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Roasting method of automobile exhaust three-way catalyst

A three-way catalyst, automobile exhaust technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as insufficient uniformity, unsatisfactory catalyst purification effect, etc. uniform roasting effect

Active Publication Date: 2020-07-14
柳州新开超华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current three-way catalysts usually adopt a double-coating structure, and the coating is not evenly baked, which leads to the unsatisfactory purification effect of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be described in detail below, and the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0017] The roasting method of automobile exhaust three-way catalyst comprises the following steps:

[0018] Firstly, convey the coated carrier to the circular horizontal furnace for drying; before that, place several coated carriers on the conveying path in an end-to-end manner, and then push one end of the conveying path The carrier at the other end of the conveying path enters the horizontal furnace path, thereby ensuring the safety and convenience of conveying and facilitating the realization of automated production. The horizontal furnace of the present invention includes a drying area and a roasting area, and the carrier is first dried in the drying area, and then transported to the roasting area for heating and roasting. Due to the large temperature dif...

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Abstract

The invention relates to the field of automobile exhaust purification, in particular to a method for roasting a three-way catalyst for automobile exhaust, comprising: transporting a coated carrier to an annular horizontal furnace for drying; and then heating and roasting the peripheral wall of the carrier in the horizontal furnace; Then transport the carrier to the inclined furnace; heat and roast the two ends of the carrier in the inclined furnace; output the roasted carrier. In the present invention, firstly, the peripheral wall of the carrier is fired in a horizontal furnace, and then both ends of the carrier are fired, thereby ensuring that the coating on the entire carrier is more evenly fired, thereby improving the performance of the catalyst.

Description

technical field [0001] The invention relates to the field of automobile tail gas purification, in particular to a roasting method of a three-way catalyst for automobile tail gas. Background technique [0002] The existing catalyst consists of a honeycomb ceramic or metal carrier and a catalyst coating attached to the carrier. The catalyst coating is usually composed of an oxide material with a large specific surface area (such as alumina), an oxygen storage material, and a noble metal active component (usually Pt (platinum), Pd (palladium) dispersed on the surface of the oxide or oxygen storage material. , Rh (rhodium) in one or more) composition. The oxygen storage material is generally a composite oxide containing cerium and zirconium, which adjusts the ratio of oxidizing components and reducing components in the tail gas by absorbing and storing oxygen in the tail gas or releasing oxygen, so that carbon monoxide and hydrocarbon oxygen While being oxidized, nitrogen oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/08B01J23/63B01D53/86B01D53/56B01D53/62B01D53/72
CPCB01D53/8628B01D53/864B01J23/63B01J37/082B01J2523/00B01J2523/3712B01J2523/48B01J2523/31B01J2523/822B01J2523/824B01J2523/828
Inventor 钟静琴钟静清韦晗陶佳
Owner 柳州新开超华科技有限公司
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