carbon 80 kilograms, active component V
2o
50.1 kilogram, active component MoO
23 kilograms, active component MnO
23 kilograms, active component CuO 5 kilograms;
Experiment 11.
By system in embodiment 2 catalyst pulverize and sieve, obtaining particle diameter is catalyst granules between 60 order to 40 orders, and get this catalyst granules 1ml and put into catalyst activity evaluating apparatus, activity rating is carry out in the fixed bed reactors of 8mm at internal diameter.Simulated flue gas consists of 0.1%NO, 0.1%SO
2, 10%H
2o, 0.1%NH
3and 3%O
2, N
2for Balance Air, air speed is 30000h-1, NH
3/ NO is 1.Detect 200-300 DEG C time denitration efficiency higher than denitration efficiency during 83.8%, 150-200 DEG C higher than 72.9%.
In the embodiment above, ammonium molybdate also can be dissolved in ethanolic solution, namely carrys out alternative oxalic acid solution with ethanolic solution.
In addition, it should be noted that, the specific embodiment described in this description, its formula, title that technique is named etc. can be different.All equivalences of doing according to structure, feature and the principle described in inventional idea of the present invention or simple change, be included in the protection domain of patent of the present invention.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Although the present invention with embodiment openly as above; but it is also not used to limit protection scope of the present invention; any technical staff being familiar with this technology, not departing from the change and retouching done in the spirit and scope of the present invention, all should belong to protection scope of the present invention.
Claims (6)
1. for a catalyst for low-temperature selective catalytic reduction of nitric oxide, it is characterized in that: be made up of carrier material and catalyst material, wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is TiO
2, one in activated carbon or carbon molecular sieve; Described catalyst material is MoO
2, V
2o
5, MnO
2, in CuO any three kinds or four kinds, the content of described each component of catalyst material is, V
2o
5: 0.1 ~ 5 weight portion, MoO
20.1 ~ 5 weight portion, MnO
20.1 ~ 5 weight portion, CuO0.1 ~ 5 weight portion.
2. the catalyst for low-temperature selective catalytic reduction of nitric oxide according to claim 1, is characterized in that: be made up of carrier material and catalyst material, and wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is TiO
2, one in activated carbon or carbon molecular sieve; Described catalyst material is MoO
2, V
2o
5, MnO
2, the content of described each component of catalyst material is, V
2o
5: 0.1 ~ 5 weight portion, MoO
20.1 ~ 5 weight portion, MnO
20.1 ~ 5 weight portion.
3. the catalyst for low-temperature selective catalytic reduction of nitric oxide according to claim 1, is characterized in that: be made up of carrier material and catalyst material, and wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is TiO
2, one in activated carbon or carbon molecular sieve; Described catalyst material is MoO
2, V
2o
5, CuO, the content of described each component of catalyst material is, V
2o
5: 0.1 ~ 5 weight portion, MoO
20.1 ~ 5 weight portion, CuO0.1 ~ 5 weight portion.
4. the catalyst for low-temperature selective catalytic reduction of nitric oxide according to claim 1, is characterized in that: be made up of carrier material and catalyst material, and wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is TiO
2, one in activated carbon or carbon molecular sieve; Described catalyst material is MoO
2, MnO
2, CuO, the content of described each component of catalyst material is, MoO
20.1 ~ 5 weight portion, MnO
20.1 ~ 5 weight portion, CuO0.1 ~ 5 weight portion.
5. the catalyst for low-temperature selective catalytic reduction of nitric oxide according to claim 1, is characterized in that: be made up of carrier material and catalyst material, and wherein, described carrier material is 80 ~ 99.7 weight portions, and described carrier material is TiO
2, one in activated carbon or carbon molecular sieve; Described catalyst material is V
2o
5, MnO
2, CuO, the content of described each component of catalyst material is, V
2o
5: 0.1 ~ 5 weight portion, MnO
20.1 ~ 5 weight portion, CuO0.1 ~ 5 weight portion.
6. the preparation method of catalyst as claimed in any of claims 1 to 5, is characterized in that: described preparation process is:
A, by TiO
2calcine under temperature is 500 ~ 600 DEG C of conditions, obtain the carrier with cavernous stable microcellular structure, as carrier material; Or, activated carbon coal pulverizer ground and sieve, obtaining 20 ~ 60 object activated carbon as carrier material; Or get micropore size and be distributed in the carbon molecular sieve of 0.3 ~ 1nm as carrier material;
B, to be stirred by ammonium molybdate make it to be dissolved in oxalic acid solution under 50 ~ 70 DEG C of conditions, ammonium molybdate is 1:2 with the ratio of the amount of substance of oxalic acid, obtains containing molybdenum solution;
C, by NH
4vO
3be dissolved under 50 ~ 70 DEG C of conditions in oxalic acid solution, NH
4vO
3be 1:2 with the ratio of the amount of substance of oxalic acid; Slowly heat under the condition of magnetic stirring apparatus rapid stirring, until solution changes navy blue into gradually by brown color, obtain containing vanadium solution;
D, be dissolved in oxalic acid solution by manganese nitrate or manganese acetate at 30-50 DEG C, manganese nitrate or manganese acetate are 1:3 with the ratio of the amount of substance of oxalic acid; Stir after 10 ~ 30 minutes, leave standstill 15 ~ 30 hours, obtain manganese containing solution;
E, be dissolved in oxalic acid solution by copper nitrate at 30-50 DEG C, copper nitrate is 1:3 with the ratio of the amount of substance of oxalic acid; Stir after 10 ~ 30 minutes, leave standstill 15 ~ 30 hours, obtain copper-containing solution;
Any three kinds or four kinds in the copper-containing solution that f, the manganese containing solution obtained containing vanadium solution, steps d obtained containing molybdenum solution, c obtained by step b, step e obtain, the carrier material obtained with step a adopts equi-volume impregnating mixing and stirring;
G, then, utilize ultrasonic washing instrument ultrasonic vibration 10 ~ 60min, then stir 10 ~ 60min with evaporate to dryness limit, water-bath 70 ~ 90 DEG C of limits;
H, then dry 12 ~ 24h at 105 ~ 130 DEG C in air atmosphere;
J, under 400 DEG C ~ 550 DEG C temperature conditions, calcine 3-5 hour again, obtain load V
2o
5, MnO
2, MnO
2with the catalyst for low-temperature selective catalytic reduction of nitric oxide of any three kinds or four kinds in CuO.
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| DE102015209987A1 (en) * | 2014-06-04 | 2015-12-10 | Johnson Matthey Public Limited Company | Non-PGM ammonia slip catalyst |
| CN106029224A (en) * | 2014-10-31 | 2016-10-12 | 云南创森环保科技有限公司 | Nitrogen oxide ammonia-free low-temperature selective reduction catalyst, preparation method therefor, and uses thereof |
| CN104402736B (en) * | 2014-12-10 | 2016-04-06 | 河北工业大学 | Benzene and the hydroxylammonium salt of the catalysis of a kind of loading type molybdenum dioxide react the method directly preparing aniline |
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| CN107321346A (en) * | 2017-07-26 | 2017-11-07 | 大唐南京环保科技有限责任公司 | A kind of preparation method of low temperature Plate-type denitration catalyst |
| CN107519859A (en) * | 2017-09-21 | 2017-12-29 | 北京科技大学 | Purify the Ce Zr MnO of NO and VOCs in coal-fired flue-gas simultaneously for low temperature2Method for preparing catalyst |
| CN107930678A (en) * | 2017-12-05 | 2018-04-20 | 合肥神舟催化净化器股份有限公司 | A kind of selective catalytic reduction catalysts and preparation method based on copper vanadium dual metal modified molecular screen |
| CN111495174A (en) * | 2019-01-30 | 2020-08-07 | 国家能源投资集团有限责任公司 | Denitration catalyst and preparation method and application thereof |
| CN109876798A (en) * | 2019-03-12 | 2019-06-14 | 华侨大学 | A kind of V-Mn base low temperature SCR denitration catalyst and preparation method thereof |
| CN115282773A (en) * | 2022-08-23 | 2022-11-04 | 山东菲天环保科技有限公司 | Catalytic denitration post |
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