河南省优先控制人为源VOCs关键物种及源的识别
Identification of Key Anthropogenic VOCs and Their Sources in Henan Province
-
摘要: 为了解河南省人为源挥发性有机物(VOCs)排放特征、识别以臭氧(O3)污染治理为目的的关键VOCs物种及其排放源,以5大类人为源的活动水平数据为基础,采用排放因子法建立了2019年河南省县级人为源VOCs组分化排放清单,并利用最大增量反应活性(MIR)估算其臭氧生成潜势(OFP),基于OFP识别O3污染治理的关键VOCs物种及其排放源。结果表明:①河南省2019年人为源VOCs排放总量为175.62×104 t,其中工艺过程源、移动源、生物质燃烧源、溶剂使用源和化石燃料燃烧源对VOCs排放总量的贡献依次为28.6%、25.2%、20.8%、19.1%和6.3%。②空间分布显示,以郑州市为中心的豫北排放量远高于豫南,呈“一高三低”的空间分布特点,郑州市排放量最高,其排放量为27.7×104 t,漯河、三门峡和鹤壁市排放量最低,其排放量均小于5.0×104 t。③芳香烃是排放量最高的化学组分,其排放量为47.5×104 t,其次为烷烃(46.3×104 t)、OVOCs(40.3×104 t)和烯烃(20.9×104 t),其中甲苯、乙烯、苯等排放量高的10个物种占排放总量的42.0%。④河南省人为源VOCs的总OFP为664.0×104 t,其中,芳香烃和烯烃对OFP的贡献最大,各占总OFP的32%,其次OVOCs的OFP占28.0%;乙烯、间/对-二甲苯、甲苯、丙烯和甲醛等对总OFP的贡献率为67.2%,其主要来源是生物质燃烧、小型客车、建筑涂装、汽车涂装、化学合成、涂料制造、建筑和农业机械等,因这些物种和排放源是河南省臭氧污染治理的关键。研究显示,本研究的OFP空间分布与国控点O3浓度和PM2.5-O3大气复合污染空间分布规律高度一致。Abstract: Aiming to understand the emission characteristics of VOCs from anthropogenic sources in Henan Province, and to identify key VOCs species and their emission sources for the purpose of O3 pollution control, a county-level anthropogenic speciated VOCs emission inventory was established for 2019 by emission factor methods. Furthermore, the ozone formation potentials (OFP) of VOCs were estimated by Maximum Incremental Reactivity (MIR), and the key species and emission sources were identified based on OFPs. Results showed that: ①Total anthropogenic VOCs emissions in Henan Province in 2019 were 175.62 × 104 t, of which industrial sources, mobile sources, biomass combustion sources, solvent utilization sources, and fossil fuel combustion sources contributed 28.6%, 25.2%, 20.8%, 19.1%, and 6.3% to the total VOCs emissions, respectively. ②The spatial distribution shows that the emissions from northern Henan are much higher than those from southern Henan, and the spatial distribution of municipal emissions is characterized by "one high and three low", with the highest emissions being from Zhengzhou city with 27.6×104 t, and the lowest emissions from Luohe, Sanmenxia and Hebi city with less than 5.0×104 t. 104 t. ③Aromatic hydrocarbons are the highest emitted chemical component with 47.5×104 t, followed by alkanes (46.3×104 t), OVOCs (40.3×104 t), and alkenes (20.9×104 t), of which 10 species with high emissions such as toluene, ethylene, and benzene account for 42.0% of the total emissions. ④The total OFP of anthropogenic VOCs in Henan Province was 664.0×104 t, with aromatic hydrocarbons and alkenes contributing the most to the OFP, each accounting for 32% of the total OFP, followed by OVOCs (28.0%); Ethylene, m/p-xylene, toluene, propylene, and formaldehyde contribute 67.2% to the total OFP, and their mainly originated from biomass combustion, passenger cars, architectural painting, car painting, chemical synthesis, paint manufacturing, construction and agricultural machinery, as these species and emission sources are the key to ozone pollution management in Henan. The spatial distribution of OFP in this study is basically consistent with the spatial distribution of O3 concentration and PM2.5-O3 air compound pollution which is derived from the National Air Quality Monitoring Station.
-
Key words:
- Anthropogenic VOCs /
- Speciated emission inventory /
- OFP /
- Key species and sources
点击查看大图
计量
- 文章访问数: 125
- HTML全文浏览量: 15
- PDF下载量: 28
- 被引次数: 0