Preparation method of a light-duty diesel vehicle oxidation particulate filter

A technology for particle traps and diesel vehicles, applied in the field of traps, can solve problems such as poor capture efficiency and fast aging, and achieve the effects of optimized components, good dispersion, and enhanced low-temperature processing capabilities
CN106823592BActive Publication Date: 2019-07-05SICHUAN MIANYANG HUAYUANHANGSHENG ENVIRONMENTAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN MIANYANG HUAYUANHANGSHENG ENVIRONMENTAL TECH
Publication Date
2019-07-05

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Abstract

The invention discloses a preparation method of an oxidized particulate filter for light diesel vehicles. The preparation method includes the steps of adding water into filtering materials and mixing the filtering materials in water with a precursor solution of precious metal; regulating a pH value of mixed slurry to keep alkalescency thereof so as to obtain ion-exchanged active slurry; filtering the active slurry prior to drying and primary roasting in sequence; cooling and grinding catalyst powder to obtain catalyst slurry and applying the catalyst slurry to a carrier to conduct secondary roasting. The preparation method of the oxidized particulate filter for the light diesel vehicles has the advantages that according to the preparation method, the catalyst slurry is applied to the carrier, and the oxidized particulate filter is generated through roasting; both particulate sizes of the catalyst slurry and components of the catalyst are optimized, so that the filter obtained by the preparation method can filter small particulates without backpressure increasing, filtering efficiency of the filter can be improved, low-temperature PM treatment capability of the filter at a cold start stage is enhanced, and the problem that small particulates of exhaust gas fail to be filtered is solved.
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Description

technical field

[0001] The invention relates to the technical field of traps, in particular to a preparation method of an oxidized particle trap for a light-duty diesel vehicle. Background technique

[0002] At present, about 60% of the urban air pollution in my country is mainly caused by motor vehicle pollution. The soot and particulates (PM) in diesel vehicles, including some toxic polycyclic aromatic hydrocarbons, are serious emission problems and have become the bottleneck factor in the control of air pollution. Along with the increase in the number of diesel engines, rising oil prices and stricter European emission regulations, people are paying more and more attention to the impact of their exhaust gas on air quality. How to effectively control the harmful gas emissions from diesel engines has always been a common concern.

[0003] Various types of engines, such as gasoline engines, diesel engines, and other fuel gas internal combustion engines, include gas pollutan...

Claims

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