CN108619907A - A kind of urea for vehicle reducing agent solution - Google Patents
A kind of urea for vehicle reducing agent solution Download PDFInfo
- Publication number
- CN108619907A CN108619907A CN201810409205.3A CN201810409205A CN108619907A CN 108619907 A CN108619907 A CN 108619907A CN 201810409205 A CN201810409205 A CN 201810409205A CN 108619907 A CN108619907 A CN 108619907A
- Authority
- CN
- China
- Prior art keywords
- urea
- reducing agent
- solution
- solidification point
- pure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000004202 carbamide Substances 0.000 title claims abstract description 46
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 14
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004471 Glycine Substances 0.000 claims abstract description 16
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 16
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 13
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 4
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical group NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 26
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 125000002252 acyl group Chemical group 0.000 claims 1
- 150000001412 amines Chemical class 0.000 claims 1
- 235000013877 carbamide Nutrition 0.000 abstract description 41
- 238000007711 solidification Methods 0.000 abstract description 33
- 230000008023 solidification Effects 0.000 abstract description 33
- 239000012498 ultrapure water Substances 0.000 abstract description 10
- 150000001408 amides Chemical class 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract description 6
- 229910021642 ultra pure water Inorganic materials 0.000 abstract description 4
- PRKQVKDSMLBJBJ-UHFFFAOYSA-N ammonium carbonate Chemical class N.N.OC(O)=O PRKQVKDSMLBJBJ-UHFFFAOYSA-N 0.000 abstract 1
- 235000011162 ammonium carbonates Nutrition 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 26
- 238000004458 analytical method Methods 0.000 description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- 239000007864 aqueous solution Substances 0.000 description 11
- 235000019441 ethanol Nutrition 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitrogen oxide Substances O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 210000002700 urine Anatomy 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005979 thermal decomposition reaction Methods 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- VZTDIZULWFCMLS-UHFFFAOYSA-N ammonium formate Chemical class [NH4+].[O-]C=O VZTDIZULWFCMLS-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- -1 small molecule amino acid Chemical class 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- 235000012501 ammonium carbonate Nutrition 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
Abstract
The invention discloses a kind of urea for vehicle reducing agent solutions, belong to exhaust-gas treatment field, and carbamide reducing agent solution is formulated by the raw material of following mass fraction:20 28% urea, 10% 25%C3Small molecule amide below, 1% 5% glycine, 0% 10% ammonium hydrogen carbonate or ammonium carbonates and 35% 68% ultra-pure water for Total mass balance score.The present invention provides a kind of urea for vehicle solution of solidification point between 24 DEG C~28 DEG C.
Description
Technical field
The invention belongs to exhaust-gas treatment fields, are related to a kind of formula of diesel engine vent gas processing reducing agent.
Background technology
Instantly, environmental pollution is a great social concern, and is become worse, and people are enjoying scientific and technological progress
While the welfare brought, also have to bear to industrialize the destruction to environment.It most lives and ceases with people in all kinds of environmental pollutions
It is exactly atmosphere pollution to cease relevant, and in many reasons for causing atmosphere pollution, the pollution of various types of vehicles tail gas occupies
A no small part.The oversize vehicles such as load truck, big microbus, engine are based on diesel powered.Diesel engine phase
Than gasoline engine, there are many advantages such as efficient, powerful, but more undeniable is dirt caused by diesel combustion
Dye is even more serious than gasoline engine, and the emission of diesel engine is it is crucial that NOxAnd PM, processing particle is mainly by particle trapper
(DPF), NOxThen (SCR) is restored mainly by catalysis.SCR technology route is to rely on reducing agent to NO during exhaust aftertreatmentx
Selective catalytic reduction is carried out, NO is reducedxDischarge, to meet limitation of state's V emission regulations for NOx.
Use Urea treatment NOxMethod, be referred to as USCR (Urea Seletive Catalytic Reduction),
It is characterized in that having extremely strong catalytic selectivity, reducing agent being capable of efficient, single-minded and NOxIt is reacted, relative inexpensiveness,
Widely mainstream diesel vehicle manufacturer uses.Usually, more convenient using aqueous solution of urea as exhaust aftertreatment reducing agent, urine
Plain aqueous solution can generate NH at 300 DEG C or more with reaction of nitrogen oxides3, utilize the NH of generation3With reaction of nitrogen oxides, nothing is generated
It is discharged into air after evil gas.
Currently, conventional urea for vehicle solution refers to executing national standard《GB 29518-2013 diesel engine nitrogen oxidations
Object reducing agent aqueous solution of urea (AUS 32)》A kind of certain concentration urea liquid, urea quality score be 31.8%~
33.2%, solvent is ultra-pure water, and solidification point is about at -11 DEG C or so, it means that using SCR technology vehicle winter northwards not
The Shanhai Pass can be run.Traditional solutions are to add anti-icing fluid circulating-heating or electrically heated system in the automobile-used urea system of tradition
System and heat-insulation system increase a series of add-on parts such as heating tube loop, temperature sensor, insulating layer, and not only per car increases
The costs of thousands of members, undoubtedly also increases the complexity of system, improves failure rate indirectly.In addition, being needed when winter starts
For a period of time, heated engine coolant liquid is to melt the urea liquid of icing for engine idling operation.According to BMW public affairs in 2014
A test data of department shows that when liquor box temperature is -12 DEG C, certain type vehicle temporary parking is again started up needs after 30 minutes
Preheating 25 minutes, discharged nitrous oxides caused by this section of heating time are higher by two orders of magnitude than nominal situation, this undoubtedly with SCR
The original intention that system reduces nitrogen oxide emission runs in the opposite direction.Therefore, exploitation can keep the urea for vehicle of liquid phase molten at low temperature
Liquid is imperative.
Patent CN102213126A has exposed heat in practical applications using additives such as low mass molecule alcohol, ammonium formates
Decomposition product corrodes the problem of exhaust pipe.
Invention content
The purpose of the present invention is overcoming the disadvantage that automobile-used urea liquid solidification point is high under the prior art, a kind of solidification is provided
Urea for vehicle solution of the point between -24 DEG C~-28 DEG C.
To achieve the above object, the present invention adopts the following technical scheme that, carbamide reducing agent solution is by following mass fraction
Raw material is formulated:20-28% urea, 10%-25%C3Small molecule amide below, 1%-5% glycine, 0%-10% carbon
The ultra-pure water of sour hydrogen ammonium or ammonium carbonate and the 35%-68% for Total mass balance score.
Preferably, a kind of carbamide reducing agent solution formula, is made of following raw material by weight percentage:25% urea,
20% formamide, 3% glycine, 7% ammonium hydrogen carbonate, 45% ultra-pure water.
Low form urea for vehicle solution of the present invention is lower compared with the solidification point of the prior art, can be in diesel oil cold filter temperature
It is employed without heating under degree, is suitable for the use in winter in China's cold district, there is very high practical value.At the same time,
This solution items additive is the organic matter containing negative oxidation state nitrogen, high-temperature decomposition product cleanliness without any pollution, and energy and tail gas
In NOxComproportionation reaction occurs, improves the performance of urea for vehicle solution indirectly.
The core component of this solution formula is a series of small molecule amino acid using glycine as representative.Amino acid conduct
A kind of amphiprotic substance, it is mixed with that can significantly reduce in the molten state with the compound with hydrogen bond donor property such as urea, amide
Close the eutectic property of object solidification point.We have found under study for action, under the ionization system of aqueous solution, using glycine as representative
A series of small molecule amino acid equally have such property.Amino acid is added aqueous solution and can not be generated significantly to solution solidification point
It influences, but solution solidification point can be made a jump occur with other salt collective effects after glycine addition aqueous solution of urea
Reduction, this point embodied in control experiment 1 below.
Some manufacturers reduce solution solidification point, effect using methanol, ethyl alcohol or other cheap small molecular alcohols on Vehicles Collected from Market
Fruit is notable and cheap, but such method has very big hidden danger.Because under the temperature environment of SCR system work, in solution
Alcohol component can be partially converted into corresponding acid, corrode discharge duct and be allowed to leak, seriously compromise the profit of user
Benefit.Similarly, currently there are some patent families, using the technology path of the sour ammonium material of addition reduces solidification point, this technology
Route is no doubt feasible on reducing solution solidification point mechanism, but the temperature environment that such additives can equally work in SCR system
Under be converted into the acid of the effect that is corrosive to discharge duct, be allowed to put into actual application.This patent is taken
Amide substance of the thermal decomposition product without acid.
Advantageous effect:
Patent family CN102213126A has been exposed through in practical applications using additives such as low mass molecule alcohol, ammonium formates
The problem of going out thermal decomposition product corrosion exhaust pipe.And asking there is no corresponding small molecule acid corrosion exhaust pipe after present invention thermal decomposition
Topic.
Compared with patent family CN104607041A reduces the technology path of solution solidification point using propylene glycol and ammonium formate,
There is no the hidden danger of formic acid, malonic acid corrosion exhaust pipe after present invention thermal decomposition.The additive price that the present invention uses simultaneously
It is evident as expensive propylene glycol, there are economic advantages.
CN105536865A, CN105498537A, CN107138044A, the CN107178408A delivered with military Grain Full et al.
A series of similar patents are compared using small molecular alcohol with the technology path of small molecule liquid amide (i.e. formamide), and this patent coagulates
Solid point does not use the solidification point of the formula of small molecular alcohol substance lower compared with wherein, and it uses the formula of small molecular alcohol substance
Not the problem of not being avoided that above-mentioned comparison acid corrosion exhaust pipe equally.The research of military Grain Full et al. points out simultaneously, bicarbonate
An Zu branches influence the long-time stability of solution.In the actual production process, the ammonium hydrogen carbonate, ammonium carbonate of high level influence
Usage amount can be replaced by amide or slightly be reduced to shelf life of products.Even if following Examples 6 it has already been indicated that do not make completely
With ammonium hydrogen carbonate, the present invention still can guarantee -24 DEG C of solidification point, have preferable use value.
Specific implementation mode
Experiment uses low-temperature cooling fluid circulating pump equipment, and low temperature environment is simulated in a manner of ethanol bath, copper-based using being equipped with
The temperature changing process of solution solidification to be measured, passes through and draws cooling curve in the conductance temperature measuring set reading test tube of temperature probe
The practical solidification point of each formula is obtained with the method that test of many times is averaged.
Embodiment 1
The pure urea 25% of analysis, analytically pure formamide 20%, analytically pure glycine 3%, analysis are taken by mass fraction
Pure ammonium hydrogen carbonate 7%, high purity water 45%, (25 DEG C) stirrings of room temperature to it is complete it is molten after, the as automobile-used urine of low form of the invention
Plain solution, solidification point are -26 DEG C.
Embodiment 2
The pure urea 20% of analysis, analytically pure formamide 20%, analytically pure glycine 3%, analysis are taken by mass fraction
Pure ammonium hydrogen carbonate 7%, high purity water 50%, (25 DEG C) stirrings of room temperature to it is complete it is molten after, the as automobile-used urine of low form of the invention
Plain solution, solidification point are -25 DEG C.
Embodiment 3
The pure urea 25% of analysis, analytically pure formamide 15%, analytically pure glycine 3%, analysis are taken by mass fraction
Pure ammonium hydrogen carbonate 7%, high purity water 50%, (25 DEG C) stirrings of room temperature to it is complete it is molten after, the as automobile-used urine of low form of the invention
Plain solution, solidification point are -25 DEG C.
Embodiment 4
The pure urea 25% of analysis, analytically pure formamide 20%, analytically pure glycine 3%, analysis are taken by mass fraction
Pure ammonium hydrogen carbonate 7%, high purity water 45%, (25 DEG C) stirrings of room temperature to it is complete it is molten after, the as automobile-used urine of low form of the invention
Plain solution, solidification point are -26 DEG C.
Embodiment 5
The pure urea 25% of analysis, analytically pure acetamide 20%, analytically pure glycine 3%, analysis are taken by mass fraction
Pure ammonium hydrogen carbonate 7%, high purity water 45%, (25 DEG C) stirrings of room temperature to it is complete it is molten after, the as automobile-used urine of low form of the invention
Plain solution, solidification point are -26 DEG C.
Embodiment 6
The pure urea 25% of analysis, analytically pure formamide 22%, analytically pure glycine 3%, high-purity is taken by mass fraction
Water 50%, the stirring of (25 DEG C) of room temperature to it is complete it is molten after, as low form urea for vehicle solution of the invention, solidification point are -24
℃。
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification should all belong to the covering scope of the present invention.
Control experiment 1
This group of experimental result is intended to reduce the active effects of solution solidification point when comparative illustration glycine collective effect.
The pure urea 30% of analysis, analytically pure formamide 15%, analytically pure ammonium hydrogen carbonate 5%, height are taken by mass fraction
Pure water 50%, the stirring of (25 DEG C) of room temperature to it is complete it is molten after, solidification point is -18 DEG C.
The pure urea 30% of analysis is taken by mass fraction, analytically pure formamide 15%, analytically pure ammonium hydrogen carbonate 5%, is divided
Analyse pure glycine 5%, high purity water 45%, the stirring of (25 DEG C) of room temperature to it is complete it is molten after, solidification point is -23 DEG C.
The pure urea 30% of analysis, analytically pure formamide 20%, analytically pure ammonium hydrogen carbonate 5%, height are taken by mass fraction
Pure water 45%, the stirring of (25 DEG C) of room temperature to it is complete it is molten after, solidification point is -20 DEG C.
In contrast, it can clearly judge that a certain amount of glycine and formamide, urea collective effect are significantly more
Solution solidification point is reduced, the excitation that solidification point of the present invention reduces not is simply to rely on the superposition of salts substances usage amount.
Control experiment 2
This group of experimental result is intended to the rule of variation when several additive components of comparative illustration are individually arranged in pairs or groups with aqueous solution of urea
Rule, their interactively is illustrated by solidification point variation tendency.
Ammonium acetate-aqueous solution of urea solidification point under 1 different quality containing of table
Formamide-aqueous solution of urea solidification point under 2 different quality containing of table
Acetamide-aqueous solution of urea solidification point under 3 different quality containing of table
Glycine-aqueous solution of urea solidification point under 4 different quality containing of table
Claims (3)
1. a kind of urea for vehicle reducing agent solution, it is characterised in that:It is formulated by weight percentage by following raw material:
2. urea for vehicle reducing agent solution according to claim 1, it is characterised in that:The C3Small molecule acyl below
Amine is formamide, acetamide.
3. urea for vehicle reducing agent solution according to claim 1, it is characterised in that:By weight percentage by following original
Material is formulated:25% urea, 20% formamide, 3% glycine, 7% ammonium hydrogen carbonate, 45% water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810409205.3A CN108619907A (en) | 2018-04-28 | 2018-04-28 | A kind of urea for vehicle reducing agent solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810409205.3A CN108619907A (en) | 2018-04-28 | 2018-04-28 | A kind of urea for vehicle reducing agent solution |
Publications (1)
Publication Number | Publication Date |
---|---|
CN108619907A true CN108619907A (en) | 2018-10-09 |
Family
ID=63695167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810409205.3A Pending CN108619907A (en) | 2018-04-28 | 2018-04-28 | A kind of urea for vehicle reducing agent solution |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN108619907A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111482087A (en) * | 2020-05-21 | 2020-08-04 | 重庆化工职业学院 | Low-temperature marine urea aqueous solution and preparation method thereof |
CN112554999A (en) * | 2020-12-23 | 2021-03-26 | 重庆化工职业学院 | Anti-crystallization type automobile urea aqueous solution and preparation method thereof |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1030193A (en) * | 1987-05-14 | 1989-01-11 | 燃料技术有限公司 | Reduce nitrogen oxide and make other pollutants produce the method that reduces to minimum |
US4803059A (en) * | 1987-04-15 | 1989-02-07 | Fuel Tech, Inc. | Process for the reduction of nitrogen oxides in an effluent using a hydroxy amino hydrocarbon |
CN101636219A (en) * | 2007-02-23 | 2010-01-27 | 道达尔炼油与销售部 | Aqueous solution for the treatment of diesel engine exhaust gases |
CN101961653A (en) * | 2010-09-30 | 2011-02-02 | 浙江工业大学 | Composite oxide catalytic combustion catalyst as well as preparation method and application thereof |
CN102213124A (en) * | 2011-05-24 | 2011-10-12 | 辽宁润迪精细化工有限公司 | Ultralow-temperature urea reducing agent composition |
CN102213126A (en) * | 2011-05-24 | 2011-10-12 | 辽宁润迪精细化工有限公司 | Low-temperature urea reducing agent composition |
CN202212111U (en) * | 2011-09-08 | 2012-05-09 | 湖南安普诺环保科技有限公司 | Denitration system reducing agent urea solution preparing device |
CN104437059A (en) * | 2014-12-10 | 2015-03-25 | 江汉大学 | Flue gas absorbent of desulfurization and denitrification, and desulfurization and denitrification method thereof |
CN104437008A (en) * | 2014-11-28 | 2015-03-25 | 南京工业大学 | Method for preparing bio-methane by purifying biogas |
CN104492379A (en) * | 2014-11-26 | 2015-04-08 | 成都顺发消洗科技有限公司 | Adsorption-reaction type solid formaldehyde elimination agent |
CN104548874A (en) * | 2013-10-17 | 2015-04-29 | 胡亮 | Deacidification process and system for gas mixtures containing acid gases |
CN106861431A (en) * | 2017-04-21 | 2017-06-20 | 广东龙鼎环境科技工程有限公司 | Quadruple effect denitrfying agent composition and its method of denitration |
-
2018
- 2018-04-28 CN CN201810409205.3A patent/CN108619907A/en active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4803059A (en) * | 1987-04-15 | 1989-02-07 | Fuel Tech, Inc. | Process for the reduction of nitrogen oxides in an effluent using a hydroxy amino hydrocarbon |
CN1030193A (en) * | 1987-05-14 | 1989-01-11 | 燃料技术有限公司 | Reduce nitrogen oxide and make other pollutants produce the method that reduces to minimum |
CN101636219A (en) * | 2007-02-23 | 2010-01-27 | 道达尔炼油与销售部 | Aqueous solution for the treatment of diesel engine exhaust gases |
CN101961653A (en) * | 2010-09-30 | 2011-02-02 | 浙江工业大学 | Composite oxide catalytic combustion catalyst as well as preparation method and application thereof |
CN102213124A (en) * | 2011-05-24 | 2011-10-12 | 辽宁润迪精细化工有限公司 | Ultralow-temperature urea reducing agent composition |
CN102213126A (en) * | 2011-05-24 | 2011-10-12 | 辽宁润迪精细化工有限公司 | Low-temperature urea reducing agent composition |
CN202212111U (en) * | 2011-09-08 | 2012-05-09 | 湖南安普诺环保科技有限公司 | Denitration system reducing agent urea solution preparing device |
CN104548874A (en) * | 2013-10-17 | 2015-04-29 | 胡亮 | Deacidification process and system for gas mixtures containing acid gases |
CN104492379A (en) * | 2014-11-26 | 2015-04-08 | 成都顺发消洗科技有限公司 | Adsorption-reaction type solid formaldehyde elimination agent |
CN104437008A (en) * | 2014-11-28 | 2015-03-25 | 南京工业大学 | Method for preparing bio-methane by purifying biogas |
CN104437059A (en) * | 2014-12-10 | 2015-03-25 | 江汉大学 | Flue gas absorbent of desulfurization and denitrification, and desulfurization and denitrification method thereof |
CN106861431A (en) * | 2017-04-21 | 2017-06-20 | 广东龙鼎环境科技工程有限公司 | Quadruple effect denitrfying agent composition and its method of denitration |
Non-Patent Citations (1)
Title |
---|
谢红银等: "尿素溶液湿法烟气脱硝添加剂的影响特性研究", 《中国电机工程学报》 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111482087A (en) * | 2020-05-21 | 2020-08-04 | 重庆化工职业学院 | Low-temperature marine urea aqueous solution and preparation method thereof |
CN112554999A (en) * | 2020-12-23 | 2021-03-26 | 重庆化工职业学院 | Anti-crystallization type automobile urea aqueous solution and preparation method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107138044B (en) | Diesel vehicle urea solution with low-temperature performance and preparation method thereof | |
CN107261844B (en) | Production process of vehicle urea containing nano-scale catalyst | |
CN102213124B (en) | Ultralow-temperature urea reducing agent composition | |
CN102580531B (en) | Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof | |
CN107233912B (en) | Two-stage catalyst for diesel vehicle tail gas treatment and preparation method thereof | |
BR112013021254A2 (en) | exhaust system for an internal combustion engine of a poorly burning vehicle, and an internal combustion engine of a poorly burning | |
CN105498537A (en) | Low-temperature diesel exhaust reducing agent and preparation method thereof | |
CN104265422A (en) | Low-temperature condition release ammonia reducing agent composition and preparation method thereof | |
CN108619907A (en) | A kind of urea for vehicle reducing agent solution | |
CN102213125A (en) | Urea reducing agent composition with improved low-temperature performance | |
CN102213126B (en) | Low-temperature urea reducing agent composition | |
CN102247886B (en) | Manganese-zirconium dual metal modified selective catalytic reduction catalyst for molecular sieve type diesel engine | |
CN101560422B (en) | AdBlue composition as reducing agent for diesel engine with SCR technology | |
CN105536865A (en) | Diesel oil tail gas reducing agent for improving low temperature performances, and preparation method thereof | |
CN113441131A (en) | CO-CH-SCR (Selective catalytic reduction) cooperative denitration catalyst and preparation method thereof | |
CN105964143A (en) | Diesel engine tail gas treatment agent | |
US9181832B2 (en) | Exhaust aftertreatment system where an activator material is added to the reductant fed to the catalytic converter | |
CN107051204A (en) | A kind of preparation technology of urea for vehicle solution | |
CN107587922A (en) | A kind of ultralow temperature urea for vehicle solution and preparation method thereof | |
CN107178408A (en) | A kind of ultralow temperature diesel vehicle urea liquid and preparation method thereof | |
CN111484881B (en) | Energy-saving emission-reducing agent in compression-ignition engine | |
CN111471497B (en) | Clean diesel oil for compression ignition engine | |
CN110773159B (en) | Preparation process of Pt/Pd/Rh oxidation catalyst and catalyst prepared by same | |
KR101589078B1 (en) | Manufacturing method of Additive to prevent freezing of Urea and Additive to prevent freezing of Urea manufactured by the same | |
CN114247468B (en) | Composite denitration catalyst, preparation method and application thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181009 |