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Oxy-fuel combustion of selected solid fuels under atmospheric and elevated pressures

Author

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  • Lasek, Janusz A.
  • Janusz, Marcin
  • Zuwała, Jarosław
  • Głód, Krzysztof
  • Iluk, Andrzej

Abstract

Oxy-fuel combustion is suggested as a clean technique for energy conversion with respect to the reduction of CO2 and NOx emissions. The positive effect of NOx reduction can be enhanced by an increase of the pressure inside the combustion chamber. The oxy-fuel combustion of bituminous and lignite coals was investigated. The influence of process parameters, such as the type of fuel, the type of oxidant and the pressure, on the emissions of NOx, N2O, and other exhaust gas compounds was investigated. The experiments were performed using a prototype, laboratory-scale (fuel input of up to 3 kg/h) pressurised fluidised-bed combustor (BFB). The main process parameters were a maximal pressure of 6 bar, a maximal temperature of 910 °C and an oxidant flow rate of 39 kg/h. The results of the experiment performed with the pressurised Flexi-Burn™ procedure are presented and discussed. In particular, the emissions of NO and N2O from air-fired and oxy-fuel processes were compared. The NO emission was significantly reduced under higher pressures. The maximal NO reduction (due to an increase in the pressure) was as high as 50%, which can be explained by the promotion of the char + NO reaction.

Suggested Citation

  • Lasek, Janusz A. & Janusz, Marcin & Zuwała, Jarosław & Głód, Krzysztof & Iluk, Andrzej, 2013. "Oxy-fuel combustion of selected solid fuels under atmospheric and elevated pressures," Energy, Elsevier, vol. 62(C), pages 105-112.
    • Handle: RePEc:eee:energy:v:62:y:2013:i:c:p:105-112
    DOI: 10.1016/j.energy.2013.04.079
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    3. Lasek, Janusz A. & Kopczyński, Marcin & Janusz, Marcin & Iluk, Andrzej & Zuwała, Jarosław, 2017. "Combustion properties of torrefied biomass obtained from flue gas-enhanced reactor," Energy, Elsevier, vol. 119(C), pages 362-368.
    4. Haili Liu & Xu Zhang & Qingchao Hong, 2021. "Emission Characteristics of Pollution Gases from the Combustion of Food Waste," Energies, MDPI, vol. 14(19), pages 1-11, October.
    5. Monika Kosowska-Golachowska & Adam Luckos & Tomasz Czakiert, 2022. "Composition of Flue Gases during Oxy-Combustion of Energy Crops in a Circulating Fluidized Bed," Energies, MDPI, vol. 15(19), pages 1-13, September.
    6. Pang, Lei & Shao, Yingjuan & Zhong, Wenqi & Liu, Hao, 2018. "Experimental investigation on the coal combustion in a pressurized fluidized bed," Energy, Elsevier, vol. 165(PB), pages 1119-1128.
    7. Dobó, Zsolt & Backman, Marc & Whitty, Kevin J., 2019. "Experimental study and demonstration of pilot-scale oxy-coal combustion at elevated temperatures and pressures," Applied Energy, Elsevier, vol. 252(C), pages 1-1.
    8. Hu, Xianzhong & Yu, Qingbo & Liu, Junxiang & Sun, Nan, 2014. "Investigation of laminar flame speeds of CH4/O2/CO2 mixtures at ordinary pressure and kinetic simulation," Energy, Elsevier, vol. 70(C), pages 626-634.
    9. Kopczyński, Marcin & Lasek, Janusz A. & Iluk, Andrzej & Zuwała, Jarosław, 2017. "The co-combustion of hard coal with raw and torrefied biomasses (willow (Salix viminalis), olive oil residue and waste wood from furniture manufacturing)," Energy, Elsevier, vol. 140(P1), pages 1316-1325.
    10. Yang, Zhiwei & Khatri, Dishant & Verma, Piyush & Li, Tianxiang & Adeosun, Adewale & Kumfer, Benjamin M. & Axelbaum, Richard L., 2021. "Experimental study and demonstration of pilot-scale, dry feed, oxy-coal combustion under pressure," Applied Energy, Elsevier, vol. 285(C).
    11. Pang, Lei & Shao, Yingjuan & Zhong, Wenqi & Gong, Zheng & Liu, Hao, 2020. "Experimental study of NOx emissions in a 30 kWth pressurized oxy-coal fluidized bed combustor," Energy, Elsevier, vol. 194(C).
    12. Kong, Runjuan & Li, Wei & Wang, Haigang & Ren, Qiangqiang, 2024. "Energy efficiency analysis and optimization of a pressurized oxy-fuel circulating fluidized bed combustion system," Energy, Elsevier, vol. 286(C).
    13. Tang, YuTing & Ma, XiaoQian & Lai, ZhiYi & Fan, Yunxiang, 2015. "Thermogravimetric analyses of co-combustion of plastic, rubber, leather in N2/O2 and CO2/O2 atmospheres," Energy, Elsevier, vol. 90(P1), pages 1066-1074.
    14. 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.
    15. Wang, Chang'an & Zhao, Lin & Sun, Ruijin & Zhou, Lei & Jin, Liyan & Che, Defu, 2022. "Experimental study on NO emission and ash deposition during oxy-fuel combustion of high-alkali coal under oxygen-staged conditions," Energy, Elsevier, vol. 251(C).
    16. 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.
    17. Tokarski, Stanisław & Głód, Krzysztof & Ściążko, Marek & Zuwała, Jarosław, 2015. "Comparative assessment of the energy effects of biomass combustion and co-firing in selected technologies," Energy, Elsevier, vol. 92(P1), pages 24-32.
    18. Zhang, Wenda & Sun, Shaozeng & Zhao, Yijun & Zhao, Zujie & Wang, Pengxiang & Feng, Dongdong & Li, Pengfei, 2020. "Effects of total pressure and CO2 partial pressure on the physicochemical properties and reactivity of pressurized coal char produced at rapid heating rate," Energy, Elsevier, vol. 208(C).
    19. Peng, Wanxi & Liu, Zhenling & Motahari-Nezhad, Mohsen & Banisaeed, Mohammad & Shahraki, Saeid & Beheshti, Mehdi, 2016. "A detailed study of oxy-fuel combustion of biomass in a circulating fluidized bed (CFB) combustor: Evaluation of catalytic performance of metal nanoparticles (Al, Ni) for combustion efficiency improve," Energy, Elsevier, vol. 109(C), pages 1139-1147.
    20. Oliveira, Flávio A.D. & Carvalho, João A. & Sobrinho, Pedro M. & de Castro, André, 2014. "Analysis of oxy-fuel combustion as an alternative to combustion with air in metal reheating furnaces," Energy, Elsevier, vol. 78(C), pages 290-297.
    21. 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).
    22. Kayahan, Ufuk & Özdoğan, Sibel, 2016. "Oxygen enriched combustion and co-combustion of lignites and biomass in a 30 kWth circulating fluidized bed," Energy, Elsevier, vol. 116(P1), pages 317-328.
    23. Lasek, Janusz A. & Głód, Krzysztof & Słowik, Krzysztof, 2021. "The co-combustion of torrefied municipal solid waste and coal in bubbling fluidised bed combustor under atmospheric and elevated pressure," Renewable Energy, Elsevier, vol. 179(C), pages 828-841.

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    Keywords

    Pressurised oxy-fuel; NOx; Coal;
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