Sulfureous resistant four-effect catalyst for purifying tail gas of vehicle

A technology of automobile exhaust and catalyst, applied in the field of automobile exhaust purification, can solve the problems of difficult desorption, sulfur poisoning, strong adsorption capacity, etc., and achieve the effect of large geometric surface area, reduced volume and high mechanical strength
CN101269335BInactive Publication Date: 2011-08-17JILIN UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2011-08-17
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The present invention relates to an anti-sulfur four-way catalyst which is provided with optimal performance and used for purifying automobile exhaust. First, a glass coating solution is prepared, then a metal alloy carrier is repeatedly immerged into the glass coating solution for coating, drying, calcinating so as to get the glass coating on the carrier, then the glass coating is repeatedly immerged into a mixed solution composed of titanium and zirconium salts and into a precious metal catalyst solution; after being baked and calcinated, the anti-sulfur four-way catalyst which is provided with optimal performance and used for purifying automobile exhaust and takes the alloy metal as a carrier is obtained. The four-way catalyst of the present invention has the following advantages that: (1) PM and NOxare catalyzed on the same catalytic bed; (2) the catalytic efficiency is not affected if the concentration of SO2 ranges from 500 to 800ppm; (3) compared with other catalysts, the catalyst has high anti-sulfur performance and takes metal as the carrier. Besides, the catalyst can ensure an engine meeting the emission of European III in a laboratory, a bench experimental testing and application to meet the requirements for emission standards above European IV.
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Description

Technical field

[0001] The invention belongs to the field of exhaust gas purification of automobiles (including diesel vehicles and gasoline automobiles), and particularly relates to an anti-sulfur four-way catalyst with optimized performance for purifying automobile exhaust. technical background

[0002] The development of the automobile industry has brought convenience to human transportation, but it also brought serious air pollution. The exhaust gas emitted by automobiles mainly contains PM, NOx, CO, and HC, which can cause acid rain and urban photochemical smog, affect the ecological environment, and endanger human health. In order to solve this problem, the installation of catalytic converters for exhaust gas is an off-machine purification method commonly used in various countries. The catalyst is the core part of the catalytic converter. It must meet the requirements of high conversion rate, good heat resistance, long service life and good anti-toxicity. The development ...

Claims

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