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J Environ Sci (China)

Title:		Characteristics and ozone formation potential of volatile organic compounds in emissions from a typical Chinese coking plant
Author(s):		Zhang X; Wang D; Liu Y; Cui Y; Xue Z; Gao Z; Du J;
Address:		"State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: zhangxm@craes.org.cn. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China"
Journal Title:		J Environ Sci (China)
Year:		2020
Volume:		20200504
Issue:
Page Number:		183 - 189
DOI:		10.1016/j.jes.2020.03.018
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Coking industry is an important volatile organic compounds (VOCs) emission source in China, however, detailed information on VOCs emissions is lacking. Therefore, we selected a typical mechanized coking plant and collected air samples according to the Emission Standard of Pollutants for Coking Chemical Industry (GB16171-2012). Using gas chromatography-mass spectrometry method, we analyzed the VOCs in the air samples, and applied maximum increment reactivity (MIR) rule to estimate ozone formation potential (OFP) of the VOCs emitted from the coke production. More than 90 VOCs species were detected from the coking plant, including alkanes, alkenes, alkynes, aromatic hydrocarbons, halogenated hydrocarbons and oxygenated VOCs. The concentrations of VOCs (rho(VOCs)) generated at different stages of the coking process are significantly different. rho(VOCs) from coke oven chimney had the highest concentration (87.1 mg/m(3)), followed by coke pushing (4.0 mg/m(3)), coal charging (3.3 mg/m(3)) and coke oven tops (1.1 mg/m(3)). VOCs species emitted from the coke production processes were dominated by alkanes and alkenes, but the composition proportions were different at the different stages. Alkenes were the most abundant emission species in flue gases of the coke oven chimney accounting for up to 66% of the total VOCs, while the VOCs emissions from coke pushing and coal charging were dominated by alkanes (36% and 42%, respectively), and the alkanes and alkenes emitted from coke oven top were similar (31% and 29%, respectively). Based on above results, reduction of VOCs emissions from coke oven chimney flue gases is suggested to be an effective measure, especially for alkenes"
Keywords:		Air Pollutants/*analysis China *Coke Environmental Monitoring Ozone/*analysis Volatile Organic Compounds/*analysis Coking process O(3) Ozone formation potential Reaction activity Volatile organic compounds;
Notes:		"MedlineZhang, Xinmin Wang, Di Liu, Yan Cui, Yufan Xue, Zhigang Gao, Zhifeng Du, Jinhong eng Netherlands 2020/07/13 J Environ Sci (China). 2020 Sep; 95:183-189. doi: 10.1016/j.jes.2020.03.018. Epub 2020 May 4"