Conductive honey comb ceramic catalyst carrier and its preparation method

A technology of catalyst carrier and honeycomb ceramics, which is applied in the direction of catalyst carrier, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems that automobile exhaust cannot be purified in time, it takes a long time to start, and it has not been completely solved. To achieve the effect of ensuring smooth and effective work, easy molding, and simplified production process

Inactive Publication Date: 2006-08-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it also has many disadvantages, such as large heat capacity, and it takes a long time to start, at least 3 to 10 minutes, to make the catalyst work effectively
However, studies have shown that 3 to 10 minutes after start-up is the time when car pollution is the most serious. The delayed activation of the catalyst prevents the exhaust gas from being cleaned in time after start-up, and the problem of environmental pollution has not been completely resolved.

Method used

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  • Conductive honey comb ceramic catalyst carrier and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Titanium dioxide (TiO2) purified from mines 2 ), the boron trioxide powder (B 2 o 3 ), common industrial pure aluminum powder (Al) is raw material, and the purity of three kinds of powders is all 98%, and particle size is all>200 orders, and above three kinds of powders are pressed Al:TiO 2 :B 2 o 3 =37.6%: 33.3%: 29.1% weight percentage is evenly mixed, and 2% gum arabic is added to form a dough, and the honeycomb ceramic carrier pottery embryo is formed by extrusion technology. Heat treatment at 200°C for 0.5-2 hours, and then use electric spark or laser beam to ignite self-propagating high-temperature synthesis to obtain the finished product. The product performance analysis table is as follows:

[0026] main chemical ratio

Embodiment 2

[0028] Except that the percentage weight ratio of the raw material is Al:TiO 2 :B 2 o 3 =40%: 32%: 28%, add 10% gum arabic bonding, carry out heat treatment at 400 ℃, other processes are the same as embodiment 1, make finished product.

[0029] main chemical ratio

Embodiment 3

[0031] Except that the percentage weight ratio of the raw material is Al:TiO 2 :B 2 o 3 =38.8%: 32.6%: 28.6%, add 5% gum arabic bonding, carry out heat treatment at 300 ℃, other processes are the same as embodiment 1, make finished product.

[0032] main chemical ratio

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Abstract

An electrically conductive cellular ceramic as the carrier of catalyst used for car is prepared from purified titanium oxide or Ti powder, graphite powder and pure Al powder through proportionally mixing, adding organic adhesive, stirring, die pressing, heat treating, igniting and self burning for high temp synthesis.

Description

[0001] The present invention is a divisional application titled "Conductive Honeycomb Ceramic Catalyst Carrier and Its Preparation Method" (application number: 02113513.4, filing date: March 25, 2002). technical field [0002] The invention relates to a catalyst carrier for a vehicle, more specifically, the invention relates to a ceramic carrier material used in a catalytic converter for exhaust gas of an automobile. At the same time, the present invention also relates to a preparation method of the catalyst carrier. Background technique [0003] The development of modern society has led to a substantial increase in the number of automobiles, and the pollution generated by exhaust emissions has also increased significantly. Developed areas where cars are concentrated, especially big cities. Pollution from tail gas emissions has accounted for 50% to 60% of air pollution in these areas. With people's emphasis on the living ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00
Inventor 陈庆华孙俊赛张正富郭玉忠
Owner KUNMING UNIV OF SCI & TECH
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