CN106362761A - Preparation method for denitration catalyst - Google Patents
Preparation method for denitration catalyst Download PDFInfo
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- CN106362761A CN106362761A CN201610638271.9A CN201610638271A CN106362761A CN 106362761 A CN106362761 A CN 106362761A CN 201610638271 A CN201610638271 A CN 201610638271A CN 106362761 A CN106362761 A CN 106362761A
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- preparation
- denitrating catalyst
- stirred tank
- denitration catalyst
- ammonia
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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
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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
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/888—Tungsten
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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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention specifically relates to a preparation method for a denitration catalyst, belonging to the field of manufacturing of catalysts. The preparation method comprises the following steps: (1) weighing 80 to 100 g of titanium dioxide, 5 to 10 g of tungsten trioxide, 40 to 70 g of deionized water and 3 to 8 g of ammonia water, adding the weighed materials into an agitation vessel at the same time and carrying out stirring; (2) adding 8 to 15 g of ferric nitrate and 8 to 15 g of antimony nitrate into the agitation vessel and successively carrying out heating, uniform mixing and dehumidification; and (3) adding 0.05 to 0.3 g of polyoxyethylene, 0.05 to 0.3 g of carboxymethyl cellulose and 1 to 5 g of ammonia water into the agitation vessel, carrying out dehumidification while stirring and accomplishing mixing so as to obtain the denitration catalyst. Compared with conventional denitration catalyst, the denitration catalyst provided by the invention has the advantages that the denitration catalyst has high catalytic activity and no toxicity; burying or burning of the denitration catalyst is applicable; the waste denitration catalyst is convenient to treat; and the preparation method is simple and can be easily industrialized.
Description
Technical field
The present invention relates to catalyst manufactures field and in particular to a kind of preparation method of denitrating catalyst.
Background technology
Based on coal, coal-burning power plant produces substantial amounts of dust, so to the energy resource structure of China in process of productionx、noxWith
Harmful metal elements etc..Nitrogen oxides (the no of discharge in flue gasx) even more serious to the hazard ratio sulfide of environment, in air
noxAcid rain, photochemical fog, earth's surface water eutrophication etc. can be caused to destroy ecological environment and jeopardize a series of of human health and ask
Topic.
Selective catalytic reduction (selective catalytic reduction, scr) is relatively low with its reaction temperature,
Purifying rate is high, reliable, the advantages of secondary pollution is little, has become removing no in developed countryxPrefered method.In scr skill
In art, catalyst is core, and its cost accounts for this 20%～40% of scr system synthesis, and the performance of catalyst directly affects nox
Removal effect.
Vanadium titanium system denitrating catalyst belongs to scr denitration technology, has in selective denitrification field and is widely applied very much, its feature
For activity is high, life-span length, but its active substance vanadic anhydride belongs to extremely toxic substance, can cause nose, pharynx, pulmonary's stimulation disease
Shape, 2014, waste and old denitrating catalyst was classified as hazardous solid waste by national environmental protection portion, and one of its reason is exactly that waste and old denitration is urged
Agent arbitrarily abandons, and has Leaching.So working out, a kind of nontoxic denitrating catalyst is significant and market prospect.
Content of the invention
The present invention is directed to the deficiency in prior art, there is provided a kind of preparation method of nontoxic denitrating catalyst.
In order to solve above-mentioned technical problem, the technical scheme is that
A kind of preparation method of denitrating catalyst of the present invention, operates according to the following steps:
(1) weigh 80-100g titanium dioxide, 5-10g Tungstic anhydride., 40-70g deionized water and 3-8g ammonia, simultaneously plus
Enter in stirred tank and be stirred；
(2) 8-15g ferric nitrate and 8-15g nitric acid antimony, after intensification, dehumidifier are added again in stirred tank；
(3) 0.05-0.3g polyethylene glycol oxide, 0.05-0.3g carboxymethyl cellulose and 1-5g ammonia are added again in stirred tank
Water, stirring carries out dehumidifier simultaneously, completes to knead, obtains denitrating catalyst.
Further, in order that catalyst activity is higher, in step (1), the preferred anatase titanium dioxide of titanium dioxide.
Further, in order that more preferably playing concerted catalysis effect between raw material, in step (1), the preferred 100g of titanium dioxide,
The preferred 9g of Tungstic anhydride., the preferred 5g of ammonia.
Further, in order that Dispersion of Solute Matter evenly, in step (1), ammonia mass fraction be 15-30%, stirred tank
Stir speed (S.S.) be 20-40hz, the mixing time of stirred tank is 40-80min.
Further, in step (1), ammonia mass fraction preferably 20%, the preferred 30hz of stir speed (S.S.) of stirred tank, stirring
The preferred 60min of mixing time of kettle.
Further, in order that each raw material reaction is more abundant, in step (2), warming temperature is 60-100 DEG C, and dehumidifier is to water
Divide and be down to 20-40%.
Further, in step (2), the preferred 12g of ferric nitrate, the preferred 13g of nitric acid antimony, preferably 80 DEG C of warming temperature, dehumidifier
Moisture is preferably dropped to 20%.
Further, in order that each raw material plays one's part to the full, in step (3), while stirring, it is kept stirring for kettle interior temperature
Degree is less than 80 DEG C.
Further, in step (3), the mass fraction of ammonia is 10-30%, and mixing time is 20-50min.
Further, in order to ensure the reactivity of each raw material and catalyst, in step (3), dehumidifier is less than to moisture
40%, when in stirred tank, solution ph is more than 8.0, complete to knead.
Compared with the conventional method, the invention has the advantages that, in last product denitrating catalyst, iron sesquioxide and
Antimony oxide, have substantial amounts of acidity active sites, can strong adsorption ammonia molecule, weaken n-h molecular bond strength, significantly carry
The high reaction rate with nitrogen oxides for the ammonia；Iron sesquioxide and antimony oxide belong to innocuous substance simultaneously, can be filled out
Bury or burn, spent catalyst is easy to process；This scheme is simple, easy industrialization.
Specific embodiment
The invention is further illustrated by the following examples, but the present invention is not limited only to following examples.
Embodiment 1
Weigh 100g titanium dioxide, 9g Tungstic anhydride., 54g deionized water and ammonia 5g that mass fraction is 30%, simultaneously
Add in stirred tank and be stirred, the stir speed (S.S.) of setting stirred tank is 30hz, stirs 60min.
Then add 12g ferric nitrate and 13g nitric acid antimony in stirred tank again, be warmed up to 80 DEG C, mix homogeneously, dehumidifier is to water
Divide and be down to 28%.
Adding 0.1g polyethylene glycol oxide, 0.1g carboxymethyl cellulose and mass fraction again in above-mentioned stirred tank is 20%
Ammonia 2g, stirring carries out dehumidifier simultaneously, stirs 30min, when dehumidifier to moisture is less than 26%, ph more than 8.6, completes to knead, obtains
Denitrating catalyst.
Embodiment 2
Weigh 80g titanium dioxide, 10g Tungstic anhydride., 40g deionized water and ammonia 3g that mass fraction is 25%, simultaneously
Add in stirred tank and be stirred, the stir speed (S.S.) of setting stirred tank is 20hz, stirs 80min.
Then add 8g ferric nitrate and 15g nitric acid antimony in stirred tank again, be warmed up to 100 DEG C, mix homogeneously, dehumidifier is to water
Divide and be down to 40%.
Adding 0.05g polyethylene glycol oxide, 0.3g carboxymethyl cellulose and mass fraction again in above-mentioned stirred tank is 10%
Ammonia 5g, stirring carries out dehumidifier simultaneously, stirs 50min, when dehumidifier to moisture is less than 30%, ph and is more than 8, completes to knead, obtains
Denitrating catalyst.
Embodiment 3
Weigh 90g titanium dioxide, 5g Tungstic anhydride., 70g deionized water and ammonia 8g that mass fraction is 15%, simultaneously plus
Enter in stirred tank and be stirred, the stir speed (S.S.) of setting stirred tank is 40hz, stirs 40min.
Then add 15g ferric nitrate and 8g nitric acid antimony in stirred tank again, be warmed up to 60 DEG C, mix homogeneously, dehumidifier is to water
Divide and be down to 20%.
Adding 0.3g polyethylene glycol oxide, 0.05g carboxymethyl cellulose and mass fraction again in above-mentioned stirred tank is 30%
Ammonia 1g, stirring carries out dehumidifier simultaneously, stirs 20min, when dehumidifier to moisture is less than 40%, ph and is more than 8.4, completes to knead,
Obtain denitrating catalyst.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of preparation method of denitrating catalyst is it is characterised in that comprise the steps:
(1) weigh 80-100g titanium dioxide, 5-10g Tungstic anhydride., 40-70g deionized water and 3-8g ammonia, be simultaneously introduced and stir
Mix in kettle and be stirred；
(2) 8-15g ferric nitrate and 8-15g nitric acid antimony are added in stirred tank again, after intensification, mix homogeneously, dehumidifier；
(3) add 0.05-0.3g polyethylene glycol oxide, 0.05-0.3g carboxymethyl cellulose and 1-5g ammonia in stirred tank again, stir
Mix and carry out dehumidifier simultaneously, complete to knead, obtain denitrating catalyst.
2. according to claim 1 a kind of preparation method of denitrating catalyst it is characterised in that in step (1), described dioxy
Change titanium is anatase titanium dioxide.
3. according to claim 1 a kind of preparation method of denitrating catalyst it is characterised in that in step (1), described dioxy
Change titanium is 100g, described Tungstic anhydride. is 9g, described deionized water is 54g, and described ammonia is 5g.
4. according to claim 1 a kind of preparation method of denitrating catalyst it is characterised in that in step (1), described ammonia
Mass fraction be 15-30%；The stir speed (S.S.) of described stirred tank is 20-40hz, and the mixing time of described stirred tank is 40-
80min.
5. according to claim 4 a kind of preparation method of denitrating catalyst it is characterised in that in step (1), described ammonia
Mass fraction be 20%；The stir speed (S.S.) of described stirred tank is 30hz, and the mixing time of described stirred tank is 60min.
6. according to claim 1 a kind of preparation method of denitrating catalyst it is characterised in that in step (2), described intensification
Temperature is 60-100 DEG C；Described dehumidifier is down to 20-40% to moisture.
7. according to claim 6 a kind of preparation method of denitrating catalyst it is characterised in that in step (2), described nitric acid
Ferrum is 12g, and described nitric acid antimony is 13g, and described warming temperature is 80 DEG C, and described dehumidifier is down to 28% to moisture.
8. according to claim 1 a kind of preparation method of denitrating catalyst it is characterised in that in step (3), described stirring
While ensure stirring temperature in the kettle be less than 80 DEG C.
9. according to claim 1 a kind of preparation method of denitrating catalyst it is characterised in that in step (3), described ammonia
Mass fraction is 10-30%, and mixing time is 20-50min.
10. a kind of preparation method of denitrating catalyst it is characterised in that in step (3), described is taken out according to claim 1
Wet to moisture be less than 40%, in stirred tank solution ph be more than 8.0 when, complete described mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610638271.9A CN106362761A (en) | 2016-08-05 | 2016-08-05 | Preparation method for denitration catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610638271.9A CN106362761A (en) | 2016-08-05 | 2016-08-05 | Preparation method for denitration catalyst |
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| CN106362761A true CN106362761A (en) | 2017-02-01 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004024472A (en) * | 2002-06-25 | 2004-01-29 | Mitsubishi Heavy Ind Ltd | Deodorizer and deodorizing method |
| CN102416333A (en) * | 2011-11-11 | 2012-04-18 | 中国科学院广州能源研究所 | Special tungsten-containing nano titanium dioxide for flue gas denitration catalyst and manufacturing method thereof |
| CN103495424A (en) * | 2013-09-30 | 2014-01-08 | 山东爱亿普环保科技有限公司 | Flue gas SCO denitration catalyst and preparation method thereof |
-
2016
- 2016-08-05 CN CN201610638271.9A patent/CN106362761A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004024472A (en) * | 2002-06-25 | 2004-01-29 | Mitsubishi Heavy Ind Ltd | Deodorizer and deodorizing method |
| CN102416333A (en) * | 2011-11-11 | 2012-04-18 | 中国科学院广州能源研究所 | Special tungsten-containing nano titanium dioxide for flue gas denitration catalyst and manufacturing method thereof |
| CN103495424A (en) * | 2013-09-30 | 2014-01-08 | 山东爱亿普环保科技有限公司 | Flue gas SCO denitration catalyst and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 曹政: "改性钒钛催化剂低温催化还原NOx性能研究", 《中国优秀硕士学位论文全文数据库工程科技I辑》 * |
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Application publication date: 20170201 |
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