CN108905602A - A kind of tin dope composite vanadium-titanium oxides catalyst and preparation method and application - Google Patents
A kind of tin dope composite vanadium-titanium oxides catalyst and preparation method and application Download PDFInfo
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- CN108905602A CN108905602A CN201810527273.XA CN201810527273A CN108905602A CN 108905602 A CN108905602 A CN 108905602A CN 201810527273 A CN201810527273 A CN 201810527273A CN 108905602 A CN108905602 A CN 108905602A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/648—Vanadium, niobium or tantalum or polonium
- B01J23/6482—Vanadium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Abstract
A kind of tin dope composite vanadium-titanium oxides catalyst of the present invention and preparation method and application,It is prepared by homogeneous precipitation and infusion process,Play the synergic catalytic effect in tin dope composite vanadium-titanium oxides catalyst between tin titanium component,Inhibit the crystallization of tin and titanium component,Titanium dioxide in the form of the anatase titanium dioxide for being conducive to denitration reaction mainly to exist,Simultaneously,Concerted catalysis effect between vanadium tin titanium promotes transmitting of the electronics between active component,Catalyst surface oxygen content improves,Promote the absorption and activation of reactant molecule,Make it have good activity and nitrogen selective and anti-sulfur poisonous performance,The active temperature windows of catalyst are widened,With good denitration efficiency,In 300-450 DEG C of wide temperature range,The net conversion ratio of nitrogen oxides is up to 70% or more,90% or more selectivity,It can be used for coal-burning power plant,Industrial Boiler,The removing of the stationary sources such as building materials stove and the mobile source emission nitrogen oxides of diesel vehicle.
Description
Technical field
The invention belongs to nitrogen oxides catalysis reducing materials and technical field of air pollution control, and in particular to a kind of tin is mixed
Miscellaneous composite vanadium-titanium oxides catalyst and preparation method and application.
Background technique
Nitrogen oxides（NOx）It is one of main atmosphere pollution, and causes China various regions acid rain, haze, ozone broken
The big factors of the environmental problems such as bad, emission control have become the research hotspot in environmental catalysis and Atmosphere control field.Ammonia
Gas selective catalytic reduction (Selective Catalytic Reduction, SCR) nitrogen oxides is that current application is the widest
The key of general removal of nitrogen oxide technology, SCR technology is the catalyst of efficient stable.
Currently, industrially applying more mature NH3SCR catalyst is V2O5/TiO2Or in V2O5/TiO2On the basis of
The catalyst being modified, the catalyst temperature window narrows have preferable catalytic performance usually within the scope of 320-400 DEG C,
And TiO2Carrier easily occurs crystal transfer and makes catalyst activity reduction.Therefore, new and effective denitrating catalyst is developed to reality
Existing NOxElimination have very important Significance for Environment, be the urgent need of China's denitration cause.
Summary of the invention
Goal of the invention：To solve problems of the prior art, the present invention provides a kind of tin dope vanadium titanium combined oxidation
Object catalyst and preparation method and application.
Scheme of the invention：To achieve the above object, the invention is realized by the following technical scheme：
A kind of tin dope composite vanadium-titanium oxides catalyst, by the mixing of ammonium metavanadate and oxalic acid that concentration is 0.1-0.3mol/L
Solution, 0-1.6mol/L tin tetrachloride solution and 1-2mol/L titanium sulfate solution are prepared.
Further, the composition of the tin dope composite vanadium-titanium oxides catalyst is expressed as aV/Sn1Tix, and a is vanadium
Load capacity, for 1-5% (w/w), 0≤x≤8.
Further, include the following steps：
Step（1）, weigh appropriate ammonium metavanadate respectively and oxalic acid is dissolved in aseptic deionized water, being configured to concentration is 0.1-
The mixed solution of the ammonium metavanadate of 0.3mol/L and oxalic acid weighs suitable tin tetrachloride and is dissolved in aseptic deionized water, prepares
It is 0-1.6mol/L tin tetrachloride solution at concentration, weighs suitable phthalic acid and be dissolved in aseptic deionized water, is configured to concentration
For the titanium sulfate solution of 1-2mol/L, place spare；
Step（2）, by step（1）Obtained tin tetrachloride solution and titanium sulfate solution mixing, stir 30- at room temperature
90min obtains mixed liquor；
Step（3）, to step（2）Add ammonium hydroxide in gained mixed liquor dropwise while stirring, until pH value is 10-11, is subsequently agitated for one
It fixes time, places spare；
Step（4）, take step（3）Resulting reaction solution is filtered, is washed, is dry, is subsequently placed into Muffle kiln roasting, and tin titanium is made
Composite oxides；
Step（5）, to step（4）Appropriate step is added in the tin titanium composite oxide of acquisition（1）The ammonium metavanadate and grass of preparation
The mixed solution of acid, stirs 2-4h under room temperature；
Step（6）, by step（5）Resulting muddy mixture is dried, and is subsequently placed into Muffle kiln roasting, needed for being made
Tin dope composite vanadium-titanium oxides catalyst.
Further, step（4）In, take step（3）Resulting reaction solution is filtered, is washed, dry under the conditions of 120 DEG C
12-24h is subsequently placed into Muffle furnace, and in 500 DEG C of roasting 4-8h, tin titanium composite oxide is made.
Further, step（6）In, by step（5）Resulting muddy mixture dry 12- under the conditions of 120 DEG C
For 24 hours, it is subsequently placed into Muffle furnace, in 500 DEG C of roasting 4-8h, tin dope composite vanadium-titanium oxides catalyst needed for being made.
Further, include the following steps：It takes appropriate tin dope composite vanadium-titanium oxides catalyst to be placed in continuously to flow
In fixed bed reactors, by mass percentage, the reaction gas in fixed bed reactors includes 0.05%NO, 0.05%NH3With 5%
O2, using N2Balance Air is done, the flow velocity of reaction gas is 300mL/min, air speed 159000h-1, activity rating temperature range is
250-450 DEG C, then test the conversion ratio and nitrogen selective ratio of the nitrogen oxides of catalyst.
Further, for removing the stationary sources such as coal-burning power plant, Industrial Boiler, building materials stove and the mobile source emission of diesel vehicle
Nitrogen oxides, in 300-450 DEG C of temperature, the net conversion ratio of nitrogen oxides is not less than 70%, and nitrogen selective is not less than 90%.
Compared with prior art, beneficial effects of the present invention are：
The invention discloses a kind of tin dope composite vanadium-titanium oxides catalyst and preparation method and application, by homogeneous precipitation and
Infusion process is prepared, and preparation process is simple, plays the association in tin dope composite vanadium-titanium oxides catalyst between tin titanium component
Same catalytic effect plays the strong interaction between two components, it is suppressed that the crystallization of tin and titanium component, titanium dioxide are main
To exist in the form of the anatase titanium dioxide for being conducive to denitration reaction, meanwhile, the concerted catalysis between vanadium tin titanium, which acts on, to be promoted
Into transmitting of the electronics between active component, catalyst surface oxygen content is improved, and promotes the absorption and activation of reactant molecule,
To make it have good activity and nitrogen selective and anti-sulfur poisonous performance, the active temperature window of catalyst has been widened
Mouthful, there is good denitration efficiency, efficient catalytic removing and the nitrogen selective energy of nitrogen oxides are realized in wide temperature range,
There is greater efficiency, especially in 300-450 DEG C of wide temperature range, nitrogen oxidation to ammine selectivity catalytic reduction nitrous oxides
For the net conversion ratio of object up to 70% or more, nitrogen selective reaches 90% or more, can be used for coal-burning power plant, Industrial Boiler, building materials stove
The removing of equal stationary sources and the mobile source emission nitrogen oxides of diesel vehicle.
Detailed description of the invention
Fig. 1 is that the NOx of catalyst of the invention at different temperatures restores conversion rate curve figure；
Fig. 2 is the nitrogen selective curve graph of catalyst of the invention at different temperatures.
Specific embodiment
As shown in Figs. 1-2, a kind of tin dope composite vanadium-titanium oxides catalyst, the inclined vanadium for being 0.1-0.3mol/L by concentration
The mixed solution of sour ammonium and oxalic acid, 0-1.6mol/L tin tetrachloride solution and 1-2mol/L titanium sulfate solution are prepared, and tin is mixed
The composition of miscellaneous composite vanadium-titanium oxides catalyst is expressed as aV/Sn1Tix, and a indicates the load capacity of vanadium, and a is 1-5% (w/w), 0≤x
≤8。
A kind of preparation method of tin dope composite vanadium-titanium oxides catalyst, includes the following steps：
Step（1）, weigh appropriate ammonium metavanadate respectively and oxalic acid is dissolved in aseptic deionized water, being configured to concentration is 0.1-
The ammonium metavanadate of 0.3mol/L and the mixed solution of oxalic acid weigh suitable tin tetrachloride and are dissolved in aseptic deionized water, prepare
It is 0-1.6mol/L tin tetrachloride solution at concentration, weighs suitable phthalic acid and be dissolved in aseptic deionized water, be configured to concentration
For the titanium sulfate solution of 1-2mol/L, place spare；
Step（2）, by step（1）Obtained tin tetrachloride solution and titanium sulfate solution mixing, stir 30- at room temperature
90min obtains mixed liquor；
Step（3）, to step（2）Add ammonium hydroxide in gained mixed liquor dropwise while stirring, until pH value is 10-11, is subsequently agitated for one
It fixes time, places spare；
Step（4）, take step（3）Resulting reaction solution is filtered, is washed, is dry, is subsequently placed into Muffle kiln roasting, and tin titanium is made
Composite oxides；
Step（5）, to step（4）Appropriate step is added in the tin titanium composite oxide of acquisition（1）The ammonium metavanadate and grass of preparation
The mixed solution of acid, stirs 2-4h under room temperature；
Step（6）, by step（5）Resulting muddy mixture is dried, and is subsequently placed into Muffle kiln roasting, needed for being made
Tin dope composite vanadium-titanium oxides catalyst.
Step（4）In, take step（3）Resulting reaction solution is filtered, is washed, dry 12-24h under the conditions of 120 DEG C, then
It is put into Muffle furnace, in 500 DEG C of roasting 4-8h, tin titanium composite oxide is made.
Step（6）In, by step（5）Resulting muddy mixture dry 12-24h under the conditions of 120 DEG C, is subsequently placed into
In Muffle furnace, in 500 DEG C of roasting 4-8h, tin dope composite vanadium-titanium oxides catalyst needed for being made.
Tin dope composite vanadium-titanium oxides catalyst prepared by the present invention be mainly used for remove coal-burning power plant, Industrial Boiler,
The nitrogen oxides of the stationary sources such as building materials stove and the mobile source emission of diesel vehicle.
Embodiment 1
The preparation of 1V/Sn1Ti1 tin dope composite vanadium-titanium oxides catalyst
A) appropriate ammonium metavanadate being weighed respectively and oxalic acid being dissolved in aseptic deionized water, being configured to concentration is the inclined of 0.1mol/L
The mixed solution of ammonium vanadate and oxalic acid weighs suitable tin tetrachloride and is dissolved in aseptic deionized water, and being configured to concentration is
1.6mol/L tin tetrachloride solution weighs suitable phthalic acid and is dissolved in aseptic deionized water, and being configured to concentration is 1mol/L's
Titanium sulfate solution is placed spare；12.50mL, 1.6mol/L tin tetrachloride solution and 20mL, 1mol/L sulphur of preparation are taken respectively
Sour titanium solution, mixing, stirs 30min at room temperature, obtains mixed liquor, spare；
B) by step（a）It is 10 that ammonium hydroxide to pH value, which is added dropwise, in resulting mixed liquor dropwise under constant stirring；
C) by step（b）Resulting reaction solution filters, washing, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, tin titanium composite oxide is made；
D) to step（c）The mixed of 2.221mL, 0.1mol/L ammonium metavanadate and oxalic acid is added in the 2g tin titanium composite oxide of acquisition
Solution is closed, stirs 2-4h under room temperature；
E) step is taken（d）Resulting muddy mixture, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace, 500
4-8h is roasted under the conditions of DEG C, and tin dope type composite vanadium-titanium oxides catalyst is made.
Embodiment 2
The preparation of 1V/Sn1Ti4 tin dope composite vanadium-titanium oxides catalyst
A) appropriate ammonium metavanadate being weighed respectively and oxalic acid being dissolved in aseptic deionized water, being configured to concentration is the inclined of 0.1mol/L
The mixed solution of ammonium vanadate and oxalic acid weighs suitable tin tetrachloride and is dissolved in aseptic deionized water, and being configured to concentration is
0.8309mol/L tin tetrachloride solution weighs suitable phthalic acid and is dissolved in aseptic deionized water, and being configured to concentration is 2mol/L
Titanium sulfate solution, place it is spare；12.0351mL, 0.8309mol/L tin tetrachloride are taken respectively, and 20mL, 2mol/L titanium sulfate are molten
Liquid stirs 30min at room temperature, obtains mixed liquor；
B) by step（a）It is 10 that ammonium hydroxide to pH value, which is added dropwise, in resulting mixed liquor dropwise under constant stirring；
C) by step（b）Resulting reaction solution filters, washing, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, tin titanium composite oxide is made.
D) to 2g step（c）2.221mL, 0.1mol/L ammonium metavanadate and oxalic acid are added in the tin titanium composite oxide of acquisition
Mixed solution stirs 2-4h under room temperature.
E) step is taken（d）Resulting muddy mixture, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, tin dope type composite vanadium-titanium oxides catalyst is made.
Embodiment 3
The preparation of 1V/Sn1Ti8 tin dope composite vanadium-titanium oxides catalyst
A) appropriate ammonium metavanadate being weighed respectively and oxalic acid being dissolved in aseptic deionized water, being configured to concentration is the inclined of 0.1mol/L
The mixed solution of ammonium vanadate and oxalic acid weighs suitable tin tetrachloride and is dissolved in aseptic deionized water, and being configured to concentration is
0.4mol/L tin tetrachloride solution weighs suitable phthalic acid and is dissolved in aseptic deionized water, and being configured to concentration is 2mol/L's
Titanium sulfate solution is placed spare；12.50mL, 0.4 mol/L tin tetrachloride respectively, 20mL, 2mol/L titanium sulfate solution, in room
30min is stirred under the conditions of temperature, obtains mixed liquor；
B) by step（a）It is 10 that ammonium hydroxide to pH value, which is added dropwise, in resulting mixed liquor dropwise under constant stirring；
C) by step（b）Resulting reaction solution filters, washing, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, tin titanium composite oxide is made；
D) to 2g step（c）2.221mL, 0.1mol/L ammonium metavanadate and oxalic acid mixing are added in the tin titanium composite oxide of acquisition
Solution stirs 2-4h under room temperature；
E) step is taken（d）Resulting muddy mixture, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace, 500
4-8h is roasted under the conditions of DEG C, and tin dope type composite vanadium-titanium oxides catalyst is made.
Embodiment 4
The preparation of 1V/Ti tin dope composite vanadium-titanium oxides catalyst
A) appropriate ammonium metavanadate being weighed respectively and oxalic acid being dissolved in aseptic deionized water, being configured to concentration is the inclined of 0.1mol/L
The mixed solution of ammonium vanadate and oxalic acid weighs suitable titanium sulfate and is dissolved in aseptic deionized water, and being configured to concentration is 1.5mol/
The titanium sulfate solution of L is placed spare；33.33mL, 1.5mol/L titanium sulfate solution are taken respectively, are stirred at room temperature
30min obtains mixed liquor；
B) by step（a）It is 10 that ammonium hydroxide to pH value, which is added dropwise, in resulting mixed liquor dropwise under constant stirring；
C) by step（b）Resulting reaction solution filters, washing, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, titanium oxide is made；
D) to 2g step（c）2.221mL, 0.1mol/L ammonium metavanadate and oxalic acid mixed solution are added in the titanium oxide of acquisition,
2-4h is stirred under room temperature；
E) step is taken（d）Resulting muddy mixture, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace, 500
4-8h is roasted under the conditions of DEG C, and composite vanadium-titanium oxides catalyst is made.
Embodiment 5
The preparation of 3V/Sn1Ti4 tin dope composite vanadium-titanium oxides catalyst
A) appropriate ammonium metavanadate being weighed respectively and oxalic acid being dissolved in aseptic deionized water, being configured to concentration is the inclined of 0.2mol/L
The mixed solution of ammonium vanadate and oxalic acid weighs suitable tin tetrachloride and is dissolved in aseptic deionized water, and being configured to concentration is
0.8309mol/L tin tetrachloride solution weighs suitable phthalic acid and is dissolved in aseptic deionized water, and being configured to concentration is 2mol/L
Titanium sulfate solution, place it is spare；12.0351mL, 0.8309mol/L tin tetrachloride are taken respectively, and 20mL, 2mol/L titanium sulfate are molten
Liquid stirs 30min at room temperature, obtains mixed liquor；
B) by step（a）It is 10 that ammonium hydroxide to pH value, which is added dropwise, in resulting mixed liquor dropwise under constant stirring；
C) by step（b）Resulting reaction solution filters, washing, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, tin titanium composite oxide is made.
D) to 2g step（c）2.267mL, 0.2mol/L ammonium metavanadate and oxalic acid are added in the tin titanium composite oxide of acquisition
Mixed solution stirs 2-4h under room temperature.
E) step is taken（d）Resulting muddy mixture, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, tin dope type composite vanadium-titanium oxides catalyst is made.
Embodiment 6
The preparation of 5V/Sn1Ti4 tin dope composite vanadium-titanium oxides catalyst
A) appropriate ammonium metavanadate being weighed respectively and oxalic acid being dissolved in aseptic deionized water, being configured to concentration is the inclined of 0.3mol/L
The mixed solution of ammonium vanadate and oxalic acid weighs suitable tin tetrachloride and is dissolved in aseptic deionized water, and being configured to concentration is
0.8309mol/L tin tetrachloride solution weighs suitable phthalic acid and is dissolved in aseptic deionized water, and being configured to concentration is 2mol/L
Titanium sulfate solution, place it is spare；12.0351mL, 0.8309mol/L tin tetrachloride are taken respectively, and 20mL, 2mol/L titanium sulfate are molten
Liquid stirs 30min at room temperature, obtains mixed liquor；
B) by step（a）It is 10 that ammonium hydroxide to pH value, which is added dropwise, in resulting mixed liquor dropwise under constant stirring；
C) by step（b）Resulting reaction solution filters, washing, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, tin titanium composite oxide is made.
D) to 2g step（c）2.267mL, 0.3mol/L ammonium metavanadate and oxalic acid are added in the tin titanium composite oxide of acquisition
Mixed solution stirs 2-4h under room temperature.
E) step is taken（d）Resulting muddy mixture, dry 12-24h under the conditions of 120 DEG C, then in Muffle furnace,
4-8h is roasted under the conditions of 500 DEG C, tin dope type composite vanadium-titanium oxides catalyst is made.
Embodiment 7
Preparing for catalyst is same as Example 2, and the applying step of tin dope composite vanadium-titanium oxides catalyst is：Take 0.12g
Tin dope composite vanadium-titanium oxides catalyst is placed in the fixed bed reactors continuously flowed, and the composition of reaction gas presses quality percentage
Number meter, including 0.05%NO, 0.05%NH3、5%O2, use N2Balance Air is done, the flow velocity of reaction gas is 300mL/min, and air speed is
159000h-1（It is recommended that being set as proper range）, activity rating temperature range is 250-450 DEG C, then tests catalyst in difference
At a temperature of nitrogen oxides NOxConversion ratio, that is, denitrification percent and nitrogen selective ratio, as depicted in figs. 1 and 2, at 300-450 DEG C
In temperature, the net conversion ratio of nitrogen oxides is not less than 70%, and nitrogen selective is not less than 90%.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of tin dope composite vanadium-titanium oxides catalyst, which is characterized in that the metavanadic acid for being 0.1-0.3mol/L by concentration
The mixed solution of ammonium and oxalic acid, 0-1.6mol/L tin tetrachloride solution and 1-2mol/L titanium sulfate solution are prepared.
2. a kind of tin dope composite vanadium-titanium oxides catalyst according to claim 1, which is characterized in that the tin dope
The composition of composite vanadium-titanium oxides catalyst is expressed as aV/Sn1Tix, and a indicates the load capacity of vanadium, and a is 1-5% (w/w), and 0≤x≤
8。
3. a kind of preparation method of tin dope composite vanadium-titanium oxides catalyst, which is characterized in that include the following steps：
Step（1）, ammonium metavanadate and oxalic acid that compound concentration is 0.1-0.3mol/L mixed solution, concentration 0-1.6mol/L
Tin tetrachloride solution, the titanium sulfate solution that concentration is 1-2mol/L, are placed spare；
Step（2）, by step（1）Obtained tin tetrachloride solution and titanium sulfate solution mixing, stir 30- at room temperature
90min obtains mixed liquor；
Step（3）, to step（2）Add ammonium hydroxide in gained mixed liquor dropwise while stirring, adjusts pH value to 10-11, be subsequently agitated for
Certain time places spare；
Step（4）, take step（3）Resulting reaction solution is filtered, is washed, is dry, is subsequently placed into Muffle kiln roasting, and tin titanium is made
Composite oxides；
Step（5）, to step（4）Appropriate step is added in the tin titanium composite oxide of acquisition（1）The ammonium metavanadate and grass of preparation
The mixed solution of acid, stirs 2-4h under room temperature；
Step（6）, by step（5）Resulting muddy mixture is dried, and is subsequently placed into Muffle kiln roasting, needed for being made
Tin dope composite vanadium-titanium oxides catalyst.
4. a kind of preparation method of tin dope composite vanadium-titanium oxides catalyst according to claim 3, which is characterized in that
Step（4）In, take step（3）Resulting reaction solution is filtered, is washed, and dry 12-24h, is subsequently placed into Muffle furnace at 120 DEG C
In, in 500 DEG C of roasting 4-8h, tin titanium composite oxide is made.
5. a kind of preparation method of tin dope composite vanadium-titanium oxides catalyst according to claim 3, which is characterized in that
Step（6）In, by step（5）Resulting muddy mixture dry 12-24h under the conditions of 120 DEG C, is subsequently placed into Muffle furnace
In, in 500 DEG C of roasting 4-8h, tin dope composite vanadium-titanium oxides catalyst needed for being made.
6. a kind of application of tin dope composite vanadium-titanium oxides catalyst according to claim 1 or 2, which is characterized in that
Include the following steps：Appropriate tin dope composite vanadium-titanium oxides catalyst is taken to be placed in the fixed bed reactors continuously flowed, instead
Gas bag is answered to include NO, NH3And O2, using N2Balance Air is done, the flow velocity of reaction gas is 300mL/min, air speed 159000h-1, activity
Evaluation temperature range is 250-450 DEG C, then tests the denitrification percent and nitrogen selective ratio of catalyst.
7. a kind of application of tin dope composite vanadium-titanium oxides catalyst according to claim 6, which is characterized in that be used for
The nitrogen oxides for removing the stationary sources such as coal-burning power plant, Industrial Boiler, building materials stove and the mobile source emission of diesel vehicle, in 300-450
In DEG C temperature, the net conversion ratio of nitrogen oxides is not less than 70%, and nitrogen selective is not less than 90%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111437814A (en) * | 2020-05-08 | 2020-07-24 | 清华大学盐城环境工程技术研发中心 | Tin-doped platinum-titanium catalyst and preparation method and application thereof |
| CN114505066A (en) * | 2022-01-27 | 2022-05-17 | 中国建筑材料科学研究总院有限公司 | Denitration catalyst, preparation method thereof and denitration method |
| CN115869989A (en) * | 2022-09-27 | 2023-03-31 | 中国船舶重工集团公司第七一八研究所 | Preparation method of low-temperature denitration catalyst for tail gas of marine diesel engine |
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| CN115869989A (en) * | 2022-09-27 | 2023-03-31 | 中国船舶重工集团公司第七一八研究所 | Preparation method of low-temperature denitration catalyst for tail gas of marine diesel engine |
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