CN105013540A - Marine denitration catalyst and preparation method therefor - Google Patents
Marine denitration catalyst and preparation method therefor Download PDFInfo
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Abstract
The invention relates to a marine denitration catalyst and a preparation method therefor, and belongs to the field of denitration catalysts. The marine denitration catalyst disclosed by the invention uses nanometer titania and diatomite as carriers and loaded lanthanum oxide, ceric oxide and manganese dioxide as active centers, and a polymeric additive is added, so that the denitration catalyst can develop the catalytic activity at the temperature of 160-200 DEG C, and the disadvantages caused by ammonia additives can be avoided. Through the addition of the peracid polystyrene polymeric additive, the marine denitration catalyst has good denitration performance and good desulfurization performance, and the catalyst is prevented from poisoning in a high-sulfur atmosphere. The denitration under the condition of lower energy consumption is realized, the energy consumption is reduced, the blockage of catalyst porous channels can also be prevented, and the service life of the catalyst is prolonged. The preparation method of the marine denitration catalyst disclosed by the invention is simple, convenient and practicable, and the production efficiency is high.
Description
Technical field
The present invention relates to a kind of denitrating catalyst peculiar to vessel and preparation method thereof, belong to field of denitration catalyst.
Background technology
1997 International Maritime Organization (IMO) held MARPOL73/78 conference of states parties in IMO general headquarters London, have approved newly-increased supplemental provisions of MARPOL73/78 pact, i.e. supplemental provisions VI " prevent boats and ships from causing atmosphere pollution rule ".The appearance of this rule, facilitate the appearance of the more strict local discharge standard of some developed countries and control plan, such as Sweden requires domestic boats and ships NO
xemission control is 2g/ (kWh), and this standard must just can reach by equip the ship exhaust gas purification equipment; The target of Norway is that domestic navigation reduces by 10000 tons of NO every year
x; Baltic Sea country has all put into effect similar control plan.The U.S. is to some coastal waters, as littoral in California etc., NO when having implemented 15% oxygen
xdischarge is limited in 100 × 10
-6or lower regulation, Environmental Protection Agency USA (EPA) proposes that boats and ships such as the hope that navigation controls waters at EPA is paid minimum " usage charges ", then must by diesel engine vent gas NO
xemission level reduces by 80% or lower, this means that boats and ships must equip exhaust gas purification equipment.But also do not have suitable ship tail gas cleaning equipment available at present.The selective catalytic reduction (SCR) being reducing agent with urea (ammonia) once in the nineties in last century, some boats and ships was applied, but SCR equipment is huge, initial cost and operating cost high, also there is the accumulating of ammonia and the discharge beyond standards problem of ammonia, particularly there is the SO in tail gas
2and NH
3the blocking of ammonium sulfate to catalytic reactor passage that reaction generates and the pollution problem to catalyst, all these determine the method and are not suitable for marine vessel applications.
Along with the increasingly stringent of diesel engine emissions regulations, post-processing technology meets the technical measures that Europe IV and above Abgasgesetz must adopt.After 2010, diesel vehicle state IV standard is implemented in state plan in 3 years, this proposes great challenge to EGR technology.EGR technology is difficult to adapt to the stricter emission request of diesel vehicle, and SCR then can meet state IV and state V discharge standard, and therefore SCR technology becomes market development main flow.SCR technology is called as the popular and outer Exhaust Control for Diesel Engine technology of machine widely at present.Full name is SCR technology, and its converter has very strong selective, and mainly for the emission control of NOx, the reducing agent of its restoring system can with various Ammonia material or various HC.
It closes key mapping denitrification apparatus SCR denitration used, but denitrating catalyst Applicable temperature mainly concentrates on more than 300 DEG C at present, and the reaction temperature of denitration peculiar to vessel requires more than 200 DEG C, the denitration efficiency of catalyst common like this when 200-300 DEG C does not just reach applicable requirement.
The present invention proposes a kind of denitrating catalyst peculiar to vessel, with nano titanium oxide and diatomite for carrier, lanthanum oxide-carrying, ceria, manganese dioxide are activated centre, and add polymeric additive, make this denitrating catalyst can play catalytic activity at 160-200 DEG C, and the shortcoming that Ammonia additive brings can be avoided.Realize carrying out denitration when energy consumption is lower, both reduced energy consumption, and can prevent again catalyst duct from blocking, improve catalyst life.
Summary of the invention
Energy consumption is reduced for realizing carrying out denitration when energy consumption is lower, can prevent again catalyst duct from blocking, improve catalyst life, the invention provides a kind of denitrating catalyst peculiar to vessel and preparation method thereof, there is the advantages such as high activity, low toxicity, good hydrothermal stability, and there is higher NO in low temperature environment
xremove active.
The present invention is achieved by the following technical solutions:
With nano titanium oxide and diatomite for carrier, lanthanum oxide-carrying, ceria, manganese dioxide are activated centre, and add polymeric additive.
Denitrating catalyst peculiar to vessel of the present invention is obtained by the component of following weight portion:
Nano titanium oxide 25-30 part;
Diatomite 18-25 part;
Ceria 10-20 part;
Lanthana 8-12 part;
Manganese dioxide 6-13 part;
Lubricant 10-15 part;
Binding agent 6-16 part;
Plasticiser 1.5-3 part;
Anti-wear agent 6-14 part;
Surfactant 2-8 part;
Peroxy acid polystyrene 12-20 part.
Wherein said lubricant is made up of the component of following weight portion:
White carbon 5-8 part;
Talcum powder 5-7 part.
Wherein said binding agent is made up of the component of following weight portion:
Bentonite 2-7 part;
Dolomite 2-4 part;
A-cyanoacrylate 2-5 part.
Wherein said plasticiser is made up of the component of following weight portion:
Phthalic acid two (2-ethyl hexyl) ester 1-2 part;
Repefral 0.5-1 part.
Wherein said anti-wear agent is made up of the component of following weight portion:
Polytetrafluorethylepowder powder 4-8 part;
Polyethylene glycol succinate fiber 2-6 part.
Wherein said surfactant is made up of the component of following weight portion:
Tween-60 1-3 part;
Polyethenoxy ether sodium sulfate 1-5 part.
Wherein said peroxy acid polystyrene, prepared by following steps:
Take 12.3-22.9g polystyrene, add there-necked flask, drip 1-2 and drip the concentrated sulfuric acid, then measure 10-15ml hydrogen peroxide, add there-necked flask in 20-30min, at 40-60 DEG C, react 3-6h, stop reaction, stratification, and be separated subnatant with separatory funnel, be peroxy acid polystyrene.
The preparation technology of a kind of denitrating catalyst peculiar to vessel of the present invention is as follows:
(1) get 25-30 part nano titanium oxide and 18-25 part diatomite, at 60-80 DEG C of vacuum oven 5-8h, be cooled to room temperature;
(2) 13-26 part cerous nitrate, 22-30 part lanthanum nitrate and 13-18 part manganese nitrate is taken, add mixing kettle, 15.6-26.2L water is added mixing kettle gradually, and open stirring, after stirring 1-2h with the speed of 100-200r/min, add nano titanium oxide and HTS that in step (1), pretreatment is good, continue to stir 2-3h;
(3) by the said goods, put into Muffle furnace, at 400-600 DEG C, calcine 4-6h, obtain corresponding oxide active center: ceria, lanthana and manganese dioxide;
(4) in said components, interpolation 5-8 part white carbon, 5-7 part talcum powder, 2-7 part bentonite, 2-4 part dolomite, 2-5 part a-cyanoacrylate, 1-2 part phthalic acid two (2-ethyl hexyl) ester, 0.5-1 part repefral, 4-8 part polytetrafluorethylepowder powder, 2-6 part polyethylene glycol succinate fiber, 1-3 part Tween-60,1-5 part polyethenoxy ether sodium sulfate carry out mixing successively, and material is evenly mixing;
(5), by mixing material out, after slaking 12-24h, join to filter in pre-extruded and extrude, filter impurity in removing material;
(6) extrusion molding: by filtering the material after pre-extruded, by mold integral extrusion molding, and carry out drying process;
(7) the said goods is immersed in 12-20 part high molecular polymerization additive peroxy acid polystyrene, after soaking 6-12h under normal temperature, carry out drying process;
(8) according to the length of regulation, above-mentioned finished product is cut, and carries out front end hardened artiwear process;
(9) packaging product.
the beneficial effect that the present invention has is:
1, the present invention proposes a kind of denitrating catalyst peculiar to vessel, with nano titanium oxide and diatomite for carrier, lanthanum oxide-carrying, ceria, manganese dioxide are activated centre, and add polymeric additive, make this denitrating catalyst can play catalytic activity at 160-200 DEG C, and the shortcoming that Ammonia additive brings can be avoided.
2, Nano titanium dioxide is carrier, and have higher specific area, applicable pore structure and water absorption rate, have stronger mechanical strength and stability, heat resistance, acid resistance are good.Diatomite itself has excellent catalytic performance, after interacting, more can increase its catalytic activity with titanium dioxide;
3, the adding of peroxy acid polystyrene polymeric additive, make denitrating catalyst peculiar to vessel not only have good denitration performance, also there is good desulfurization performance, prevent catalyst poisoning in high-sulfur atmosphere;
4, denitrating catalyst of the present invention can reduce the catalytic temperature of denitrating catalyst, makes this denitrating catalyst can play catalytic activity at 160-200 DEG C.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described, and specific embodiment does not limit the present invention.
embodiment 1
The invention provides a kind of denitrating catalyst peculiar to vessel and preparation method thereof, obtained by the component of following weight portion:
Nano titanium oxide 25 parts;
18 parts, diatomite;
Ceria 10 parts;
Lanthana 8 parts;
Manganese dioxide 6 parts;
White carbon 5 parts;
Talcum powder 5 parts;
Bentonite 2 parts;
Dolomite 2 parts;
A-cyanoacrylate 2 parts;
Phthalic acid two (2-ethyl hexyl) ester 1 part;
Repefral 0.5 part;
Polytetrafluorethylepowder powder 4 parts;
Polyethylene glycol succinate fiber 2 parts;
Tween-60 1 part;
Polyethenoxy ether sodium sulfate 1 part;
Peroxy acid polystyrene 12 parts.
The preparation technology of a kind of denitrating catalyst peculiar to vessel of the present invention is as follows:
(1) get 25 parts of nano titanium oxides and 18 parts of diatomite, at 60 DEG C of vacuum oven 8h, be cooled to room temperature;
(2) take 13 parts of cerous nitrates, 22 parts of lanthanum nitrates and 13 parts of manganese nitrates, add mixing kettle, 15.6L water is added mixing kettle gradually, and open stirring, after stirring 1h with the speed of 100r/min, add nano titanium oxide and HTS that in (1), pretreatment is good, continue to stir 2h;
(3) by the said goods, put into Muffle furnace, at 400 DEG C, calcine 4h, obtain corresponding oxide active center: ceria, lanthana and manganese dioxide;
(4) in said components, adding 5 parts of white carbons, 5 parts of talcum powder, 2 parts of bentonites, 2 parts of dolomites, 2 parts of a-cyanoacrylates, 1 part of phthalic acid two (2-ethyl hexyl) ester, 0.5 part of repefral, 4 parts of polytetrafluorethylepowder powders, 2 parts of polyethylene glycol succinate fibers, 1 part of Tween-60,1 part of polyethenoxy ether sodium sulfate successively carries out mixing, and material is evenly mixing;
(5), by mixing material out, after slaking 12h, join to filter in pre-extruded and extrude, filter impurity in removing material;
(6) extrusion molding: by filtering the material after pre-extruded, by mold integral extrusion molding, and carry out drying process;
(7) peroxy acid polystyrene is prepared: take 12.3g polystyrene, add there-necked flask, drip 1 concentrated sulfuric acid, then measure 10ml hydrogen peroxide, in 20min, add there-necked flask, at 40 DEG C, react 6h, stop reaction, stratification, and be separated subnatant with separatory funnel, be peroxy acid polystyrene.
(8) product in (6) is immersed in 12 parts of peroxy acid polystyrene, after soaking 6h under normal temperature, carry out drying process;
(9) according to the length of regulation, above-mentioned finished product is cut, and carries out front end hardened artiwear process;
(10) packaging product.
embodiment 2
The invention provides a kind of denitrating catalyst peculiar to vessel and preparation method thereof, obtained by the component of following weight portion:
Nano titanium oxide 28 parts;
20 parts, diatomite;
Ceria 15 parts;
Lanthana 10 parts;
Manganese dioxide 7 parts;
White carbon 6 parts;
Talcum powder 6 parts;
Bentonite 5 parts;
Dolomite 3 parts;
A-cyanoacrylate 3 parts;
Phthalic acid two (2-ethyl hexyl) ester 2 parts;
Repefral 1 part;
Polytetrafluorethylepowder powder 5 parts;
Polyethylene glycol succinate fiber 4 parts.
Tween-60 2 parts;
Polyethenoxy ether sodium sulfate 2 parts;
Peroxy acid polystyrene 14 parts.
The preparation technology of a kind of denitrating catalyst peculiar to vessel of the present invention is as follows:
(1) get 28 parts of nano titanium oxides and 20 parts of diatomite, at 70 DEG C of vacuum oven 6h, be cooled to room temperature;
(2) take 15 parts of cerous nitrates, 25 parts of lanthanum nitrates and 15 parts of manganese nitrates, add mixing kettle, 20.2L water is added mixing kettle gradually, and open stirring, after stirring 1.5h with the speed of 150r/min, add nano titanium oxide and HTS that in (1), pretreatment is good, continue to stir 2.5h;
(3) by the said goods, put into Muffle furnace, at 500 DEG C, calcine 5h, obtain corresponding oxide active center: ceria, lanthana and manganese dioxide;
(4) in said components, adding 6 parts of white carbons, 6 parts of talcum powder, 5 parts of bentonites, 3 parts of dolomites, 3 parts of a-cyanoacrylates, 2 parts of phthalic acid two (2-ethyl hexyl) esters, 1 part of repefral, 5 parts of polytetrafluorethylepowder powders, 4 parts of polyethylene glycol succinate fibers, 2 parts of Tween-60s, 2 parts of polyethenoxy ether sodium sulfates successively carries out mixing, and material is evenly mixing;
(5), by mixing material out, after slaking 16h, join to filter in pre-extruded and extrude, filter impurity in removing material;
(6) extrusion molding: by filtering the material after pre-extruded, by mold integral extrusion molding, and carry out drying process;
(7) peroxy acid polystyrene is prepared: take 19.9g polystyrene, add there-necked flask, drip 1 concentrated sulfuric acid, then measure 12ml hydrogen peroxide, in 25min, add there-necked flask, at 50 DEG C, react 4h, stop reaction, stratification, and be separated subnatant with separatory funnel, be peroxy acid polystyrene.
(8) product in (6) is immersed in 14 parts of peroxy acid polystyrene, after soaking 8h under normal temperature, carry out drying process;
(9) according to the length of regulation, above-mentioned finished product is cut, and carries out front end hardened artiwear process;
(10) packaging product.
embodiment 3
The invention provides a kind of denitrating catalyst peculiar to vessel and preparation method thereof, obtained by the component of following weight portion:
Nano titanium oxide 30 parts;
25 parts, diatomite;
Ceria 20 parts;
Lanthana 12 parts;
Manganese dioxide 13 parts;
White carbon 8 parts;
Talcum powder 7 parts;
Bentonite 7 parts;
Dolomite 4 parts;
A-cyanoacrylate 5 parts;
Phthalic acid two (2-ethyl hexyl) ester 2 parts;
Repefral 1 part;
Polytetrafluorethylepowder powder 8 parts;
Polyethylene glycol succinate fiber 6 parts;
Tween-60 3 parts;
Polyethenoxy ether sodium sulfate 5 parts;
Peroxy acid polystyrene 20 parts.
The preparation technology of a kind of denitrating catalyst peculiar to vessel of the present invention is as follows:
(1) get 30 parts of nano titanium oxides and 25 parts of diatomite, at 80 DEG C of vacuum oven 5h, be cooled to room temperature;
(2) take 26 parts of cerous nitrates, 30 parts of lanthanum nitrates and 18 parts of manganese nitrates, add mixing kettle, 26.2L water is added mixing kettle gradually, and open stirring, after stirring 2h with the speed of 200r/min, add nano titanium oxide and HTS that in (1), pretreatment is good, continue to stir 3h;
(3) by the said goods, put into Muffle furnace, at 600 DEG C, calcine 4h, obtain corresponding oxide active center: ceria, lanthana and manganese dioxide;
(4) in said components, adding 8 parts of white carbons, 7 parts of talcum powder, 7 parts of bentonites, 4 parts of dolomites, 5 parts of a-cyanoacrylates, 2 parts of phthalic acid two (2-ethyl hexyl) esters, 1 part of repefral, 8 parts of polytetrafluorethylepowder powders, 6 parts of polyethylene glycol succinate fibers, 3 parts of Tween-60s, 5 parts of polyethenoxy ether sodium sulfates successively carries out mixing, and material is evenly mixing;
(5), by mixing material out, after slaking 24h, join to filter in pre-extruded and extrude, filter impurity in removing material;
(6) extrusion molding: by filtering the material after pre-extruded, by mold integral extrusion molding, and carry out drying process;
(7) peroxy acid polystyrene is prepared: take 22.9g polystyrene, add there-necked flask, drip 2 concentrated sulfuric acids, then measure 15ml hydrogen peroxide, in 30min, add there-necked flask, at 60 DEG C, react 3h, stop reaction, stratification, and be separated subnatant with separatory funnel, be peroxy acid polystyrene.
(8) product in (6) is immersed in 20 parts of peroxy acid polystyrene, after soaking 12h under normal temperature, carry out drying process;
(9) according to the length of regulation, above-mentioned finished product is cut, and carries out front end hardened artiwear process;
(10) packaging product.
Above embodiment 1-3 and traditional SCR catalyst comparative example are carried out active evaluation test.Experimental condition is as follows:
Gas volume forms: nitric oxide: 500ppm, ammonia: 500ppm, carbon dioxide: 5%, steam: 4.5%,
Oxygen: 14%, nitrogen: Balance Air; Air speed: 40000h
-1.
Activity evaluation is as table 1:
As shown in Table 1, the made denitrating catalyst of the present invention has good NO
xconversion temperature, being suitable for current tail gas clean-up peculiar to vessel needs.Compare ratio, in embodiment 1-3, catalyst all has NO
xlower initiation temperature and larger conversion temperature window.Illustrate that the present invention's denitrating catalyst peculiar to vessel has better catalytic performance than traditional catalyst.
Above embodiment 1-3 and traditional SCR catalyst comparative example are carried out high temperature ageing evaluation test.Result is as table 2:
Table 2 is known, the present invention's denitrating catalyst peculiar to vessel according to different aging condition carry out aging after, hydraulic performance decline and not obvious, thus, catalyst of the present invention has good water resistant heat aging performance.
Claims (8)
1. a denitrating catalyst peculiar to vessel, is characterized in that: obtained by following raw material, and described number is weight portion:
Nano titanium oxide 25-30 part;
Diatomite 18-25 part;
Ceria 10-20 part;
Lanthana 8-12 part;
Manganese dioxide 6-13 part;
Lubricant 10-15 part;
Binding agent 6-16 part;
Plasticiser 1.5-3 part;
Anti-wear agent 6-14 part;
Surfactant 2-8 part;
Peroxy acid polystyrene 12-20 part.
2. a kind of denitrating catalyst peculiar to vessel as claimed in claim 1, is characterized in that: wherein said lubricant is made up of the component of following weight portion:
White carbon 5-8 part;
Talcum powder 5-7 part.
3. a kind of denitrating catalyst peculiar to vessel as claimed in claim 1, is characterized in that: wherein said binding agent is made up of the component of following weight portion:
Bentonite 2-7 part;
Dolomite 2-4 part;
A-cyanoacrylate 2-5 part.
4. a kind of denitrating catalyst peculiar to vessel as claimed in claim 1, is characterized in that: wherein said plasticiser is made up of the component of following weight portion:
Phthalic acid two (2-ethyl hexyl) ester 1-2 part;
Repefral 0.5-1 part.
5. a kind of denitrating catalyst peculiar to vessel as claimed in claim 1, is characterized in that: wherein said anti-wear agent is made up of the component of following weight portion:
Polytetrafluorethylepowder powder 4-8 part;
Polyethylene glycol succinate fiber 2-6 part.
6. a kind of denitrating catalyst peculiar to vessel as claimed in claim 1, is characterized in that: wherein said surfactant is made up of the component of following weight portion:
Tween-60 1-3 part;
Polyethenoxy ether sodium sulfate 1-5 part.
7. the preparation method of a kind of denitrating catalyst peculiar to vessel as claimed in claim 1, is characterized in that:
1) get 25-30 part nano titanium oxide and 18-25 part diatomite, at 60-80 DEG C of vacuum oven 5-8h, be cooled to room temperature;
2) 13-26 part cerous nitrate, 22-30 part lanthanum nitrate and 13-18 part manganese nitrate is taken, add mixing kettle, 15.6-26.2L water is added mixing kettle gradually, and open stirring, after stirring 1-2h with the speed of 100-200r/min, add nano titanium oxide and HTS that in step 1), pretreatment is good, continue to stir 2-3h;
3) by the said goods, put into Muffle furnace, at 400-600 DEG C, calcine 4-6h, obtain corresponding oxide active center: ceria, lanthana and manganese dioxide;
4) in said components, interpolation 5-8 part white carbon, 5-7 part talcum powder, 2-7 part bentonite, 2-4 part dolomite, 2-5 part a-cyanoacrylate, 1-2 part phthalic acid two (2-ethyl hexyl) ester, 0.5-1 part repefral, 4-8 part polytetrafluorethylepowder powder, 2-6 part polyethylene glycol succinate fiber, 1-3 part Tween-60,1-5 part polyethenoxy ether sodium sulfate carry out mixing successively, and material is evenly mixing;
5), by mixing material out, after slaking 12-24h, join to filter in pre-extruded and extrude, filter impurity in removing material;
6) by filtering the material after pre-extruded, by mold integral extrusion molding, and drying process is carried out;
7) the said goods is immersed in 12-20 part high molecular polymerization additive peroxy acid polystyrene, after soaking 6-12h under normal temperature, carry out drying process;
8) according to the length of regulation, above-mentioned finished product is cut, and carries out front end hardened artiwear process.
8. the preparation method of a kind of denitrating catalyst peculiar to vessel as claimed in claim 7, it is characterized in that: the preparation method of the high molecular polymerization additive peroxy acid polystyrene described in step 7) is as follows: take 12.3-22.9g polystyrene, add there-necked flask, drip 1-2 and drip the concentrated sulfuric acid, then measure 10-15ml hydrogen peroxide, in 20-30min, add there-necked flask, 3-6h is reacted at 40-60 DEG C, stop reaction, stratification, be separated subnatant and obtain described peroxy acid polystyrene.
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| CN105521777A (en) * | 2015-12-31 | 2016-04-27 | 安徽省元琛环保科技有限公司 | A preparing method of a catalyst for low-temperature denitrification |
| CN105728044A (en) * | 2016-01-27 | 2016-07-06 | 中国石油大学(北京) | Selective polymer catalytic denitrifying agent as well as application and device thereof |
| CN106622214A (en) * | 2016-12-16 | 2017-05-10 | 内蒙古华元科技有限公司 | Flue gas denitrification titanium-based catalyst for ceramic and preparation method of catalyst |
| CN106732699A (en) * | 2016-12-26 | 2017-05-31 | 内蒙古华元科技有限公司 | One kind is for coal steam-electric plant smoke denitration wide temperature range type Ti-base catalyst and preparation method thereof |
| CN106890634A (en) * | 2017-02-15 | 2017-06-27 | 福建帕特纳环境产品有限公司 | A kind of SCR denitration of boat diesel engine vent gas treatment |
| CN109364981A (en) * | 2018-08-09 | 2019-02-22 | 江苏龙净科杰环保技术有限公司 | Arsenical fume no vanadium denitration catalyst and its preparation process |
| CN111545040A (en) * | 2020-04-10 | 2020-08-18 | 佛山华清智业环保科技有限公司 | Composite denitration agent and preparation method thereof |
| CN115532277A (en) * | 2022-06-15 | 2022-12-30 | 安徽元琛环保科技股份有限公司 | Preparation method of high-performance catalytic combustion catalyst and prepared catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521777A (en) * | 2015-12-31 | 2016-04-27 | 安徽省元琛环保科技有限公司 | A preparing method of a catalyst for low-temperature denitrification |
| CN105728044A (en) * | 2016-01-27 | 2016-07-06 | 中国石油大学(北京) | Selective polymer catalytic denitrifying agent as well as application and device thereof |
| CN106622214A (en) * | 2016-12-16 | 2017-05-10 | 内蒙古华元科技有限公司 | Flue gas denitrification titanium-based catalyst for ceramic and preparation method of catalyst |
| CN106732699A (en) * | 2016-12-26 | 2017-05-31 | 内蒙古华元科技有限公司 | One kind is for coal steam-electric plant smoke denitration wide temperature range type Ti-base catalyst and preparation method thereof |
| CN106890634A (en) * | 2017-02-15 | 2017-06-27 | 福建帕特纳环境产品有限公司 | A kind of SCR denitration of boat diesel engine vent gas treatment |
| CN109364981A (en) * | 2018-08-09 | 2019-02-22 | 江苏龙净科杰环保技术有限公司 | Arsenical fume no vanadium denitration catalyst and its preparation process |
| CN111545040A (en) * | 2020-04-10 | 2020-08-18 | 佛山华清智业环保科技有限公司 | Composite denitration agent and preparation method thereof |
| CN111545040B (en) * | 2020-04-10 | 2022-09-23 | 佛山华清智业环保科技有限公司 | Composite denitration agent and preparation method thereof |
| CN115532277A (en) * | 2022-06-15 | 2022-12-30 | 安徽元琛环保科技股份有限公司 | Preparation method of high-performance catalytic combustion catalyst and prepared catalyst |
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