CN101108304A - Preparation of wave absorbing catalyst and application of the same in purifying flue gas - Google Patents
Preparation of wave absorbing catalyst and application of the same in purifying flue gas Download PDFInfo
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- CN101108304A CN101108304A CNA2007100438868A CN200710043886A CN101108304A CN 101108304 A CN101108304 A CN 101108304A CN A2007100438868 A CNA2007100438868 A CN A2007100438868A CN 200710043886 A CN200710043886 A CN 200710043886A CN 101108304 A CN101108304 A CN 101108304A
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Abstract
The invention discloses an absorber catalyst containing vanadium pentoxide, Ti02 and activated charcoal and a method of purifying smoke and gas under microwave radiation with the catalyst. The catalyst mainly composed of an activated charcoal base with absorption function, a Ti02 carrier with a high specific surface area and a vanadium pentoxide active component with strong oxidizing performance. As the microwave can take strong assisting and catalysis effect to chemical reaction, the invention realizes remarkable purifying effect to SO2 and nitrogen oxides in smoke and gas by the microwave inducing coupling catalysis, the desulfuration and denitration rate can reach above 90 per cent and 85 per cent respectively. The catalyst has simple technique of preparation, good adsorption performance and long service life, which has good catalyst, desulfuration and denitration activity in microwave field.
Description
Technical field
The invention belongs to the flue gas process field, relate to a kind of flue gas desulfurization and denitrification Preparation of catalysts method and application thereof specifically.
Background technology
Contain multiple oxious components such as sulfur dioxide, nitrogen oxide and dust in coal-burning boiler and the thermal power plant discharged flue gas, natural resources, the ecosystem, material, visibility and public health to China have constituted serious threat, also influence simultaneously the socio-economic development and the people's normal life, control SO
2, NO discharging become one of China's vital task quite over a long time.The exploitation of therefore, gas cleaning new technology and new technology becomes environment in recent years and pollutes control and the research focus of administering.Flue gas simultaneous desulfurization (SO
2) denitration (NO) technology is because of effectively avoiding the equipment repeated configuration, operating cost is low, and is simple to operate, etc. characteristics, is considered to a very promising flue gases purification.
In numerous gas denitrifying technologies, selective-catalytic-reduction denitrified (SCR) is most widely used for ammonia process, as industrial catalyst V
2O
5/ TiO
2, but the problem that this catalyst exists is to operate under higher temperature, to avoid owing to the SO in the flue gas
2With reducing agent NH
3Reaction generates sulfate of ammoniac salt and blocks the duct and cause catalysqt deactivation.At present, also have the method for many while desulphurization denitrations to be among the research and development, as electron beam irradiation, impulse electric corona technology, yet because power consumption is big, and energy utilization rate is low, the operating cost height is not suitable for large-scale application.Therefore, purify the flue gas, also can adopt new catalysis technique to improve activity of such catalysts except that continuing to seek new catalyst.
Heating using microwave is the body heating of from-inner-to-outer, compares with conventional mode of heating, and heating using microwave has following advantage: homogeneous heating, fast efficient, selectivity is strong, is convenient to control, non-secondary pollution etc.
In recent years, both at home and abroad catalytic microwave Study on Technology report is also increased year by year.Heating using microwave is used for flue gas and desulfurizing and denitrifying at the existing report of Chinese patent (CN1736558A and CN1824371A), and heating using microwave not only improves reaction rate, can also reduce reaction temperature.The micro ware auxiliary catalysis desulphurization denitration only uses catalyst to compare than routine, can effectively improve activity of such catalysts; Compare with the electron beam irradiation method, it is few to have an equipment investment, capacity usage ratio height, advantage such as system is stable, and maintenance cost is low.Therefore, in the flue gas desulfurization and denitrification field very big development potentiality is arranged.
Summary of the invention
The object of the present invention is to provide a kind of preparation method and application thereof of new catalyst of catalytic microwave flue gas.
The present invention has strong auxiliary catalysis effect in view of microwave to chemical reaction, by microwave induced coupling and catalyzing, has realized sulfur dioxide in flue gas and the significant clean-up effect of nitrogen oxide.Catalysis Principles is that high loss Wave absorbing catalyst surface produces hot localised points in microwave field, and temperature is higher than the bulk temperature of catalyst and substrate, thereby can purify flue gas by efficient catalytic in hot localised points.
A kind of purification flue gas desulfurization and denitrification catalyst of the present invention, with the active carbon with absorbing property is substrate, with the vanadic anhydride is active component, be carrier with titanium dioxide simultaneously with high-specific surface area, it is characterized in that this catalyst is substrate with the active carbon with absorbing property, with the vanadic anhydride is active component, is that carrier is formed with the titanium dioxide with high-specific surface area simultaneously.
In above-mentioned catalyst, it is characterized in that active carbon, titanium dioxide and vanadic anhydride weight ratio are 10: 1: 0.1～20: 1: 0.02.
In above-mentioned catalyst, it is characterized in that comprising the steps: earlier active carbon being activated, after being ground into 10～20 purpose particles, take by weighing a certain amount of ammonium metavanadate and oxalic acid (mol ratio of oxalic acid and ammonium metavanadate is 2: 1) more respectively, it is even to put 90 ℃ of stirred in water bath, after treating that it fully reacts, with TiO
2Carrier adds this solution and ceaselessly stirs; obtain having the colloidal sol of certain viscosity afterwards; utilize the rotary plating method that colloidal sol is coated at absorbent charcoal based the end and can obtain the wet gel film; coating is at process air dry 10～20h, after calcine the catalyst that 4～5 h just can form this invention in 400～600 ℃ of scopes under the argon shield.
In above-mentioned catalyst, it is characterized in that: the number of times that covers titanium dioxide and vanadic anhydride in absorbent charcoal based primary coat is 1～5, and calcining heat is 400～800 ℃.
In above-mentioned catalyst, it is characterized in that this catalyst can be used for the single desulfurization of flue gas, denitration and while desulphurization denitration.
In addition, the present invention is the cocatalyst effect that utilizes microwave, is coupled by the catalytic performance with catalyst, realizes that microwave condition purifies flue gas down, is characterized in that used catalyst is the flue gas purifying catalyst of the invention described above.
Such catalyst preparation process is simple, and absorbing property is good, and long service life has excellent catalytic performance under heating using microwave.The microwave heating equipment volume is little simultaneously, and floor space is few, and the smoke eliminator investment cost is also few, realizes easily in industrial production.
Description of drawings
Fig. 1 is catalyst test apparatus figure.
The specific embodiment
Below by embodiment the present invention is specifically described; it is important to point out that present embodiment only is used for that the present invention will be further described; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment 1
The Preparation of catalysts method: active carbon fully cleans to remove impurity and unclean particle with deionized water earlier, fully boils 12h with deionized water again, and 120 ℃ of oven dry 10h in baking oven break into pieces at last, sieve out 10～20 purpose particles.
Take by weighing a certain amount of ammonium metavanadate and oxalic acid (mol ratio of oxalic acid and ammonium metavanadate is 2: 1) respectively, it is even to put 90 ℃ of stirred in water bath, treat that it fully reacts after, with TiO
2Carrier adds this solution and ceaselessly stirs; obtain having the colloidal sol of certain viscosity afterwards; utilize the rotary plating method that colloidal sol is coated at absorbent charcoal based the end and can obtain the wet gel film; coating just can form the catalyst of this invention again through air dry 24h through calcining 5h in the following 450 ℃ of scopes of argon shield.
Embodiment 2
The catalyst of preparation among the embodiment 1 is placed the fixed bed reactors of particular design.Normal pressure and temperature feeds simulated flue gas down and carries out microwave (microwave output power is 230W) heating simultaneously, tests used simulated flue gas component and is: SO
2600ppm, NO 300ppm, O
2Shared volume is 6%, H
2O is 0～10%, N
2Be balance gas, air speed is 6000h
-1The time, SO
2Conversion ratio reaches 92%, and the NO conversion ratio reaches 85%.
Embodiment 3
The catalyst A of preparation among the embodiment 1 is placed the fixed bed reactors of particular design, and normal pressure and temperature feeds simulated flue gas down and carries out microwave (microwave output power is 380W) heating simultaneously, tests used simulated flue gas component and is: SO
2600ppm, NO 300ppm, O
2Shared volume is 6%, H
2The shared volume of O is 0～10%, N
2Be balance gas, air speed is 6000h
-1The time, SO
2Conversion ratio reaches 85%, and the NO conversion ratio reaches 80%.
Embodiment 4
The catalyst A of preparation among the embodiment 1 is placed the fixed bed reactors of particular design, and normal pressure and temperature feeds simulated flue gas down and carries out microwave (microwave output power is 230W) heating simultaneously, and the simulated flue gas component is: SO
2600ppm, NO 300ppm, O
2Shared volume is 6%, H
2The shared volume of O is 0～10%, N
2Be balance gas, air speed is 6000h
-1The time, SO
2See Table 1 with the conversion ratio of NO.
The comparison of catalyst activity under table 1 microwave and the conventional heating condition
| Mode of heating | SO 2Conversion ratio (%) | NO conversion ratio (%) |
| The microwave routine | 91.45 63.56 | 85.72 52.93 |
Embodiment 5
The catalyst A of preparation among the embodiment 1 is placed the fixed bed reactors of particular design, and normal pressure and temperature feeds simulated flue gas down and carries out microwave (microwave output power is 230W) heating simultaneously, tests used simulated flue gas component and is: SO
2600ppm, NO 300ppm, O
2Shared volume is 6%, H
2The shared volume of O is 0～10%, N
2Be balance gas, air speed is 6000h
-1The time, the pentoxide content of load is to SO
2See Table 2 with the influence of the conversion ratio of NO.
The pentoxide content of table 2 load influences catalyst activity
| Load capacity | 1 | 2 | 4 | 6 | 8 |
| NO conversion ratio (%) SO 2Conversion ratio (%) | 55.4 61.6 | 60.5 76.7 | 75.9 83.3 | 85.6 90.9 | 78.1 87.2 |
Claims (7)
1. a flue gas purifying catalyst is characterized in that this catalyst is substrate with the active carbon with absorbing property, is active component with the vanadic anhydride, is that carrier is formed with the titanium dioxide with high-specific surface area simultaneously.
2. according to the described flue gas purifying catalyst of claim 1, it is characterized in that active carbon, titanium dioxide and vanadic anhydride weight ratio are 10: 1: 0.1～20: 1: 0.02.
3. according to the preparation method of the described flue gas purifying catalyst of claim 1; it is characterized in that comprising the steps: earlier active carbon being activated; after being ground into 10～20 purpose particles; take by weighing a certain amount of ammonium metavanadate and oxalic acid (mol ratio of oxalic acid and ammonium metavanadate is 2: 1) more respectively; place 90 ℃ of stirred in water bath even; after treating that it fully reacts; the TiO2 carrier is added this solution ceaselessly to be stirred; obtain having the colloidal sol of certain viscosity afterwards; utilize the rotary plating method that colloidal sol is coated at absorbent charcoal based the end and can obtain the wet gel film; coating is calcined the catalyst that 4～5h just can form this invention in 400～600 ℃ of scopes at last again through air dry 10～20 under argon shield.
4. according to the described flue gas purifying catalyst of claim 1, it is characterized in that it is 1～5 that the number of times of titanium dioxide and vanadic anhydride is covered in absorbent charcoal based primary coat, calcining heat is 400～800 ℃.
5. according to the described flue gas purifying catalyst of claim 1, it is characterized in that this catalyst can be used for the single desulfurization of flue gas, denitration and while desulphurization denitration.
6. the method for a flue gas and desulfurizing and denitrifying is the auxiliary catalysis effect that utilizes microwave, by with the catalytic performance coupling of catalyst, realize that microwave condition purifies flue gas down, is characterized in that used catalyst is the described catalyst of claim 1～5.
7. according to the method for the described purification flue gas of claim 6, it is characterized in that used microwave power is 100～700W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100438868A CN101108304A (en) | 2007-07-17 | 2007-07-17 | Preparation of wave absorbing catalyst and application of the same in purifying flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100438868A CN101108304A (en) | 2007-07-17 | 2007-07-17 | Preparation of wave absorbing catalyst and application of the same in purifying flue gas |
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|---|---|
| CN101108304A true CN101108304A (en) | 2008-01-23 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010151231A1 (en) * | 2009-06-22 | 2010-12-29 | Nanyang Technological University | Doped catalytic carbonaceous composite materials and uses thereof |
| CN101972603A (en) * | 2010-10-25 | 2011-02-16 | 湘潭大学 | Method for removing nitrogen oxides from waste gas |
| CN102614776A (en) * | 2012-02-27 | 2012-08-01 | 宁波诺丁汉大学 | Device and method for desulfuration, denitration and demercuration by using microwave induction and catalysis jointly |
| RU2483391C2 (en) * | 2011-04-01 | 2013-05-27 | Михаил Юрьевич Валенцов | Light diode lamp |
| CN103263909A (en) * | 2013-05-16 | 2013-08-28 | 太原理工大学 | Method for preparing catalyst for removing SO2 and NO out of cigarette smoke |
| CN102103047B (en) * | 2009-12-21 | 2014-07-16 | 中国科学院城市环境研究所 | Method and device for detecting fume denitration catalyst activity |
| CN106008188A (en) * | 2016-05-30 | 2016-10-12 | 浙江工业大学 | Novel method for preparing acraldehyde through glycerin catalytic dehydration |
| CN107008323A (en) * | 2017-05-27 | 2017-08-04 | 宝鸡市金得利新材料有限公司 | A kind of activated-carbon catalyst preparation method for flue gas desulfurization and denitrification |
| CN107694307A (en) * | 2017-10-25 | 2018-02-16 | 天津大学 | A kind of method that microwave radiation collaboration Two Liquid Phases biofiltration tower removes VOCs |
| CN109046013A (en) * | 2018-09-05 | 2018-12-21 | 东莞市正品五金电子有限公司 | A kind of ceramic kiln exhaust treatment system |
| CN110312564A (en) * | 2017-02-13 | 2019-10-08 | 卡尔冈碳素公司 | Chloramines and chlorine removal material and preparation method thereof |
| US12083502B2 (en) | 2018-02-13 | 2024-09-10 | Calgon Carbon Corporation | Chemical sorbent oxidation method and sorbents made therefrom |
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2007
- 2007-07-17 CN CNA2007100438868A patent/CN101108304A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010151231A1 (en) * | 2009-06-22 | 2010-12-29 | Nanyang Technological University | Doped catalytic carbonaceous composite materials and uses thereof |
| CN102103047B (en) * | 2009-12-21 | 2014-07-16 | 中国科学院城市环境研究所 | Method and device for detecting fume denitration catalyst activity |
| CN101972603A (en) * | 2010-10-25 | 2011-02-16 | 湘潭大学 | Method for removing nitrogen oxides from waste gas |
| RU2483391C2 (en) * | 2011-04-01 | 2013-05-27 | Михаил Юрьевич Валенцов | Light diode lamp |
| CN102614776A (en) * | 2012-02-27 | 2012-08-01 | 宁波诺丁汉大学 | Device and method for desulfuration, denitration and demercuration by using microwave induction and catalysis jointly |
| CN102614776B (en) * | 2012-02-27 | 2014-04-09 | 宁波诺丁汉大学 | Device and method for desulfuration, denitration and demercuration by using microwave induction and catalysis jointly |
| CN103263909A (en) * | 2013-05-16 | 2013-08-28 | 太原理工大学 | Method for preparing catalyst for removing SO2 and NO out of cigarette smoke |
| CN106008188A (en) * | 2016-05-30 | 2016-10-12 | 浙江工业大学 | Novel method for preparing acraldehyde through glycerin catalytic dehydration |
| CN106008188B (en) * | 2016-05-30 | 2018-05-29 | 浙江工业大学 | A kind of glycerin catalytic dehydration prepares the new method of methacrylaldehyde |
| CN110312564A (en) * | 2017-02-13 | 2019-10-08 | 卡尔冈碳素公司 | Chloramines and chlorine removal material and preparation method thereof |
| CN110312564B (en) * | 2017-02-13 | 2021-11-16 | 卡尔冈碳素公司 | Chloramine and chlorine removal material and preparation method thereof |
| CN107008323A (en) * | 2017-05-27 | 2017-08-04 | 宝鸡市金得利新材料有限公司 | A kind of activated-carbon catalyst preparation method for flue gas desulfurization and denitrification |
| CN107008323B (en) * | 2017-05-27 | 2019-07-16 | 山东金瑞达环保科技有限公司 | A kind of activated-carbon catalyst preparation method for flue gas desulfurization and denitrification |
| CN107694307A (en) * | 2017-10-25 | 2018-02-16 | 天津大学 | A kind of method that microwave radiation collaboration Two Liquid Phases biofiltration tower removes VOCs |
| US12083502B2 (en) | 2018-02-13 | 2024-09-10 | Calgon Carbon Corporation | Chemical sorbent oxidation method and sorbents made therefrom |
| CN109046013A (en) * | 2018-09-05 | 2018-12-21 | 东莞市正品五金电子有限公司 | A kind of ceramic kiln exhaust treatment system |
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Open date: 20080123 |