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Oxy-fuel combustion in circulating fluidized bed boilers

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  • Leckner, Bo
  • Gómez-Barea, Alberto

Abstract

The conditions for CO2 reduction in a circulating fluidized bed (CFB) oxy-boiler are studied, that is, operation with pure oxygen, diluted by recirculated flue gases to moderate the combustion process. Two cases are analyzed: the ready-to-convert case, a normal air-fired CFB boiler, only slightly modified to be operated with oxygen instead of air for CO2 capture, and a more general option, an entirely new design, employing high oxygen concentration in the input to the oxy-fuel CFB boiler. It is found that at a given fuel load, the relevant parameters for maintaining the CFB performance (bed temperature and fluidization velocity) in the ready-to-convert case cannot be kept entirely equal to those in the air-fired case, and some compromise has to be found. The new-design case results in a smaller boiler than that of the comparable air-fired case, depending on the oxygen concentration and the corresponding flue-gas recirculation. This case is expected to contribute favorably to reduction of the cost of CO2 removal.

Suggested Citation

  • Leckner, Bo & Gómez-Barea, Alberto, 2014. "Oxy-fuel combustion in circulating fluidized bed boilers," Applied Energy, Elsevier, vol. 125(C), pages 308-318.
    • Handle: RePEc:eee:appene:v:125:y:2014:i:c:p:308-318
    DOI: 10.1016/j.apenergy.2014.03.050
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    References listed on IDEAS

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    1. Bolea, Irene & Romeo, Luis M. & Pallarés, David, 2012. "The role of external heat exchangers in oxy-fuel circulating fluidized bed," Applied Energy, Elsevier, vol. 94(C), pages 215-223.
    2. Hu, Yukun & Yan, Jinyue, 2012. "Characterization of flue gas in oxy-coal combustion processes for CO2 capture," Applied Energy, Elsevier, vol. 90(1), pages 113-121.
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    Cited by:

    1. Seddighi, Sadegh, 2017. "Design of large scale oxy-fuel fluidized bed boilers: Constant thermal power and constant furnace size scenarios," Energy, Elsevier, vol. 118(C), pages 1286-1294.
    2. Chen, Shiyi & Yu, Ran & Soomro, Ahsanullah & Xiang, Wenguo, 2019. "Thermodynamic assessment and optimization of a pressurized fluidized bed oxy-fuel combustion power plant with CO2 capture," Energy, Elsevier, vol. 175(C), pages 445-455.
    3. Gao, Mingming & Hong, Feng & Liu, Jizhen, 2017. "Investigation on energy storage and quick load change control of subcritical circulating fluidized bed boiler units," Applied Energy, Elsevier, vol. 185(P1), pages 463-471.
    4. Ling, Jester Lih Jie & Yang, Won & Park, Han Saem & Lee, Ha Eun & Lee, See Hoon, 2023. "A comparative review on advanced biomass oxygen fuel combustion technologies for carbon capture and storage," Energy, Elsevier, vol. 284(C).
    5. 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.
    6. Lauri Loo & Alar Konist & Dmitri Neshumayev & Tõnu Pihu & Birgit Maaten & Andres Siirde, 2018. "Ash and Flue Gas from Oil Shale Oxy-Fuel Circulating Fluidized Bed Combustion," Energies, MDPI, vol. 11(5), pages 1-12, May.
    7. Seddighi, Sadegh & Clough, Peter T. & Anthony, Edward J. & Hughes, Robin W. & Lu, Ping, 2018. "Scale-up challenges and opportunities for carbon capture by oxy-fuel circulating fluidized beds," Applied Energy, Elsevier, vol. 232(C), pages 527-542.
    8. Hu, Yukun & Wang, Jihong & Tan, CK & Sun, Chenggong & Liu, Hao, 2018. "Coupling detailed radiation model with process simulation in Aspen Plus: A case study on fluidized bed combustor," Applied Energy, Elsevier, vol. 227(C), pages 168-179.
    9. Xu, Mingxin & Li, Shiyuan & Wu, Yinghai & Jia, Lufei & Lu, Qinggang, 2017. "The characteristics of recycled NO reduction over char during oxy-fuel fluidized bed combustion," Applied Energy, Elsevier, vol. 190(C), pages 553-562.
    10. 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.
    11. Singh, Ravi Inder & Kumar, Rajesh, 2016. "Current status and experimental investigation of oxy-fired fluidized bed," Renewable and Sustainable Energy Reviews, Elsevier, vol. 61(C), pages 398-420.
    12. Janusz Kotowicz & Sebastian Michalski & Mateusz Brzęczek, 2019. "The Characteristics of a Modern Oxy-Fuel Power Plant," Energies, MDPI, vol. 12(17), pages 1-34, September.
    13. Bu, Changsheng & Gómez-Barea, Alberto & Chen, Xiaoping & Leckner, Bo & Liu, Daoyin & Pallarès, David & Lu, Ping, 2016. "Effect of CO2 on oxy-fuel combustion of coal-char particles in a fluidized bed: Modeling and comparison with the conventional mode of combustion," Applied Energy, Elsevier, vol. 177(C), pages 247-259.
    14. Najmus S. Sifat & Yousef Haseli, 2019. "A Critical Review of CO 2 Capture Technologies and Prospects for Clean Power Generation," Energies, MDPI, vol. 12(21), pages 1-33, October.
    15. Li, Shiyuan & Xu, Mingxin & Jia, Lufei & Tan, Li & Lu, Qinggang, 2016. "Influence of operating parameters on N2O emission in O2/CO2 combustion with high oxygen concentration in circulating fluidized bed," Applied Energy, Elsevier, vol. 173(C), pages 197-209.
    16. Chen Yang & Haochuang Wu & Kangjie Deng & Hangxing He & Li Sun, 2019. "Study on Powder Coke Combustion and Pollution Emission Characteristics of Fluidized Bed Boilers," Energies, MDPI, vol. 12(8), pages 1-18, April.
    17. Moon, Ji-Hong & Jo, Sung-Ho & Park, Sung Jin & Khoi, Nguyen Hoang & Seo, Myung Won & Ra, Ho Won & Yoon, Sang-Jun & Yoon, Sung-Min & Lee, Jae-Goo & Mun, Tae-Young, 2019. "Carbon dioxide purity and combustion characteristics of oxy firing compared to air firing in a pilot-scale circulating fluidized bed," Energy, Elsevier, vol. 166(C), pages 183-192.
    18. Wu, Zhijun & Kang, Zhe & Deng, Jun & Hu, Zongjie & Li, Liguang, 2016. "Effect of oxygen content on n-heptane auto-ignition characteristics in a HCCI engine," Applied Energy, Elsevier, vol. 184(C), pages 594-604.
    19. Salinero, J. & Gómez-Barea, A. & Fuentes-Cano, D. & Leckner, B., 2018. "The influence of CO2 gas concentration on the char temperature and conversion during oxy-fuel combustion in a fluidized bed," Applied Energy, Elsevier, vol. 215(C), pages 116-130.
    20. Chen, Yuyang & Yang, Shiliang & Hu, Jianhang & Wang, Hua, 2023. "Investigation of the oxy-fuel combustion process in the full-loop circulating fluidized bed," Energy, Elsevier, vol. 283(C).

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