CN103691423A - Preparation method for high-activity cellular nitrogen oxide removal catalyst - Google Patents
Preparation method for high-activity cellular nitrogen oxide removal catalyst Download PDFInfo
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- CN103691423A CN103691423A CN201310620683.6A CN201310620683A CN103691423A CN 103691423 A CN103691423 A CN 103691423A CN 201310620683 A CN201310620683 A CN 201310620683A CN 103691423 A CN103691423 A CN 103691423A
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- nitrogen oxide
- catalyst
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000003054 catalyst Substances 0.000 title claims abstract description 25
- 230000000694 effects Effects 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 230000001413 cellular effect Effects 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000003365 glass fiber Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 244000275012 Sesbania cannabina Species 0.000 claims abstract 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 2
- -1 polyoxyethylene Polymers 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- 238000002156 mixing Methods 0.000 abstract 3
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 241000219782 Sesbania Species 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000002902 bimodal effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the field of catalysts, and discloses a preparation method for a high-activity cellular nitrogen oxide removal catalyst. The preparation method is characterized by comprising the following steps: putting weighed TiO2 powder, SiO2, WO3 and V2O5 into a material mixing machine and stirring; adding a small amount of ammonia water and water in the process of stirring to adjust the PH value of the materials to be greater than 7; adding glass fiber and a trace amount of carboxymethyl cellulose, polyoxyethylene and sesbania powder, mixing by using a mixing machine to finally obtain a material which is suitable for extrusion molding, wherein the material mainly comprises the components of 68 to 92.8 percent of TiO2, 3 to 10 percent of SiO2, 2 to 10 percent of glass fiber, 2 to 10 percent of WO3, and 0.2 to 2 percent of V2O5. Due to the adoption of the technical scheme, the catalyst has the advantages of high mechanical strength, high wear-resistant strength, high temperature resistance, high activity and the like, can function under specific flue gas conditions, and can be widely applied to denitration devices such as low and high-dust thermal power plants.
Description
Technical field
The present invention relates to catalyst field, is the preparation method that a kind of high activity honeycomb fashion removes nitrogen oxide catalyst.
Background technology
Power plants nitrogen oxide generation accounts for 50% of national total release, and nitrogen oxide is the main reason that forms acid rain and photochemical fog in atmosphere, serious harm natural environment and human health.In September, 2011,21 Chinese Ministry of Environmental Protection issued < < fossil-fuel power plant atmospheric pollutant emission standard > >, and the concentration of emission limit value unification of domestic nitrogen oxide is defined as 100mg/m
3, the new-built unit time of implementation, the old unit time of implementation, this concentration of emission limit value required for national all regions from July, 2014 from 2012.Current, the mainstream technology of denitrating flue gas is SCR SCR technology in the world, and its core is SCR catalyst.
As far back as the seventies in last century, developed country just starts, according to situations such as national emission level, coal characteristics, boiler types, to have developed a series of SCR catalyst as Japan, Germany, the U.S. etc.At present, the experience of the many R&D institutions of China or individual foreign, complicated for Coal Combustion in China ature of coal, (for example flue-gas temperature is interval 360 ℃ ~ 450 ℃, and domestic coal-fired dustiness is up to 50-60g/Nm for the non-constant of boiler smoke condition after burning
3deng, flue gas NOx is up to 750mg) etc. situation, carry out the research of catalyst, and developed a series of denitrating catalysts.
Currently take the compositions such as TiO2 as main, V2O5 is denitrating catalyst active component.Simultaneously V2O5 is also the active component of SO2 oxidation side reaction, so the content of V2O5 is subject to the restriction of SO2 oxygenation efficiency, is not therefore increasing on the basis of V2O5 content, and adjusting formula, to improve catalyst activity will be the important breakthrough that catalyst is made.
Summary of the invention
The object of this invention is to provide and do not increasing on the basis of V2O5 content, adjust the preparation method that honeycomb fashion that formula improves catalyst activity removes nitrogen oxide catalyst, this catalyst is mainly with nano-TiO
2for main component, add certain auxiliary agent and pore former and active component, thereby make this catalyst there is bimodal pore distribution structure.
Technical scheme of the present invention is: a kind of high activity honeycomb fashion removes the preparation method of nitrogen oxide catalyst, it is characterized in that making step is:
A by take TiO
2powder, SiO
2, WO
3and V
2o
5put into batch mixer, stir; In whipping process, add a small amount of ammoniacal liquor and water, make the pH value of its material be greater than 7;
B adds carboxymethyl cellulose, polyethylene glycol oxide, the sesbania powder of glass fibre and trace, with batch mixer, mixes, and finally blends the material that is applicable to extrusion molding;
It is 150mm * 150mm that c extrudes sectional area with vacuum-extruder by above-mentioned material, and hole count is 18 * 18, the honeycomb fashion idiosome that length is 1000mm;
D is dried 7 ~ 15 days by idiosome under the condition of 30 ~ 70 ℃ of temperature, humidity 20 ~ 100%;
E calcines dried idiosome 8 ~ 15 hours under 250 ~ 300 ℃ of conditions, then under 380 ~ 420 ℃ of conditions, calcine 5 ~ 10 hours, finally under 580 ~ 620 ℃ of conditions, calcine 8 ~ 12 hours, thereby obtain a kind of highly active honeycomb fashion NO_x removal catalyst agent product.
Its main component TiO
2content is 68 ~ 92.8%, SiO
2content is 3%-10%, and content of glass fiber is 2%-10%, WO
3content is 2% ~ 10%, V
2o
5content is 0.2% ~ 2%.
Owing to having adopted technique scheme, this catalyst mechanical strength is high, wear strength is strong, high temperature resistant, active advantages of higher.Can under specific flue gas condition, move, can extensively apply in the denitrification apparatus such as low, high dust thermal power plant.
The specific embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
Embodiment 1
By the TiO of the 10Kg taking
2the SiO of powder, 500g
2, 0.4Kg WO
3and the V of 70g
2o
5, put into batch mixer, stir; In whipping process, add a small amount of ammoniacal liquor and water, make the pH value of its material be greater than 7;
Add 0.5Kg glass fibre, 20g carboxymethyl cellulose, 30g polyethylene glycol oxide, 20g sesbania powder, with batch mixer, mix 2 ~ 4h, finally blend the material that is applicable to extrusion molding;
With vacuum-extruder, above-mentioned material being extruded to sectional area is 150mm * 150mm, and hole count is 20 * 20, the honeycomb fashion idiosome that length is 1000mm;
Idiosome is dried to 7 ~ 15 days under the condition of 30 ~ 70 ℃ of temperature, humidity 20 ~ 100%;
Dried idiosome is calcined 8 ~ 15 hours under 250 ~ 300 ℃ of conditions, then under 380 ~ 420 ℃ of conditions, calcined 5 ~ 10 hours, finally under 580 ~ 620 ℃ of conditions, calcine 8 ~ 12 hours, thereby obtain suitable catalyst.
Claims (2)
1. high activity honeycomb fashion removes a preparation method for nitrogen oxide catalyst, it is characterized in that making step is:
A by take TiO
2powder, SiO
2, WO
3and V
2o
5put into batch mixer, stir; In whipping process, add a small amount of ammoniacal liquor and water, make the pH value of its material be greater than 7;
B adds carboxymethyl cellulose, polyethylene glycol oxide, the sesbania powder of glass fibre and trace, with batch mixer, mixes, and finally blends the material that is applicable to extrusion molding;
It is 150mm * 150mm that c extrudes sectional area with vacuum-extruder by above-mentioned material, and hole count is 18 * 18, the honeycomb fashion idiosome that length is 1000mm;
D is dried 7 ~ 15 days by idiosome under the condition of 30 ~ 70 ℃ of temperature, humidity 20 ~ 100%;
E calcines dried idiosome 8 ~ 15 hours under 250 ~ 300 ℃ of conditions, then under 380 ~ 420 ℃ of conditions, calcine 5 ~ 10 hours, finally under 580 ~ 620 ℃ of conditions, calcine 8 ~ 12 hours, thereby obtain a kind of highly active honeycomb fashion NO_x removal catalyst agent product.
2. a kind of high activity honeycomb fashion according to claim 1 removes the preparation method of nitrogen oxide catalyst, it is characterized in that its main component TiO
2content is 68 ~ 92.8%, SiO
2content is 3%-10%, and content of glass fiber is 2%-10%, WO
3content is 2% ~ 10%, V
2o
5content is 0.2% ~ 2%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310620683.6A CN103691423A (en) | 2013-11-29 | 2013-11-29 | Preparation method for high-activity cellular nitrogen oxide removal catalyst |
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|---|---|---|---|
| CN201310620683.6A CN103691423A (en) | 2013-11-29 | 2013-11-29 | Preparation method for high-activity cellular nitrogen oxide removal catalyst |
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| Publication Number | Publication Date |
|---|---|
| CN103691423A true CN103691423A (en) | 2014-04-02 |
Family
ID=50353182
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962126A (en) * | 2014-05-25 | 2014-08-06 | 华东理工大学 | Catalyst for selectively catalyzing and reducing nitrogen oxides and preparation method thereof |
| CN104549311A (en) * | 2014-12-30 | 2015-04-29 | 安徽省元琛环保科技有限公司 | Special non-toxic denitration catalyst for coal-fired power plant and preparation method of special non-toxic denitration catalyst |
| CN104971715A (en) * | 2015-06-30 | 2015-10-14 | 郑州康宁特环保装备科技有限公司 | Preparation method for cellular thin-walled denitration catalyst |
| CN105289580A (en) * | 2015-10-12 | 2016-02-03 | 安徽迪诺环保新材料科技有限公司 | Soaking type low-temperature honeycomb flue gas catalyst and preparation method thereof |
| CN106311301A (en) * | 2016-08-19 | 2017-01-11 | 安徽元琛环保科技股份有限公司 | Super-wear-resistant cellular denitration catalyst and preparation method thereof |
| CN114713292A (en) * | 2022-05-05 | 2022-07-08 | 安徽工程大学 | End face treating agent, preparation method and application thereof, and end face treatment method after catalyst regeneration |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502796A (en) * | 2009-03-20 | 2009-08-12 | 无锡市宜刚耐火材料有限公司 | Integral honeycomb selective catalytic reduction catalyst for flue gas denitration and method for preparing the same |
| CN101676024A (en) * | 2008-09-17 | 2010-03-24 | 晶锐瓷业（北京）有限公司 | Faviform ammonia-method selective-catalytic-reduction denitrified catalyst and preparation method thereof |
| CN103143396A (en) * | 2013-03-04 | 2013-06-12 | 郑州康宁特环保工程技术有限公司 | Honeycomb flue gas denitrification catalyst and preparation method thereof |
-
2013
- 2013-11-29 CN CN201310620683.6A patent/CN103691423A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101676024A (en) * | 2008-09-17 | 2010-03-24 | 晶锐瓷业（北京）有限公司 | Faviform ammonia-method selective-catalytic-reduction denitrified catalyst and preparation method thereof |
| CN101502796A (en) * | 2009-03-20 | 2009-08-12 | 无锡市宜刚耐火材料有限公司 | Integral honeycomb selective catalytic reduction catalyst for flue gas denitration and method for preparing the same |
| CN103143396A (en) * | 2013-03-04 | 2013-06-12 | 郑州康宁特环保工程技术有限公司 | Honeycomb flue gas denitrification catalyst and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962126A (en) * | 2014-05-25 | 2014-08-06 | 华东理工大学 | Catalyst for selectively catalyzing and reducing nitrogen oxides and preparation method thereof |
| CN104549311A (en) * | 2014-12-30 | 2015-04-29 | 安徽省元琛环保科技有限公司 | Special non-toxic denitration catalyst for coal-fired power plant and preparation method of special non-toxic denitration catalyst |
| CN104971715A (en) * | 2015-06-30 | 2015-10-14 | 郑州康宁特环保装备科技有限公司 | Preparation method for cellular thin-walled denitration catalyst |
| CN105289580A (en) * | 2015-10-12 | 2016-02-03 | 安徽迪诺环保新材料科技有限公司 | Soaking type low-temperature honeycomb flue gas catalyst and preparation method thereof |
| CN106311301A (en) * | 2016-08-19 | 2017-01-11 | 安徽元琛环保科技股份有限公司 | Super-wear-resistant cellular denitration catalyst and preparation method thereof |
| CN114713292A (en) * | 2022-05-05 | 2022-07-08 | 安徽工程大学 | End face treating agent, preparation method and application thereof, and end face treatment method after catalyst regeneration |
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Application publication date: 20140402 |