郑州市VOCs组分排放清单及其臭氧生成潜势

Emission Inventory of VOCs Components in Zhengzhou and Their Ozone Formation Potential

基于人为源挥发性有机物(VOCs)活动水平统计和源成分谱梳理,采用排放因子法,建立了郑州市2016年VOCs组分排放清单,评估了各类源臭氧生成潜势(OFP).结果表明,2016年郑州市人为源VOCs排放总量为96215.3 t,排放量最高的是道路移动源(29.7%),其次是有机溶剂使用源(28.1%);排放量最高的组分是烷烃(29.8%),其次是芳香烃(29.0%).郑州市人为源VOCs的OFP为341291.0 t,贡献最高的排放源是道路移动源(30.5%),其次是溶剂使用源(28.8%),其中轻型汽油车、内墙涂料使用、机动车表面涂层、加油站装卸油和非金属矿物制造是OFP的主要次级排放源,也是郑州市降低臭氧污染时需重点管控的VOCs排放源.对于VOCs种类而言,贡献较高的是芳香烃(42.8%),其次是烯烃(38.9%),未来应加强对间/对-二甲苯、丙烯和乙烯等物种排放来源的控制.

In this study,according to the activity levels of volatile organic compounds(VOCs)sources and source profiles,a 2016-based inventory of the speciation emission of the VOCs was established and the ozone formation potential(OFP)were estimated in Zhengzhou.The results showed that the total VOCs emission in Zhengzhou in 2016 was 96215.3 t.The highest emission source was on-road mobile source(29.7%)followed by solvent use sources(28.1%).The species that contributed the highest emission was alkanes(29.8%)followed by aromatics(29.0%).The OFP in Zhengzhou in 2016 was 341291.0 t with the highest contributing source as on-road mobile(30.5%)followed by solvent use source(28.8%).Moreover,the light duty gasoline vehicle,use of interior wall coatings,vehicle surface coating,gas station loading and unloading,and manufacture of non-metallic mineral were the major secondary emission sources of OFP,which needed to be controlled for reducing ozone pollution in Zhengzhou.For VOCs species group,the higher contribution groups were aromatics(42.8%)and alkenes(38.9%).The sources that produced m/p-xylene,propylene,ethylene,and other species should be paid more attention.