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Catalyst carrier for purification of exhausted gas, method for preparing the same, and catalyst for purification of exhausted gas

A catalyst carrier, a technology for purifying exhaust gas, applied in catalyst carrier, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve problems such as difficulty in controlling porosity and morphology, and reducing the diffusion distance of reactants

Inactive Publication Date: 2015-08-12
HYUNDAI MOTOR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, conventional techniques that only include a simple evaporation process are difficult to control the porosity and morphology to reduce the diffusion distance between reactants

Method used

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  • Catalyst carrier for purification of exhausted gas, method for preparing the same, and catalyst for purification of exhausted gas
  • Catalyst carrier for purification of exhausted gas, method for preparing the same, and catalyst for purification of exhausted gas
  • Catalyst carrier for purification of exhausted gas, method for preparing the same, and catalyst for purification of exhausted gas

Examples

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preparation example Construction

[0058] The method for preparing a catalyst carrier for purifying exhaust gas according to the present invention may include: preparing a substrate 10 and a ceramic slurry 20 including a plurality of chamber paths separated by chamber barrier ribs; immersing the substrate in the ceramic slurry Slurry to coat the substrate with ceramic slurry; remove excess ceramic slurry; provide a temperature gradient 50 in a direction perpendicular to the substrate to freeze in one direction the ceramic slurry coating layer formed on the inner surface of the chamber path ; removing solvent crystals 60 from the ceramic slurry coating layer frozen in one direction; and heat treating the ceramic slurry coating layer.

[0059] A base material including a plurality of cell paths separated by cell barrier ribs is shown to have a honeycomb structure, but it may have any structure as long as it is a structure having a honeycomb path-like structure generally used as a catalyst for purifying exhaust gas...

Embodiment 1

[0077] Embodiment 1: by the weight of alumina particles (Al 2 o 3 , powder particles with an average particle diameter of 1 μm, Kyung Do Fine Chemicals Co., Ltd.), stirring 5 wt% polyvinyl alcohol (PVA, average molecular weight 124,000-186,000 (g / mol), Sigma Aldrich Korea) at about 50°C 24 hours and dissolved it in distilled water, and added 25wt% alumina particles into the solution and dispersed using a probe sonicator. The probe sonicator has the following conditions. Sonication was performed for a total of 10 minutes at 30% amplitude of a probe sonicator with an output of 750 watts at 20 kHz (intervals of 10 seconds on + 10 seconds off).

[0078] After immersing the carrier substrate 10 having a porous honeycomb structure in the alumina slurry for about 1 minute and then removing it, at about 30 kg / cm 2 The ceramic slurry coated carrier substrate 30 was treated with an air knife at an intensity of 30 seconds for about 30 seconds to remove excess slurry, and was then plac...

Embodiment 2

[0081] Example 2: A catalyst carrier for purifying exhaust gas was prepared according to the same procedure as in Example 1 except that alumina particles were used at 30 wt % instead of 25 wt %. Figure 11 The surface of the alumina paint layer obtained in Example 2 is shown.

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Abstract

A catalyst carrier for purification of exhaust gas, may include a substrate having a plurality of cell paths partitioned by a cell barrier rib and a ceramic coating layer positioned on the inside surface of the cell path, where the ceramic coating layer has a porous lamellar structure arranged in an exhaust gas flow direction, and a method for preparing the same.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2014-0015625 filed on February 11, 2014, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to a catalyst carrier for purifying exhaust gas, a preparation method thereof, and a catalyst for purifying exhaust gas. Background technique [0004] Harmful substances in vehicle exhaust include unburned HC, CO, and nitrogen oxides (NO x ). Because all vehicles powered by gasoline or diesel engines produce exhaust gases that contain harmful substances. As the number of vehicles increases year by year, many countries in the world strictly regulate the amount of exhaust gas and strengthen fuel efficiency standards. Therefore, all vehicles require devices for suppressing generation of harmful substances or purifying harmful substances. A catalytic converter for vehicles is called a thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J37/32B01D53/94B01J35/00
CPCB01J21/12B01J35/04B01J37/0219B01J21/04B01J37/32B01D53/945C23C24/085B01D2255/102B01D2255/104B01D2255/106B01D2255/2065B01D2255/20707B01D2255/20715B01D2255/20723B01D2255/2073B01D2255/20738B01D2255/20746B01D2255/20753B01D2255/20761B01D2255/20769B01D2255/20792B01D2255/405B01D2255/9202B01D2255/9205B01D2258/012Y10T428/24149Y02T10/12B01J35/56B01J21/00F01N3/10F01N3/28
Inventor 李孝京郑镇宇李钟辉金昞守
Owner HYUNDAI MOTOR CO LTD