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Synthetic method of catalyst carrier for automobile tail gas purifier

A technology of catalyst carrier and automobile exhaust, which is applied in the direction of catalyst carrier, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve problems such as catalyst poisoning

Active Publication Date: 2013-07-31
浙江东新新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, cordierite is used as the honeycomb ceramic material, but there is a case of catalyst poisoning, so choosing a new honeycomb ceramic material has become the main development direction of the exhaust gas purifier carrier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, a kind of synthetic method of catalyst carrier for automobile exhaust purifier, carry out following steps successively:

[0027] 1), preparation of honeycomb ceramic powder:

[0028] Using micron silicon carbide as base material, boron carbide as sintering aid, silicon carbide fiber as reinforcing phase, polycarbosilane as pore-forming agent, the weight ratio of micron silicon carbide, boron carbide, silicon carbide fiber and polycarbosilane is 80: After 5:5:10 mixing, honeycomb ceramic powder is obtained;

[0029] 2), mixed practice mud:

[0030] Mix water, ethylene propylene polymer (ie, ethylene propylene copolymer) and ethylene glycol to obtain a solution, and the weight ratio of water, ethylene propylene polymer and ethylene glycol is 70:15:15;

[0031] Mix the above mixed solution with the honeycomb ceramic powder according to the weight ratio of 100:70, then fully knead in a mixer at normal temperature and pressure for 0.5 hours, and stale for 2 h...

Embodiment 2

[0042] Embodiment 2, a kind of synthetic method of catalyst carrier for automobile exhaust purifier, carry out following steps successively:

[0043] 1), preparation of honeycomb ceramic powder:

[0044] Using micron silicon carbide as base material, boron carbide as sintering aid, silicon carbide fiber as reinforcing phase, polycarbosilane as pore-forming agent, the weight ratio of micron silicon carbide, boron carbide, silicon carbide fiber and polycarbosilane is 80: After 4:6:10 mixing, honeycomb ceramic powder is obtained;

[0045] 2), mixed practice mud:

[0046] Mix water, ethylene propylene polymer (ie, ethylene propylene copolymer) and ethylene glycol to obtain a solution, and the weight ratio of water, ethylene propylene polymer and ethylene glycol is 70:15:15;

[0047]The above mixed solution and honeycomb ceramic powder are fully mixed according to the weight ratio of 100:75, then fully kneaded in a mixer at normal temperature and pressure for 40 minutes, and stal...

Embodiment 3

[0058] Embodiment 3, a kind of synthetic method of catalyst carrier for automobile exhaust purifier, carry out following steps successively:

[0059] 1), preparation of honeycomb ceramic powder:

[0060] Using micron silicon carbide as base material, boron carbide as sintering aid, silicon carbide fiber as reinforcing phase, polycarbosilane as pore-forming agent, the weight ratio of micron silicon carbide, boron carbide, silicon carbide fiber and polycarbosilane is 80: After mixing 5:6:9, honeycomb ceramic powder is obtained;

[0061] 2), mixed practice mud:

[0062] Mix water, ethylene propylene polymer (ie, ethylene propylene copolymer) and ethylene glycol to obtain a solution, and the weight ratio of water, ethylene propylene polymer and ethylene glycol is 70:15:15;

[0063] Mix the above mixed solution with the honeycomb ceramic powder according to the weight ratio of 100:75, then fully knead in a mixer at normal temperature and pressure for 50 minutes, and stale for 2.5...

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Abstract

The invention discloses a synthetic method of a catalyst carrier for an automobile tail gas purifier. The synthetic method comprises the steps as follows: 1), micron silicon carbide is used as a base material, boron carbide is used as a sintering aid, silicon carbide fiber is used as a reinforcing phase, polycarbosilane is used as a pore-forming agent, and the micron silicon carbide, the boron carbide, the silicon carbide fiber and the polycarbosilane are mixed to obtain honeycomb ceramic powder; 2), water, an ethylene-propene polymer and ethylene glycol are mixed to obtain a solution, the solution is mixed with the honeycomb ceramic powder at a weight ratio of 100 : 65 to 80, and an obtained mixture is mulled and aged to obtain pug; 3), the plug is subjected to the extrusion molding; 4),obtained bisque is dried; and 5) a product obtained after the bisque in the step 4) is dried is sintered for 1 to 6 hours at normal pressure and at a temperature of 1800 DEG C to 2200 DEG C, and thenthermally preserved for 1 to 2 hours at a temperature of 1000 DEG C to 1200 DEG C to obtain the catalyst carrier for the automobile tail gas purifier. The catalyst carrier for the automobile tail gaspurifier, which is produced by using the method, has the characteristics that the specific surface area is large, the strength meets the requirements, and the like.

Description

technical field [0001] The invention relates to a method for preparing a catalyst carrier for an automobile tail gas purifier. Background technique [0002] With the rapid development of the national economy, the environmental pollution caused by the transportation industry is becoming more and more serious. The test results of the air quality in major cities at home and abroad show that: automobile exhaust is the main source of air pollution. Automobile exhaust contains CO, NOx and hydrocarbons. Although these components account for a small proportion, they are all harmful and have a strong pungent smell and carcinogenic effect. In order to solve this problem, countries all over the world tend to use exhaust gas purifiers. The operating conditions of automobiles are very complex, so the working environment of exhaust gas purifiers is also complex and changeable. Generally, exhaust gas purifiers first have to withstand the impact of cold and heat exchange from ambient temp...

Claims

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Application Information

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IPC IPC(8): B01J32/00C04B38/00
Inventor 杨辉郭兴忠郑志荣高黎华
Owner 浙江东新新材料科技有限公司
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