A kind of purification treatment method of diesel engine exhaust

A diesel engine and exhaust gas treatment technology, which is applied in the purification treatment of nitrogen monoxide and sulfur dioxide, and in the field of particulate matter in exhaust gas, can solve the problems of unsatisfactory effect, high price, and lack of resources, so as to improve the efficiency of catalytic reaction, low cost, and avoid The effect of catalyst poisoning
CN111408379BActive Publication Date: 2021-11-02WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2021-11-02

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Abstract

The invention relates to a method for purifying and treating exhaust gas of a diesel engine. Provide exhaust gas treatment catalysts, including zinc oxide honeycomb ceramic carrier and catalyst loaded on the carrier, wherein the zinc oxide honeycomb ceramic carrier is a microwave-absorbing and exothermic zinc oxide honeycomb ceramic material, which can trap and adsorb particulate matter in diesel engine exhaust, and in Under the action of microwave heating, the particles adsorbed on the ceramic surface are further burned and decomposed. At the same time, it can absorb sulfur dioxide in the exhaust gas of diesel engines, so as to achieve the purpose of desulfurization. In addition, the material supports a lanthanum-cerium-nickel composite metal oxide catalyst, which has a good denitrification effect on the exhaust gas of a diesel engine under a microwave field. The purification treatment method provided based on the above-mentioned carrier and catalyst can effectively improve the reaction efficiency of the catalyst, avoid catalyst poisoning and prolong its service life, and has broad application prospects in the field of purification of diesel engine exhaust.
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Description

technical field

[0001] The invention relates to the field of purification treatment of diesel engine tail gas, in particular to a purification treatment method for particulate matter, nitrogen monoxide and sulfur dioxide in the tail gas. Background technique

[0002] Diesel engines have good fuel economy and are widely used in the automotive and marine industries. However, due to the low combustion temperature of the diesel engine, the exhaust gas contains many harmful substances, such as carbon monoxide (CO), nitrogen oxides (NO x ), hydrocarbons (CH), sulfur dioxide (SO 2 ) and particulate matter (PM), etc., will cause problems such as acid rain and smog in the atmospheric environment, seriously affecting people's health.

[0003] At present, the commonly used exhaust after-treatment technologies for diesel engines mainly include diesel oxidation catalyst technology (DOC), diesel particulate filter (DPF), selective catalytic reduction technology (SCR) and four-way cataly...

Claims

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