摘要
加油站油气处理装置是控制埋地油罐油气压力并对油气进行回收处理的装置,测试分析油气处理装置进口和出口挥发性有机物(VOCs)化学组成,利用最大增量反应活性(MIR)和气溶胶生成系数(FAC)估算VOCs的臭氧生成潜势(OFP)和二次有机气溶胶生成潜势(SOAP),量化评估其二次污染生成贡献.结果表明:(1)油气处理装置进口和出口ρ(TVOC)分别为436~706 g·m^(-3)和4.98~10.04 g·m^(-3),VOCs排放主要为烷烃(72%±4%)、含氧有机物(14%±2%)和烯烃(11%±5%).不同处理工艺VOCs排放差异较小,关键物种均为异戊烷(约25%),其次为正丁烷、异丁烷和正戊烷.(2)油气处理装置出口排放的VOCs臭氧生成系数(SR值)为2.6~3.3 g·g^(-1),OFP为3.5~25.6 g·m^(-3),其中烯烃对OFP贡献率(43%~69%)最大,其次为烷烃(20%~35%)和含氧有机物(10%~22%),OFP主要贡献物种为丁烯、顺-2-丁烯、反-2-丁烯、异戊烷和丙醛.(3)油气处理装置出口排放的VOCs中芳烃对SOAP贡献率(80%~92%)最大,SOAP主要贡献物种为甲苯、 1,2,4-三甲苯、 1,3,5-三甲苯和对-二乙基苯.结果显示,油气处理装置排放的VOCs各物种对二次污染贡献差异较大,丁烯类物种和甲苯类芳烃是车用汽油和油气处理装置VOCs排放控制的重点.
Vapor processing device is a device that can control the headspace pressure in the underground storage tanks and recover the vapor.By analyzing the chemical composition of volatile organic compounds(VOCs) at the inlet and outlet of the vapor processing device,the ozone formation potential(OFP) and secondary organic aerosol formation potential(SOAP) were estimated by maximum incremental reaction(MIR) and fractional aerosol coefficients(FAC),and the secondary pollution formation contribution of VOCs were quantitatively evaluated.The results showed that:(1) the ρ(total volatile organic compounds,TVOC) at the inlet and outlet of the vapor processing device were 436-706 g·m^(-3) and 4.98-10.04 g·m^(-3),respectively.Alkanes(72%±4%),oxygenated organics(14%±2%),and olefins(11%±5%) were the dominant components of VOCs emissions.There were little differences in VOCs emissions from the different vapor processing devices;the key species were i-pentane(approximately 25%),followed by n-butane,i-butane,and n-pentane.(2) The ozone source reactivity(SR) of VOCs emissions from the outlet of the vapor processing device was 2.6-3.3 g·g^(-1),and the OFP was 3.5-25.6 g·m^(-3).Olefins contributed the most(43%-69%),followed by alkanes(20%-35%) and oxygenated organics(10%-22%).Butene,cis-2-butene,trans-2-butene,i-pentane,and propionaldehyde were the species that highly contributed to OFP.(3) Aromatics in VOCs emissions contributed the most to SOAP(80%-92%),and the main active species were toluene,1,2,4-trimethylbenzene,1,3,5-trimethylbenzene,and p-diethylbenzene.The research showed that different VOCs species emitted by the vapor processing device contributed obvious differences to the secondary atmospheric pollution,and butene species and aromatics such as toluene were the focus of VOCs emission control of vehicle gasoline and vapor processing device.
作者
胡玮
黄玉虎
梁文俊
刘明宇
杨天羿
任碧琪
HU Wei;HUANG Yu-hu;LIANG Wen-jun;LIU Ming-yu;YANG Tian-yi;REN Bi-qi(Key Laboratory of Beijing on Regional Air Pollution Control,Faculty of Environment and Life,Beijing University of Technology,Beijing 100124,China;Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Control Technology and Applications,Beijing Municipal Research Institute of Eco-Environmental Protection,Beijing 100037,China;School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China;Beijing Vehicle Emission Management Center,Beijing 100176,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2023年第2期709-718,共10页
Environmental Science
基金
O3和PM2.5复合污染协同防控科技攻关预研课题项目(DQGG202023)
北京市科学技术协会2021-2023年度青年人才托举工程项目
北京市生态环境保护科学研究院基金项目(Y2021-003)。
