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Vehicle urea that can degrade nitrogen oxides and prevent low-temperature crystallization

A low-temperature crystallization, vehicle-use urea technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, chemical elements of heterogeneous catalysts, etc., can solve the problem of substandard exhaust emissions and low urea conversion rate , the increase of automobile fuel consumption and other problems, to achieve the effect of improving the conversion rate, improving the dispersion, and increasing the conversion rate

Active Publication Date: 2022-07-12
HENAN HONGKANG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for generating vehicle urea that can degrade nitrogen oxides and prevent low-temperature crystallization, so as to solve the problem of existing urea NO X Technical problems such as low conversion rate, high freezing point, increased vehicle fuel consumption, and substandard exhaust emissions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of urea for vehicles that can degrade nitrogen oxides and prevent low-temperature crystallization, the urea comprises the following components in parts by weight, 10 parts of urea, 19 parts of ammonium sulfate, 4 parts of ethanolamine, 3 parts of dimethicone, 3 parts of propylene Triol 4, 0.5 part of alkyl glucoside, 100 parts of ultrapure water, 0.8 part of nano-catalyst, 2 parts of silicon type antifreeze; wherein, the preparation method of nano-catalyst is as follows:

[0026] 1) Take equal mass of ammonium metavanadate and citric acid, prepare a solution with a mass fraction of 0.9-1.0% with deionized water, add 0.45% sodium metaaluminate according to the mass of the solution, and add nano-scale WO during the stirring process 3 / TiO 2 The mixed powder was subjected to ultrasonic vibration for 45 minutes, placed in a temperature-controlled electric furnace for calcination at a high temperature of 560 °C for 1.5 hours, and then naturally cooled to...

Embodiment 2

[0034] Example 2: The difference from Example 1 is:

[0035] A vehicle urea capable of degrading nitrogen oxides and preventing low-temperature crystallization, the urea comprises the following components in parts by weight: 13 parts of urea, 23 parts of ammonium sulfate, 7 parts of ethanolamine, 5 parts of dimethicone, 6 parts of glycerin parts, 1.5 parts of alkyl glucoside, 100 parts of ultrapure water, 1 part of nano-catalyst, and 3 parts of silicon type antifreeze; wherein, the preparation method of nano-catalyst is as follows:

[0036]1) Take 90g ammonium metavanadate and 90g citric acid, dissolve in 1000ml deionized water to prepare a solution, add 0.48% sodium metaaluminate according to the mass of the solution, and add nano-scale WO during the stirring process 3 / TiO 2 The mixed powder was subjected to ultrasonic vibration for 30 minutes, placed in a temperature-controlled electric furnace, and calcined at a high temperature of 560 °C for 1.5 hours, and then naturally...

Embodiment 3

[0044] Example 3: The difference from Example 1 is:

[0045] A vehicle urea capable of degrading nitrogen oxides and preventing low-temperature crystallization, the urea comprises the following components in parts by weight: 12 parts of urea, 213 parts of ammonium sulfate, 5 parts of ethanolamine, 5 parts of dimethyl silicone oil, 6 parts of glycerin 1 part of alkyl glucoside, 100 parts of ultrapure water, 1 part of nano-catalyst, and 3 parts of silicon-type antifreeze; wherein, the preparation method of nano-catalyst is as follows:

[0046] 1) Take the same mass of ammonium metavanadate and citric acid, prepare a solution with a mass fraction of 1.0% with deionized water, add 0.45-0.50% sodium metaaluminate according to the mass of the solution, and add nano-scale WO during the stirring process. 3 / TiO 2 The mixed powder was subjected to ultrasonic vibration for 45 minutes, placed in a temperature-controlled electric furnace for calcination at a high temperature of 555 °C fo...

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PUM

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Abstract

The invention discloses a vehicle urea capable of degrading nitrogen oxides and preventing low-temperature crystallization, comprising the following components in parts by weight: 10-13 parts of urea, 19-23 parts of ammonium sulfate, 4-7 parts of ethanolamine and dimethyl silicone oil 3 to 5 parts, 4 to 6 parts of glycerol, 0.5 to 1.5 parts of alkyl glucoside, 100 parts of ultrapure water, 0.8 to 1 part of nano catalyst, and 2 to 3 parts of silicon antifreeze. To solve the existing urea NO X The technical problems of low conversion rate, high freezing point, increased fuel consumption of automobiles and substandard exhaust emissions.

Description

technical field [0001] The invention relates to the technical field of vehicle urea solution production, in particular to a vehicle urea capable of degrading nitrogen oxides and preventing low-temperature crystallization. Background technique [0002] Vehicle urea is a high-purity urea solution developed in recent years and suitable for SCR system (selective catalytic reduction system). After the urea solution is vaporized, it decomposes to produce NH 3 , under the action of catalyst, NH 3 with NO in exhaust X The reaction produces harmless H 2 O and N 2 . [0003] However, urea is decomposed into NH in automotive diesel engines. 3 The intermediate product NO produced in the process x , NO x It is the general term for all nitrogen oxides, which are extremely harmful to human health. NO x The formed secondary pollutant ozone is also particularly harmful to the human respiratory system, because particulate matter suspended in the air can cause lung and heart disease a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/94B01D53/56B01J23/30F01N3/20
CPCB01D53/9418B01J23/30B01J23/002B01J35/023F01N3/2066B01D2251/2067B01D2258/012B01J2523/00F01N2610/02B01J2523/47B01J2523/55B01J2523/69Y02T10/12
Inventor 李丰登孙长城桑书梅
Owner HENAN HONGKANG ENVIRONMENTAL PROTECTION TECH
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