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Method for producing exhaust gas purification catalyst

A technology of exhaust gas purification and manufacturing method, which is applied in the directions of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effect of simple and good reproducibility

Pending Publication Date: 2022-03-22
N E CHEMCAT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, diesel engines, which are more likely to emit particulate matter than gasoline engines, have strictly limited the amount of particulate matter discharged, but in recent years, restrictions on the amount of particulate matter discharged have also been strengthened in gasoline engines.

Method used

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  • Method for producing exhaust gas purification catalyst
  • Method for producing exhaust gas purification catalyst
  • Method for producing exhaust gas purification catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Polyvinyl alcohol (hereinafter referred to as "PVA") was mixed with ion-exchanged water to prepare a 1.0% by mass PVA aqueous solution. Next, a wall-flow type honeycomb substrate made of cordierite (number of cells / mil thickness: 300 cells / 8 mil, diameter: 118.4 mm, overall length: 127 mm) was prepared. The end of the substrate on the exhaust gas introduction side was immersed in the above-mentioned PVA aqueous solution, and vacuum suction was performed from the opposite end to impregnate and hold the PVA aqueous solution in the substrate. Introduce gas vertically downward into the substrate from the end face side impregnated and held with the PVA aqueous solution, apply the PVA aqueous solution to the surface inside the pores of the partition wall of the substrate, and blow off the excess from the end of the gas discharge side. Amount of PVA aqueous solution. At this time, blowing was performed until the PVA aqueous solution no longer came out from the gas discharge s...

Embodiment 2

[0096] An exhaust gas purification catalyst was produced in the same manner as in Example 1, except that PVA and ion-exchanged water were mixed to prepare and use a 3.0% by mass PVA aqueous solution.

Embodiment 3

[0098] The coating of the catalyst slurry was performed in the same manner as in Example 1 except that the coating amount of the catalyst after firing was 40.6 g (excluding the mass of the platinum group metal) per 1 L of the substrate. Exhaust gas purification catalyst.

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Abstract

The present invention relates to a method for producing an exhaust gas purification catalyst for purifying exhaust gas discharged from an internal combustion engine, the manufacturing method includes a base material preparation step of preparing a treated wall flow type base material 100 in which a solid resin 21 is adhered to a partition wall, and a catalyst application step of applying a catalyst slurry 31a to the partition wall, the adhesion amount of the solid resin 21 being 1.50-9.41 g / L.

Description

technical field [0001] The present invention relates to a method for producing an exhaust gas purification catalyst and the like. Background technique [0002] Exhaust gas discharged from an internal combustion engine is known to contain particulate matter (PM) mainly composed of carbon, ash (ash) formed of non-combustible components, and the like, and is known to cause air pollution. Conventionally, diesel engines, which are more likely to discharge particulate matter than gasoline engines, have strictly limited the amount of particulate matter to be discharged. However, in recent years, restrictions on the amount of particulate matter to be discharged have also been strengthened in gasoline engines. [0003] As a means for reducing the discharge amount of particulate matter, there is known a method of installing a particulate filter for the purpose of depositing and trapping particulate matter in an exhaust gas passage of an internal combustion engine. In particular, in r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J35/04B01J37/02F01N3/022F01N3/035B01D53/94
CPCB01J23/63B01J37/0215B01D53/945F01N3/035F01N3/022B01J35/56B01D2258/012B01D2255/2092B01D2255/20715B01D2255/2063B01D2255/1023B01D2255/1025B01D2255/407B01D2255/9207B01D2255/9155F01N3/0222C04B38/0006C04B2111/00793C04B2111/0081B01J37/0203B01J37/0207B01J37/0244B01J35/19C04B35/195C04B38/0054C04B38/0074
Inventor 望月大司原浩幸高山豪人高桥祯宪
Owner N E CHEMCAT
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