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Diesel vehicle tail gas catalyst reduction composition

A technology for catalysts and diesel vehicles, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve problems such as secondary pollution, achieve stable atomization, improve high and low temperature adaptability, and have good flow characteristics

Inactive Publication Date: 2015-01-28
张家港迪克汽车化学品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a diesel vehicle exhaust catalyst reduction composition that can meet the ultra-low temperature working conditions of -20°C to -40°C and can solve the problem of secondary pollution

Method used

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  • Diesel vehicle tail gas catalyst reduction composition
  • Diesel vehicle tail gas catalyst reduction composition
  • Diesel vehicle tail gas catalyst reduction composition

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The composition ratio of the present embodiment is as follows (by mass ratio):

[0028]

[0029] In this embodiment, in order to avoid the decomposition of ammonium bicarbonate in the process of preparing the solution, the steps of preparing the composition of the present invention are as follows: add 380 kg of deionized water in a 2000 kg reactor, add 210 kg of vehicle urea, and add it immediately after stirring for 2 minutes 100kg of ammonium bicarbonate, after stirring to dissolve, slowly add 60kg of methanol and 250kg of ethylene glycol, mix evenly, and filter and fill through a 0.1-0.5um filter after passing the test.

[0030] The product of this example can meet the requirements for use at a low temperature of -40°C, and can be stored in an environment from room temperature to -40°C for more than 2 years without any precipitation and crystallization.

[0031] The finished product has been tested by SGS for trace elements and meets the requirements for the use o...

Embodiment 2

[0035] The composition ratio of the present embodiment is as follows (by mass ratio):

[0036]

[0037] In the present embodiment, in order to avoid the decomposition of ammonium bicarbonate in the process of preparing the solution, the steps of preparing the composition of the present invention are as follows: add 505 kg of deionized water in a 2000 kg reactor, add 240 kg of vehicle urea, and add it immediately after stirring for 2 minutes 160kg of ammonium bicarbonate, after stirring and dissolving, slowly add 90kg of methanol and 5kg of ethylene glycol, mix evenly, filter and fill through a 0.1-0.5um filter after passing the test.

[0038] The product of this embodiment can meet the use requirements of low temperature -20°C, and it can be stored at room temperature to -20°C for more than 2 years without precipitation and any crystallization.

[0039] .

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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 [0001] The invention relates to a catalyst reducing composition for diesel vehicle exhaust, which belongs to the technical fields of automobile environmental protection and chemical industry. Background technique [0002] With the rapid development of the automobile industry, the global ecological environment is facing serious challenges, and the protection of the atmosphere and the governance of the environment have become a worldwide consensus. Developed countries in the world are actively implementing stricter exhaust emission standards. At present, as a rapidly developing country, China is also paying more and more attention to the control and treatment of exhaust emissions from internal combustion engines, and takes the Euro IV standard as the recent industrial standard. [0003] As a high-efficiency internal combustion power source, diesel engine has high fuel efficiency, good power performance, and strong durability, so it is widely used in mobile pow...

Claims

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Application Information

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IPC IPC(8): B01D53/94B01D53/56
Inventor 单猛陶佃彬杨飞曹云龙童秀凤邹密
Owner 张家港迪克汽车化学品有限公司
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