ANALYSIS OF OZONE FORMATION POTENTIAL AND SECONDARY ORGANIC AEROSOL FORMATION POTENTIAL OF VOCs IN A COKING PLANT

XIAO Kai; ZHANG Xiao-wei; HAO Zhi-fei; ZHANG Yong-feng; SUN Jun-min

doi:10.13205/j.hjgc.202209003

Volume 40 Issue 9

Nov. 2022

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XIAO Kai, ZHANG Xiao-wei, HAO Zhi-fei, ZHANG Yong-feng, SUN Jun-min. ANALYSIS OF OZONE FORMATION POTENTIAL AND SECONDARY ORGANIC AEROSOL FORMATION POTENTIAL OF VOCs IN A COKING PLANT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(9): 19-25,43. doi: 10.13205/j.hjgc.202209003

Citation:

XIAO Kai, ZHANG Xiao-wei, HAO Zhi-fei, ZHANG Yong-feng, SUN Jun-min. ANALYSIS OF OZONE FORMATION POTENTIAL AND SECONDARY ORGANIC AEROSOL FORMATION POTENTIAL OF VOCs IN A COKING PLANT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(9): 19-25,43. doi: 10.13205/j.hjgc.202209003

Citation:

XIAO Kai, ZHANG Xiao-wei, HAO Zhi-fei, ZHANG Yong-feng, SUN Jun-min. ANALYSIS OF OZONE FORMATION POTENTIAL AND SECONDARY ORGANIC AEROSOL FORMATION POTENTIAL OF VOCs IN A COKING PLANT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(9): 19-25,43. doi: 10.13205/j.hjgc.202209003

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ANALYSIS OF OZONE FORMATION POTENTIAL AND SECONDARY ORGANIC AEROSOL FORMATION POTENTIAL OF VOCs IN A COKING PLANT

doi: 10.13205/j.hjgc.202209003

1. Institute of Chemical Industry, Inner Mongolia University of Technology, Hohhot 010051, China;
2. Key Laboratory of Coal-based Solid Waste Efficient Recycling in Inner Mongolia, Hohhot 010051, China

Received Date: 2021-10-25
Available Online: 2022-11-09

Abstract

Abstract

Due to the special process of the coking plant, the emission problems of sulfur dioxide, nitrogen oxides, particulate matter and VOCs are more prominent. Therefore, the emission characteristics of VOCs in the ambient air at the boundary of the coking plant were analyzed, the ozone formation potential of VOCs was evaluated according to the maximum incremental reaction activity method(MIR) and propylene-equivalent concentration method(PEC), and the secondary organic aerosol formation potential of VOCs was evaluated, according to the fractional aerosol coefficients method(FAC). The results showed that: 1) a total of 17 VOCs including aromatic hydrocarbons, halogenated hydrocarbons, olefins, sulfides and ketones were analyzed at five points in the upwind and downwind direction of the factory boundary. 2) There were significant differences in VOCs detected at the plant boundary in different regions, and the total mass concentration was 28.2~167.9 μg/m³, in which aromatic hydrocarbons accounted for the largest proportion in TVOCs at each point, reaching 51.01%~84.63%. 3) The OFP at the boundary of the cold drum of desulfurization and salt extraction was the largest, with a theoretical value of 335.51 μg/m³, and the OFP at the boundary of office and living area was the smallest, with a theoretical value of 47.06 μg/m³. The contribution rate of aromatic hydrocarbons to OFP was 27.21%~62.37%, that of olefins was 39.17%~61.84%, and that of halogenated hydrocarbons was 2.08%~14.56%. The change trend of OFP estimated by PEC method was consistent with that of MIR method, and the propylene-equivalent concentration range was 3.11~31.89 μg/m³; the contribution rates of propylene-equivalent concentration of aromatic hydrocarbons at each point were 37.10%, 51.46%, 66.79%, 58.80% and 22.74%, respectively. 4) The formation potential of SOA at each point was 0.452, 0.938, 2.517, 4.055, 0.495 μg/m³, respectively; aromatic hydrocarbons contributed the most to the formation potential of SOA. Substances with high mass concentration and reaction activity, such as propylene, toluene, xylene and vinyl chloride, were the VOCs components that need priority control and could be used as markers of VOCs in the ambient air of coking plants.

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References(30)

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