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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Zhou Zhi’en1, 2, Fang Weikai1, Luo Qian1, Wang Xiaochen1 and Wu Liping1
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DOI:10.17265/2162-5263/2017.11.001
Affiliation(s)
1. Chongqing Academy of Environmental Sciences, Chongqing 401147, China
2. Chongqing Environmental Monitoring Center, Chongqing 401147, China
ABSTRACT
To fully analyze emission characteristics of
VOCs (Volatile Organic Compounds) from automobile coating industry in Chongqing
city, related enterprises in the city were investigated in detail. The results
show that the emission of VOCs from the automobile industry in Chongqing city
was approximately 20,000 t in 2012, and the contribution rate of automobile
coating was 83%. Most VOCs discharged from automobile coating industry were
mainly from the use of coatings, diluents, curing agents and other materials
containing VOCs. During the process of automobile coating, VOCs were mainly produced
during the processes of spraying and drying. Besides, VOCs are partly produced during the processes of
mixing paint, gluing, waxing and repairing. The major ingredients of VOCs
discharged during the process of automobile coating were methylbenzene, dimethylbenzene,
trimethylbenzene, cumene, ethyl acetate, butyl alcohol, n-butyl alcohol,
isobutyl alcohol, formaldehyde, butanone, acetone, cyclohexanone and methyl
ethyl ketone. Besides, the ingredients of naphtha and aromatic hydrocarbon in
VOCs need to be determined. The maximum OFP (Ozone Formation Potential) of
the above pollutants by the typical enterprises was 900-1,300 mg/m3.
The production of SOA (Secondary Organic Aerosol) was 3,636-11,073 t/a, which
didn’t include the contribution of aldehydes, ketones, ethers and esters to SOA. This research could provide scientific reference for the
establishment of emission standard, control technology and management
methods of VOCs from automobile coating industry that accord with economic and
social development in Chongqing city.
KEYWORDS
Automobile coating, VOCs, environmental impact, ozone, SOA.
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