机动车尾气VOCs排放特征及减排措施研究

分析了机动车尾气挥发性有机物(VOCs)的排放特征,发现尾气VOCs排放具有明显的日变化和季节变化特征。不同区域不同车型机动车尾气VOCs成分谱略有差异,轻型汽油车尾气VOCs中芳香烃和烷烃含量较高,柴油车烷烃含量较高。尾气排放受机动车保有量、行驶里程、维护保养水平、行驶速度和燃油标准、排放标准等因素影响。从优先控制汽油车、加快机动车更新、采取本地化减排措施、加强多元管理措施、提高科研水平等方面提出了针对性的减排措施。

Characteristics and Reduction Measures of Volatile Organic Compounds in Vehicle Exhaust

In this paper,the emission characteristics of volatile organic compounds(VOCs)in vehicle exhausts were analyzed,and it was found that exhaust VOCs emissions had obvious diurnal and seasonal variations.There were slight differences in VOCs source profiles of different vehicles in different regions,among which aromatic hydrocarbons and alkanes were the main components of light-duty gasoline vehicles,while the alkanes in the diesel vehicle exhaust were higher.Exhaust emission was affected by the number of vehicles,driving mileage,maintenance level,driving speed,fuel standards and emission standards.This paper puts forward the targeted emission reduction measures from different aspects,such as prioritizing the control of gasoline vehicles,accelerating motor vehicle renewal,adopting localized emission reduction measures,strengthening diversified management measures and improving scientific research.