CN107008252B - Vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst and preparation method thereof - Google Patents
Vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst and preparation method thereof Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 74
- 239000000835 fiber Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- VBEMFYBUGWUTQR-UHFFFAOYSA-M O=[W](=O)=O.[O-2].[O-2].[O-2].[O-2].[OH-].O.O.[Ti+4].[V+5] Chemical compound O=[W](=O)=O.[O-2].[O-2].[O-2].[O-2].[OH-].O.O.[Ti+4].[V+5] VBEMFYBUGWUTQR-UHFFFAOYSA-M 0.000 title claims abstract description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003365 glass fiber Substances 0.000 claims abstract description 30
- 239000004927 clay Substances 0.000 claims abstract description 28
- 239000008107 starch Substances 0.000 claims abstract description 28
- 229920002472 Starch Polymers 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 27
- 235000019698 starch Nutrition 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 238000001354 calcination Methods 0.000 claims abstract description 17
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 14
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 14
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 14
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 14
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 14
- 238000004537 pulping Methods 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 3
- 239000008247 solid mixture Substances 0.000 claims description 2
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 claims 1
- 239000013543 active substance Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000005470 impregnation Methods 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 23
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 7
- 239000011593 sulfur Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/30—Tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/58—Fabrics or filaments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
A vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst, which is prepared from V2O5、WO3、TiO2Glass fiber, SiO2Starch and clay, and the preparation method comprises the following steps: using nano titanium dioxide as carrier and V2O5As a main catalyst, WO3Is a cocatalyst, glass fiber is a reinforcer, silica sol, starch and clay are binders, and the preparation method adopts the processes of pulping, papermaking, drying and calcining. The invention has the advantages that: the preparation method has simple process, and prepares the V by directly mixing the active substance, the carrier, the glass fiber and the binder to form slurry, overcoming the traditional impregnation or extrusion forming process and adopting a papermaking process2O5‑WO3‑TiO2The fiber paper catalyst greatly improves the specific surface area of the catalyst, thereby improving the dispersibility and activity of active substances of the catalyst on the surface of a matrix and greatly improving the utilization rate of the catalyst.
Description
Technical Field
The invention relates to preparation of a nitrogen oxide reduction catalyst, in particular to a vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst and a preparation method thereof.
Background
Nitrogen oxides are one of the major pollutants responsible for many environmental problems such as acid rain, acid mist, photochemical smog, greenhouse effect and ozone depletion, have received great attention in the last 30 years, and have led to a number of control technologies accordingly. The tail gas of the diesel engine also contains a large amount of nitrogen oxides, and researches show that the contribution of the nitrogen oxides is up to 10 percent of the emission amount of artificial nitrogen oxides, and the control standard of the emission amount of the nitrogen oxides of the diesel engine is increasingly strict in recent years.
The Urea selective catalytic reduction (Urea-SCR) system is one of the most effective technical measures for reducing the nitrogen oxides of the heavy diesel engine, and the method has the advantages of high efficiency, good selectivity, economy and the like. With the increasing strictness of emission regulations and the development of urea SCR technology, the technology is widely used in developed countries and regions such as europe.
There are three main types of diesel denitration catalysts: noble metal catalysts, metal oxide catalysts and zeolite catalysts. Although the noble metal catalyst started earlier, its wide application was limited due to poor selectivity and high temperature stability. The zeolite catalyst has wide application in Europe and America, but has poor sulfur resistance and poor hydrothermal stability. Vanadium-based catalysts among metal oxide catalysts supported on titanium dioxide have been used for many years and remain the best commercial catalysts due to their higher denitration activity, sulfur resistance. Research shows that in some emerging market countries, the sulfur content in the diesel engine can reach 2000ppm, and the commercial vanadium SCR catalyst has good application prospect when being used for denitration of diesel engine tail gas. The diesel oil in China has the phenomenon of generally high sulfur content, and the sulfur content in the diesel oil in most areas except Beijing, Shanghai and Guangzhou in China exceeds 50ppm, and the sulfur content in the diesel oil is even up to 350-2000 ppm. Sulfur resistance is therefore a matter of concern for the selective catalytic reduction catalyst.
At present, most denitration catalysts are powdery under laboratory conditions, but the catalysts are not suitable for industrial application due to large pressure drop, so that monolithic catalysts become the most common form in practical application. Extrusion catalysts are currently considered the most efficient technology, by slurrying the catalyst ingredients, extruding into a shape and then dry calcining, but are not fully utilized because the centrally located catalyst is not in direct contact with the flue gas. In addition, the process needs a large amount of catalyst powder, the manufacturing cost is high, and the preparation process of the method is complex. Therefore, it is imperative to develop a catalyst with lower cost and simple preparation method. V2O5-WO3-TiO2The fiber paper catalyst is a better choice, and the active ingredients are prepared into a thin paper state, so that various forms can be conveniently prepared subsequently, and the use amount of catalyst powder is greatly reduced, thereby reducing the catalyst cost.
V2O5-WO3-TiO2The preparation of the fiber paper catalyst comprises two or three steps. Firstly, nano titanium dioxide powder, glass fiber and polyvinylidene fluoride are mixedMixing ammonium vanadate, silica sol, starch, clay, water and the like according to a certain proportion, stirring for pulping, then making sheets on a paper machine, and drying by using a drying roller to obtain the required fiber paper catalyst. And (3) calcining and hardening the fiber paper catalyst at high temperature to obtain the required catalyst. The preparation method has the greatest advantage of simple preparation method. In addition, the distance of the reactants diffusing to the surface of the catalytic active substance is short, and the catalyst can be fully utilized. The invention provides a method for making a paper V from fiber2O5-WO3-TiO2The catalyst can be improved, and the high-efficiency denitration of the flue gas and the tail gas can be realized.
Disclosure of Invention
The invention aims to solve the problems, and provides a vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst and a preparation method thereof, wherein the preparation method has the advantages of simple process and low production cost; the specific surface area of the fiber paper is large, so that the dispersity of the catalyst active substance on the surface of the fiber paper is improved; the prepared catalyst has high catalytic activity.
The technical scheme of the invention is as follows:
a vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst, which is prepared from V2O5、WO3、TiO2Glass fiber, SiO2The starch and the clay comprise the following components in percentage by mass: v2O51-3%, WO35-8 percent of glass fiber, 8-12 percent of SiO21-3 percent of starch, 1-4 percent of clay and 1-2 percent of TiO2The balance being.
The preparation method of the vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst comprises the steps of taking nano titanium dioxide as a carrier and V2O5As a main catalyst, WO3Is a cocatalyst, glass fiber is a reinforcer, silica sol, starch and clay are binders, and the preparation method adopts the processes of pulping, papermaking, drying and calcining and comprises the following steps:
1) pulping process
Dissolving ammonium metavanadate and ammonium tungstate in deionized water at 60 ℃, stirring for 1hAdding nano TiO2Anatase powder is stirred for 2 hours to form uniform dispersion liquid, then acidic silica sol is added and stirred uniformly to obtain mixed liquid, starch, clay and glass fiber are added, stable slurry is obtained after stirring for 10 hours, and ammonium metavanadate (NH) is added into the solid mixture of the slurry4VO3) Ammonium tungstate [ (NH)4)2WO4]TiO 2 nanoparticles2Anatase powder, acidic silica Sol (SiO)2) The mass percentages of the starch, the clay and the glass fiber are calculated according to the following mass ratios: v2O51-3%, WO35-8 percent of glass fiber, 8-12 percent of SiO21-3 percent of starch, 1-4 percent of clay and 1-2 percent of nano TiO2The balance being anatase powder, the solids content of the slurry being 40-60 wt%.
2) Papermaking and catalyst calcining process
Mixing the above slurries, making paper with paper machine, drying with drying roller at 75 deg.C for 30min, and drying V2O5-WO3-TiO2Calcining the fiber paper in a muffle furnace at the temperature of 500 ℃ for 6h to obtain V2O5-WO3-TiO2A fiber paper catalyst.
Technical analysis of the invention:
according to the SCR denitration mechanism, ammonia first diffuses to the catalyst surface and adsorbs to form a transition state, and then reacts with nitric oxide in the gas. The specific surface area of the catalyst and the utilization of the catalyst are important for the catalytic reaction. By mixing V2O5-WO3-TiO2The prepared fiber paper catalyst can greatly improve the specific surface area, thereby being beneficial to the high dispersion of the catalyst and improving the catalytic activity.
The invention has the advantages that:
the preparation method has simple process, and prepares the V by directly mixing the active substance, the carrier, the glass fiber and the binder to form slurry, overcoming the traditional impregnation or extrusion forming process and adopting a papermaking process2O5-WO3-TiO2Fibrous paper catalysisThe catalyst greatly improves the specific surface area of the catalyst, thereby improving the dispersibility and activity of the active substances of the catalyst on the surface of a matrix and greatly improving the utilization rate of the catalyst.
Detailed Description
The technical characteristics of the invention are further illustrated below with reference to examples:
example 1:
a vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst, which is prepared from V2O5、WO3、TiO2Glass fiber, SiO2The starch and the clay comprise the following components in percentage by mass: v2O5Is 1%, WO35% of glass fiber, 12% of SiO23 percent of starch, 4 percent of clay and 2 percent of TiO2The balance is; the preparation method takes nano titanium dioxide as a carrier and V2O5As a main catalyst, WO3Is a cocatalyst, glass fiber is a reinforcer, silica sol, starch and clay are binders, and the preparation method adopts the processes of pulping, papermaking, drying and calcining and comprises the following steps:
1) pulping process
Dissolving ammonium metavanadate and ammonium tungstate in deionized water at 60 ℃, stirring for 1h, and adding nano TiO2Anatase powder is stirred for 2 hours to form uniform dispersion liquid, then acidic silica sol is added and stirred uniformly to obtain mixed liquid, starch, clay and glass fiber are added, and stable slurry is obtained after stirring for 10 hours, wherein the solid content in the slurry is 60 wt%, and the solid content in the slurry is as follows: v2O5Is 1 wt%, WO35 wt% of TiO273 wt%, glass fiber 12 wt%, SiO23 wt%, starch 4 wt%, clay 2 wt%;
2) papermaking and catalyst calcining process
Mixing the above slurries, making paper with paper machine, drying with drying roller at 75 deg.C for 30min, and drying V2O5-WO3-TiO2Placing the fiber paper in a muffle furnace at the temperature of 500 DEG CCalcining for 6h to obtain V2O5-WO3-TiO2A fiber paper catalyst. .
The catalyst is at 600ppm SO2In the tail gas, the NO removal rate is 90% under the conditions of the reaction temperature of 300 ℃ and 450 ℃.
Example 2:
a vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst, which is prepared from V2O5、WO3、TiO2Glass fiber, SiO2The starch and the clay comprise the following components in percentage by mass: v2O5Is 1%, WO34% of glass fiber, 10% of SiO21.5 percent of starch, 1.5 percent of clay and TiO2The balance is; the preparation method takes nano titanium dioxide as a carrier and V2O5As a main catalyst, WO3Is a cocatalyst, glass fiber is a reinforcer, silica sol, starch and clay are binders, and the preparation method adopts the processes of pulping, papermaking, drying and calcining and comprises the following steps:
1) pulping process
Dissolving ammonium metavanadate and ammonium tungstate in deionized water at 60 ℃, stirring for 1h, and adding nano TiO2Anatase powder is stirred for 2 hours to form uniform dispersion liquid, then acid silica sol is added and stirred uniformly to obtain mixed liquid, a proper amount of starch, clay and glass fiber are added, and stable slurry is obtained after stirring for 10 hours, wherein the solid content in the slurry is 50 wt%, and the solid content in the slurry is as follows: v2O51.0 wt%, WO34 wt% of TiO280 wt%, glass fiber 10 wt%, SiO21.5 wt%, starch 2 wt%, clay 1.5 wt%;
2) papermaking and catalyst calcining process
Mixing the above slurries, making paper with paper machine, drying with drying roller at 75 deg.C for 30min, and drying V2O5-WO3-TiO2Calcining the fiber paper in a muffle furnace at the temperature of 500 ℃ for 6h to obtain V2O5-WO3-TiO2A fiber paper catalyst. .
The catalyst is at 1500ppm SO2In the tail gas, the NO removal rate is 92% under the conditions of the reaction temperature of 300 ℃ and 450 ℃.
Example 3:
a vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst, which is prepared from V2O5、WO3、TiO2Glass fiber, SiO2The starch and the clay comprise the following components in percentage by mass: v2O5Is 3%, WO38% of glass fiber, 8% of SiO21% of starch, 1% of clay and TiO2The balance is; the preparation method takes nano titanium dioxide as a carrier and V2O5As a main catalyst, WO3Is a cocatalyst, glass fiber is a reinforcer, silica sol, starch and clay are binders, and the preparation method adopts the processes of pulping, papermaking, drying and calcining and comprises the following steps:
1) pulping process
Dissolving ammonium metavanadate and ammonium tungstate in deionized water at 60 ℃, stirring for 1h, and adding nano TiO2Anatase powder is stirred for 2 hours to form uniform dispersion liquid, then acid silica sol is added and stirred uniformly to obtain mixed liquid, a proper amount of starch, clay and glass fiber are added, and stable slurry is obtained after stirring for 10 hours, wherein the solid content in the slurry is 40 wt%, and the solid content in the slurry is as follows: v2O5Is 3 wt%, WO38 wt% of TiO278 wt%, glass fiber 8 wt%, SiO21 wt% starch, 1 wt% clay.
2) Papermaking and catalyst calcining process
Mixing the above slurries, making paper with paper machine, drying with drying roller at 75 deg.C for 30min, and drying V2O5-WO3-TiO2Calcining the fiber paper in a muffle furnace at the temperature of 500 ℃ for 6h to obtain V2O5-WO3-TiO2A fiber paper catalyst.
The catalyst is in800ppm SO2In the tail gas, the NO removal rate is 95% under the conditions of the reaction temperature of 300 ℃ and 450 ℃.
Claims (1)
1. A preparation method of a vanadium pentoxide-tungsten trioxide-titanium dioxide fiber paper catalyst is characterized in that nano titanium dioxide is used as a carrier, and V is used as a carrier2O5As a main catalyst, WO3Is a cocatalyst, glass fiber is a reinforcer, acid silica sol, starch and clay are binders, and the preparation method adopts the processes of pulping, papermaking, drying and calcining and comprises the following steps:
1) pulping process
Dissolving ammonium metavanadate and ammonium tungstate in deionized water at 60 ℃, stirring for 1h, and adding nano TiO2Anatase powder is stirred for 2 hours to form uniform dispersion liquid, then acidic silica sol is added and stirred uniformly to obtain mixed liquid, starch, clay and glass fiber are added, stable slurry is obtained after stirring for 10 hours, and ammonium metavanadate NH is added into the solid mixture of the slurry4VO3Ammonium tungstate, nano TiO2The mass percentages of anatase powder, acid silica sol, starch, clay and glass fiber are calculated according to the following mass ratios: v2O51-3%, WO35-8 percent of glass fiber, 8-12 percent of SiO21-3 percent of starch, 1-4 percent of clay and 1-2 percent of nano TiO2Anatase powder as the rest, and the solid content in the slurry is 40-60 wt%;
2) papermaking and catalyst calcining process
Mixing the above slurries, making paper with paper machine, drying with drying roller at 75 deg.C for 30min, and drying V2O5-WO3-TiO2Calcining the fiber paper in a muffle furnace at the temperature of 500 ℃ for 6h to obtain V2O5-WO3-TiO2A fiber paper catalyst.
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| JP2008307472A (en) * | 2007-06-14 | 2008-12-25 | F C C:Kk | Method of manufacturing catalyst for purification of exhaust gas |
| 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 |
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| CN103877970B (en) * | 2014-03-24 | 2016-04-13 | 中安庆华河北节能环保工程技术有限公司 | A kind of cellular exhaust gas denitration catalyst |
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| JP2008307472A (en) * | 2007-06-14 | 2008-12-25 | F C C:Kk | Method of manufacturing catalyst for purification of exhaust gas |
| 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 |
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