CN105214670A - The preparation being low temperature support type denitrating catalyst in carrier with former iron ore and method of testing - Google Patents
The preparation being low temperature support type denitrating catalyst in carrier with former iron ore and method of testing Download PDFInfo
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- CN105214670A CN105214670A CN201510660789.8A CN201510660789A CN105214670A CN 105214670 A CN105214670 A CN 105214670A CN 201510660789 A CN201510660789 A CN 201510660789A CN 105214670 A CN105214670 A CN 105214670A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000003054 catalyst Substances 0.000 title claims abstract description 61
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000010998 test method Methods 0.000 title claims abstract description 6
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical group [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 15
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 4
- 238000006555 catalytic reaction Methods 0.000 abstract description 2
- 230000002153 concerted effect Effects 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 230000003197 catalytic effect Effects 0.000 description 13
- 239000011149 active material Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 229910052595 hematite Inorganic materials 0.000 description 4
- 239000011019 hematite Substances 0.000 description 4
- 229910052684 Cerium Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910002328 LaMnO3 Inorganic materials 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of with former iron ore be low temperature support type denitrating catalyst in carrier preparation and method of testing, this preparation method adopts citric acid complex method, be by perovskite supported for active component on carrier, make full use of the modulation of carrier microenvironment, to realizing the concerted catalysis in carrier and perovskite activated centre, simultaneously by the interaction between perovskite and high surface area carrier, to strengthen the hydrothermal stability of multiplex catalyst, anti-caking power etc.The invention provides the Catalysts and its preparation method that a kind of material source is extensive, cheap.
Description
Technical field
The present invention relates to a kind of general carrier of catalyst, be specifically related to a kind of preparations and applicatio be carrier loaded perovskite etc. being catalytic reactive component agent with former iron ore.
Background technology
Nitrogen oxide (NOx) is one of main atmosphere pollution, is mainly derived from the flue gas, motor-vehicle tail-gas etc. of thermal power plant discharge, is the main matter forming acid rain and photochemical fog, can causes serious destruction to environment.Therefore, countries in the world particularly developed country have strict restriction to its discharge.The emission control of NOx comprises Combustion Process Control and rear denitrating flue gas two aspect of burning.Wherein selective catalytic reduction (SCR) is current most widely used gas denitrifying technology, the core that preparation temperature window is wide, active high and selective strong catalyst is this technology.
The denitration commercial catalysts V of domestic current use
2o
5-WO
3/ TiO
2, its NOx removal efficiency better (350-400 DEG C), has anti-S.But alum series catalysts exists that operating temperature is high, active window is narrow, before catalyst-assembly is generally placed in deduster, desulfurizing tower, easily there is blocking, the problem such as poisoning, high temperature section N
2the generation of O and SO
2to SO
3the problems such as conversion, and V
2o
5containing bio-toxicity.Therefore, the process of waste catalyst also can increase its operation cost.
In order to overcome above-mentioned drawback, develop the multiple support type denitrating catalyst being carrier with molecular sieve and active carbon.Mainly make use of the characteristics such as the high-ratio surface sum porous of carrier, the effect of the active material of load on it is fully played, but itself does not possess catalytic denitration function substantially.So the low-temperature catalytic activity of current loaded catalyst is still not high enough.
Summary of the invention
Goal of the invention: the present invention is directed to the deficiencies in the prior art, thering is provided a kind of is carrier loaded perovskite etc. for the preparation method of catalytic reactive component agent with former iron ore (limonite, bloodstone), citric acid complex method is have employed in preparation process, the catalytic denitration effect of the active material of the load except giving full play to, also can by the catalytic denitration effect of the former iron ore (limonite, bloodstone) as carrier.The problems such as change support type denitration catalyst carrier in the past and do not possess the drawback of catalytic denitration function, the active temperature windows improving existing catalyst is narrow, low temperature active difference.There is the advantages such as specific area is large, porosity high and low temperature catalytic activity is high, resistance to SO_2 is better.
Technical scheme: for solving the problems of the technologies described above, provided by the invention with the preparation method of former iron ore for low temperature support type denitrating catalyst in carrier, comprise the following steps:
Step 1, filters out 35 ~ 65 object iron ore particles after being pulverized by iron ore,
Step 2, carries out the pre-heat treatment by described iron ore particle at 350 DEG C ~ 380 DEG C, obtains iron ore carrier;
Step 3, obtained aqueous solution, wherein La(NO
3)
3nH
2o0.8mol/L, Mn(NO
3)
20.8mol/L, C
6h
8o
76H
2o1.6mol/L;
Step 4, drops into iron ore carrier in the aqueous solution, carries out water bath with thermostatic control agitating heating until by solvent evaporated away, obtain gel to it;
Step 5, transfers to gel in baking oven, carries out 48h freeze-day with constant temperature, obtain xerogel at 110 DEG C;
Step 6, xerogel is lighted by instillation absolute ethyl alcohol, the mixture of gained after burning is placed in Muffle furnace through 500 DEG C ~ 700 DEG C calcining 3h, finally calcined product is filtered out 35 ~ 65 object loaded catalyst LaMnO
3iron ore.
Particularly, described iron ore is bloodstone or limonite.
Particularly, described step 3 uses constant temperature magnetite agitator obtained aqueous solution, and heats 0.5h the stirred in water bath of 30 DEG C.
The present invention provides the denitration efficiency method of testing of above-mentioned catalyst simultaneously, comprises the following steps:
Step 1, measures 10ml catalyst and is seated in fixed bed reactors;
Step 2, simulated flue gas is: NO=500ppm, n (NH
3)=500ppm, φ (O
2)=3%, uses N
2for balanced gas;
Step 3, maintaining gas overall flow rate in reaction is 1.5L/min, and reaction velocity is 9000h
-1, reaction temperature: 90 DEG C, 120 DEG C, 150 DEG C, 180 DEG C, 210 DEG C, 240 DEG C, 270 DEG C, 300 DEG C, 330 DEG C, at the denitration performance of these 9 temperature spot detecting catalysts
During use, first bloodstone, limonite are pulverized, then filter out 35 ~ 65 object iron ore particles, then it is carried out the pre-heat treatment at 320 DEG C (350 DEG C, 380 DEG C) respectively, thus obtain bloodstone, limonite carrier, take 0.04molLa(NO simultaneously
3)
3nH
2o, 0.04molMn(NO
3)
2,0.08molC
6h
8o
76H
2o, successively put into the beaker measuring 50ml deionized water, after being pressed the good solution of proportions of 1:1:2, be placed on constant temperature magnetite agitator, first at the stirred in water bath heating 0.5h of 30 DEG C, take acquired bloodstone (limonite) carrier 24.2g(38.72g above again, 32.26g, 27.66g) put in the middle of the solution just prepared, again constant temperature magnetite agitator temperature is adjusted to 80 DEG C and carries out water bath with thermostatic control agitating heating until by solvent evaporated away, obtain a kind of gel, transferred to again in baking oven, 48h freeze-day with constant temperature is carried out at 110 DEG C, become xerogel, instill a small amount of absolute ethyl alcohol again, xerogel is lighted, again the mixture of gained is placed in Muffle furnace through 600 DEG C (500 DEG C, 700 DEG C) calcining 3h, again sample is screened, obtain 35 ~ 65 orders and namely obtain loaded catalyst LaMnO
3/ red (brown) iron ore.Using such method can prepare La equally
0.9ce
0.1mnO
3/ red (brown) iron ore, La
0.9co
0.1mnO
3the catalyst such as/red (brown) iron ore.
The chemical reagent that catalyst preparing adopts has La(NO
3)
3nH
2o (analyzing pure), mass fraction are 50%Mn (NO
3)
2solution, Citric Acid Mono C
6h
8o
76H
2o (analyzing pure), Ce(NO
3)
36H
2o (analyzing pure), Co(NO
3)
36H
2o (analyzing pure), anhydrously there are ethanol, bloodstone and limonite etc.
Beneficial effect:
1. take iron ore as carrier, ferriferous oxide inherently has certain catalytic activity, and iron ore is cheap, and source is wide, is conducive to exploitation industrialization SCR catalyst;
2. perovskite has stronger high high-temp stability, Strong oxdiative reducing power, variety diversity, high purifying exhaust air ability;
3. by perovskite supported for active component on carrier, make full use of the modulation of carrier microenvironment, to realizing the concerted catalysis in carrier and perovskite activated centre, simultaneously by the interaction between perovskite and high surface area carrier, to strengthen the hydrothermal stability of multiplex catalyst, anti-caking power etc.;
4. denitrating catalyst provided by the invention has wider temperature window, and low temperature active is higher, after denitration unit can be placed in desulfurization and dedusting unit, can reduce flue dust, heavy metal, sulfur dioxide to the toxic and side effect of catalyst.
Except technical problem, the technical characteristic forming technical scheme and the advantage brought by the technical characteristic of these technical schemes that the present invention recited above solves, the advantage that the other technologies feature comprised in the other technologies problem that be low temperature support type denitrating catalyst in carrier with former iron ore preparation and method of testing of the present invention can solve, technical scheme and these technical characteristics bring, will be described in more detail by reference to the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is different loads amount LaMnO3/ hematite catalyst denitration efficiency;
Fig. 2 adds micro-Ce, Co to the impact of denitration performance;
Fig. 3 is the impact of different carriers on denitration performance.
Detailed description of the invention
Embodiment 1:
Active material load capacity is 40%LaMnO
3the low-temperature denitration catalyst preparation method step of/bloodstone is as follows:
First by bloodstone mechanical crushing, then filter out 35 ~ 65 object iron ore particles, then it is carried out the pre-heat treatment at 320 DEG C, thus obtain bloodstone carrier, take 0.04molLa(NO simultaneously
3)
3nH
2o, 0.04molMn(NO
3)
2,0.08molC
6h
8o
76H
2o, successively put into the beaker measuring 50ml deionized water, after being pressed the good solution of proportions of 1:1:2, be placed on constant temperature magnetite agitator, first at the stirred in water bath heating 0.5h of 30 DEG C, take acquired bloodstone (limonite) carrier 24.2g above again, put in the middle of the solution that just prepared, again constant temperature magnetite agitator temperature is adjusted to 80 DEG C and carries out water bath with thermostatic control agitating heating until by solvent evaporated away, obtain a kind of gel, transferred to again in baking oven, 48h freeze-day with constant temperature is carried out at 110 DEG C, become xerogel, instill a small amount of absolute ethyl alcohol again, xerogel is lighted, again the mixture of gained is placed in Muffle furnace through 600 DEG C of calcining 3h, again sample is screened, obtain 35 ~ 65 orders and namely obtain loaded catalyst LaMnO
3/ bloodstone, its active component load capacity is 40%.
Embodiment 2:
Implementation step is as example 1, and other conditions are constant, and changing carrier bloodstone amount is 27.66g, and obtained active material load capacity is 35%LaMnO
3/ hematite catalyst.
Embodiment 3:
Implementation step is as example 1, and other conditions are constant, and changing carrier bloodstone amount is 32.26g, and obtained active material load capacity is 30%LaMnO
3/ hematite catalyst.
Embodiment 4:
Implementation step is as example 1, and other conditions are constant, and changing carrier bloodstone amount is 3g, and obtained active material load capacity is 25%LaMnO
3/ hematite catalyst.
Embodiment 5:
Only by bloodstone mechanical crushing, then filter out 35 ~ 65 object iron ore particles, then it is carried out the pre-heat treatment at 320 DEG C, study single bloodstone catalytic activity.
The catalyst denitration activity experiment of above-described embodiment is as follows:
Denitration efficiency test is by obtained catalyst, measures 10ml, and be seated in stainless steel fixed bed reactors that internal diameter is 2cm, when taking NH3 as reducing gas, simulated flue gas is: NO=500ppm, n (NH
3)=500ppm, φ (O
2)=3%, N
2for balanced gas, maintaining gas overall flow rate in reaction is 1.5L/min, and reaction velocity is 9000h
-1.Reaction temperature: 90 DEG C, 120 DEG C, 150 DEG C, 180 DEG C, 210 DEG C, 240 DEG C, 270 DEG C, 300 DEG C, 330 DEG C, at the denitration performance of these 9 temperature spot detecting catalysts.As shown in Figure 1, catalyst NOx conversion rate prepared by the present invention reaches as high as more than 98% to the denitration efficiency obtained different temperatures.
In general, the catalytic activity of the catalyst of load active material LaMnO3 improves significantly, and especially denitration is to low temperature direction translation 90 DEG C, as 0%LaMnO
3catalytic activity reach maximum-denitration efficiency at 270 DEG C and be approximately 80%, load 40%LaMnO
3catalyst 150 DEG C time, denitration efficiency just reaches 80%.25%LaMnO
3, 30%LaMnO
3with 35%LaMnO
3catalytic activity maximum 210 DEG C time; 40%LaMnO
3maximum 180 DEG C time, and at 180 DEG C ~ 240 DEG C, denitration efficiency keeps stable, and when being less than 180 DEG C, denitration efficiency is apparently higher than other several catalyst.And can with LaMnO from figure
3the increase of load capacity, the active window open temp of catalyst reduces, and along with LaMnO
3the increase of load capacity, the low temperature active of catalyst also significantly improves.
Embodiment 6:
Implementation step is as example 1, and other conditions are constant, with the addition of micro-Ce, wherein mol ratio (La+Ce): Mn:C
6h
8o
76H
2o=1:1:1; La:Ce=9:1.
Embodiment 7:
Implementation step is as example 1, and other conditions are constant, with the addition of micro-Co, wherein mol ratio (La+Co): Mn:C
6h
8o
76H
2o=1:1:1; La:Co=9:1.
The catalyst denitration activity experiment of above-described embodiment is as follows:
In order to again improve catalyst denitration performance, adding micro-Ce, Co and obtaining catalyst La
0.9ce
0.1mnO
3/ bloodstone, La
0.9co
0.1mnO
3/ bloodstone, and carry out denitration activity experiment, measures 10ml catalyst, and be seated in stainless steel fixed bed reactors that internal diameter is 2cm, when taking NH3 as reducing gas, simulated flue gas is: NO=500ppm, n (NH
3)=500ppm, φ (O
2)=3%, N
2for balanced gas, maintaining gas overall flow rate in reaction is 1.5L/min, and reaction velocity is 9000h
-1.Reaction temperature: 90 DEG C, 120 DEG C, 150 DEG C, 180 DEG C, 210 DEG C, 240 DEG C, 270 DEG C, 300 DEG C, 330 DEG C, at the denitration performance of these 9 temperature spot detecting catalysts.Fig. 2 is done to the denitration efficiency that different temperatures obtains, as shown in Figure 2, the interpolation of Ce and Co all reduces catalyst and reaches reaction temperature needed for the highest denitration efficiency, but when being less than 180 DEG C, the interpolation of Ce also greatly increase the denitration effect of catalyst and the interpolation of Co does not have clear improvement denitration effect.Especially Ce trace element be added on 150 DEG C ~ 300 DEG C these temperature ranges, denitration efficiency reaches more than 80%.
Embodiment 8:
Implementation step is as example 1, and other conditions are constant, and carrier changes limonite into by bloodstone.The experiment of catalyst denitration activity is as follows:
Measure 10ml catalyst, be seated in stainless steel fixed bed reactors that internal diameter is 2cm, when taking NH3 as reducing gas, simulated flue gas is: NO=500ppm, n (NH
3)=500ppm, φ (O
2)=3%, N
2for balanced gas, maintaining gas overall flow rate in reaction is 1.5L/min, and reaction velocity is 9000h
-1.Reaction temperature: 90 DEG C, 120 DEG C, 150 DEG C, 180 DEG C, 210 DEG C, 240 DEG C, 270 DEG C, 300 DEG C, 330 DEG C, at the denitration performance of these 9 temperature spot detecting catalysts, and tests with the catalyst denitration activity taking bloodstone as carrier and compares.
The denitration efficiency that different temperatures obtains is as shown in figure Fig. 3, and in figure, sample a is LaMnO
3/ bloodstone; Sample b is La
0.9ce
0.1mnO
3/ bloodstone; Sample c is LaMnO
3/ limonite; Sample d is La
0.9ce
0.1mnO
3/ limonite.By making comparisons to sample a and sample c, sample b and sample d, can draw with bloodstone to be the sample that carrier obtains, no matter whether add trace element, the catalytic activity that the catalytic activity of this sample is compared in the catalyst taking limonite as carrier is good, and especially bloodstone is that the sample activity temperature window that carrier obtains is wide.
Below by reference to the accompanying drawings embodiments of the present invention are described in detail, but the present invention is not limited to described embodiment.For those of ordinary skill in the art, in the scope of principle of the present invention and technological thought, multiple change, amendment, replacement and distortion are carried out to these embodiments and still falls within the scope of protection of the present invention.
Claims (4)
1., with the preparation method of former iron ore for low temperature support type denitrating catalyst in carrier, it is characterized in that comprising the following steps:
Step 1, filters out 35 ~ 65 object iron ore particles after being pulverized by iron ore;
Step 2, carries out the pre-heat treatment by described iron ore particle at 350 DEG C ~ 380 DEG C, obtains iron ore carrier;
Step 3, obtained aqueous solution, wherein La(NO
3)
3nH
2o0.8mol/L, Mn(NO
3)
20.8mol/L, C
6h
8o
76H
2o1.6mol/L;
Step 4, drops into iron ore carrier in the aqueous solution, carries out water bath with thermostatic control agitating heating until by solvent evaporated away, obtain gel to it;
Step 5, transfers to gel in baking oven, carries out 48h freeze-day with constant temperature, obtain xerogel at 110 DEG C;
Step 6, xerogel is lighted by instillation absolute ethyl alcohol, the mixture of gained after burning is placed in Muffle furnace through 500 DEG C ~ 700 DEG C calcining 3h, finally calcined product is filtered out 35 ~ 65 object loaded catalyst LaMnO
3iron ore.
2. according to claim 1 with the preparation method of former iron ore for low temperature support type denitrating catalyst in carrier, it is characterized in that: described iron ore is bloodstone or limonite.
3. according to claim 1 with the preparation method of former iron ore for low temperature support type denitrating catalyst in carrier, it is characterized in that: described step 3 uses constant temperature magnetite agitator obtained aqueous solution, and heat 0.5h the stirred in water bath of 30 DEG C.
4. according to claim 1 with the denitration efficiency method of testing of former iron ore for low temperature support type denitrating catalyst in carrier, it is characterized in that comprising the following steps:
Step 1, measures 10ml catalyst and is seated in fixed bed reactors;
Step 2, simulated flue gas is: NO=500ppm, n (NH
3)=500ppm, φ (O
2)=3%, uses N
2for balanced gas;
Step 3, maintaining gas overall flow rate in reaction is 1.5L/min, and reaction velocity is 9000h
-1, reaction temperature: 90 DEG C, 120 DEG C, 150 DEG C, 180 DEG C, 210 DEG C, 240 DEG C, 270 DEG C, 300 DEG C, 330 DEG C, at the denitration performance of these 9 temperature spot detecting catalysts.
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Cited By (8)
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| CN106552643A (en) * | 2016-11-17 | 2017-04-05 | 东南大学 | It is a kind of that there is high resistance to SO_2 iron ore denitrating catalyst and its preparation method and application |
| CN107008291A (en) * | 2017-04-21 | 2017-08-04 | 北京国电龙源环保工程有限公司 | Catalyst for denitrating flue gas and preparation method thereof |
| CN108837839A (en) * | 2018-05-03 | 2018-11-20 | 东南大学 | A kind of low temperature sheet SCR denitration and its SPS tabletting preparation method and application |
| CN113578303A (en) * | 2021-08-03 | 2021-11-02 | 安徽元琛环保科技股份有限公司 | Preparation method of SCR denitration catalyst with ultralow vanadium load by taking perovskite type composite oxide as carrier and prepared catalyst |
| CN113952982A (en) * | 2021-11-05 | 2022-01-21 | 安徽元琛环保科技股份有限公司 | Manganese-based ultralow-temperature denitration catalyst and preparation method thereof |
| CN114768822A (en) * | 2022-05-06 | 2022-07-22 | 合肥工业大学 | Preparation method of environment-friendly and resource-saving efficient low-temperature denitration catalyst |
| CN114984974A (en) * | 2022-06-10 | 2022-09-02 | 常州大学 | Method for improving low-temperature SCR denitration performance of natural ferro-manganese ore catalyst |
| CN116020473A (en) * | 2023-01-06 | 2023-04-28 | 广东工业大学 | Catalyst for degrading atrazine by activating peroxymonosulfate, and preparation method and application thereof |
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|---|---|---|---|---|
| CN104307533A (en) * | 2014-10-14 | 2015-01-28 | 东南大学 | Application of natural spathic iron in preparation of SCR denitration catalyst |
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