CN104941659A - Method for preparing carbon nano-tube denitration catalyst with composite hierarchical structure - Google Patents
Method for preparing carbon nano-tube denitration catalyst with composite hierarchical structure Download PDFInfo
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Abstract
The method relates to a method for preparing a carbon nano-tube denitration catalyst with a composite hierarchical structure and belongs to the field of environmental protection catalytic materials. The method comprises adding a multi-walled carbon nanotube in a mass ratio of (0.5-20):1 with potassium permanganate to a potassium permanganate solution, performing ultrasonic dispersion, using acetic acid to adjust the pH to 1-4, warning the mixed solution to 60-90 DEG C with stirring to perform backflow, reacting for 2-5 h and then washing a product through deionized water; after the drying, adding an obtained manganese dioxide-carbon nano-tube compound to deionized water, performing ultrasonic dispersion, adding a certain amount of bivalent metal salt in the solution, warming the mixed solution with stirring, carrying out surface replacement reaction, using deionized water to wash the product, and obtaining the carbon nano-tube denitration catalyst with the composite hierarchical structure after the drying. The catalyst has good efficiency of converting nitrogen oxides in flue gas. The catalyst can be applied to treatment of the nitrogen oxides in the flue gas emitted by fixed sources such as steel mills and coal-fired power plants.
Description
Technical field
The present invention relates to a kind of carbon nano tube denitration catalyst with composite bed level structure, belong to purification of nitrogen oxides technical field in environmental protection, this catalyst can be used for the nitrogen oxide removing stationary source discharge.
Background technology
Along with the development and progress of science and technology, the mankind progressively improve the dependence of the energy and demand, and this also result in day by day serious nitrogen oxide (NO
x) emission problem.The nitrogen oxide of excessive emissions not only destroys ball ecological environment, also can cause significant damage to human health.Ammonia selective reduction (NH
3-SCR) be the NO that application is the widest at most at present
xremoving sulfuldioxide, wherein V
2o
5-WO
3/ TiO
2catalyst is the denitrating catalyst of main input commercial applications at present.But it is higher to there is catalytic activity temperature, SO2 → SO3 oxidation easily occurs, the shortcomings such as the bio-toxicity of V species is larger, therefore, development of new denitrating catalyst is the vital task of current catalytic denitration research.
Due to Mn oxide (MnO
x) special characteristic of appraising at the current rate, it has good low-temperature denitration catalytic performance, and becomes the study hotspot of low temperature catalyst of new generation.In the middle of nearest research work, in Chinese patent CN104475087 A, be referred to a kind of manganese-based catalyst with sea urchin shape structure, and 150
oc ~ 250
othere is under the condition of C the catalyzed conversion speed of > 80%.But in the middle of actual flue gas, often there is a certain amount of sulfur dioxide, and Mn oxide characteristic that is easy and sulfur dioxide reacting generating salt can cause surface-active site sharply to be reduced, thus causing the inactivation of catalyst, this defect significantly limit manganese-based catalyst applying in the middle of actual industrial catalytic reaction.
Summary of the invention
The present invention be directed to the deficiency of existing denitrating catalyst, propose a kind of preparation method with the carbon nano tube denitration catalyst of composite bed level structure, denitrating catalyst environmental protection prepared by the method, at low temperatures namely there is good catalytic activity, and by the surface modification of Multimetal oxide, effectively overcome the defect that poisoning and deactivation easily occurs manganese-based catalyst under sulfur-bearing condition.
Have a preparation method for the carbon nano tube denitration catalyst of composite bed level structure, the method comprises following processing step:
A. the preparation of manganese dioxide-composite structure of carbon nano tube: configuration concentration is 1 × 10
-3~ 5 × 10
-2the liquor potassic permanganate of mol/L, by being 20 ~ 0.5:1 with potassium permanganate mass ratio, multi-walled carbon nano-tubes adds in liquor potassic permanganate subsequently, ultrasonic disperse 0.2 ~ 1h, after Solution Dispersion to be mixed is even, with acetic acid adjust ph to 1 ~ 4, subsequently mixed solution is warming up to 60 ~ 90 under strong stirring condition
oc refluxes, and is washed by product, can obtain manganese dioxide-carbon mano-tube composite after oven dry after reaction 2 ~ 5h by deionized water.
The preparation of B. metal oxide-manganese dioxide-CNT composite bed level structure denitrating catalyst: the manganese dioxide-carbon mano-tube composite that has prepared in steps A is added in deionized water, ultrasonic disperse 0.2 ~ 1h, after product is uniformly dispersed, adding in the solution with prepared product quality ratio in steps A is the specific divalent metal salt of 0.05 ~ 0.5:1, subsequently mixed solution is warming up to 50 ~ 80 under strong stirring condition
oc carries out surface replacement reaction, after reaction 0.5 ~ 3h, product is spent deionized water, can obtain and have metal oxide-manganese dioxide-CNT composite bed level structure denitrating catalyst after oven dry.
The carbon nano tube denitration catalyst with composite bed level structure of the present invention, the formation of this structure mainly make use of the reaction between CNT and potassium permanganate: 4MnO
4-+ 3C+H
2o → 4MnO
2+ CO
3 2-+ 2HCO
3-; 4MnO
4-+ 2 H
2o → 4MnO
2+ 4OH
-+ 3O
2; And the electrochemical displacement between surperficial tetravalent manganese and specific divalent metal salting liquid reacts: Mn
4++ 2X
2+(X is special metal ion) → 2X
3++ Mn
2+.Denitrating catalyst prepared by the method has the composite bed level structure of metal oxide-Mn oxide-CNT; In the middle of surface active composition, the ratio between metal oxide-Mn oxide can regulate and control in preparation process.
In step, reaction pH value is 1 ~ 4, and acidity can cause too by force reaction too fast, and cannot form uniform manganese dioxide-composite structure of carbon nano tube, acidity is too weak, and reaction can be caused to carry out slowly.
In step, liquor potassic permanganate concentration is 1 × 10
-3~ 5 × 10
-2mol/L, concentration is too high or too low all cannot form uniform manganese dioxide-composite structure of carbon nano tube.
In step, potassium permanganate: the quality of CNT at 20 ~ 0.5:1, can obtain overall homogeneous manganese dioxide-composite structure of carbon nano tube than scope control.
In step, reflux temperature is 60 ~ 90
oc, the reflux temperature exceeding this scope can cause generating uniform manganese dioxide-composite structure of carbon nano tube.
In stepb, the specific divalent metal salt of selection is frerrous chloride, ferrous sulfate, cobalt chloride, the one in nickel chloride.
In stepb, the specific divalent metal salt adopted and the mass ratio of steps A product are 0.05 ~ 0.5:1, adopt too low divalent metal salt quality, electrochemical displacement can be caused to react imperfect, adopt too high quality, then can cause the waste of reactant.
In stepb, reaction temperature is 50 ~ 80
oc, the reaction temperature exceeding this scope can cause that reaction is uneven or the reaction time is long, is unfavorable for the preparation of above-mentioned compound level denitrating catalyst.
Compared with prior art, its advantage is as follows in the present invention:
(1) this catalyst uses CNT, and potassium permanganate and specific divalent metal salt are prepared, and have environmental protection, feature with low cost compared to traditional V-W-Ti catalyst.
(2) by preparing the design of level composite construction, this catalyst has lower active temperature and larger active window, and this catalyst has good sulfur resistance, therefore, the process of the nitrogen oxide in the flue gas of the stationary sources such as this catalyst can be applicable to steel mill, coal-burning power plant discharge.
Accompanying drawing explanation
Fig. 1. the transmission electron microscope picture obtained for the embodiment of the present invention one and XRD figure.
Fig. 2. be the catalytic activity curve with composite bed level structure carbon nano tube denitration catalyst that the embodiment of the present invention one obtains.
Fig. 3. be the sulfur resistance with composite bed level structure carbon nano tube denitration catalyst that the embodiment of the present invention one obtains.
Detailed description of the invention
In order to be illustrated more clearly in the present invention, enumerate following examples, but the enforceable situation of the present invention is not limited in the scope of embodiment.
Embodiment one:
Configuration concentration is 1 × 10
-3the liquor potassic permanganate of mol/L, by being 10:1 with potassium permanganate mass ratio, multi-walled carbon nano-tubes adds in liquor potassic permanganate subsequently, ultrasonic disperse 0.2h, Solution Dispersion to be mixed evenly after, by acetic acid adjust ph to 1, subsequently mixed solution is warming up to 60 under strong stirring condition
oc refluxes, and is washed by product, can obtain manganese dioxide-carbon mano-tube composite after oven dry after reaction 2h by deionized water.
Prepared manganese dioxide-the carbon mano-tube composite that has is added in deionized water, ultrasonic disperse 0.2h, after product is uniformly dispersed, adding with manganese dioxide-carbon mano-tube composite mass ratio is in the solution the frerrous chloride of 0.05:1, subsequently mixed solution is warming up to 60 under strong stirring condition
oc carries out surface replacement, is washed by product, can obtain and have iron oxide-manganese dioxide-CNT composite bed level structure denitrating catalyst (see figure 1) after oven dry after reaction 0.5h by deionized water.
Test the catalytic activity of above-mentioned catalyst: the catalyst prepared is put into fixed bed quartz tube reactor and carries out active testing, in reaction temperature 90 ~ 330
oc, air speed is 20000 h
-1condition under, 140 ~ 300
othe removal of nitrogen oxide rate (see figure 2) of 83 more than % all can be kept between C.Simulated flue gas is by N
2, O
2, NO and NH
3composition, wherein NO/NH
3=1:1, volumetric concentration is 500 ppm, O
2concentration is 5 %, and Balance Air is nitrogen.
Test the sulfur resistance of above-mentioned catalyst: the catalyst prepared is put into fixed bed quartz tube reactor and carries out active testing, in reaction temperature 200
oc, sulfur dioxide concentration is at 200 ppm, and air speed is 20000 h
-1condition under, the catalytic activity (see figure 3) of more than 91% can be kept in the test process of 4h, and closedown sulfur dioxide after, activity can return to 93%.
Embodiment two:
Configuration concentration is 5 × 10
-3the liquor potassic permanganate of mol/L, subsequently the multi-walled carbon nano-tubes in potassium permanganate mass ratio being 15:1 is added in liquor potassic permanganate, ultrasonic disperse 0.4h, after Solution Dispersion to be mixed is even, by acetic acid adjust ph to 1.5, subsequently mixed solution is warming up to 70 under strong stirring condition
oc refluxes, and is washed by product, can obtain manganese dioxide-carbon mano-tube composite after oven dry after reaction 3h by deionized water.
Prepared manganese dioxide-the carbon mano-tube composite that has is added in deionized water, ultrasonic disperse 0.4h, after product is uniformly dispersed, adding with manganese dioxide-carbon mano-tube composite mass ratio is in the solution the ferrous sulfate of 0.1:1, subsequently mixed solution is warming up to 60 under strong stirring condition
oc carries out surface replacement, is washed by product, can obtain and have iron oxide-manganese dioxide-CNT composite bed level structure denitrating catalyst after oven dry after reaction 1h by deionized water.
Test the catalytic activity of above-mentioned catalyst: the catalyst prepared is put into fixed bed quartz tube reactor and carries out active testing, in reaction temperature 90 ~ 330
oc, air speed is 20000 h
-1condition under, 150 ~ 320
othe removal of nitrogen oxide rate of 85 more than % all can be kept between C.Simulated flue gas is by N
2, O
2, NO and NH
3composition, wherein NO/NH
3=1:1, volumetric concentration is 500 ppm, O
2concentration is 5 %, and Balance Air is nitrogen.
Test the sulfur resistance of above-mentioned catalyst: the catalyst prepared is put into fixed bed quartz tube reactor and carries out active testing, in reaction temperature 200
oc, sulfur dioxide concentration is at 200 ppm, and air speed is 20000 h
-1condition under, the catalytic activity of more than 85% can be kept in the test process of 4h, and closedown sulfur dioxide after, activity can return to 88%.
Embodiment three:
Configuration concentration is 1 × 10
-2the liquor potassic permanganate of mol/L, subsequently the multi-walled carbon nano-tubes in potassium permanganate mass ratio being 20:1 is added in liquor potassic permanganate, ultrasonic disperse 0.6h, after Solution Dispersion to be mixed is even, by acetic acid adjust ph to 2, subsequently mixed solution is warming up to 70 under strong stirring condition
oc refluxes, and is washed by product, can obtain manganese dioxide-carbon mano-tube composite after oven dry after reaction 4h by deionized water.
Prepared manganese dioxide-the carbon mano-tube composite that has is added in deionized water, ultrasonic disperse 0.6h, after product is uniformly dispersed, adding with manganese dioxide-carbon mano-tube composite mass ratio is in the solution the cobalt chloride of 0.3:1, subsequently mixed solution is warming up to 70 under strong stirring condition
oc carries out surface replacement, is washed by product, can obtain and have cobalt oxide-manganese dioxide-CNT composite bed level structure denitrating catalyst after oven dry after reaction 2h by deionized water.
Test the catalytic activity of above-mentioned catalyst: the catalyst prepared is put into fixed bed quartz tube reactor and carries out active testing, in reaction temperature 90 ~ 330
oc, air speed is 20000 h
-1condition under, 150 ~ 300
othe removal of nitrogen oxide rate of 80 more than % all can be kept between C.Simulated flue gas is by N
2, O
2, NO and NH
3composition, wherein NO/NH
3=1:1, volumetric concentration is 500 ppm, O
2concentration is 5 %, and Balance Air is nitrogen.
Test the sulfur resistance of above-mentioned catalyst: the catalyst prepared is put into fixed bed quartz tube reactor and carries out active testing, in reaction temperature 200
oc, sulfur dioxide concentration is at 200 ppm, and air speed is 20000 h
-1condition under, the catalytic activity of more than 83% can be kept in the test process of 4h, and closedown sulfur dioxide after, activity can return to 85%.
Embodiment four:
Configuration concentration is 5 × 10
-2the liquor potassic permanganate of mol/L, subsequently the multi-walled carbon nano-tubes in potassium permanganate mass ratio being 25:1 is added in liquor potassic permanganate, ultrasonic disperse 1h, after Solution Dispersion to be mixed is even, by acetic acid adjust ph to 3, subsequently mixed solution is warming up to 80 under strong stirring condition
oc refluxes, and is washed by product, can obtain manganese dioxide-carbon mano-tube composite after oven dry after reaction 5h by deionized water.
Prepared manganese dioxide-the carbon mano-tube composite that has is added in deionized water, ultrasonic disperse 1h, after product is uniformly dispersed, adding with manganese dioxide-carbon mano-tube composite mass ratio is in the solution the nickel chloride of 0.5:1, subsequently mixed solution is warming up to 80 under strong stirring condition
oc carries out surface replacement, is washed by product, can obtain and have nickel oxide-manganese dioxide-CNT composite bed level structure denitrating catalyst after oven dry after reaction 3h by deionized water.
Test the catalytic activity of above-mentioned catalyst: the catalyst prepared is put into fixed bed quartz tube reactor and carries out active testing, in reaction temperature 90 ~ 330
oc, air speed is 20000 h
-1condition under, 170 ~ 310
othe removal of nitrogen oxide rate of 84 more than % all can be kept between C.Simulated flue gas is by N
2, O
2, NO and NH
3composition, wherein NO/NH
3=1:1, volumetric concentration is 500 ppm, O
2concentration is 5 %, and Balance Air is nitrogen.
Test the sulfur resistance of above-mentioned catalyst: the catalyst prepared is put into fixed bed quartz tube reactor and carries out active testing, in reaction temperature 200
oc, sulfur dioxide concentration is at 200 ppm, and air speed is 20000 h
-1condition under, the catalytic activity of more than 74% can be kept in the test process of 4h, and closedown sulfur dioxide after, activity can return to 76%.
Claims (5)
1. there is a preparation method for the carbon nano tube denitration catalyst of composite bed level structure, it is characterized in that the method comprises following operating procedure:
Configuration concentration is 1 × 10
-3~ 5 × 10
-2the liquor potassic permanganate of mol/L, by being 20 ~ 0.5:1 with potassium permanganate mass ratio, multi-walled carbon nano-tubes adds in liquor potassic permanganate subsequently, ultrasonic disperse 0.2 ~ 1h, after Solution Dispersion to be mixed is even, with acetic acid adjust ph to 1 ~ 4, subsequently mixed solution is warming up to 60 ~ 90 under strong stirring condition
oc refluxes, and is washed by product, can obtain manganese dioxide-carbon mano-tube composite after oven dry after reaction 2 ~ 5h by deionized water;
Manganese dioxide-carbon mano-tube composite is added in deionized water, ultrasonic disperse 0.2 ~ 1h, after product is uniformly dispersed, add a certain amount of divalent metal salt in the solution, subsequently mixed solution is heated up under strong stirring condition, carry out surface replacement reaction, after having reacted, product is spent deionized water, corresponding metal oxide-manganese dioxide-CNT composite bed level structure denitrating catalyst after oven dry, can be obtained.
2. there is a preparation method for the carbon nano tube denitration catalyst of composite bed level structure, it is characterized in that: the denitrating catalyst prepared by the method has the composite bed level structure of metal oxide-Mn oxide-CNT; In the middle of surface active composition, the ratio between metal oxide-Mn oxide can regulate and control in preparation process.
3., according to the preparation method with the carbon nano tube denitration catalyst of composite bed level structure described in claims 1, the divalent metal salt wherein selected is frerrous chloride, ferrous sulfate, cobalt chloride, the one in nickel chloride.
4., according to the preparation method with the carbon nano tube denitration catalyst of composite bed level structure described in claims 1, wherein the mass ratio of manganese dioxide-carbon mano-tube composite and divalent metal salt is 1:0.05 ~ 0.5.
5., according to the preparation method with the carbon nano tube denitration catalyst of composite bed level structure described in claims 1, the range of reaction temperature wherein carrying out surface replacement reaction is 50 ~ 80
oc, the described reaction time is 0.5 ~ 3h.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304354A (en) * | 2015-10-28 | 2016-02-03 | 上海大学 | Preparation method of manganese dioxide/carbon material composite nano materials |
| CN110947396A (en) * | 2019-12-18 | 2020-04-03 | 上海应用技术大学 | Spherical manganese oxide coated iron oxide core-shell structure compound and preparation method and application thereof |
| CN113368865A (en) * | 2021-06-08 | 2021-09-10 | 中国科学院山西煤炭化学研究所 | Denitration catalyst, preparation method thereof and waste gas denitration method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU430052A1 (en) * | 1972-04-21 | 1974-05-30 | Н. И. Ильченко , Г. И. Голодец | METHOD OF OBTAINING NITROGEN OXIDE |
| CN101804344A (en) * | 2010-04-28 | 2010-08-18 | 杨巧文 | Manganese/carbon nanotube denitrification catalytic reduction catalyst and preparation method thereof |
-
2015
- 2015-06-24 CN CN201510352567.XA patent/CN104941659A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU430052A1 (en) * | 1972-04-21 | 1974-05-30 | Н. И. Ильченко , Г. И. Голодец | METHOD OF OBTAINING NITROGEN OXIDE |
| CN101804344A (en) * | 2010-04-28 | 2010-08-18 | 杨巧文 | Manganese/carbon nanotube denitrification catalytic reduction catalyst and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| CHENG FANG ET AL: ""Low-temperature selective catalytic reduction of NO with NH3 over nanoflaky MnOx on carbon nanotubes in situ prepared via a chemical bath deposition route"", 《NANOSCALE》 * |
| MYOUNG HWAN OH ET AL: ""Galvanic Replacement Reactions in Metal Oxide Nanocrystals"", 《SCIENCE》 * |
| YANBING ZHANG ET AL: ""Preparation of Mn–FeOx/CNTs catalysts by redox co-precipitation and application in low-temperature NO reduction with NH3"", 《CATALYSIS COMMUNICATIONS》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304354A (en) * | 2015-10-28 | 2016-02-03 | 上海大学 | Preparation method of manganese dioxide/carbon material composite nano materials |
| CN110947396A (en) * | 2019-12-18 | 2020-04-03 | 上海应用技术大学 | Spherical manganese oxide coated iron oxide core-shell structure compound and preparation method and application thereof |
| CN110947396B (en) * | 2019-12-18 | 2023-03-28 | 上海应用技术大学 | Spherical manganese oxide coated iron oxide core shell structural composite, preparation method and application |
| CN113368865A (en) * | 2021-06-08 | 2021-09-10 | 中国科学院山西煤炭化学研究所 | Denitration catalyst, preparation method thereof and waste gas denitration method |
| CN113368865B (en) * | 2021-06-08 | 2022-12-02 | 中国科学院山西煤炭化学研究所 | Denitration catalyst, preparation method thereof and waste gas denitration method |
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Application publication date: 20150930 |