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Application of copper ferrite magnet as three-way catalyst for automobile engine exhaust gas treatment

A three-way catalyst and exhaust gas treatment technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, iron compounds, etc., can solve adverse air pollution, control, and high price of finished catalysts and other issues, to achieve the effect of fast response and low cost

Inactive Publication Date: 2019-10-18
NAT KAOHSIUNG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the above-mentioned inventions is that precious metals such as platinum, rhodium, and palladium need to be used. Due to the low output of precious metals and the high price, the price of the finished catalyst is very expensive, which is not conducive to the prevention and control of air pollution. need

Method used

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  • Application of copper ferrite magnet as three-way catalyst for automobile engine exhaust gas treatment
  • Application of copper ferrite magnet as three-way catalyst for automobile engine exhaust gas treatment
  • Application of copper ferrite magnet as three-way catalyst for automobile engine exhaust gas treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Synthesis of Copper Ferrite Magnet Catalyst (Cu / Fe=1 / 2.5)

[0038] This embodiment provides two kinds of methods for preparing copper ferrite magnet catalysts with different particle sizes:

[0039] (1) According to the required molar ratio (Cu 2+ / Fe 2+ =1 / 2.5) Weigh the correct amount of CuSO 4 with FeSO 4 Put it into a reactor, add 1 liter of deionized water and stir to dissolve completely; add 6N sodium hydroxide (NaOH) to adjust the pH value to 9.5, and then heat to raise the solution temperature to 80°C. After the temperature and pH value were stabilized, air was supplied to the solution at a rate of 3 L / min, and the reaction conditions were maintained until the reading of the oxidation-reduction potential (ORP) meter turned and rose rapidly, so as to obtain the initial solid product of copper ferrite magnet. The particle size distribution of the copper ferrite magnet prepared by this method is about 20-150nm.

[0040] (2) According to the required...

Embodiment 2

[0042] Example 2: Discussion on the efficiency of removing carbon monoxide by copper ferrite magnet catalyst under low oxygen concentration

[0043] see figure 2 , even under the condition that the oxygen concentration is only 1%, the copper ferrite magnet can still convert carbon monoxide into carbon dioxide at a temperature within 160 ℃ and remove it.

Embodiment 3

[0044] Example 3: Discussion on the efficiency of the copper ferrite magnet catalyst for removing hydrocarbons under low oxygen concentration

[0045] see image 3 , even under the condition of only 1% oxygen concentration, copper ferrite magnets can still remove hydrocarbons at temperatures within 270 °C.

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Abstract

The invention relates to application of copper ferrite as a three-way catalyst in treating automobile engine exhaust, wherein the copper ferrite contains copper and iron having a molar ratio of 1:2 to1:10; the copper ferrite is effective in removing nitric oxides, carbon monoxide and hydrocarbons, and self-cleaning surface accumulated carbon.

Description

technical field [0001] The present invention relates to the use of a copper ferrite magnet (Cu-ferrite) as a three-way catalyst for automobile engine exhaust gas treatment, especially the application of using a copper ferrite magnet to make a three-way catalyst to effectively remove pollutants in automobile exhaust gas; therefore , which can solve the problem of expensive catalytic converter due to the traditional use of noble metal catalysts. Background technique [0002] Nitrogen oxides (NOx) from vehicles X ), carbon monoxide (CO) and hydrocarbons (HC) are the main culprits of urban air pollution. All countries in the world have formulated regulations to regulate the amount of pollutant emissions and are becoming increasingly stringent. During the operation of the car engine, gasoline cannot be completely combusted to produce CO and HC, and nitrogen and oxygen are combined to form NO at high temperature x is the main cause of these pollutants. Decades of experience hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J23/80B01J23/83B01J23/889B01D53/94C01G49/00B82Y30/00
CPCY02A50/20Y02T10/12
Inventor 张健桂许兆民涂耀仁
Owner NAT KAOHSIUNG UNIV OF SCI & TECH