Oxidation catalyst for soot particles of diesel and preparation method thereof

A soot particle and catalyst technology, which is applied in the field of oxidation catalyst and its preparation, can solve the problems of affecting oxygen storage capacity, specific surface pore volume deterioration and collapse, and poor high temperature stability, so as to improve dispersion and achieve coating uniformity , no plugging effect
CN109201052AInactive Publication Date: 2019-01-15SINOCAT ENVIRONMENTAL TECH
3 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SINOCAT ENVIRONMENTAL TECH
Publication Date
2019-01-15
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an oxidation catalyst for soot particles of a diesel and a preparation method thereof. The oxidation catalyst is prepared from a coating material and an active component impregnated on the coating material. The active component is prepared from a noble metal salt containing Pt and Pd. The total content of noble metals in the catalyst is 0.5 to 3 g / ft3, and a weight ratio ofthe noble metal Pt and the noble metal Pd is 2:1 to 10:1. The coating material is a high-cerium-content composite metal oxide, wherein the content of cerium oxide is greater than or equal to 80% by weight. The preparation method comprises the following steps: directly mixing the coating material and the noble metal salt solution of the active component; performing stirring and ball milling, and controlling and adjusting a pH value to 1.5 to 5.5, a particle diameter D50 to 2 to 7 [mu]m and a solid content to no more than 20%; and coating a carrier with a mixture obtained in the previous step and then performing calcinations so as to obtain the catalyst. The carrier slurry of the catalyst in the invention is uniform in distribution and free of the phenomenon of plugging; and the catalyst has low back pressure and high oxygen storage capacity in a practical exhaust gas purification and treatment system, and can achieve the purpose of rapidly oxidizing PM at a low temperature.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of catalyst research and preparation, in particular to the technical field of motor vehicle exhaust treatment catalyst research and preparation, and in particular to an oxidized catalyst with good low-temperature catalytic oxidation of diesel soot particles (PM) and its preparation technology. Background technique

[0002] Diesel engines have high thermal efficiency, and after the fuel is oxidized at high temperature in the cylinder, a large amount of heat is released. However, due to the lack of oxygen in the layout or high temperature, part of the fuel is degraded and dehydrogenated to form small solid particles mainly composed of carbon, that is, PM; Insufficient, together with the oil, the soluble organic matter is fused to produce a large amount of soot particles, that is, SOF; in addition, there are some inorganic substances such as sulfate particles, which are mixed together to form a large amount of b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More