CN106268731A - Raw material for plate-type denitration catalyst and preparation method thereof - Google Patents
Raw material for plate-type denitration catalyst and preparation method thereof Download PDFInfo
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- CN106268731A CN106268731A CN201610688007.6A CN201610688007A CN106268731A CN 106268731 A CN106268731 A CN 106268731A CN 201610688007 A CN201610688007 A CN 201610688007A CN 106268731 A CN106268731 A CN 106268731A
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- catalyst
- raw material
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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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- 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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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/402—Dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- 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
The invention discloses the raw material and preparation method thereof for plate-type denitration catalyst, it includes by weight: 40 50 parts of technical grade titanyl sulfates, 45 55 parts of desalted waters, 23 parts of dispersants and 23 parts of pore creating materials.The invention has the beneficial effects as follows that addition ammonia regulation pH value is beneficial to later stage calcining desulfurization, beneficially shaping of catalyst；The dispersibility shaping of catalyst formula the most below adding dispersant raising raw material spreads upon on wire netting；Add pore creating material and improve the catalysis activity of final catalyst；The specific surface area of catalyst prepared is big, and desulfuration efficiency is high.
Description
Technical field
The present invention relates to field of denitration catalyst, raw material particularly relating to plate-type denitration catalyst and preparation method thereof.
Background technology
Nitrogen oxides (NO, NO2, N2O) is one of main atmosphere pollution.They can produce photochemical fog, acid rain,
Ozone hole and greenhouse effect.Most NOX both is from the bigger enterprise of transport and the coal consumption such as thermal power generation.Therefore control
DS NOx Est is problem demanding prompt solution.China's coal fired power plant has started to apply SCR equipment for denitrifying flue gas at present.
Commercial catalyst divides according to its structure at present mainly flat and corrugated three kinds of honeycomb fashion, wherein corrugated plating
Formula catalyst is later due to the development time, adds the limitation of self structure and preparation technology, is typically only used for dust and contains
Measure relatively low occasion, its whole world power plant market share less than 10%.Most power plant all use flat and honeycomb fashion
Catalyst, both account for more than the 90% of the market share, are the main flows in market.Current flat catalyst and honeycombed catalyst exist
In coal-burning power plant's denitration, share is suitable, and board-like catalyst blocks up and unique advantage in terms of safety at anti-ash, from safety perspective meeting
The board-like catalyst of prioritizing selection, but honeycombed catalyst specific surface area is big, and volume needs amount is little, can prioritizing selection from economy
Cellular catalyst.Cellular catalyst, flat catalyst and corrugated plate dst catalyst mainly come according to its section configuration
Distinguish: cellular catalyst section is rectangle, use active material integral extrusion molding；Flat catalyst is with stainless steel sift
Web plate is that active substance is rolled on carrier surface, leaves a fold every a segment distance；Corrugated plate dst catalyst is then with class
It is similar to work superposed on one another after the fibre board of papery is fabricated to bellows-shaped impregnate the most in the solution after becoming module, be dried and after calcining
Obtain.The main flow of the domestic denitrating catalyst of honeycomb fashion formula, but board-like catalyst has the features such as antidusting ability is strong, fires China
The present situation of the many ashes of flue-gas is appointed and is so had the biggest researching value.
Chinese invention patent application CN201310729404.X discloses Plate-type denitration catalyst, by base material, dioxy
Change titanium, vanadic anhydride, ammonium heptamolybdate, lactic acid, glass fibre and silicon dioxide are constituted, described titanium dioxide, five oxidations two
After vanadium, ammonium heptamolybdate, lactic acid, glass fibre and silica-coating are on base material, sintering forms Plate-type denitration catalyst.Tool
There are advantages such as tool intensity high, wear-resistant, denitration efficiency is high, recoverable, but still have that specific surface area is less, volume needs
Amount is big, causes SCR reactor relatively big, also has higher requirement to supporting, cause SCR denitration engineering initial cost relatively costly.
Summary of the invention
The technical problem to be solved in the present invention is that existing plate-type denitration catalyst specific surface area is less, volume needs amount
Greatly, a kind of raw material for plate-type denitration catalyst and preparation method thereof is provided for this.
The technical scheme is that the raw material for plate-type denitration catalyst, it includes by weight: 40-50 part
Technical grade titanyl sulfate, 45-55 part desalted water, 2-3 part dispersant and 2-3 part pore creating material.
Dispersant described in such scheme is 4wt% ethanolamine, and pore creating material is 4wt% methylcellulose.
For the preparation method of the raw material of plate-type denitration catalyst, it comprises the following steps: prepared by (1), slip: by 40-
50 parts of technical grade titanyl sulfates add 45-55 part desalted water desalted water and are adjusted to the slip of 270-290 g/l；(2), desulfurization is located in advance
Reason: add proper ammonia in slip and make its pH be 11；(3), adjuvant add: in slip add 2-3 part 4wt% ethanolamine and
2-3 part 4wt% methylcellulose；(4), filter pressing calcining: slip is put into pressure filter and carries out pressure filtration molding, then at 350-550 DEG C
Under carry out both having calcined 1-3h.
In step described in such scheme (4), the operating pressure of pressure filter is 8-10kg/cm2, calcining heat is 450-550
℃。
The invention has the beneficial effects as follows that addition ammonia regulation pH value is beneficial to later stage calcining desulfurization, beneficially shaping of catalyst；
The dispersibility shaping of catalyst formula the most below adding dispersant raising raw material spreads upon on wire netting；Add pore creating material to improve
The catalysis activity of whole catalyst；The specific surface area of catalyst prepared is big, and desulfuration efficiency is high.
Detailed description of the invention
The raw material for plate-type denitration catalyst of the present invention, it includes by weight: 40-50 part technical grade sulphuric acid oxygen
Titanium, 45-55 part desalted water, 2-3 part dispersant and 2-3 part pore creating material.
For the preparation method of the raw material of plate-type denitration catalyst, it comprises the following steps: prepared by (1), slip: by 40-
50 parts of technical grade titanyl sulfates add 45-55 part desalted water desalted water and are adjusted to the slip of 270-290 g/l；(2), desulfurization is located in advance
Reason: add proper ammonia in slip and make its pH be 11；(3), adjuvant add: in slip add 2-3 part 4wt% ethanolamine and
2-3 part 4wt% methylcellulose；(4), filter pressing calcining: slip is put into pressure filter and carries out pressure filtration molding, then at 350-550 DEG C
Under carry out both having calcined 1-3h.
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1: for the raw material of plate-type denitration catalyst, it includes by weight: 40 parts of technical grade titanyl sulfates,
45 parts of desalted waters, 2 parts of 4wt% ethanolamine and 2 parts of 4wt% methylcellulose.
For the preparation method of the raw material of plate-type denitration catalyst, it comprises the following steps: prepared by (1), slip: by 40 parts
Technical grade titanyl sulfate adds 45 parts of desalted water desalted waters and is adjusted to the slip of 270 g/l；(2), desulfurization pretreatment: in slip
Adding proper ammonia makes its pH be 11；(3), adjuvant adds: add 2 parts of 4wt% ethanolamine in slip and 2 parts of 4wt% methyl are fine
Dimension element；(4), filter pressing calcining: slip is put into pressure filter and carries out pressure filtration molding, more both carry out calcining 1h at 350 DEG C.
Embodiment 2: for the raw material of plate-type denitration catalyst, it includes by weight: 45 parts of technical grade titanyl sulfates,
50 parts of desalted waters, 2.5 parts of 4wt% ethanolamine and 2.5 parts of 4wt% methylcellulose.
For the preparation method of the raw material of plate-type denitration catalyst, it comprises the following steps: prepared by (1), slip: by 45 parts
Technical grade titanyl sulfate adds 50 parts of desalted water desalted waters and is adjusted to the slip of 280 g/l；(2), desulfurization pretreatment: in slip
Adding proper ammonia makes its pH be 11；(3), adjuvant adds: add 2.5 parts of 4wt% ethanolamine and 2.5 parts of 4wt% first in slip
Base cellulose；(4), filter pressing calcining: slip is put into pressure filter and carries out pressure filtration molding, then carry out both having calcined 2h at 400 DEG C
?.
Embodiment 3: for the raw material of plate-type denitration catalyst, it includes by weight: 50 parts of technical grade sulphuric acid oxygen
Titanium, 55 parts of desalted waters, 3 parts of 4wt% ethanolamine and 3 parts of 4wt% methylcellulose.
For the preparation method of the raw material of plate-type denitration catalyst, it comprises the following steps: prepared by (1), slip: by 50 parts
Technical grade titanyl sulfate adds 55 parts of desalted water desalted waters and is adjusted to the slip of 290 g/l；(2), desulfurization pretreatment: in slip
Adding proper ammonia makes its pH be 11；(3), adjuvant adds: add 3 parts of 4wt% ethanolamine in slip and 3 parts of 4wt% methyl are fine
Dimension element；(4), filter pressing calcining: slip is put into pressure filter and carries out pressure filtration molding, more both carry out calcining 3h at 550 DEG C.
The preference 4 of the present invention: for the raw material of plate-type denitration catalyst, it includes by weight: 45 parts of technical grades
Titanyl sulfate, 50 parts of desalted waters, 2.5 parts of 4wt% ethanolamine and 2.5 parts of 4wt% methylcellulose.
For the preparation method of the raw material of plate-type denitration catalyst, it comprises the following steps: prepared by (1), slip: by 45 parts
Technical grade titanyl sulfate adds 50 parts of desalted water desalted waters and is adjusted to the slip of 280 g/l；(2), desulfurization pretreatment: in slip
Adding proper ammonia makes its pH be 11；(3), adjuvant adds: add 2.5 parts of 4wt% ethanolamine and 2.5 parts of 4wt% first in slip
Base cellulose；(4), filter pressing calcining: slip being put into pressure filter and carries out pressure filtration molding, the operating pressure of pressure filter is 8kg/
cm2, then carry out both having calcined 2h at 450 DEG C.
Preferred embodiment 5: the difference with preferred embodiment 4 is in step (4) that the operating pressure of pressure filter is 10kg/
cm2, then carry out both having calcined 2h at 500 DEG C.
The operating pressure of pressure filter is defined to 8-10 kg/cm2, it is in order to by between the raw material after molding and moisture
Ratio controls in suitable scope, can improve the out of stock efficiency of raw material.
The catalyst raw material static adsorptive method specific surface area measuring instrument measurement the specific area that embodiment 1-5 prepares is gone forward side by side
Row simulates out of stock test, and data measured is as follows:
| Embodiment | Temperature (DEG C) | Specific surface area (m2/ g) | Denitration efficiency (%) |
| 1 | 350 | 163 | 83 |
| 2 | 400 | 142 | 88 |
| 4 | 450 | 131 | 96 |
| 5 | 500 | 115 | 94 |
| 3 | 550 | 91 | 80 |
Test result indicate that calcining heat between 450 DEG C ~ 500 DEG C, now the specific surface area of raw material is at 120 m2/g~130
m2Between/g, and simulation denitration efficiency is best.
Claims (4)
1., for the raw material of plate-type denitration catalyst, it is characterized in that it includes by weight: 40-50 part technical grade sulphuric acid oxygen
Titanium, 45-55 part desalted water, 2-3 part dispersant and 2-3 part pore creating material.
2. the raw material for board-like denox catalyst as claimed in claim 1, is characterized in that described dispersant is 4wt% ethanolamine,
Pore creating material is 4wt% methylcellulose.
3. the preparation method of the raw material for plate-type denitration catalyst as claimed in claim 2, is characterized in that it includes following
Step: prepared by (1), slip: 40-50 part technical grade titanyl sulfate addition 45-55 part desalted water desalted water is adjusted to 270-290
The slip of g/l；(2), desulfurization pretreatment: add proper ammonia in slip and make its pH be 11；(3), adjuvant adds: in slip
Add 2-3 part 4wt% ethanolamine and 2-3 part 4wt% methylcellulose；(4), filter pressing calcining: slip is put into pressure filter and carries out
Pressure filtration molding, then carry out both having calcined 1-3h at 350-550 DEG C.
4. the preparation method of the raw material for plate-type denitration catalyst as claimed in claim 3, is characterized in that described step (4)
The operating pressure of middle pressure filter is 8-10kg/cm2, calcining heat is 450-500 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610688007.6A CN106268731A (en) | 2016-08-19 | 2016-08-19 | Raw material for plate-type denitration catalyst and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610688007.6A CN106268731A (en) | 2016-08-19 | 2016-08-19 | Raw material for plate-type denitration catalyst and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106268731A true CN106268731A (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610688007.6A Pending CN106268731A (en) | 2016-08-19 | 2016-08-19 | Raw material for plate-type denitration catalyst and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100387862B1 (en) * | 2001-01-16 | 2003-06-18 | 현대자동차주식회사 | Diesel oxidation catalyst with high efficiency |
| CN103464139A (en) * | 2013-09-17 | 2013-12-25 | 北京化工大学 | Preparation method of structured flue gas denitrification catalyst |
-
2016
- 2016-08-19 CN CN201610688007.6A patent/CN106268731A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100387862B1 (en) * | 2001-01-16 | 2003-06-18 | 현대자동차주식회사 | Diesel oxidation catalyst with high efficiency |
| CN103464139A (en) * | 2013-09-17 | 2013-12-25 | 北京化工大学 | Preparation method of structured flue gas denitrification catalyst |
Non-Patent Citations (1)
| Title |
|---|
| 郝艳红主编: "《火电厂环境保护》", 31 December 2008, 北京：中国电力出版社 * |
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