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Urea reducing agent solution for vehicles

A technology of urea reducing agent and solution, which is applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., and can solve problems such as corrosion of exhaust pipes

Inactive Publication Date: 2018-10-09
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent CN102213126A uses additives such as low-molecular alcohol and ammonium formate, which has exposed the problem of thermal decomposition products corroding exhaust pipes in practical applications

Method used

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  • Urea reducing agent solution for vehicles
  • Urea reducing agent solution for vehicles
  • Urea reducing agent solution for vehicles

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Take 25% analytically pure urea, 20% analytically pure formamide, 3% analytically pure glycine, analytically pure ammonium bicarbonate 7%, and high-purity water 45% according to the mass fraction. After stirring at room temperature (25°C) until fully dissolved, That is, the low-temperature vehicle urea solution of the present invention has a freezing point of -26°C.

Embodiment 2

[0020] Take 20% analytically pure urea, 20% analytically pure formamide, 3% analytically pure glycine, analytically pure ammonium bicarbonate 7%, and high-purity water 50% according to the mass fraction. After stirring at room temperature (25°C) until fully dissolved, That is, the low-temperature urea solution for vehicles of the present invention has a freezing point of -25°C.

Embodiment 3

[0022] Take analytically pure urea 25%, analytically pure formamide 15%, analytically pure glycine 3%, analytically pure ammonium bicarbonate 7%, and high-purity water 50% according to mass fraction, and stir at room temperature (25°C) until it is completely dissolved. That is, the low-temperature urea solution for vehicles of the present invention has a freezing point of -25°C.

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Abstract

The invention discloses a urea reducing agent solution for vehicles and belongs to the field of waste gas treatment. The urea reducing agent solution is prepared from the following raw materials in percentage by mass: 20 to 28 percent of urea, 10 to 25 percent of micromolecular amide with less than C3, 1 to 5 percent of glycine, 0 to 10 percent of ammonium hydrogen carbonate or ammonium carbonateand 35 to 68 percent of ultrapure water for balancing total mass percentage. The invention provides the urea solution for vehicles, wherein the solidification point is -24 to -28 DEG C.

Description

Technical field [0001] The invention belongs to the field of exhaust gas treatment, and relates to a formula of a reducing agent for diesel engine tail gas treatment. Background technique [0002] At present, environmental pollution is a major social problem, and it is becoming more and more serious. While enjoying the benefits of scientific and technological progress, people have to bear the destruction of the environment by industrialization. Among all kinds of environmental pollution, the most closely related to people's lives is air pollution, and among the many causes of air pollution, the pollution of various vehicle exhaust occupies a large part. Large vehicles such as trucks, large and medium buses, and train locomotives are all powered by diesel engines. Compared with gasoline engines, diesel engines have many advantages such as high efficiency and strong power, but it is undeniable that the pollution caused by diesel combustion is more serious than gasoline engines, an...

Claims

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Application Information

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IPC IPC(8): B01D53/94B01D53/56
CPCB01D53/9409B01D2251/2067
Inventor 柳嘉澍夏浩喻王聪唐宋元任晓乾
Owner NANJING UNIV OF TECH
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