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A kind of gasoline vehicle particulate trap catalyst and preparation method thereof

A particle capture and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve the problem of incomplete catalyst treatment, to ensure high temperature aging resistance and improve the ability , The effect of simple preparation method

Active Publication Date: 2019-04-23
WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of incomplete treatment of existing catalysts with the increase of particulate pollutants in automobile exhaust, and to provide a particle trapping catalyst for gasoline vehicles and a preparation method thereof. The preparation method is simple, and the prepared catalyst has high Excellent catalytic activity, high temperature aging resistance and ability to deal with nitrogen oxides (NOx)

Method used

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  • A kind of gasoline vehicle particulate trap catalyst and preparation method thereof
  • A kind of gasoline vehicle particulate trap catalyst and preparation method thereof
  • A kind of gasoline vehicle particulate trap catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 2

[0033] A particle trapping catalyst for gasoline vehicles, using a wall-flow honeycomb carrier with a specification of Ф118.4mm×119mm, a pore density of 300cpsi, a pore wall thickness of 12mil, a porosity of 65%, an average pore diameter of 20um, and a volume of 1.31L; One end of the first coating is coated with the first coating, the coating height of the first coating is 50% of the height of the carrier, the coating amount is 60g / L, and the loading amount of Rh in the first coating is 3g / ft 3 .

[0034] Coat the other end of the carrier with a second coating, the coating height in the second coating is 50% of the height of the carrier, the coating amount is 60g / L, and the loading amount of noble metal Pd in ​​the second coating is 16g / ft 3 , the loading of precious metal Rh is 1g / ft 3 .

[0035] The preparation method is as follows:

[0036]Add 1500g of cerium-zirconium composite oxide and activated alumina to 6000g of deionized water in turn to prepare a suspension, wher...

Embodiment 3

[0040] A particle trapping catalyst for gasoline vehicles, using a wall-flow honeycomb carrier with a specification of Ф118.4mm×119mm, a pore density of 300cpsi, a pore wall thickness of 12mil, a porosity of 65%, an average pore diameter of 20um, and a volume of 1.31L; One end is first coated with the first coating, the coating height of the first coating is 100% of the height of the carrier, the coating amount is 60g / L, and the loading amount of precious metal Rh in the first coating is 3g / ft 3 .

[0041] Coat the other end of the carrier with a second coating, the coating height of the second coating is 100%, the coating amount is 60g / L, and the loading amount of noble metal Pd in ​​the second coating is 16g / ft 3 , the loading of precious metal Rh is 1g / ft 3 .

[0042] The preparation method is as follows:

[0043] Add 1500g of cerium-zirconium composite oxide and activated alumina to 6000g of deionized water in turn to prepare a suspension, wherein the mass ratio of ceri...

Embodiment 4

[0047] A particle trapping catalyst for gasoline vehicles, using a wall-flow honeycomb carrier with a specification of Ф118.4mm×119mm, a pore density of 300cpsi, a pore wall thickness of 12mil, a porosity of 65%, an average pore diameter of 20um, and a volume of 1.31L; One end of the first coating is coated with the first coating, the coating height of the first coating is 100% of the height of the carrier, the coating amount is 80g / L, and the loading amount of the precious metal Rh in the first coating is 3.6g / ft 3 .

[0048] Coat the other end of the carrier with a second coating, the coating height of the second coating is 100% of the height of the carrier, the coating amount is 80g / L, and the loading amount of noble metal Pd in ​​the second coating is 16g / ft 3 , the loading of precious metal Rh is 0.4g / ft 3 .

[0049] The preparation method is as follows:

[0050] Add 1500g of cerium-zirconium composite oxide and activated alumina to 6000g of deionized water in turn to ...

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Abstract

The invention relates to a gasoline vehicle particle capture catalyst and a preparation method thereof. The inner skeleton of the air inlet end of the carrier is coated with a first coating, and the inner frame of the air outlet end of the carrier is coated with a second coating. The height of the coating and the second coating is 50~100% of the height of the carrier. The coating amount of the first coating and the second coating is both 10~90g / L. The first coating is loaded with a precious metal Rh loading. is 0.75~9.1g / ft 3 , the second coating is loaded with precious metals Pd and Rh, and the loading amount of precious metal Rh is 0.09~2.5g / ft 3 , Pd loading capacity is 5~50g / ft 3 . The preparation method of the invention is simple, and the prepared catalyst has a good reduction in the number of particulate matter (PN), and a single Rh coating is placed on the air inlet end to avoid the generation of palladium-rhodium alloy, and at the same time, it is introduced into the Pd coating on the air outlet end. A small amount of precious metal Rh can improve the oxygen storage capacity of the coating, while also ensuring the high activity and high temperature aging resistance of the catalyst, and improving the catalyst's ability to handle nitrogen oxides (NOx).

Description

technical field [0001] The invention relates to a gasoline vehicle particle trapping catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique [0002] Relevant data show that motor vehicle exhaust accounts for 22.2% of Beijing smog particles, and motor vehicle exhaust is the most important component of smog particles. The pollutants in automobile exhaust are mainly composed of carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons (HC) and particulate matter, among which the particulate matter emitted by motor vehicles is one of the main culprits of PM2.5, which are harmful to the environment It poses a great threat to human health. Installing a particle trapping catalyst near the three-way catalyst of the car can effectively convert carbon monoxide (CO), nitrogen oxides (NOx), and hydrocarbons (HC) into harmful components. Carbon dioxide (CO2), nitrogen (N2), water (H2O) and reduced particle number (PN). ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63B01J35/04B01D53/94B01D53/56B01D53/62B01D53/72
CPCB01D53/945B01J23/002B01J23/63B01D2258/01B01J2523/00B01J35/56B01J2523/31B01J2523/3706B01J2523/3712B01J2523/3718B01J2523/48B01J2523/822B01J2523/824
Inventor 赵德鹏岳军金炜阳王卫东李晓坤韩婷婷郝世杰韩天朋贾莉伟
Owner WUXI WEIFU ENVIRONMENT PROTECTION CATALYST