CN102631921B - Nitric acid exhaust gas denitration catalyst and preparation method thereof - Google Patents
Nitric acid exhaust gas denitration catalyst and preparation method thereof Download PDFInfo
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- CN102631921B CN102631921B CN201210079961.7A CN201210079961A CN102631921B CN 102631921 B CN102631921 B CN 102631921B CN 201210079961 A CN201210079961 A CN 201210079961A CN 102631921 B CN102631921 B CN 102631921B
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Abstract
The invention discloses a nitric acid exhaust gas denitration catalyst and a preparation method thereof. In the catalyst, active aluminum oxide is used as a support, copper oxide is used as an active component, and two MOxs are used as assistants, wherein M is ferrum, chromium, nickel, vanadium, manganese, zinc, magnesium, titanium, zirconium, molybdenum, tungsten or cerium. The catalyst comprises the following components in percentage by mass: 1-10% of copper oxide, 1-25% of two MOxs and the balance of aluminum oxide support. The preparation method comprises the following steps: impregnating active aluminum oxide in an assistant metal salt solution, drying by roasting, impregnating in a cupric salt solution, and drying to obtain the catalyst. The catalyst disclosed by the invention is suitable for removing NOx in the nitric acid exhaust gas, and the lowest reaction temperature can reach 120 DEG C. The catalyst has the obvious advantages of low activity initiating temperature, high NOx conversion rate, simple preparation technique and the like.
Description
Technical field
The present invention relates to a kind of denitrating catalyst and preparation method thereof, more particularly a kind of denitrating catalyst that in nitric acid tail gas, NOx removes and preparation method thereof that is applicable to.
Background technology
China is nitric acid production big country, and within 2008, nitric acid total output reaches 777.7 ten thousand tons, ranks first in the world.Custom grouped by sector, the broad sense nitric acid industry that said nitric acid industry refers to here, comprises red fuming nitric acid (RFNA), rare nitric acid, nitrate etc.Nitric acid industry is in extraordinary high speed development state at present, and forward nitric acid production power strides forward.Before 2011, China does not have special nitric acid industry pollutant emission standard.< < discharge standard of air pollutants > > (GB16297-1996) is carried out in nitric acid industry toxic emission, and GB16297-1996 stipulates existing nitric acid production plant emission limits of nitrogen oxides 1700mg/m
3, new nitric acid production plant emission limit 1400mg/m
3.On March 1st, 2011, nitric acid industry pollutant emission standard (GB26131-2010) is formally implemented, this standard-required existing enterprise from 1 day March in 2011 to Pollution Index in Air Nitric Oxides concentration of emission limit value≤500mg/m on March 31st, 2013
3, Pollution Index in Air Nitric Oxides concentration of emission limit value≤300mg/m from 1 day April in 2013
3; Newly-built enterprise is Pollution Index in Air Nitric Oxides concentration of emission limit value≤300mg/m from 1 day March in 2011
3; Carry out the region of the special emission limit of atmosphere pollution, Pollution Index in Air Nitric Oxides concentration of emission limit value≤200mg/m
3.State compulsion by nitric acid production plant emission limits of nitrogen oxides by 1700mg/m
3significantly be reduced to≤500mg/m
3, even≤200mg/m
3, it is huge that it reduces discharging resolution, and the emission reduction tasks of nitric acid industry is very arduous.
Current domestic denitration research mainly concentrates on denitrating flue gas field, conventionally adopts to take SCR (SCR) technique that ammonia is reducing agent, and applied is mainly V
2o
5/ TiO
2series, this catalyst has very high catalytic activity, but in application, has the following disadvantages at home: the one, reaction temperature is higher, and operating temperature is necessary>=and 350 ℃; The 2nd, this catalyst generally adopts coating process preparation, and active component easily comes off, and water-fast acid resistance is poor; The 3rd, take high-purity titanium oxide as carrier, domestic can not production, and complex forming technology, expensive; The 4th, the core technology of this catalyst is abroad monopolized, and applies at home and needs to pay higher utilization expense.And nitric acid tail gas delivery temperature generally lower (100 ℃ of <), amount of nitrogen oxides is higher, relative humidity is large and contain acid mist, and the NOx that therefore traditional catalyst for denitrating flue gas is not suitable for nitric acid tail gas removes, and need to develop special-purpose nitric acid tail gas denitrating catalyst.
Summary of the invention
The object of the present invention is to provide a kind of special-purpose denitrating catalyst that in nitric acid tail gas, NOx removes and preparation method thereof that is applicable to, can meet the requirement that removes of industrial nitric acid tail gas NOx.
Realize the technical scheme of the object of the invention:
A nitric acid tail gas denitrating catalyst, is characterized in that: this catalyst be take activated alumina as carrier, and cupric oxide is active component, 2 kinds of MOx (metal oxide Fe
2o
3, MgO, Cr
2o
3, TiO
2, NiO, ZrO
2, V
2o
5, MoO
3, ZnO, CeO
2,, MnO
2or WO
3, x is 1,2,3 or 5) and be auxiliary agent, M is iron, chromium, nickel, vanadium, manganese, zinc, magnesium, titanium, zirconium, molybdenum, tungsten or cerium, catalyst quality percentage consists of: cupric oxide 1%～10%, the total amount of two kinds of MOx is 1%～25%, surplus is alumina support.
The preparation process of catalyst is as follows successively:
According to the mass percent of catalyst, form,
1), by the salt wiring solution-forming of described promoter metal;
2), by step 1) solution of gained adds in carrier, fully mixed to such an extent that flood the carrier of auxiliary agent thoroughly;
3), by step 2) the gained carrier that flooded auxiliary agent dries, 2 hours must be containing the carrier of auxiliary agent 250～600 ℃ of roastings;
4), to step 3) gained adds in the solution of cupric containing the carrier of auxiliary agent, fully mixed to such an extent that flood the catalyst of active component thoroughly;
5), by step 4) the gained catalyst that flooded active component in 120～250 ℃ dry 2～10 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst;
Before catalyst of the present invention is used, without activation, catalyst service condition is: normal pressure, 120～250 ℃ of reaction temperatures, air speed 5000～20000h
-1, import NO content 500～2000ppm, O
2content 1.0%～5.5%, ammonia nitrogen is than 1.0～1.2, and Balance Air is N
2.Reaction equation is as follows:
4NH
3+4NO+O
2→N
2+6H
2O (1)
4NH
3+2NO
2+O
2→3N
2+6H
2O (2)
8NH
3+6NO
2→7N
2+12H
2O (3)
Promoter metal salting liquid described in the present invention, the solution of cupric, except special instruction, all refer to the aqueous solution.
Feature of the present invention is:
1, catalyst of the present invention be take activated alumina as carrier, carrier specific area 200～380m
2/ g, profile is spherical, cylinder bar shaped, annular or cloverleaf pattern.
2, catalyst of the present invention be take cupric oxide as main active component, adds 2 kinds of MOx (metal oxide Fe
2o
3, MgO, Cr
2o
3, TiO
2, NiO, ZrO
2, V
2o
5, MoO
3, ZnO, CeO
2,, MnO
2or WO
3) be auxiliary agent, M is iron, chromium, nickel, vanadium, manganese, zinc, magnesium, titanium, zirconium, molybdenum, tungsten or cerium; X is 1,2,3 or 5.
3, the NOx conversion ratio of catalyst of the present invention is greater than 95%.
4, catalyst of the present invention is minimum can be 120 ℃ of uses.
5, the present invention be take the activated alumina of domestic technique maturation and is carrier, adopts infusion process preparation, and carrier wide material sources are reliable, and catalyst preparation process is simple, stable and reliable product quality.
The specific embodiment
Following embodiment 1-11 is catalyst preparation example of the present invention, and described embodiment is only for illustrating the present invention rather than for limiting the present invention.
Embodiment 1
1, take 10 grams of ferric nitrates and 10 grams of magnesium nitrates are dissolved in 40 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of spherical activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 360 ℃ constant 2 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 10 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 120 ℃ dry 5 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 3.2%CuO, 1.5%Fe
2o
3, 1.8%MgO, all the other are carrier A l
2o
3.
By this nitrogen temperature to 250 ℃ for catalyst, pass into volume and consist of NO 1000ppm, O
25.5%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 10000h
-1, carry out denitrification test, now NOx conversion ratio is 96.1%.
Embodiment 2
1, take 26 grams of chromic nitrates and 25 grams of titanium sulfates are dissolved in 35 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of spherical activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 250 ℃ constant 2 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 3 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 150 ℃ dry 10 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of 1.0%CuO, 4.4%Cr
2o
3, 4.7%TiO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 220 ℃ for catalyst, pass into volume and consist of NO 500ppm, O
22.5%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 20000h
-1, carry out denitrification test, now NOx conversion ratio is 96.8%.
Embodiment 3
1, take 2 grams of nickel nitrates and 1.4 grams of zirconium nitrates are dissolved in 65 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of spherical activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 600 ℃ constant 2 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 33 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 180 ℃ dry 3 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 10.0%CuO, 0.5%NiO, 0.5%ZrO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 240 ℃ for catalyst, pass into volume and consist of NO 800ppm, O
22.5%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 5000h
-1, carry out denitrification test, now NOx conversion ratio is 97.7%.
Embodiment 4
1, take 6.5 grams of ammonium metavanadates and 34 grams of ammonium molybdates are dissolved in 50 milliliter of 15% ammoniacal liquor, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of spherical activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 380 ℃ constant 2 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 10 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 190 ℃ dry 8 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 3.2%CuO, 3.8%V
2o
5, 21.2%MoO
3, all the other are carrier A l
2o
3.
By this nitrogen temperature to 250 ℃ for catalyst, pass into volume and consist of NO 800ppm, O
21.0%, ammonia nitrogen than 1.0, Balance Air is N
2unstripped gas, air speed 8000h
-1, carry out denitrification test, now NOx conversion ratio is 96.3%.
Embodiment 5
1, take 14 grams of manganese nitrates and 6 grams of molybdenum ammonium tungstates are dissolved in 55 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of spherical activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 500 ℃ constant 6 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 12 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 160 ℃ dry 3 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 3.8%CuO, 6.2%V
2o
5, 16.0%MoO
3, all the other are carrier A l
2o
3.
By this nitrogen temperature to 150 ℃ for catalyst, pass into volume and consist of NO 2000ppm, O
23.0%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 15000h
-1, carry out denitrification test, now NOx conversion ratio is 98.1%.
Embodiment 6
1, take 36 grams of zinc nitrates and 13 grams of cerous nitrates are dissolved in 50 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of spherical activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 400 ℃ constant 4 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 7 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 180 ℃ dry 2 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 2.2%CuO, 8.3%ZnO, 4.8%CeO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 230 ℃ for catalyst, pass into volume and consist of NO 1200ppm, O
25.0%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 7000h
-1, carry out denitrification test, now NOx conversion ratio is 95.4%.
Embodiment 7
1, take 24 grams of chromic nitrates and 20 grams of Titanium Nitrates are dissolved in 35 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of cylinder bar shaped activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 280 ℃ constant 7 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 15 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 160 ℃ dry 8 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of, 4.7%CuO, 4.0%Cr
2o
3, 4.8%TiO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 250 ℃ for catalyst, pass into volume and consist of NO 1250ppm, O
25.5%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 20000h
-1, carry out denitrification test, now NOx conversion ratio is 96.6%.
Embodiment 8
1, take 24 grams of chromic nitrates and 15 grams of Titanium Nitrates are dissolved in 40 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of annular activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 280 ℃ constant 7 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 15 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 200 ℃ dry 8 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 4.7%CuO, 4.0%Cr
2o
3, 3.7%TiO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 180 ℃ for catalyst, pass into volume and consist of NO 1250ppm, O
25.5%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 10000h
-1, carry out denitrification test, now NOx conversion ratio is 97.5%.
Embodiment 9
1, take 28 grams of chromic nitrates and 15 grams of Titanium Nitrates are dissolved in 40 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of cloverleaf pattern activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 330 ℃ constant 5 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 18 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 170 ℃ dry 3 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 5.6%CuO, 4.6%Cr
2o
3, 3.6%TiO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 170 ℃ for catalyst, pass into volume and consist of NO 1250ppm, O
25.5%, ammonia nitrogen than 1.0, Balance Air is N
2unstripped gas, air speed 10000h
-1, carry out denitrification test, now NOx conversion ratio is 95.9%.
Embodiment 10
1, take 15 grams of ferric nitrates and 20 grams of manganese nitrates are dissolved in 30 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of cylinder bar shaped activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 360 ℃ constant 2 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 15 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 150 ℃ dry 5 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 4.7%CuO, 1.6%Fe
2o
3, 6.2%MnO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 120 ℃ for catalyst, pass into volume and consist of NO 1000ppm, O
25.5%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 10000h
-1, carry out denitrification test, now NOx conversion ratio is 95.5%.
Embodiment 11
1, take 15 grams of manganese nitrates and 10 grams of cerous nitrates are dissolved in 38 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of cloverleaf pattern activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 380 ℃ constant 5 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 18 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 220 ℃ dry 6 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 5.6%CuO, 4.5%MnO
2, 3.6%CeO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 120 ℃ for catalyst, pass into volume and consist of NO1250ppm, O
24.0%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 12000h
-1, carry out denitrification test, now NOx conversion ratio is 95.7%.
Embodiment 12
1, take 26 grams of chromic nitrates and 25 grams of titanium sulfates are dissolved in 35 ml waters, obtain compounding agent solution;
2, in above-mentioned compounding agent solution, add 100 grams of spherical activated aluminas, fully mix thoroughly, must flood the carrier of auxiliary agent;
3, the above-mentioned carrier that has flooded auxiliary agent is dried, be then warming up to 250 ℃ constant 2 hours, naturally cool to room temperature and obtain the carrier containing auxiliary agent;
4, the above-mentioned carrier containing auxiliary agent is added in 50 grams of solution that 3 grams of copper nitrates are made into, fully mix and obtain the catalyst that has flooded active component thoroughly;
5, by the above-mentioned catalyst that has flooded active component in 250 ℃ dry 10 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst.
Gained catalyst quality percentage consists of: 1.0%CuO, 4.4%Cr
2o
3, 4.6%TiO
2, all the other are carrier A l
2o
3.
By this nitrogen temperature to 380 ℃ for catalyst, pass into volume and consist of NO 5000ppm, O
22.5%, ammonia nitrogen than 1.2, Balance Air is N
2unstripped gas, air speed 20000h
-1, carry out denitrification test, now NOx conversion ratio is 98.9%.
Claims (2)
1. a nitric acid tail gas denitrating catalyst, it is characterized in that: this catalyst be take activated alumina as carrier, cupric oxide is active component, 2 kinds of MOx are auxiliary agent, M is iron, chromium, nickel, vanadium, manganese, zinc, magnesium, titanium, zirconium, molybdenum, tungsten or cerium, catalyst quality percentage consists of: cupric oxide 1%～10%, the total amount of two kinds of MOx auxiliary agents is 1%～25%, surplus is alumina support, it makes in accordance with the following methods: according to the mass percent of catalyst, form 1), by promoter metal salt wiring solution-forming; 2), the solution of step 1) gained is added in active aluminum oxide carrier, fully mixed to such an extent that flood the carrier of auxiliary agent thoroughly; 3), by step 2) the gained carrier that flooded auxiliary agent dries, 2 hours must be containing the carrier of auxiliary agent 250～600 ℃ of roastings; 4), to step 3) gained, containing the carrier of auxiliary agent, add in the solution of cupric, fully mixed to such an extent that flood the catalyst of active component thoroughly; 5), the catalyst that step 4) gained flooded to active component in 120～250 ℃ dry 2～10 hours, naturally cool to room temperature and obtain nitric acid tail gas denitrating catalyst; Wherein said active aluminum oxide carrier specific area 200～380m
2/ g, profile is spherical, cylinder bar shaped, annular or cloverleaf pattern.
2. by the application of a kind of nitric acid tail gas denitrating catalyst claimed in claim 1, it is characterized in that: catalyst service condition is: normal pressure, 120～380 ℃ of reaction temperatures, air speed 5000～20000h
-1, import NO content 500～5000ppm, O
2content 1.0～5.5%, ammonia nitrogen is than 1.0～1.2, and Balance Air is N
2.
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| CN105032391A (en) * | 2015-06-24 | 2015-11-11 | 方耀 | Catalyst promoter for ammonia gas reduction denitration of coal-fired flue gas |
| CN104971592A (en) * | 2015-06-24 | 2015-10-14 | 方耀 | Method for removing nitrogen oxides of coal-fired flue gas |
| CN104984660A (en) * | 2015-06-24 | 2015-10-21 | 方耀 | Coal-fired flue gas pollutant treatment method |
| CN104984659A (en) * | 2015-06-24 | 2015-10-21 | 方耀 | Coal-fired flue gas denitrification method |
| CN106000420B (en) * | 2016-06-03 | 2019-04-26 | 华烁科技股份有限公司 | One removing N2O and NOxCatalyst and preparation method thereof |
| CN106492804B (en) * | 2016-11-29 | 2019-02-15 | 西安元创化工科技股份有限公司 | A kind of SCR method treatment of nitric acid tail gas denitrating catalyst |
| CN106807346A (en) * | 2016-12-30 | 2017-06-09 | 洛阳中超新材料股份有限公司 | A kind of denitration catalyst carrier and preparation method thereof and denitrating catalyst |
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| CN108435159B (en) * | 2018-04-24 | 2021-06-04 | 北京航空航天大学 | Denitration catalyst for improving arsenic poisoning resistance and preparation method and application thereof |
| CN110856818B (en) * | 2018-08-22 | 2022-10-25 | 上海浦景化工技术股份有限公司 | Catalyst for reduction and conversion of dilute nitric acid and preparation method and application thereof |
| CN110280263A (en) * | 2019-06-26 | 2019-09-27 | 中国科学院山西煤炭化学研究所 | The alumina load manganese Raney nickel of removing flue gas nitrogen oxide and preparation and application |
| CN114054031B (en) * | 2021-11-03 | 2023-08-11 | 中国石油大学(华东) | Catalyst for producing glycollic acid by catalytic oxidation of polyalcohol and preparation method thereof |
| CN116688934A (en) * | 2023-05-30 | 2023-09-05 | 浙江浙能技术研究院有限公司 | Efficient wet denitration adsorbent and application method thereof |
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