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Citation: QU Cheng-rui, XU Bin, WU Jian, LIU Jian-xin, WANG Xue-tao. Effect of limestone addition on PM2.5 formation during fluidized bed coal combustion under O2/CO2 atmosphere[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(8): 1020-1024. shu

Effect of limestone addition on PM2.5 formation during fluidized bed coal combustion under O2/CO2 atmosphere

  • 1.

    College of Vehicle & Motive Power Engineering, Henan University of Science and Technology, Luoyang 471003, China

  • Corresponding author: QU Cheng-rui, 
  • Received Date: 11 March 2013
    Available Online: 29 May 2013

    Fund Project: 国家自然科学基金(50806020) (50806020) 河南省教育厅科学技术研究重点项目(13A470238). (13A470238)

  • The effect of limestone addition on the emission characteristics of PM2.5 (particulates with aerodynamic diameter less than 2.5 μm) was studied in a fluidized bed combustor. The combustion tests were carried out at 1 123 K under O2/CO2 atmosphere. The PM2.5 generated from coal combustion was collected and analyzed with an Electrical Low Pressure Impactor (ELPI). The results indicate that limestone has a great effect on the formation of PM2.5 during coal combustion under O2/CO2 atmosphere. The concentration of PM1.0 is diminished; but the concentration of PM1.0~2.5 is enhanced slightly with the addition of limestone. The mass size distribution of PM2.5 is similar, which displays two peaks around 0.2 and 2.0 μm, respectively. As the molar ratio of Ca/S increases, the concentrations of Si, Na, K, S, and Cu decrease. As the particle size decreases, the concentrations of S, Cu, K, and Na increase, but the concentrations of Si decrease.
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