Catalytic converter for treating exhaust gas of motorcycle and preparation method of catalytic converter

A catalytic converter and tail gas treatment technology, which is applied in the direction of chemical instruments and methods, separation methods, mechanical equipment, etc., can solve the problems of low control accuracy, affecting the activity and durability of catalytic converters, etc., and achieve improved conversion rate and synergistic Strong catalytic effect and good durability

Active Publication Date: 2014-08-27
SINOCAT ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Catalytic converter for treating exhaust gas of motorcycle and preparation method of catalytic converter
  • Catalytic converter for treating exhaust gas of motorcycle and preparation method of catalytic converter
  • Catalytic converter for treating exhaust gas of motorcycle and preparation method of catalytic converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of powder

[0031]①Impregnate 16.03g of palladium nitrate on 97.5g of oxygen storage material. The specific method is to pour 16.03g of palladium nitrate into a 2L plastic cup, then add water to the plastic cup until the solution is 200g, stir for 10min, and then add oxygen storage 97.5g of material, stirred for 1 hour, put the stirred powder into an oven for drying, the drying temperature is 90°C, and the drying time is 6h, put the dried powder into a muffle furnace for roasting, the roasting temperature is 550°C, Roasting time is 2h; Make powder D1, the weight percent content of palladium in D1 is 2.5%;

[0032] 2. palladium nitrate 16.03g is impregnated on the 97.5g aluminum oxide material, makes powder D2, and the weight percent content of palladium in D2 is 2.5%;

[0033] ③ 0.69g of platinum nitrate was impregnated on 99.8g of oxygen storage material to make powder P1, and the weight percent content of platinum in P1 was 0.22%;

[0034] 4. Rhodium...

Embodiment 2

[0045] (1) 60.23g of osmium nitrate is impregnated on 66.92g of oxygen storage material to make powder D1; 60.23g of osmium nitrate is impregnated on 66.92g of alumina material to make powder D2; 21.34g of iridium nitrate is impregnated in On 97.09g of oxygen storage material, make powder P1; impregnate 25.67g of ruthenium nitrate on 97.09g of oxygen storage material, make powder H1; impregnate 46.13g of cobalt nitrate on 89.69g of oxygen storage material, make powder Material T1; 52.08 g of ferric nitrate was impregnated on 89.69 g of alumina material to make powder T2.

[0046] The above-mentioned oxygen storage material is cerium-zirconium solid solution.

[0047] (2) Prepare the metal carrier, the carrier specification is: mesh number 300cell / in 2 , the wall thickness is 1.0mm, the outer diameter is Ф45mm, the length of the metal carrier is 120mm, and the length ratio of A1 section, A2 section and A3 section is 0.5:0.5:1.

[0048] (3) Get 57gT1, 40gT2, 3g aluminum oxide,...

Embodiment 3

[0054] (1) 8.85g palladium nitrate is impregnated on 98.62g oxygen storage material, makes powder material D1; Palladium nitrate 8.85g is impregnated on 98.62g alumina material, is made powder material D2; Platinum nitrate 0.38g is impregnated in On 99.9g of oxygen storage material, make powder P1; impregnate 1.88g of ferric nitrate on 99.95g of oxygen storage material, make powder T1; impregnate 2.13g of nickel nitrate on 99.95g of alumina material, make powder Material T2.

[0055] The above-mentioned oxygen storage material is cerium-zirconium solid solution.

[0056] (2) Prepare the metal carrier, the carrier specifications are: mesh number 300cell / in2, wall thickness 1.0mm, outer diameter Ф45mm, metal carrier length 70mm, and the length ratio of A1, A2 and A3 sections is 5:0:1.

[0057] (3) Get 57gT1, 40gT2, 3g aluminum oxide, 3g acetic acid and 100g pure water and mix, and ball mill to make slurry J1, the solid content of J1 is 50%;

[0058] (4) Get 20gD1, 11.64gD2, 65...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28B01D53/94
Inventor 吴冬冬王金凤李云崔李强
Owner SINOCAT ENVIRONMENTAL TECH
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