Rumei Li1,2, Yulong Yan  1, Lin Peng1, Yinghui Li1, Zhuocheng Liu1, Zhanchun Fan3, Huanfeng Li3, Yang Xu1,2, Cheng Wang1,2, Dongmei Hu1, Zhiyong Li4

1 MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
2 School for Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
3 Shanxi Ecological Environment Monitoring Center, Taiyuan 030027, China
4 School of Environmental Science and Engineering, North China Electric Power University, Baoding 07100, China


Received: April 11, 2020
Revised: June 11, 2020
Accepted: June 16, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Li, R., Yan, Y., Peng, L., Li, Y., Liu, Z., Fan, Z., Li, H., Xu, Y., Wang, C., Hu, D., Li, Z. (2021). Segment-based Volatile Organic Compound Emission Characteristics from Different Types of Coking Plants in China. Aerosol Air Qual. Res. 21, 200145.


  • Typical VOCs source profiles of major coking plants in China were established.
  • Segments-based VOCs source profiles during coking processes was different.
  • VOCs emission factors of non-recovery coking process was 96 g Mg1 coke.
  • VOCs from oven leaks in mechanical coking plant had a higher reactivity.
  • Phasing out non-recovery coking plant would help reducing VOCs emission.


The source profiles, emission factors, and chemical reactivity of volatile organic compounds (VOCs) generated by two typical coking plants, one employing a non-recovery process and the other, a mechanical process, in Shanxi Province, a major coking hub in China, were determined for different segments of coke production during normal operations. The primary components in the stack flue gas were ethylene, 1-butene, benzene, acetylene, and 2,2-dimethylbutane for the non-recovery plant and styrene, benzene, and ethylene for the mechanical plant. The fugitive emissions were also monitored at the mechanical plant, and the most abundant species leaking from the oven were benzene, toluene, ethane, m-xylene, and ethylene, whereas those leaking from byproducts were benzene, propane, ethane, ethylene, n-pentane, n-butane, isobutene, 1-butene, toluene, and propylene. The stack flue gas at the non-recovery and mechanical coking plants exhibited VOC emission factors of 96 g Mg–1-coke and 0.4 g Mg–1-coke, respectively; thus, VOCs released by the former merit greater concern. Since the highest ozone formation potential (OFP) was observed for the stack flue gas at the non-recovery plant (80.26 mg m–3), followed by fugitive oven emissions at the mechanical plant (7.22 mg m–3), controlling these VOCs will significantly reduce their conversion into ozone. Overall, replacing non-recovery coking plants with mechanical coking plants will decrease VOC emissions and improve the ambient air quality in China.

Keywords: Volatile organic compounds, Source profiles, Emission factors, Coking plant, Coking segments


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