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Metal carrier triple-effect catalytic unit and method for making same

A technology of a three-way catalytic converter and a manufacturing method, which is applied to chemical instruments and methods, catalyst activation/preparation, separation methods, etc., can solve problems such as poor bonding firmness, difficult coating of an alumina transition layer, and easy fall-off, and achieve convenient Production arrangement, large promotion and application value, good effect of preheating performance

Inactive Publication Date: 2007-07-11
北京英泰世纪环境科技有限公司
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AI Technical Summary

Problems solved by technology

However, due to the smooth surface of the metal carrier, the coating of the alumina transition layer is difficult, the bonding is poor, and it is easy to fall off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] 1. Raw material selection

[0044] (1) The choice of carrier. The high-temperature resistant iron-chromium-aluminum alloy is selected as the base material to form an integrated honeycomb structure with a certain hole density.

[0045] (2) The choice of coating material carrier. The specific surface area of ​​the main coating material is 140~280m 2 / g of alumina, pore volume greater than 0.2cm 3 / g, average particle size D 90 Powder below 50 microns.

[0046] (3) Selection of additives. Lanthanum carbonate, cerium carbonate, strontium carbonate, magnesium carbonate, barium carbonate, aluminum nitrate, cobalt nitrate, ferric nitrate, cerium nitrate, zirconium nitrate, zirconium oxychloride, rare earth salts and polymer organic compounds as dispersants and stabilizers, The polymer organic compound used as the dispersant and stabilizer may be a polymer organic compound commonly used in the art, such as diethylene glycol or its derivatives, polyvinyl alcohol or its derivatives, ...

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Abstract

The invention relates to a metal carrier three-way catalyst with high performance and the manufacturing method. The method comprises metal carrier treatment, overlaying coating method and active component inducting so on. Technological characteristics are that 1, large surface area of coat can be maintained at the largest extent so as to provide good conditions for chemical reaction; 2, active components of expensive metal is distributed in uniformity so that it is favor of bringing into play the catalytic performance of expensive metal and the dosage of expensive metal is decreased and under the precondition of ensuring tail gas purified ratio the producing and using cost is decreased; 3, the process flow is short so as to arrange production in convenience; 4, there is few quality control points so as to operate and control easily.

Description

Technical field [0001] The invention relates to a high-performance metal carrier catalyst and a manufacturing method thereof. The catalyst can be widely used in the catalytic purification of exhaust gas of automobiles, motorcycles and other small general-purpose engines. Background technique [0002] As a means of transporting people and goods, motor vehicles are increasingly closely related to all aspects of people's lives. However, the pollution problem caused by the rapid increase in the number of motor vehicles has become more and more serious. [0003] There are three main harmful components of automobile exhaust: hydrocarbons, carbon monoxide and nitrogen oxides. These three substances have varying degrees of harm to the human body. At present, there are two main methods to eliminate these harmful components in automobile exhaust: one is to improve the combustion mode of the engine to reduce the emission of harmful gases; the other is to use a catalytic converter to purify ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28B01D53/94B01J32/00B01J37/02B01J35/04
CPCY02T10/22Y02T10/12
Inventor 潘陆陆石斌刘耀军杜愎刚
Owner 北京英泰世纪环境科技有限公司
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