Diesel vehicle exhaust oxidation catalyst(DOC)is an important part of diesel vehicle emission post-treatment system.Its main function is to effectively remove carbon monoxide(CO)and hydrocarbons(HC)caused by incomplete combustion,and oxidize a portion of nitric oxide(NO)to nitrogen dioxide(NO2),which promotes the subsequent regeneration of diesel particulate filters(DPF)and ammonia selective catalytic reduction(NH3-SCR)reactions.However,in practical operation,the DOC,which is located at the forefront of the entire after treatment system for diesel emission,inevitably suffers from sulfides and phosphates in diesel and lubricating oil,which affects the overall purification efficiency of the after treatment system.In this paper,the effects of sulfur and phosphorus on the catalytic performance of DOC,the mechanism of sulfur and phosphorus poisoning,and strategies for mitigating sulfur and phosphorus poisoning were reviewed in detail.In view of gap between scientific research and practical applications of DOC for sulfur and phosphorus poisoning,the development direction of DOC for sulfur and phosphorus poisoning in the future was prospected.
关键词
柴油车/尾气氧化催化剂/硫磷中毒/中毒机制/缓解中毒策略
Key words
diesel vehicle/exhaust oxidation catalyst/sulfur-phosphorus complex poisoning/mechanism of poisoning/strategy for mitigating poisoning
维普
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