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8248013 
Journal Article 
2018年夏季某石化工业区VOCs浓度特征及活性物种 
Zhang, B; Jing, K; Wang, Q; An, X; Liu, B 
2021 
Chk 
Huanjing Kexue Yanjiu / Research of Environmental Sciences
ISSN: 1001-6929 
Editorial Board, Research of Environmental Sciences 
34 
6 
1318-1327 
Chinese 
The VOCs concentration and active species produced in a petrochemical industrial area in the summer of 2018 were characterized by continuously monitoring outputs using a combined system of airmo VOC expert C2-C6 and airmo VOC expert C6-C12 analyzers. The analytical results indicate that: (1) In the petrochemical industrial area, volume fractions φ(TVOCs) of 57 VOCs were 93.7×10-9±87.5×10-9 during the study period. Olefin recorded the highest proportion of VOCs (44.9%). The higher the average day φ(TVOCs), the higher the proportion of olefin. Species with high volume fractions were mainly consisted of low alkanes, n-hexane, toluene and benzene. (2) φ(TVOCs) in the petrochemical industry area had a significant change trend of being high at night and low during the day. The variation trend of each component was similar, and the variation range of olefin was higher than that of other components. (3) Ethylene, propylene, cis-2-butene and toluene were the major contributors to the formation of O3 in the petrochemical industrial area. The major contributions to the formation of secondary organic aerosols were toluene, isopropyl benzene and m/p-xylene. (4) PMF analysis indicted that the contribution of catalytic cracking was 51.7%, the contribution of catalytic reforming and waste-water treatment was 34.8%, and the contribution of oil storage facility spill was 13.5%. (5) A reduction of VOCs activity in the study area can significantly reduce O3 pollution. If the activity of VOCs and the volume fraction of NOx are simultaneously reduced, O3 pollution can be more effectively reduced. Although results from this investigation indicate that the emission intensity of VOCs in a petrochemical industrial area is relatively high, VOCs activity can be reduced by controlling key units such as catalytic cracking and active substances (for example, ethylene, propylene and toluene). The combined effect of reducing VOCs activity and controlling NOx emissions in the region at the same time will ultimately result in a reduction in O3 pollution. © 2021, Editorial Board, Research of Environmental Sciences. All right reserved. 
Active species; Concentration characteristics; Petrochemical industrial area; Volatile organic compounds (VOCs)