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Co-pyrolysis kinetic characteristics of wheat straw and hydrogen rich plastics based on TG-FTIR and Py-GC/MS

Author

Listed:
  • Guo, Na
  • Wang, Zhiwei
  • Chen, Gaofeng
  • Zhang, Mengju
  • Zhu, Huina
  • Wang, Qun
  • Guo, Shuaihua
  • Su, Feihong
  • You, Zhenxiang
  • Yang, Shuhua
  • Du, Zhimin
  • Liu, Yongzhi
  • Lei, Tingzhou

Abstract

The pyrolysis of various plastics generates distinct reaction intermediates, influencing co-pyrolysis with biomass feedstocks in varied manners. This work investigated the co-pyrolysis characteristics of hydrogen-rich plastics (PP, PS, PE) and wheat straw (WS) at 600 °C. The experimental results indicated that the co-pyrolysis of WS with hydrogen-rich plastics increased the release of alkenes and decreased the release of oxy-organics and polycyclic aromatic hydrocarbons (PAHs). The synergistic mechanism of co-pyrolysis was closely related to the type of plastics used. FTIR analysis revealed that the co-pyrolysis products of WS and plastics included hydrocarbons, aldehydes, ketones, alcohols, acids, phenols, and H2O. Co-pyrolysis effectively enhanced the proportion of combustible gas. The co-pyrolysis of WS and PP increased the yield of MAHs and alcohols. The co-pyrolysis of WS and PS decreased the formation of PAHs and acids. The co-pyrolysis of WS and PE reduced the yield of N-compounds and acids. Compared to single pyrolysis, the product yields from co-pyrolysis of WS and hydrogen-rich plastics were significantly enhanced, especially alkenes and alcohols. The synergistic interaction between WS and PP, PS, PE contributed to enhancing the quality of co-pyrolysis bio-oil. Additionally, the research also provided a theoretical foundation for the efficient co-conversion of biomass and plastics.

Suggested Citation

  • Guo, Na & Wang, Zhiwei & Chen, Gaofeng & Zhang, Mengju & Zhu, Huina & Wang, Qun & Guo, Shuaihua & Su, Feihong & You, Zhenxiang & Yang, Shuhua & Du, Zhimin & Liu, Yongzhi & Lei, Tingzhou, 2024. "Co-pyrolysis kinetic characteristics of wheat straw and hydrogen rich plastics based on TG-FTIR and Py-GC/MS," Energy, Elsevier, vol. 312(C).
    • Handle: RePEc:eee:energy:v:312:y:2024:i:c:s0360544224034613
    DOI: 10.1016/j.energy.2024.133683
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