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Co-Combustion Behavior of Paper Sludge Hydrochar and Pulverized Coal: Low Rank Coal and Its Product by Hydrothermal Carbonization

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Listed:
  • Buxin Su

    (Metallurgical Industry Press, Beijing 100009, China)

  • Guangwei Wang

    (State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China)

  • Renguo Li

    (State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China)

  • Kun Xu

    (State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China)

  • Junyi Wu

    (State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China)

  • Desheng Li

    (State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China)

  • Jiawen Liu

    (State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China)

Abstract

In this paper, the combustion behavior of low rank coal and its product after hydrothermal carbonization with paper sludge hydrochar were studied. The Raman technique was used to compare the structural differences between raw coal and the product. Thermogravimetric analysis was employed to conduct experiments of single sample and their mixtures with different proportions at a heating rate of 20 °C/min, the activation energy of chemical reactions was calculated. The results showed that upgraded product had higher carbon ordering degree than raw coal and the ignition temperature and burnout temperature of the product were advanced. Compared with raw coal, the combustion characteristic parameters C and S of the product were higher, indicating that its combustibility was better. As for the mixture, when the paper sludge hydrochar ratio was not more than 10%, the mixed fuel combustion curve was still similar to coal curve. After the paper sludge hydrochar ratio exceeded 10%, the activation energy of the mixed combustion reaction of paper sludge hydrochar and upgraded coal was lower than that of raw coal and paper sludge hydrochar. These results indicated that the mixture of upgraded coal and paper sludge hydrochar as mixed fuel was a better option.

Suggested Citation

  • Buxin Su & Guangwei Wang & Renguo Li & Kun Xu & Junyi Wu & Desheng Li & Jiawen Liu, 2022. "Co-Combustion Behavior of Paper Sludge Hydrochar and Pulverized Coal: Low Rank Coal and Its Product by Hydrothermal Carbonization," Energies, MDPI, vol. 15(15), pages 1-12, August.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5619-:d:878830
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    References listed on IDEAS

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    4. Coimbra, Ricardo N. & Paniagua, Sergio & Escapa, Carla & Calvo, Luis F. & Otero, Marta, 2015. "Combustion of primary and secondary pulp mill sludge and their respective blends with coal: A thermogravimetric assessment," Renewable Energy, Elsevier, vol. 83(C), pages 1050-1058.
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