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Kinetic studies of dehydration, pyrolysis and combustion of paper sludge

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  • Yu, Yong Ho
  • Kim, Sang Done
  • Lee, Jong Min
  • Lee, Keun Hoo

Abstract

The reaction kinetics of drying, pyrolysis and combustion of paper sludge have been determined in a thermogravimetric analyzer (TGA). The effects of heating rate (5–30 K min−1) and sample weight (10–50 mg) on drying and pyrolysis of paper sludge have been determined. The kinetic parameters of char combustion are determined at the isothermal conditions (723–1173 K). For dehydration, pyrolysis and combustion of paper sludge, temperature can be divided into drying (−470 K), pyrolysis [low (470–660 K), medium (660–855 K)] and combustion (>855 K) ranges. From the kinetic parameters (frequency factor and activation energy) of water decomposition, two major degradable compounds are found and the experimental thermogravimetric curves predicted by those parameters. For char combustion, the reaction order is found to be unity. The char combustion is well expressed by the shrinking core model with chemical reaction controlling and the activation energy is changed from 24.3 to 10.14 kJ mol−1 K−1 at 873 K.

Suggested Citation

  • Yu, Yong Ho & Kim, Sang Done & Lee, Jong Min & Lee, Keun Hoo, 2002. "Kinetic studies of dehydration, pyrolysis and combustion of paper sludge," Energy, Elsevier, vol. 27(5), pages 457-469.
  • Handle: RePEc:eee:energy:v:27:y:2002:i:5:p:457-469
    DOI: 10.1016/S0360-5442(01)00097-4
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    References listed on IDEAS

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    1. Lee, Jong Min & Kim, Yong Jeon & Lee, Woon Jae & Kim, Sang Done, 1998. "Coal-gasification kinetics derived from pyrolysis in a fluidized-bed reactor," Energy, Elsevier, vol. 23(6), pages 475-488.
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    1. Han, Xiaoqu & Liu, Ming & Wang, Jinshi & Yan, Junjie & Liu, Jiping & Xiao, Feng, 2014. "Simulation study on lignite-fired power system integrated with flue gas drying and waste heat recovery – Performances under variable power loads coupled with off-design parameters," Energy, Elsevier, vol. 76(C), pages 406-418.
    2. Liu, Ming & Yan, JunJie & Chong, DaoTong & Liu, JiPing & Wang, JinShi, 2013. "Thermodynamic analysis of pre-drying methods for pre-dried lignite-fired power plant," Energy, Elsevier, vol. 49(C), pages 107-118.
    3. Gil, M.V. & Riaza, J. & Álvarez, L. & Pevida, C. & Pis, J.J. & Rubiera, F., 2012. "Kinetic models for the oxy-fuel combustion of coal and coal/biomass blend chars obtained in N2 and CO2 atmospheres," Energy, Elsevier, vol. 48(1), pages 510-518.
    4. Wang, Shule & Wen, Yuming & Hammarström, Henry & Jönsson, Pär Göran & Yang, Weihong, 2021. "Pyrolysis behaviour, kinetics and thermodynamic data of hydrothermal carbonization–Treated pulp and paper mill sludge," Renewable Energy, Elsevier, vol. 177(C), pages 1282-1292.
    5. Jianxiang Guo & Guohui Lei, 2020. "Application of ultrasound to enhance the silt drying process: An experimental study," PLOS ONE, Public Library of Science, vol. 15(7), pages 1-14, July.
    6. Yanfen, Liao & Xiaoqian, Ma, 2010. "Thermogravimetric analysis of the co-combustion of coal and paper mill sludge," Applied Energy, Elsevier, vol. 87(11), pages 3526-3532, November.
    7. Ma, Rui & Sun, Shichang & Geng, Haihong & Fang, Lin & Zhang, Peixin & Zhang, Xianghua, 2018. "Study on the characteristics of microwave pyrolysis of high-ash sludge, including the products, yields, and energy recovery efficiencies," Energy, Elsevier, vol. 144(C), pages 515-525.
    8. 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.
    9. Manara, P. & Zabaniotou, A., 2012. "Towards sewage sludge based biofuels via thermochemical conversion – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 2566-2582.
    10. Chen, Lichun & Wen, Chang & Wang, Wenyu & Liu, Tianyu & Liu, Enze & Liu, Haowen & Li, Zexin, 2020. "Combustion behaviour of biochars thermally pretreated via torrefaction, slow pyrolysis, or hydrothermal carbonisation and co-fired with pulverised coal," Renewable Energy, Elsevier, vol. 161(C), pages 867-877.

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