Catalytic converter for motorcycle exhaust treatment and preparation method thereof

Abstract

The invention discloses a catalytic converter for treating exhaust gas of a motorcycle. The catalytic converter comprises a metal carrier, and a catalyst coating that is coated on the surface of the metal barrier, wherein the metal barrier consists of a housing and a core body; the metal barrier specifically comprises an A1 section, an A2 section and an A3 section, wherein the A1 section is positioned at an air feeding section, the A3 section is positioned at an air discharging section, and the A2 section is positioned between the A1 section and the A3 section; the length ratio of the A1 section to the A2 section to the A3 section is 0.5-5: 0-0.5: 1; an iron-based catalyst coating is coated on the outer surface of the A1 section; a noble metal catalyst coating is coated on the outer surface of the A3 section; no core body is arranged at the A3 section. According to the catalytic converter for treating the exhaust gas of the motorcycle, the coating length of each of the iron-based catalyst coating and the noble metal catalyst coating and the content of effective ingredients of catalysts, in percentage by weight, in the corresponding catalyst coatings can be controlled to convert the excessive air coefficient components in the motorcycle exhaust gas subjected to the treatment of the iron-based catalyst coating from 0.93-1.03 into 0.91-1.03, thus the exhaust gas treatment capacity of the noble metal catalyst coating is improved, and as a result, the activity and durability of the catalytic converter are improved.

Description

technical field [0001] The invention relates to a catalytic converter, in particular to a catalytic converter for motorcycle tail gas treatment and a preparation method thereof. Background technique [0002] National motorcycle exhaust emission regulations are becoming more and more stringent, which makes improving exhaust gas post-treatment technology the focus of attention of people in the same industry. At present, the main technical direction is to jointly treat pollutants (such as carbon monoxide, nitrogen oxides, hydrocarbons, etc.) in motorcycle exhaust gas by optimizing the performance of the engine and using catalytic converters to meet the national restrictions on pollutant emissions. [0003] With people's continuous pursuit of the cost performance of motorcycles, higher requirements are put forward for the cost performance of catalytic converters. People hope to use cheaper catalytic converters to meet the national emission limit requirements. Among them, the i...

AI Technical Summary

Problems solved by technology

[0004] At present, the fuel injection technology of motorcycles is mainly controlled by mechanical means, that is, carburetor, and its control accuracy is low, resulting in the excess air coefficient component of motorcycle exhaust being 0.93-1.03, which is suitable for the work of precious metal catalysts. The composition is 0.97~1.03

Placing iron-based catalysts and noble metal catalysts on the same coating or placing iron-based catalysts and noble metal catalysts on different coatings on the same section of the catalytic converter will affect the catalytic conversion due to the fact that the reaction atmosphere on the surface of the noble metal catalysts cannot reach the optimum condition. Device activity and durability

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