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A kind of preparation method of non-precious metal soot combustion catalyst

A soot combustion, non-precious metal technology, applied in combustion methods, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of easy deactivation, high production cost, and poor thermal stability of precious metal catalysts And other issues

Active Publication Date: 2019-07-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although noble metal catalysts have excellent catalytic oxidation performance, the thermal stability of noble metal catalysts is poor, they are easily deactivated when exposed to water, there is a "sulfur poisoning" reaction, and the production cost is high, which restricts their practical application.

Method used

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  • A kind of preparation method of non-precious metal soot combustion catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) According to the molar ratio of Pr and Zr=0.1:0.9, weigh 0.004mol (1.74g) Pr(NO 3 ) 3 ·6H 2 O and 0.036 mol (11.6 g) ZrOCl 2 ·8H 2 O, respectively dissolved in 10mL and 90mL of absolute ethanol, respectively prepared into ethanol solutions with a concentration of 0.4mol / L after ultrasonication and stirring, and mixed the two evenly;

[0021] (2) According to (Pr(NO 3 ) 3 ·6H 2 O+ZrOCl 2 ·8H 2 O) The mass ratio to the template agent F127 is 20:1, weigh 0.67g triblock copolymer F127 and dissolve it in 13mL absolute ethanol to prepare a solution with a concentration of 0.05g / mL;

[0022] (3) Stir the mixed solution of step (1) in a water bath at 40°C, and add the ethanol solution of F127 into the mixed solution of step (1) dropwise;

[0023] (4) Add NaOH ethanol solution to the mixture obtained in step (3) to adjust the pH to 9, and continue stirring for 3 hours;

[0024] (5) Transfer the mixture obtained in step (4) to an Erlenmeyer flask, and cultivate it i...

Embodiment 2

[0028] (1) According to the molar ratio of Pr and Zr=0.2:0.8, weigh 0.008mol (3.48g) Pr(NO 3 ) 3 ·6H 2 O and 0.032mol (10.31g) ZrOCl 2 ·8H 2 O was dissolved in 16mL and 64mL of absolute ethanol respectively, and after ultrasonication and stirring, they were respectively prepared into solutions with a concentration of 0.5mol / L, and the two were mixed evenly;

[0029] (2) According to (Pr(NO 3 ) 3 ·6H 2 O+ZrOCl 2 ·8H 2 O) The mass ratio to the template agent F127 is 10:1, weigh 1.38g triblock copolymer F127 and dissolve it in 13.8mL absolute ethanol to prepare a solution with a concentration of 0.1g / mL;

[0030] (3) Stir the mixed solution in step (1) in a water bath at 50°C, and add the ethanol solution of F127 into the mixed solution drop by drop;

[0031] (4) Add NaOH ethanol solution to the mixture obtained in step (3) to adjust the pH to 9.5, and continue stirring for 4 hours;

[0032] (5) Transfer the mixture obtained in step (4) to an Erlenmeyer flask, and culti...

Embodiment 3

[0036] (1) According to the molar ratio of Pr and Zr=0.3:0.7, weigh 0.012mol (5.22g) Pr(NO 3 ) 3 ·6H 2 O and 0.028mol (12.02g) Zr(NO 3 ) 4 ·5H 2 O, respectively dissolved in 12mL and 28mL of absolute ethanol, after ultrasonication and stirring, were respectively prepared into solutions with a concentration of 1mol / L, and the two were mixed evenly;

[0037] (2) According to (Pr(NO 3 ) 3 ·6H 2 O+Zr(NO 3 ) 4 ·5H 2 O) The mass ratio to the template agent P123 is 5:1, weigh 3.45g triblock copolymer P123 and dissolve it in 6.9mL absolute ethanol, and prepare a solution with a concentration of 0.5g / mL;

[0038] (3) Stir the mixed solution in step (1) in a water bath at 60°C, and add the ethanol solution of P123 into the mixed solution drop by drop;

[0039] (4) Add NaOH ethanol solution to the mixture obtained in step (3) to adjust the pH to 10, and then continue to stir for 5 hours;

[0040] (5) Transfer the mixture obtained in step (4) to an Erlenmeyer flask, and cultiv...

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Abstract

The invention relates to preparation method of non precious metal charcoal smoke combustion catalyst, in particular relates to meso structured Pr(i) x ( / i) Zr (i) 1- x ( / i) O (i) 2 ( / i) solid solvent catalyst preparation method, adopting Pr(NO3) 3 as praseodymium source, ZrOCl2 or Zr (NO3) 4 as zirconium source, tri-block copolymer F127 or P123 as template agent to prepare meso structure Pr(i) x ( / i) Zr (i) 1- x ( / i) O 2 solid solvent catalyst. The produce Pr(i) x ( / i) Zr (i) 1- x ( / i) O 2 composes meso structure material, possesses good points of larger than surface area, large hole volume, adjustable hole volume and more; being solid liquid body, strong oxygen store ability, strong oxygenation restore ability, high heat stability and more.

Description

technical field [0001] The present invention relates to a kind of preparation method of non-noble metal soot combustion catalyst, be specifically related to the Pr x Zr 1-x o 2 A preparation method of a solid solution catalyst belongs to the technical field of applied catalysis. Background technique [0002] Soot particulate matter (PM), as the main pollutant in diesel vehicle exhaust, is the "culprit" of smog, which has caused great harm to human health and the living environment. The development of clean energy, the development of diesel engine purification technology and the post-treatment of diesel vehicle exhaust are the three main aspects of controlling pollutant emissions. However, due to the constraints of technical level and economic cost, clean fuel and in-machine purification technology have not yet been widely used. At present, the use of after-treatment devices specially designed for off-machine purification of soot particles - particulate filters (DPF) to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10F23G7/07
CPCB01J23/10F23G7/07
Inventor 王华李宏程李孔斋曾良鹏施从志刑艳彬
Owner KUNMING UNIV OF SCI & TECH