Three time-coated motorcycle catalyst and a preparation method thereof

A motorcycle and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as the inability to meet the HC catalytic capacity, and achieve the effect of improving conversion efficiency

Inactive Publication Date: 2019-07-09
WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, HC emissions mainly appear in the cold start stage, and the existing National IV catalysts can no longer meet the catalytic capacity for HC

Method used

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  • Three time-coated motorcycle catalyst and a preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0027] A triple-coated motorcycle catalyst, including a honeycomb metal carrier, the size of the honeycomb metal carrier is φ48.6*130*120, the pore density is: 300CPSI, and the volume is 0.205L; at the inlet end of the metal carrier The first precious metal coating is coated on the top, the coating amount of the first noble metal coating is 100g / L, and the usage amount of Pd is 50g / ft 3 ; Coating the second precious metal coating on the gas outlet end of the metal carrier, the coating amount of the second noble metal coating is 100g / L, and the usage amount of Pd is 20g / ft 3 , the coating height of the first noble metal coating and the second noble metal coating is 1:1; the third noble metal coating is coated on the second noble metal coating, and the coating amount of the third noble metal coating is 40g / L, The amount of Rh used is 5g / ft 3 .

[0028] The preparation method of the three-time coating catalyst of the motorcycle adopts the following process steps:

[0029] (1) ...

Embodiment 2

[0033]A triple-coated motorcycle catalyst, including a honeycomb metal carrier, the size of the honeycomb metal carrier is φ48.6*130*120, the pore density is: 300CPSI, and the volume is 0.205L; on the inlet end of the metal carrier Apply the first noble metal coating, the coating amount of the first noble metal coating is 100g / L, and the usage amount of Pt is 10g / ft 3 , the amount of Pd used is 40g / ft 3 ; Coating the second precious metal coating on the gas outlet end of the metal carrier, the coating amount of the second noble metal coating is 100g / L, and the usage amount of Pd is 20g / ft 3 , the coating height of the first noble metal coating and the second noble metal coating is 1:1; the third noble metal coating is coated on the second noble metal coating, and the coating amount of the third noble metal coating is 40g / L, The amount of Rh used is 5g / ft 3 .

[0034] The preparation method of the three-time coating catalyst of the motorcycle adopts the following process ste...

Embodiment 3

[0039] A three-time coated motorcycle catalyst, including a honeycomb metal carrier, the size of the honeycomb metal carrier is φ48.6*130*120, the pore density is: 300CPSI, and the volume is 0.205L; it is coated on the inlet end of the metal carrier The first noble metal coating, the coating amount of the first noble metal coating is 100g / L, and the usage amount of Pt is 5g / ft 3 , the amount of Pd used is 40g / ft 3 , the dosage of Rh is 5g / ft 3 ; Coating the second noble metal coating on the gas outlet of the metal carrier, the coating amount of the second noble metal coating is 100g / L, and the usage amount of Pd is 20g / ft 3 , the coating height of the first noble metal coating and the second noble metal coating is 1:1; the third noble metal coating is coated on the second noble metal coating, and the coating amount of the third noble metal coating is 40g / L, The amount of Rh used is 5g / ft 3 .

[0040] The preparation method of the three-time coating catalyst of the motorcyc...

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Abstract

The invention relates to a three time-coated motorcycle catalyst and a preparation method thereof. A first noble metal coating is coated on the gas inlet end of a honeycomb carrier, a second noble metal coating is coated on the gas outlet end of the honeycomb carrier, and a third noble metal coating is coated on the outer surface of the second noble metal coating, wherein the first noble metal coating is composed of noble metal and alumina loading the noble metal, and the noble metal is one of Pd, Pt-Pd, Pd-Rh or Pt-Pd-Rh; the second noble metal coating comprises noble metal, noble metal-loaded alumina and an oxygen storage material, and the noble metal is one of Pd and Pt-Pd; and the third noble metal coating comprises noble metal Rh, noble metal-loaded alumina and an oxygen storage material, and the noble metal is Rh. The preparation method of the catalyst comprises the following steps: preparing the first noble metal coating, preparing the second noble metal coating, and preparing the third noble metal coating. Through the catalyst, the conversion efficiency of HC at the cold start stage is improved, and meanwhile the conversion rate of CO and NOx is taken into account, so thatthe Euro 5 emission limits of pollutants are met.

Description

technical field [0001] The invention discloses a three-times-coated motorcycle catalyst, and also discloses a preparation method of the three-times-coated motorcycle catalyst, which belongs to the technical field of catalyst preparation. Background technique [0002] The main pollutants of motorcycle exhaust are hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NO x ), the catalyst installed in the motorcycle exhaust system can oxidize hydrocarbons, carbon monoxide to carbon dioxide (CO 2 ) and water (H 2 O), and can reduce nitrogen oxides to nitrogen (N2) at the same time, so as to realize the simultaneous purification of the three main pollutants in the exhaust gas. The catalyst usually consists of two parts: a honeycomb metal or ceramic carrier, and a catalyst coating attached to the carrier. Catalyst coatings usually have inorganic oxide materials with relatively large specific surface areas (such as alumina and oxygen storage materials) and noble metal act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01D53/94B01D53/62B01D53/56B01D53/72
CPCB01D53/94B01D53/945B01D2255/1021B01D2255/1023B01D2255/2061B01D2255/2063B01D2255/2066B01D2255/2068B01D2255/2092B01D2257/404B01D2257/502B01D2257/702B01J23/63
Inventor 浦琦伟于鹏飞孙亮王卫东刘杰韩田朋李小明谢鼎峰王德冰潘其建岳军贾莉伟徐岘陈颖王家明
Owner WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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