京津冀区域人为源VOCs排放特征及优先控制分级
Emission characteristics and priority classification control of anthropogenic VOCs sources in Beijing-Tianjin-Hebei region
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摘要: 以京津冀区域2018年人为源VOCs排放为研究对象,建立了分行业分物种VOCs排放清单,获取了各排放源臭氧生成潜势(ozone formation potential, OFP)与二次有机气溶胶生成潜势(secondary organic aerosol formation potential, SOAP),构建了VOCs排放源优先控制分级技术方法,计算得到各排放源分级指数。结果表明2018年京津冀区域人为源排放VOCs总计214.0万吨,移动源占比最大,其次为工艺过程源与溶剂使用源。各行业对OFP与SOAP贡献分别为698.2万吨与3.6万吨,其中小型客车、工业防护涂料、重型货车、焦化行业为主要来源;结合各行业VOCs排放量与其对PM2.5和O3浓度影响,计算得到人为源VOCs优先控制分级指数,工业防护涂料、小型客车、重型货车、焦化、钢铁、供暖燃烧、生物质燃烧源指数较高,为了实现PM2.5与O3的科学协同防控,建议加强上述排放源的控制力度。该成果可为京津冀区域下一阶段复合污染防治工作开展提供科技支撑。
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关键词:
- 挥发性有机物 /
- 排放清单 /
- 臭氧生成潜势 /
- 二次有机气溶胶生成潜势 /
- 优先控制分级
Abstract: The anthropogenic VOCs emission sources of Beijing-Tianjin-Hebei (BTH) regions on the base year of 2018 were taken as the research object, the emission inventory containing various industries and species was established, the ozone formation potential (OFP) and secondary organic aerosol formation potential (SOAP) of different VOCs sources were obtained. The VOCs emission source priority control classification technology method was constructed, and the classification index of each emission source was calculated. Results showed that the total emission amount of VOCs from anthropogenic sources in the BTH regions in 2018 was 2.140 million tons, with mobile sources accounting for the largest proportion, followed by industrial process sources and solvent utilization sources. The total OFP and SOAP contributed by these VOCs sources was 6.982 million tons and 36,000 tons in respective, among which small passenger cars, industrial protective coating, heavy trucks and coking were the predominant sources. The VOCs priority control classification index is calculated combining the emission amounts, OFP and SOAP of various VOCs emission sources. The indexes of industrial protective coatings, small passenger cars, heavy trucks, coking, iron/steel, heating combustion, and biomass combustion were obviously larger. In order to achieve the scientific and collaborative prevention and control of PM2.5 and O3, it is suggested to strengthen the control of the above emission sources. The results can provide scientific and technological support for the next stage of combined pollution prevention and control in the BTH regions.
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