Journal of Mechanical Science and Technology

, Volume 32, Issue 9, pp 4517–4527 | Cite as

Detailed in-furnace measurements in a pulverized coal-fired furnace with combined woody biomass co-firing and air staging

  • Minsung Choi
  • Xinzhuo Li
  • Kibeom Kim
  • Yonmo Sung
  • Gyungmin ChoiEmail author


This paper presents a detailed experimental description of the combined effects of woody biomass co-firing and air staging on NO emissions and burnout performance in a pulverized coal-fired furnace. The co-combustion of woody biomass and bituminous coal was evaluated using woody biomass co-firing proportions of 0 % to 30 % with intervals of 10 %. Detailed in-furnace gas temperature and gas-phase concentration for species such as O2, CO2, CO and NO were measured for the co-firing flames, both with and without air staging. The overall temperature of the woody biomass co-firing flames was higher than that of the pure bituminous coal flame. This effect was more pronounced for air-staged combustion than for combustion without air staging. Co-firing woody biomass with air staging strongly affected NO reduction efficiency, whereas NO emissions were insignificant for no-staged firing. The deteriorating effect of air staging on burnout performance was a function of the woody biomass co-firing ratio. NO reduction efficiency for the air-staged flames was improved by more than 40 % in both flames for woody biomass co-firing proportions of 10 % and 20 %.


Woody biomass co-firing Pulverized coal combustion Air-staged combustion NOx reduction Burnout performance Detailed in-furnace measurements 


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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Minsung Choi
    • 1
  • Xinzhuo Li
    • 1
  • Kibeom Kim
    • 1
  • Yonmo Sung
    • 2
  • Gyungmin Choi
    • 1
    Email author
  1. 1.School of Mechanical EngineeringPusan National UniversityBusanKorea
  2. 2.Energy Technology Development TeamHyundai Steel CompanyChungcheongnam-doKorea

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