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Preparation method of high-storing-capacity high-thermal-stability oxygen storage material

An oxygen storage material and stable technology, applied in the direction of oxygen preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor thermal stability and low oxygen storage performance of oxygen storage materials, and achieve improved thermal stability and oxygen storage capacity, protection of the pore structure, and the effect of reducing surface tension

Inactive Publication Date: 2018-02-16
高俊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the defects of poor thermal stability and low oxygen storage performance of current oxygen storage materials, a preparation method of high oxygen storage and high thermal stability oxygen storage materials is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Weigh 6g of cerium nitrate, 4g of zirconium nitrate, 3g of aluminum nitrate and 2g of yttrium nitrate and mix them in a beaker with 80mL of deionized water and stir for 12min. After stirring, add 6mL of hydrogen peroxide with a concentration of 2mol / L and 4g of white sugar into the beaker and 3mL of polyethylene glycol solution with a concentration of 2mol / L, continue to mix and stir for 1h to obtain a modified self-made nitrate solution, the mass fraction is 30% ammonium carbonate solution, and the mass fraction is 1:1:1 20% sodium hydroxide solution and 10% ammonia water were mixed and stirred for 6 minutes to obtain a self-made alkaline precipitant, and the boron mud and aluminum hydroxide were ground for 6 minutes according to the mass ratio of 2:1 and passed through a 100-mesh sieve to collect the Sieve the powder, mix and stir the sieved powder, titanate coupling agent KR-9S and honey for 10 minutes according to the mass ratio of 4:2:1 to obtain the modified sieved...

example 2

[0025]Weigh 7g of cerium nitrate, 5g of zirconium nitrate, 4g of aluminum nitrate and 3g of yttrium nitrate and mix them in a beaker with 90mL of deionized water and stir for 14min. After stirring, add 8mL of hydrogen peroxide with a concentration of 2mol / L and 5g of white sugar into the beaker and 4mL polyethylene glycol solution with a concentration of 2mol / L, continue to mix and stir for 1.5h to obtain a modified self-made nitrate solution, and the mass fraction is 30% ammonium carbonate solution, mass fraction Mix and stir 20% sodium hydroxide solution and 10% ammonia water for 7 minutes to obtain a self-made alkaline precipitant, grind boron mud and aluminum hydroxide for 7 minutes according to the mass ratio of 2:1, pass through a 100-mesh sieve, and collect Sieve the powder, mix and stir the sieve powder, titanate coupling agent KR-9S, and honey for 11 minutes according to the mass ratio of 4:2:1 to obtain the modified sieve powder sol, which is weighed in parts by weigh...

example 3

[0027] Weigh 8g of cerium nitrate, 6g of zirconium nitrate, 5g of aluminum nitrate and 4g of yttrium nitrate and mix them in a beaker with 100mL of deionized water and stir for 16min. After stirring, add 10mL of hydrogen peroxide with a concentration of 2mol / L and 6g of white sugar into the beaker and 5mL of polyethylene glycol solution with a concentration of 2mol / L, continue to mix and stir for 2h to obtain a modified self-made nitrate solution, the mass fraction is 30% ammonium carbonate solution, and the mass fraction is 1:1:1 20% sodium hydroxide solution and 10% ammonia water were mixed and stirred for 8 minutes to obtain a self-made alkaline precipitant, and the boron mud and aluminum hydroxide were ground for 8 minutes according to the mass ratio of 2:1 and passed through a 100-mesh sieve to collect the Sieve the powder, mix and stir the sieved powder, titanate coupling agent KR-9S and honey for 12 minutes according to the mass ratio of 4:2:1 to obtain the modified siev...

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Abstract

The invention relates to the technical field of preparation of oxygen storage materials, in particular to a preparation method of a high-storing-capacity high-thermal-stability oxygen storage material; a solution of hydrogen peroxide, white sugar and polyethylene glycol is used to modify cerium nitrate, zirconium nitrate, aluminum nitrate and yttrium nitrate, high-temperature calcining is performed then; the white sugar may bind with other ingredients in the oxygen storage material; by adding polyethylene glycol solution, ions can be dispersed evenly, the specific surface area is increased, and oxygen-storing capacity of the oxygen storage material is improved. The surfactant, the polyethylene glycol solution, added herein may be effectively protected during calcining. Precipitate convertsslowly into oxide during calcining, and thermal stability and oxygen-storing capacity of the oxygen storage material are improved. Boric sludge and aluminum hydroxide are added, the modified aluminumhydroxide is decomposed into alumina at high temperature during reaction, and accordingly the thermal stability of the oxygen storage material is further improved; the preparation method has a promising application prospect.

Description

technical field [0001] The invention relates to the technical field of preparation of oxygen storage materials, in particular to a preparation method of a high oxygen storage and high thermal stability oxygen storage material. Background technique [0002] Oxygen storage material is a composite oxide that can store and release oxygen reversibly. It is a binary or multiple composite oxide composed of rare earth elements, alkaline earth metal elements or transition metal elements mainly composed of cerium oxide. Generally in powder form, mainly yellow, brown and so on. Mainly used in automobile and motorcycle exhaust treatment. [0003] With the rapid development of the economy, more and more families own private cars, and motor vehicle exhaust has become the main source of urban air pollution. The main harmful components contained in automobile exhaust are carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx). Cerium-zirconium solid solution oxygen storage mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/10C01B13/02
CPCC01B13/02B01J23/002B01J23/10B01J2523/00B01J35/613B01J2523/31B01J2523/3712B01J2523/36B01J2523/48B01J2523/47
Inventor 高俊杨立军张淑娴
Owner 高俊
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