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Biochar contribution in biomass reburning technology and transformation mechanism of its nitrogen foundational groups at different oxygen contents

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  • Cao, Songshan
  • Duan, Feng
  • Wang, Ping
  • Chyang, ChienSong

Abstract

Biomass has been considered as an alternative fuel through reburning in utility boilers because of its vast availability and renewable nature. The biochar contribution in biomass reburning technology and the transformation mechanism of its nitrogen foundational groups at different oxygen contents were investigated in this study. Results demonstrate that the biochar contribution rate increased first and then decreased as the oxygen content increased. The peak value appeared at an oxygen content of 1.5%. As the oxygen content increases from 0 to 6%, the pyridine N (N-6) content gradually decreased from 47.73% to 36.86%, and the contents of pyridine N (N-5), quaternary N (N-Q), and nitrogen oxides N (N-X) increased by 2.67%, 2.88%, and 5.33%, respectively, in the sewage sludge char. In the peanut-shell char, the N-6 content decreased from 42.54% to 35.89%, the N-Q content increased from 19.11% to 24.59%. N-5 content has the minimum value, while N-X content has the maximum value at the oxygen content of 3%.

Suggested Citation

  • Cao, Songshan & Duan, Feng & Wang, Ping & Chyang, ChienSong, 2018. "Biochar contribution in biomass reburning technology and transformation mechanism of its nitrogen foundational groups at different oxygen contents," Energy, Elsevier, vol. 155(C), pages 272-280.
    • Handle: RePEc:eee:energy:v:155:y:2018:i:c:p:272-280
    DOI: 10.1016/j.energy.2018.05.030
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    References listed on IDEAS

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    1. Hongfang Chen & Yin Wang & Guangwen Xu & Kunio Yoshikawa, 2012. "Fuel-N Evolution during the Pyrolysis of Industrial Biomass Wastes with High Nitrogen Content," Energies, MDPI, vol. 5(12), pages 1-21, December.
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    Cited by:

    1. Songshan Cao & Yuyi Liu & Zhi Li & Feng Duan & Lihui Zhang & Jun Cao & Xiaojun Yang, 2020. "A thermochemical reaction and kinetic characteristic study of municipal sludge in the atmosphere of treated flue gas from calcium looping (Ca‐L)," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 10(5), pages 1050-1062, October.
    2. Costa, Michela & Curcio, Christian & Piazzullo, Daniele & Rocco, Vittorio & Tuccillo, Raffaele, 2018. "RDF incineration modelling trough thermo-chemical conversion and gaseous combustion coupling," Energy, Elsevier, vol. 161(C), pages 974-987.

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