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Effect of different fuel NO models on the prediction of NO formation/reduction characteristics in a pulverized coal combustion field

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  • Hashimoto, Nozomu
  • Watanabe, Hiroaki
  • Kurose, Ryoichi
  • Shirai, Hiromi

Abstract

To investigate the effects of fuel NO formation models on the prediction of NO concentrations in a coal combustion field, numerical simulations for a coal combustion field in a 760 kW test furnace were performed. Three models, those proposed by De Soete, Chen et al. and Mitchell et al. were employed to calculate fuel NO formation originating from volatile matter. The results show that the model proposed by Mitchell et al. reproduces the tendency of the experimental data better than the other two models. In addition, the difference between the NO conversion ratios of bituminous coal and sub-bituminous coal that contains a high level of moisture was examined in detail using simulation results from the model of Mitchell et al. It was found that the formation of a region with a low oxygen mole fraction immediately downstream of a region with a high NO production rate is essential to realize a low NO conversion ratio.

Suggested Citation

  • Hashimoto, Nozomu & Watanabe, Hiroaki & Kurose, Ryoichi & Shirai, Hiromi, 2017. "Effect of different fuel NO models on the prediction of NO formation/reduction characteristics in a pulverized coal combustion field," Energy, Elsevier, vol. 118(C), pages 47-59.
    • Handle: RePEc:eee:energy:v:118:y:2017:i:c:p:47-59
    DOI: 10.1016/j.energy.2016.12.003
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    References listed on IDEAS

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    6. Hashimoto, Nozomu & Shirai, Hiromi, 2014. "Numerical simulation of sub-bituminous coal and bituminous coal mixed combustion employing tabulated-devolatilization-process model," Energy, Elsevier, vol. 71(C), pages 399-413.
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    1. Luo, Kun & Zhao, Chunguang & Wen, Xu & Gao, Zhengwei & Bai, Yun & Xing, Jiangkuan & Fan, Jianren, 2019. "A priori study of an extended flamelet/progress variable model for NO prediction in pulverized coal flames," Energy, Elsevier, vol. 175(C), pages 768-780.
    2. Wenjie Ni & Haifeng Li & Yingyi Zhang & Zongshu Zou, 2019. "Effects of Fuel Type and Operation Parameters on Combustion and NO x Emission of the Iron Ore Sintering Process," Energies, MDPI, vol. 12(2), pages 1-21, January.
    3. Yadav, Sujeet & Yu, Panlong & Tanno, Kenji & Watanabe, Hiroaki, 2023. "Large eddy simulation of coal-ammonia flames with varied ammonia injection locations using a flamelet-based approach," Energy, Elsevier, vol. 276(C).

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