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Fast pyrolysis of pulp and paper mill sludge in a bubbling fluidized bed: Unlocking energy potential through insights into tar formation and combustion characteristics

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Název: Fast pyrolysis of pulp and paper mill sludge in a bubbling fluidized bed: Unlocking energy potential through insights into tar formation and combustion characteristics
Autoři: Chen, Fangjun, Ren, Guanlong, Long, Hua, Shahzad Khurram, Muhammad, Lang, Lin, Ström, Henrik, 1981, Vladimirovich, Vasilevich Sergey, Oboirien, Bilainu Obozokhai, Xiong, Qingang
Zdroj: Renewable Energy. 256
Témata: fast pyrolysis, bubbling fluidized bed, pulp and paper mill sludge, tar, combustion characteristics
Popis: The fast pyrolysis of pulp and paper mill sludge (PPMS) in a bubbling fluidized bed (BFB) is a promising solution for converting PPMS into liquid fuels or chemicals for waste utilization but lacks sufficient understanding. This study comprehensively explored the effects of bed temperature, fluidization number, and particle size on the fast pyrolysis of deinking sludge (PPMS-DS) and sewage sludge (PPMS-SS) from a wastepaper pulp and paper mill, unveiling for the first time the combustion behavior of PPMS tar, gas release patterns, and reaction kinetics. Results revealed that bed temperature was the most critical factor influencing tar yield, followed by the fluidization number. Under optimal conditions, the tar yields were 61.49 wt.% for PPMS-DS and 66.13 wt.% (dry ash-free basis) for PPMS-SS. PPMS-DS tar exhibited better fuel properties, with a higher heating value (38.41 MJ/kg) and lower oxygen content (7.08 wt.%). The combustion of PPMS tar involved three steps: low-temperature oxidation (LTO), fuel deposition (FD), and high-temperature oxidation (HTO). The kinetic differences among the reaction steps were clear, with LTO and FD having the respective lowest and highest apparent activation energies. This research supports the development of efficient and sustainable PPMS-to-energy technologies, with significant potential for large-scale industrial applications.
Přístupová URL adresa: https://research.chalmers.se/publication/548399
https://research.chalmers.se/publication/548510
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Fast pyrolysis of pulp and paper mill sludge in a bubbling fluidized bed: Unlocking energy potential through insights into tar formation and combustion characteristics
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Chen%2C+Fangjun%22">Chen, Fangjun</searchLink><br /><searchLink fieldCode="AR" term="%22Ren%2C+Guanlong%22">Ren, Guanlong</searchLink><br /><searchLink fieldCode="AR" term="%22Long%2C+Hua%22">Long, Hua</searchLink><br /><searchLink fieldCode="AR" term="%22Shahzad+Khurram%2C+Muhammad%22">Shahzad Khurram, Muhammad</searchLink><br /><searchLink fieldCode="AR" term="%22Lang%2C+Lin%22">Lang, Lin</searchLink><br /><searchLink fieldCode="AR" term="%22Ström%2C+Henrik%22">Ström, Henrik</searchLink>, 1981<br /><searchLink fieldCode="AR" term="%22Vladimirovich%2C+Vasilevich+Sergey%22">Vladimirovich, Vasilevich Sergey</searchLink><br /><searchLink fieldCode="AR" term="%22Oboirien%2C+Bilainu+Obozokhai%22">Oboirien, Bilainu Obozokhai</searchLink><br /><searchLink fieldCode="AR" term="%22Xiong%2C+Qingang%22">Xiong, Qingang</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <i>Renewable Energy</i>. 256
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22fast+pyrolysis%22">fast pyrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22bubbling+fluidized+bed%22">bubbling fluidized bed</searchLink><br /><searchLink fieldCode="DE" term="%22pulp+and+paper+mill+sludge%22">pulp and paper mill sludge</searchLink><br /><searchLink fieldCode="DE" term="%22tar%22">tar</searchLink><br /><searchLink fieldCode="DE" term="%22combustion+characteristics%22">combustion characteristics</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: The fast pyrolysis of pulp and paper mill sludge (PPMS) in a bubbling fluidized bed (BFB) is a promising solution for converting PPMS into liquid fuels or chemicals for waste utilization but lacks sufficient understanding. This study comprehensively explored the effects of bed temperature, fluidization number, and particle size on the fast pyrolysis of deinking sludge (PPMS-DS) and sewage sludge (PPMS-SS) from a wastepaper pulp and paper mill, unveiling for the first time the combustion behavior of PPMS tar, gas release patterns, and reaction kinetics. Results revealed that bed temperature was the most critical factor influencing tar yield, followed by the fluidization number. Under optimal conditions, the tar yields were 61.49 wt.% for PPMS-DS and 66.13 wt.% (dry ash-free basis) for PPMS-SS. PPMS-DS tar exhibited better fuel properties, with a higher heating value (38.41 MJ/kg) and lower oxygen content (7.08 wt.%). The combustion of PPMS tar involved three steps: low-temperature oxidation (LTO), fuel deposition (FD), and high-temperature oxidation (HTO). The kinetic differences among the reaction steps were clear, with LTO and FD having the respective lowest and highest apparent activation energies. This research supports the development of efficient and sustainable PPMS-to-energy technologies, with significant potential for large-scale industrial applications.
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  Label: Access URL
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      – Type: doi
        Value: 10.1016/j.renene.2025.124476
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      – Text: English
    Subjects:
      – SubjectFull: fast pyrolysis
        Type: general
      – SubjectFull: bubbling fluidized bed
        Type: general
      – SubjectFull: pulp and paper mill sludge
        Type: general
      – SubjectFull: tar
        Type: general
      – SubjectFull: combustion characteristics
        Type: general
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      – TitleFull: Fast pyrolysis of pulp and paper mill sludge in a bubbling fluidized bed: Unlocking energy potential through insights into tar formation and combustion characteristics
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            NameFull: Chen, Fangjun
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            NameFull: Ren, Guanlong
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            – D: 01
              M: 01
              Type: published
              Y: 2026
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              Value: 256
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