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Detailed kinetic modeling of acetylene decomposition/soot formation during quenching of coal pyrolysis in thermal plasma

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  • Yan, Binhang
  • Cheng, Yan
  • Li, Tianyang
  • Cheng, Yi

Abstract

A detailed chemical kinetic mechanism based on the Appel-Bockhorn-Frenklach (ABF) model was established to describe acetylene decomposition, ethylene formation, and soot formation during quenching in coal pyrolysis to acetylene process. The predictions agreed well with the reported acetylene pyrolysis experimental data. Numerical simulations were then performed to deeply understand the reaction behaviors during quenching of coal pyrolysis in thermal plasma, and to optimize the quenching design for better heat recovery. Two key operating parameters of quenching, i.e., the temperature after quenching and the quenching rate, were studied in detail and optimized after the kinetics were validated. The simulation results also proved that hydrogen can promote the formation of ethylene and inhibit the condensation of acetylene during quenching. In particular, in-depth discussion of acetylene decomposition and ethylene formation using this detailed kinetic mechanism combined with thermodynamic method provided a comprehensive understanding of the thermodynamics and kinetics interpreting pilot plant experimental data.

Suggested Citation

  • Yan, Binhang & Cheng, Yan & Li, Tianyang & Cheng, Yi, 2017. "Detailed kinetic modeling of acetylene decomposition/soot formation during quenching of coal pyrolysis in thermal plasma," Energy, Elsevier, vol. 121(C), pages 10-20.
    • Handle: RePEc:eee:energy:v:121:y:2017:i:c:p:10-20
    DOI: 10.1016/j.energy.2016.12.130
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    References listed on IDEAS

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    1. Sánchez, N.E. & Callejas, A. & Millera, A. & Bilbao, R. & Alzueta, M.U., 2012. "Formation of PAH and soot during acetylene pyrolysis at different gas residence times and reaction temperatures," Energy, Elsevier, vol. 43(1), pages 30-36.
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    Cited by:

    1. Liu, Rongtang & Liu, Ming & Fan, Peipei & Zhao, Yongliang & Yan, Junjie, 2018. "Thermodynamic study on a novel lignite poly-generation system of electricity-gas-tar integrated with pre-drying and pyrolysis," Energy, Elsevier, vol. 165(PB), pages 140-152.
    2. Kang, Yinhu & Sun, Yuming & Lu, Xiaofeng & Gou, Xiaolong & Sun, Sicong & Yan, Jin & Song, Yangfan & Zhang, Pengyuan & Wang, Quanhai & Ji, Xuanyu, 2018. "Soot formation characteristics of ethylene premixed burner-stabilized stagnation flame with dimethyl ether addition," Energy, Elsevier, vol. 150(C), pages 709-721.
    3. Yangxun Liu & Weinan Liu & Huihong Liao & Wenhua Zhou & Cangsu Xu, 2021. "An Experimental and Kinetic Modelling Study on Laminar Premixed Flame Characteristics of Ethanol/Acetone Mixtures," Energies, MDPI, vol. 14(20), pages 1-18, October.

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