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Study on co-pyrolysis synergistic mechanism of seaweed and rice husk by investigation of the characteristics of char/coke

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  • Xu, Shannan
  • Uzoejinwa, Benjamin Bernard
  • Wang, Shuang
  • Hu, Yamin
  • Qian, Lili
  • Liu, Lu
  • Li, Bin
  • He, Zhixia
  • Wang, Qian
  • Abomohra, Abd El-Fatah
  • Li, Chunhou
  • Zhang, Bo

Abstract

This study investigates the characteristics of pyrolysis char/coke and elemental morphological changes on surface of char/coke produced, during co-pyrolysis of seaweed (EN) and rice husk (HU) at various temperatures through XPS, FTIR and SEM analysis methods. Analysis of pyrolysis products including by-products will help to partly explore co-pyrolysis synergistic mechanisms of the seaweed and rice husk. Thus, fast pyrolysis of EN and HU was conducted in a fixed bed reactor. Coke/char from the individual pyrolysis of EN and HU respectively at different temperatures, and those from co-pyrolysis of EN and HU (1:1) at 550 °C, were analyzed. Results revealed that the co-pyrolysis process has synergistic effects. Moreover, the release of nitrogenous substances was found to be inhibited by addition of HU at low temperature (<190 °C) range. It was also observed that co-pyrolysis of EN with HU does not only facilitates pyrolysis of aliphatic CO functional groups at the middle temperature range, but also contributes to the cleavage of ether bonds of some water-soluble polysaccharides at high temperature (320–550 °C) level, hence generating aromatic compounds. Besides, the analysis of pore structures, pore size distributions and fractal dimensions of pyrolysis char/coke also show that the co-pyrolysis process has a synergistic effect.

Suggested Citation

  • Xu, Shannan & Uzoejinwa, Benjamin Bernard & Wang, Shuang & Hu, Yamin & Qian, Lili & Liu, Lu & Li, Bin & He, Zhixia & Wang, Qian & Abomohra, Abd El-Fatah & Li, Chunhou & Zhang, Bo, 2019. "Study on co-pyrolysis synergistic mechanism of seaweed and rice husk by investigation of the characteristics of char/coke," Renewable Energy, Elsevier, vol. 132(C), pages 527-542.
    • Handle: RePEc:eee:renene:v:132:y:2019:i:c:p:527-542
    DOI: 10.1016/j.renene.2018.08.025
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    Cited by:

    1. Badshah, Syed Lal & Shah, Zahir & Francisco Alves, José Luiz & Gomes da Silva, Jean Constantino & Iqbal, Arshad, 2021. "Pyrolysis of the freshwater macroalgae Spirogyra crassa: Evaluating its bioenergy potential using kinetic triplet and thermodynamic parameters," Renewable Energy, Elsevier, vol. 179(C), pages 1169-1178.
    2. Wen, Shaoting & Yan, Youping & Liu, Jingyong & Buyukada, Musa & Evrendilek, Fatih, 2019. "Pyrolysis performance, kinetic, thermodynamic, product and joint optimization analyses of incense sticks in N2 and CO2 atmospheres," Renewable Energy, Elsevier, vol. 141(C), pages 814-827.

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