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Characteristics of distinct ash flows in a biomass thermal power plant with bubbling fluidised bed combustor

Author

Listed:
  • Tarelho, L.A.C.
  • Teixeira, E.R.
  • Silva, D.F.R.
  • Modolo, R.C.E.
  • Labrincha, J.A.
  • Rocha, F.

Abstract

Characteristics of biomass used as fuel and distinct ash flows in a thermal power plant with BFBC (bubbling fluidised bed combustion) technology were studied. An integrated approach involving chemical composition, microscopy analysis, mineralogy, and thermal behaviour were used to characterize the ash. The ashes have a low unburned content, typically below 3 wt.% (dry basis), with higher values in ash from the electrostatic precipitator. The chemical element present in higher concentration in the several ash flows is Si (>20 wt.%, dry basis). The fly ash from the electrostatic precipitator are enriched in heavy metals when compared to other ash, and Zn is the heavy metal found in higher concentration (but <225 ppm wt., dry basis), followed by Cr, Pb, Cu and Ni in decreasing order of abundance. The distinct ash produce leaching solutions with pH values in range 11.9–12.8, and conductivity in the range 4.7–19.5 mS/cm, with higher values in ash from electrostatic precipitator. Ca is the element in higher concentration in the ash leachates, followed by K, Na and Cl. The concentration of heavy metals in the leachates is relatively low. The biomass quality influences the ash characteristics, and an appropriate management of biomass and ash is need to improve the performance of thermal power plants.

Suggested Citation

  • Tarelho, L.A.C. & Teixeira, E.R. & Silva, D.F.R. & Modolo, R.C.E. & Labrincha, J.A. & Rocha, F., 2015. "Characteristics of distinct ash flows in a biomass thermal power plant with bubbling fluidised bed combustor," Energy, Elsevier, vol. 90(P1), pages 387-402.
  • Handle: RePEc:eee:energy:v:90:y:2015:i:p1:p:387-402
    DOI: 10.1016/j.energy.2015.07.036
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    Cited by:

    1. Pio, D.T. & Tarelho, L.A.C. & Pinto, R.G. & Matos, M.A.A. & Frade, J.R. & Yaremchenko, A. & Mishra, G.S. & Pinto, P.C.R., 2018. "Low-cost catalysts for in-situ improvement of producer gas quality during direct gasification of biomass," Energy, Elsevier, vol. 165(PB), pages 442-454.
    2. da Costa, Tamíris Pacheco & Quinteiro, Paula & Arroja, Luis & Dias, Ana Cláudia, 2020. "Environmental comparison of forest biomass residues application in Portugal: Electricity, heat and biofuel," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    3. Nguyen, Hoang Khoi & Moon, Ji Hong & Jo, Sung Ho & Park, Sung Jin & Bae, Dal Hee & Seo, Myung Won & Ra, Ho Won & Yoon, Sang-Jun & Yoon, Sung-Min & Lee, Jae Goo & Mun, Tae-Young & Song, Byungho, 2021. "Ash characteristics of oxy-biomass combustion in a circulating fluidized bed with kaolin addition," Energy, Elsevier, vol. 230(C).
    4. Mario Martín-Gamboa & Paula Quinteiro & Ana Cláudia Dias & Diego Iribarren, 2021. "Comparative Social Life Cycle Assessment of Two Biomass-to-Electricity Systems," IJERPH, MDPI, vol. 18(9), pages 1-15, May.
    5. Crespo, Bárbara & Patiño, David & Regueiro, Araceli & Granada, Enrique, 2016. "Performance of a lab-scale tubular-type electrostatic precipitator using a diesel engine particle emission source," Energy, Elsevier, vol. 116(P3), pages 1444-1453.
    6. Li, Fenghai & Li, Yang & Fan, Hongli & Wang, Tao & Guo, Mingxi & Fang, Yitian, 2019. "Investigation on fusion characteristics of deposition from biomass vibrating grate furnace combustion and its modification," Energy, Elsevier, vol. 174(C), pages 724-734.

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