CN104307366A - Diesel vehicle tail gas catalyst reduction composition - Google Patents
Diesel vehicle tail gas catalyst reduction composition Download PDFInfo
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- CN104307366A CN104307366A CN201410563607.0A CN201410563607A CN104307366A CN 104307366 A CN104307366 A CN 104307366A CN 201410563607 A CN201410563607 A CN 201410563607A CN 104307366 A CN104307366 A CN 104307366A
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Abstract
The invention discloses a tail gas reduction composition for a diesel vehicle, and belongs to the technical field of vehicle environment-friendly and chemical industry. The composition is composed of the following components: 18-33% of adblue, 2-20% of inorganic ammonium salt, 5-30% of methanol, 0-30% of glycol, and the balance of deionized water. The technical scheme adopts the mode of combining the glycol and the methanol to effectively reduce the low temperature performance of the diesel vehicle tail gas reducing agent composition, and comprehensively balance the factors such as phase transformation point and solubility, on the basis of guaranteeing that the nitrogen content meets the normal work of an SCR system, the high-low temperature adaptability of the solution is greatly improved, the normal work demands in most regions can be satisfied, and meanwhile, the content of the urea is improved as soon as possible, the tail gas treatment efficiency of the SCR system is guaranteed, the prepared product is good in low temperature flowing characteristic, low in ice point, and capable of meeting the long-term stable operation under the condition that the operation temperature is -40 to -20 DEG.C.
Description
Technical field
The present invention relates to a kind of to diesel vehicle tail-gas catalyst reducing composition, belong to automobile environment-protection and chemical technology field.
Background technology
Along with the develop rapidly of auto industry, global ecological environment is just undergo serious challenge, to have become international common recognition to the improvement of atmospheric protection and environment.Each developed country of the world carries out more strict exhaust emission standard just energetically.The current control as the China in fast development also pay attention to day by day internal combustion engine tail gas discharge and process, and using the Europe IV standard as recent industrial standard.
Diesel engine is high as one high efficiency combustion power source fuel efficiency, and power performance is good, and durability is strong and be widely used in mobile dynamical system, but because self oxygen-enriched combusting characteristic of diesel engine, traditional catalysis process cannot solve its denitration problem.At present, ripe diesel engine vent gas treating method is as the selective catalysis reaction of reducing agent and SCR with urea liquid.
Due to aqueous solution of urea self, its low temperature freezes and solubility hinders a key factor of SCR application development.
Consider the change of the operating environment of motor vehicles, low temperature resistant SCR system reducing agent can continued operation and without precipitation or phase transformation in the environment below-20 ~-35 DEG C.
According to the physical characteristic of aqueous solution of urea, its content be 32.5% urea liquid freezing point be-11.5 DEG C, the extensive use demand of motor vehicles SCR system can not be met far away.Especially in the winter of northern area, because northern environment temperature is too low in transport and storage process, urea liquid is easily separated out, crystallization, cannot extensively use.The existing research of low-temperature urea reducing agent solution mainly concentrates on the discussion of solution polynary system, especially with alcohol, ether etc. for main formula, though its low-temperature characteristics changes, all not complete consideration of dynamic flow performance, production cost and secondary pollution problems.The urea tail gas catalytic reducer of low temperature has been applied in Chinese patent CN 102580531B " a kind of anti-low temperature exhaust gas catalytic reducer and preparation method thereof " patent of invention, the content of its ammonium carbonate reaches 40% more than, the sal volatile of high-load is relatively unstable, easy decomposition, the content that in formula, urea is minimum only only has about 11%, this strongly limits the utilization effect of this formula in existing system.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and can meet the working at ultra-low temperature condition of-20 DEG C ~-40 DEG C and can solve the exhaust gas from diesel vehicle catalyst reduction composition of secondary pollution problem.
For solving the problem, technical scheme of the present invention is: a kind of exhaust gas from diesel vehicle catalyst reduction composition, and by mass percentage, it consists of:
Described exhaust gas from diesel vehicle catalyst reduction composition, by mass percentage, it preferably consists of:
This antifreezing diesel tail gas catalytic reduction composition is applicable to the area of low temperature-40 DEG C.
Described exhaust gas from diesel vehicle catalyst reduction composition, by mass percentage, it preferably consists of:
This antifreezing diesel tail gas catalytic reduction composition is applicable to the area of low temperature-20 DEG C.
Described inorganic ammonium salt is Ammonium bicarbonate food grade or ammonium carbonate; Be preferably ammonium carbonate.
Technical scheme to balance each other principle according to Multi component system, and the method for application of cold temperature additive adds catalyst to reduce its freezing point in traditional aqueous solution of urea.Can under-20 DEG C ~-40 DEG C conditions continued operation without precipitation phase transformation, to guarantee that SCR system normally works.
Beneficial effect of the present invention: the mode that technical scheme takes ethylene glycol and methanol phase to coordinate effectively reduces the cryogenic property of exhaust gas from diesel vehicle reducing agent composition, and its factor such as transformation temperature and solubility of overall balance, ensureing that nitrogen content meets on the basis that SCR system normally works, substantially increase the high/low temperature adaptability of solution, the normal requirements of one's work of most area can be met, improve the content of urea as much as possible simultaneously, ensure that the vent gas treatment efficiency of SCR system, formulated product cold flow characteristics is good, freezing point is low, meet operating temperature operation steady in a long-term under the condition of-20 DEG C ~-40 DEG C.
Ethylene glycol used in the present invention and methyl alcohol can be effectively miscible with deionized water, good fluidity, and atomization is stable, and on SCR system operation without impact, its fluid viscosity is suitable with standard urea solution, and on SCR shower nozzle without impact, and product after burning is pollution-free.
Detailed description of the invention
Particular content of the present invention is described in detail below in conjunction with specific embodiment.
Raw material of the present invention is all market purchasing, wherein urea for vehicle adopts the special urea of AUS 32, biuret only containing trace, ammonia and water, not containing aldehyde and other material (as anti-caking agent), not sulfur-bearing and sulfide, chloride, nitrate and other compound, meet the requirement of GB 29518-2013 after dissolving, wherein mentioned carbon ammonium is pure for analyzing, and wherein calcium ion content is less than 0.5kg/kg;
Ethylene glycol and methyl alcohol are industrial top grade product, and wherein the tenor such as sodium, Determination is all less than 0.5kg/kg, meet the requirement of GB 29518-2013 after mixing.
By getting final product packing after the metre filter of 0.1 ~ 0.5um after acceptance(check).
This exhaust gas from diesel vehicle reducing agent composition can meet the normal work requirements of SCR after tested.
Embodiment 1
The component proportion following (by quality ratio %) of the present embodiment:
In order to avoid the decomposition of carbon ammonium in obtain solution process in the present embodiment, the step of compositions formulated of the present invention is as follows: the deionized water adding 380kg in the reactor of 2000kg, add urea for vehicle 210kg, stir and add 100kg carbon ammonium immediately after 2 minutes, after stirring and dissolving, slowly add methyl alcohol 60kg, ethylene glycol 250kg, mix, detect qualified after filling by 0.1 ~ 0.5um metre filter.
The present embodiment product can meet the instructions for use of low temperature-40 DEG C, stores more than 2 years without any precipitation and crystallization in room temperature to low temperature-40 DEG C of environment.
Finished product meets the instructions for use of vehicle tail gas carbamide reducing agent through SGS detection trace element detection.
Embodiment 2
The component proportion following (by quality ratio %) of the present embodiment:
In order to avoid the decomposition of carbon ammonium in obtain solution process in the present embodiment, the step of compositions formulated of the present invention is as follows: the deionized water adding 505kg in the reactor of 2000kg, add urea for vehicle 240kg, stir and add 160kg carbon ammonium immediately after 2 minutes, after stirring and dissolving, slowly add methyl alcohol 90kg, ethylene glycol 5kg, mix, detect qualified after filling by 0.1 ~ 0.5um metre filter.
The present embodiment product can meet the instructions for use of low temperature-20 DEG C, and under room temperature to-20 DEG C of low temperature environments, store more than 2 years without separating out and any crystallization, finished product meets the instructions for use of vehicle tail gas reductant through SGS traces component measure.
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Claims (5)
1. an exhaust gas from diesel vehicle catalyst reduction composition, by mass percentage, it consists of:
2. exhaust gas from diesel vehicle catalyst reduction composition according to claim 1, it is characterized in that: by mass percentage, it consists of:
3. exhaust gas from diesel vehicle catalyst reduction composition according to claim 1, it is characterized in that: by mass percentage, it consists of:
4. exhaust gas from diesel vehicle catalyst reduction composition according to claim 1, is characterized in that: described inorganic ammonium salt is Ammonium bicarbonate food grade or ammonium carbonate.
5. exhaust gas from diesel vehicle catalyst reduction composition according to claim 4, is characterized in that: described inorganic ammonium salt is ammonium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410563607.0A CN104307366A (en) | 2014-10-21 | 2014-10-21 | Diesel vehicle tail gas catalyst reduction composition |
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| CN201410563607.0A CN104307366A (en) | 2014-10-21 | 2014-10-21 | Diesel vehicle tail gas catalyst reduction composition |
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| CN104307366A true CN104307366A (en) | 2015-01-28 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106039996A (en) * | 2016-06-28 | 2016-10-26 | 许江煌 | Adblue and preparation method thereof |
| CN106064020A (en) * | 2016-06-28 | 2016-11-02 | 许江煌 | A kind of preparation method of urea for vehicle |
| CN106745060A (en) * | 2016-12-14 | 2017-05-31 | 河南省化工研究所有限责任公司 | A kind of low form urea for vehicle solution and preparation method thereof |
| CN107198943A (en) * | 2017-05-02 | 2017-09-26 | 山西艾珂灵环境科技有限公司 | A kind of tail gas absorption liquid |
| CN108261922A (en) * | 2018-04-09 | 2018-07-10 | 薛向东 | A kind of preparation method of low temperature resistant urea for vehicle solution |
| CN108443000A (en) * | 2018-02-12 | 2018-08-24 | 新疆现代特油科技股份有限公司 | The automobile-used purified treatment liquid of low temperature |
| CN109908755A (en) * | 2019-04-11 | 2019-06-21 | 兰州梓苑环保科技有限公司 | A kind of vent gas treatment liquid and preparation method thereof suitable for -25 DEG C of environment |
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580531A (en) * | 2012-01-12 | 2012-07-18 | 石俊峰 | Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof |
| CN103949154A (en) * | 2014-05-08 | 2014-07-30 | 夏光甫 | Automobile exhaust emission purification treatment fluid |
-
2014
- 2014-10-21 CN CN201410563607.0A patent/CN104307366A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580531A (en) * | 2012-01-12 | 2012-07-18 | 石俊峰 | Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof |
| CN103949154A (en) * | 2014-05-08 | 2014-07-30 | 夏光甫 | Automobile exhaust emission purification treatment fluid |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106039996A (en) * | 2016-06-28 | 2016-10-26 | 许江煌 | Adblue and preparation method thereof |
| CN106064020A (en) * | 2016-06-28 | 2016-11-02 | 许江煌 | A kind of preparation method of urea for vehicle |
| CN106064020B (en) * | 2016-06-28 | 2018-10-23 | 许江煌 | A kind of preparation method of urea for vehicle |
| CN106745060A (en) * | 2016-12-14 | 2017-05-31 | 河南省化工研究所有限责任公司 | A kind of low form urea for vehicle solution and preparation method thereof |
| CN107198943A (en) * | 2017-05-02 | 2017-09-26 | 山西艾珂灵环境科技有限公司 | A kind of tail gas absorption liquid |
| CN108443000A (en) * | 2018-02-12 | 2018-08-24 | 新疆现代特油科技股份有限公司 | The automobile-used purified treatment liquid of low temperature |
| CN108261922A (en) * | 2018-04-09 | 2018-07-10 | 薛向东 | A kind of preparation method of low temperature resistant urea for vehicle solution |
| CN109908755A (en) * | 2019-04-11 | 2019-06-21 | 兰州梓苑环保科技有限公司 | A kind of vent gas treatment liquid and preparation method thereof suitable for -25 DEG C of environment |
| 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 |
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Application publication date: 20150128 |