Journal of South China University of Technology(Natural Science) >

2025 , Vol. 53 >Issue 7: 11 - 20

DOI: https://doi.org/10.12141/j.issn.1000-565X.240235

Energy, Power & Electrical Engineering

Effect of Ozone on Polycyclic Aromatic Hydrocarbon Formation in Combustion of Biodiesel Surrogate

  • GAN Yunhua ,
  • LIU Zhuolong ,
  • KUANG Hualin ,
  • HAN Yanjie ,
  • LI Hua
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  • 1.School of Electric Power Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China
    2.Guangzhou Zhongdian Lixin Thermal Power Co. ，Ltd. ，Guangzhou 511340，Guangdong，China
甘云华（1979—），男，博士，教授，主要从事新型燃烧、高效传热等研究。E-mail： ganyh@scut.edu.cn

Received date: 2024-05-15

  Online published: 2024-12-24

Supported by

the National Natural Science Foundation of China(52376108);the Science and Technology Planning Project of Guangdong Province(2022A0505050004)

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Abstract

Studying the effect of Ozone (O3) on polycyclic aromatic hydrocarbon (PAH) during the combustion process of biodiesel can provide new insights for reducing soot emissions. A skeletal reaction mechanism of biodiesel surrogates coupled with an O3 reaction mechanism and a PAH reaction mechanism was constructed for modeling the effect and mechanism of O3 on PAH formation in a counterflow flame of biodiesel surrogates. The final mechanism consists of 138 species and 608 reactions. Analysis show that the addition of O₃ creates a localized rapid temperature rise zone on the fuel side. As the initial O₃ mole fraction increases, the temperature rise rate in this zone intensifies and its position shifts closer to the fuel outlet, resulting from the preliminary oxidation of the fuel releasing heat. Furthermore, the maximum mole fraction of PAH initially increases and subsequently decreases with increasing initial O₃ mole fraction. When initial O3 mole fraction increases to 0.04, the maximum mole fraction of major PAH such as benzene (A1), naphthalene (A2), anthracene (A3), and pyrene (A4) are 4.57, 6.76, 16.16, 12.38 times that at initial O3 mole fraction of 0.00, respectively. The addition of O3 has a significant impact on the concentration of PAH, and has the greatest impact on A3. At the same time, the pathway of benzene (A1) generation shifts from C₂H₂-dominated to C₂H₃-dominated mechanisms. And when initial O3 mole fraction increases to 0.12, the maximum mole fractions of A1, A2, A3, and A4 are 0.880, 0.357, 0.375, and 0.143 times that at initial O3 mole fraction of 0.00. It is because that the C2H3 radicals are oxidized, thereby inhibiting the production of A1.

Key words： biodiesel; polycyclic aromatic hydrocarbon; ozone; nitrogen oxides; reaction kinetics

Cite this article

GAN Yunhua , LIU Zhuolong , KUANG Hualin , HAN Yanjie , LI Hua . Effect of Ozone on Polycyclic Aromatic Hydrocarbon Formation in Combustion of Biodiesel Surrogate[J]. Journal of South China University of Technology(Natural Science), 2025 , 53(7) : 11 -20 . DOI: 10.12141/j.issn.1000-565X.240235

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