柴油车尾气中NO_(x)净化研究进展

Research Progress on NO_(x)Purification in Diesel Vehicle Exhaust

柴油车尾气中氮氧化物的污染已经成为我国大气污染的主要因素之一,受到广泛关注。综述了现有柴油车尾气NO_(x)净化技术,目前柴油车尾气后处理技术主要有选择性催化还原技术、NO_(x)储存-催化还原技术、低温等离子技术、NO_(x)直接分解技术、NO_(x)和PM同时净化技术等,分析比较了不同净化技术的特点;未来需要进一步研发活性高、选择性强的低成本催化剂,以及配套的尾气净化设备。

The pollution of nitrogen oxides in diesel vehicle exhaust has become one of the main factors of air pollution in China,which has attracted widespread attention.In this paper,the existing diesel exhaust NO_(x)purification technology is reviewed,and the current diesel exhaust aftertreatment technologies mainly include selective catalytic reduction technology,NO_(x)storage-catalytic reduction technology,low-temperature plasma technology,NO_(x)direct decomposition technology NO_(x)and PM simultaneous purification technology,etc.,and analyzes and compares the characteristics of different purification technologies.In the future,it is necessary to further develop low-cost catalysts with high activity and selectivity,as well as supporting exhaust gas purification equipment.