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NOx reduction mechanism in coal combustion with recycled CO2

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  • Okazaki, K.
  • Ando, T.

Abstract

Coal combustion with CO2O2 is one of several promising new technologies associated with mitigating the CO2 rise in the atmosphere. In coal combustion with recycled CO2, the amount of NOx exhausted from the system is reduced to less than one third of that with combustion in air. This result is associated with decreased conversion of fuel-N to NOx and reduction of recycled NOx in the flame zone. The effects of CO2 concentration, reduction of recycled NOx, and interaction between fuel-N and recycled NOx on the decrease of the final NOx exhausted from the coal-combustion system with recycled CO2 have been separated for appropriate NOx-reduction mechanisms.

Suggested Citation

  • Okazaki, K. & Ando, T., 1997. "NOx reduction mechanism in coal combustion with recycled CO2," Energy, Elsevier, vol. 22(2), pages 207-215.
    • Handle: RePEc:eee:energy:v:22:y:1997:i:2:p:207-215
    DOI: 10.1016/S0360-5442(96)00133-8
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    Cited by:

    1. Tan, Y. & Jia, L. & Wu, Y. & Anthony, E.J., 2012. "Experiences and results on a 0.8MWth oxy-fuel operation pilot-scale circulating fluidized bed," Applied Energy, Elsevier, vol. 92(C), pages 343-347.
    2. Tang, Yuting & Ma, Xiaoqian & Lai, Zhiyi & Zhou, Daoxi & Lin, Hai & Chen, Yong, 2012. "NOx and SO2 emissions from municipal solid waste (MSW) combustion in CO2/O2 atmosphere," Energy, Elsevier, vol. 40(1), pages 300-306.
    3. Fan, Weidong & Li, Yu & Guo, Qinghong & Chen, Can & Wang, Yong, 2017. "Coal-nitrogen release and NOx evolution in the oxidant-staged combustion of coal," Energy, Elsevier, vol. 125(C), pages 417-426.
    4. Xu, Mingxin & Li, Shiyuan & Wu, Yinghai & Jia, Lufei, 2017. "Reduction of recycled NO over char during oxy-fuel fluidized bed combustion: Effects of operating parameters," Applied Energy, Elsevier, vol. 199(C), pages 310-322.
    5. Wang, B. & Sun, L.S. & Su, S. & Xiang, J. & Hu, S. & Fei, H., 2012. "A kinetic study of NO formation during oxy-fuel combustion of pyridine," Applied Energy, Elsevier, vol. 92(C), pages 361-368.
    6. Imran Ali Shah & Xiang Gou & Jinxiang Wu, 2019. "Simulation Study of an Oxy-Biomass-Based Boiler for Nearly Zero Emission Using Aspen Plus," Energies, MDPI, vol. 12(10), pages 1-21, May.
    7. Liang, Xiaorui & Wang, Qinhui & Luo, Zhongyang & Eddings, Eric & Ring, Terry & Li, Simin & Lin, Junjie & Xue, Shuang & Han, Long & Xie, Guilin, 2019. "Experimental and numerical investigation on sulfur transformation in pressurized oxy-fuel combustion of pulverized coal," Applied Energy, Elsevier, vol. 253(C), pages 1-1.
    8. Riaza, J. & Gil, M.V. & Álvarez, L. & Pevida, C. & Pis, J.J. & Rubiera, F., 2012. "Oxy-fuel combustion of coal and biomass blends," Energy, Elsevier, vol. 41(1), pages 429-435.
    9. Engin, Berrin & Kayahan, Ufuk & Atakül, Hüsnü, 2020. "A comparative study on the air, the oxygen-enriched air and the oxy-fuel combustion of lignites in CFB," Energy, Elsevier, vol. 196(C).
    10. Yin, Chungen & Yan, Jinyue, 2016. "Oxy-fuel combustion of pulverized fuels: Combustion fundamentals and modeling," Applied Energy, Elsevier, vol. 162(C), pages 742-762.
    11. Rahman, Zia ur & Wang, Xuebin & Zhang, Jiaye & Yang, Zhiwei & Dai, Gaofeng & Verma, Piyush & Mikulcic, Hrvoje & Vujanovic, Milan & Tan, Houzhang & Axelbaum, Richard L., 2022. "Nitrogen evolution, NOX formation and reduction in pressurized oxy coal combustion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 157(C).
    12. Li, Shiyuan & Li, Haoyu & Li, Wei & Xu, Mingxin & Eddings, Eric G. & Ren, Qiangqiang & Lu, Qinggang, 2017. "Coal combustion emission and ash formation characteristics at high oxygen concentration in a 1MWth pilot-scale oxy-fuel circulating fluidized bed," Applied Energy, Elsevier, vol. 197(C), pages 203-211.

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