| 京津冀移动源VOCs排放特征及臭氧生成潜势 |
| 摘要点击 231 全文点击 28 投稿时间：2024-06-25 修订日期：2024-08-28 |
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| 中文关键词 京津冀 挥发性有机物（VOCs） 移动源 排放清单 臭氧生成潜势（OFP） |
| 英文关键词 Beijing-Tianjin-Hebei Region volatile organic compounds（VOCs） mobile sources emission inventory ozone formation potential （OFP） |
| DOI 10.13227/j.hjkx.20250702 |
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| 中文摘要 |
| 移动源是京津冀人为源挥发性有机物（VOCs）排放的重要贡献源，建立详细的移动源VOCs排放清单，明确臭氧生成潜势（OFP）及其活性物种，有利于精准和科学开展移动源污染防控工作. 基于京津冀区域移动源活动水平数据，结合排放因子法和源成分谱相关研究成果，建立了京津冀2021年移动源分排放源、分组分的VOCs排放清单，识别重点源和组分的排放贡献，并使用最大增量反应活性（MIR）估算移动源VOCs的臭氧生成潜势. 结果表明，2021年京津冀移动源VOCs排放量为21.46万t，北京市、天津市和河北省分别为2.85、2.81和15.80万t. 京津冀移动源VOCs排放以道路移动源为主，占比为93.15%，其中汽油机动车贡献了72.70%的排放量，是最主要的排放源. 非道路移动源中工程机械和农业机械的VOCs年排放量较为突出，占比分别为2.01%和1.99%. 芳香烃、烷烃和烯烃是京津冀移动源VOCs排放较高的组分，而烯烃、芳香烃和OVOCs对OFP贡献较高，贡献率达到91.96%. 乙烯、丙烯、甲苯、甲醛、1，2，3-三甲基苯、1-丁烯、乙醛、1，3-丁二烯、异戊烷和丙醛是京津冀OFP主要的活性物种，对总OFP的贡献为69.49%. 北京市、天津市和河北省三地VOCs排放和OFP的首要贡献源均为汽油机动车，此外北京市的摩托车、柴油机动车和民航飞机、天津市的工程机械和船舶、以及河北省的柴油机动车和农业机械对当地的VOCs排放和OFP贡献也相对较高. |
| 英文摘要 |
| Mobile sources are the primary contributor of volatile organic compounds （VOCs） emissions from anthropogenic sources in the Beijing-Tianjin-Hebei Region. Establishing a detailed VOCs emission inventory and clarifying the ozone generation potential （OFP） and their active species is conducive to scientific control of mobile source pollution. Based on the activity level data of mobile sources in the Beijing-Tianjin-Hebei Region， combined with the emission factor method and related research on source profiles， an emission inventory of VOCs from mobile sources was established to identify the emission contribution of key sources and components. Additionally， the ozone generation potential of VOCs was estimated using the maximum incremental reactivity （MIR）. The results indicated that total VOCs emissions from mobile sources in the Beijing-Tianjin-Hebei Region in 2021 was 214.6 kt， with 28.5 kt from Beijing， 28.1 kt from Tianjin， and 158.0 kt from Hebei Province. The VOCs emissions from mobile sources in the Beijing-Tianjin-Hebei Region were dominated by on-road mobile sources， with a proportion of 93.15%， of which gasoline motor vehicles contributed 72.70% to the emissions. Among non-road mobile sources， construction machinery and agricultural machinery had notable annual VOCs emissions， accounting for 2.01% and 1.99%， respectively. Aromatics， alkanes， and alkenes were the components with the highest VOCs emissions from mobile sources in the region， while alkenes， aromatics， and OVOCs had the highest contributions to OFP， accounting for 91.96%. Ethylene， propylene， toluene， formaldehyde， 1，2，3-trimethylbenzene， 1-butene， acetaldehyde， 1，3-butadiene， isopentane， and propionaldehyde were the major reactive species of OFP in the Beijing-Tianjin-Hebei Region， contributing 69.49% to the total OFP. The top contributing sources of VOCs emissions and OFP in Beijing， Tianjin， and Hebei provinces were all gasoline motor vehicles， in addition to motorcycles， diesel motor vehicles， and civil aviation aircraft in Beijing； construction machinery and ships in Tianjin； and diesel motor vehicles and agricultural machinery in Hebei Province， which also contributed relatively high local VOCs emissions and OFP. |
