重庆市主要工业源VOCs组分排放清单及其臭氧生成潜势

Speciated Emission Inventory of VOCs from Industrial Sources and Their Ozone Formation Potential in Chongqing

基于“第二次全国污染源普查”基础信息和工业行业VOCs源成分谱,建立了重庆市2017年主要工业源VOCs组分清单,并估算其臭氧生成潜势(OFP),识别工业源VOCs重点管控物种及其来源.结果表明,重庆市2017年工业源VOCs排放总量及其OFP分别为144.12 kt和477.34 kt,汽车制造、装备制造、塑料制造和化学原料与化学制品行业的VOCs排放量及其OFP贡献较大,VOCs排放量分别为37.18、33.09、19.47和18.14 kt,OFP分别为191.43、153.69、27.21和57.51 kt.芳香烃是VOCs排放量和OFP贡献最大的组分,分别占VOCs排放总量和总OFP的62.55%和82.15%,其主要来源于金属表面涂装和石油化工业.工业源VOCs中主要的活性物种为间/对-二甲苯、甲苯、乙苯、邻-二甲苯和丙烯,OFP分别为130.47、103.37、46.37、42.83和28.26 kt,累积占总OFP高达71.11%.从空间分布来看,全市各区县VOCs排放强度与O_(3)污染程度较为一致;VOCs排放量和OFP高值点均主要分布在主城区和渝西片区,主城区和渝西片区的VOCs排放来源分别以金属表面涂装和石油化工业为主.

Based on the basic information of the Second National Pollution Source Census and the VOCs source profiles of industrial industries,we established the speciated emission inventory of major industrial sources in Chongqing in 2017,estimated their ozone formation potential(OFP),and identified the key control species of industrial VOCs and their sources.The results showed that the total VOCs emission from industrial sources and their OFPs were 144.12 kt and 477.34 kt,respectively.Automobile manufacturing,equipment manufacturing,plastic manufacturing,and chemical raw materials and chemical products were all industries that contributed significantly to VOCs emissions and OFP,with VOCs emissions of 37.18,33.09,19.47,and 18.14 kt and OFP of 191.43,153.69,27.21,and 57.51 kt,respectively.Aromatics were the components with the largest contribution to VOCs emissions and OFP,accounting for 62.55%of the total VOCs emissions and 82.15%of the total OFP,mainly from metal surface coating and petrochemical industries.The major reactive species of industrial source VOCs were m/p-xylene,toluene,ethylbenzene,o-xylene,and propylene,with OFP of 130.47,103.37,46.37,42.83,and 28.26 kt,respectively,cumulatively accounting for 71.11%of the total OFP.In terms of spatial distribution,the emission intensity of VOCs and O_(3) pollution degree in all districts and counties of Chongqing were relatively consistent;the high value points of VOCs emissions and OFP were mainly distributed in the main urban area and the western area,and the sources of VOCs emission in the main urban area and western area were mainly in metal surface coating and the petrochemical industry,respectively.