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The work presents a comprehensive thermal behavior analysis during fast pyrolysis of polyethylene terephthalate (PET) and peanut shell (PS), as the co-pyrolysis process represents a promising approach to producing valuable chemicals. The study further investigates the effect of blending ratio on kinetic parameters and bio-oil obtained under a higher heating rate of 500 ℃/min. Thermogravimetry (TG) analysis proved the existence of synergistic effects. The mass loss rate presents a relative increase with PET ratio increase. The comprehensive pyrolysis index (CPI) change for PS/PET blends increased to ~320% when PET ratio increased from 25 wt% to 75 wt%. The average deviation ΔD value of –4.96% was observed for PS75PET25% blend, reflecting the optimal blend ratio during the co-pyrolysis process. The study also highlights the influence of varying blending ratios on bio-oil component selectivity. Furthermore, the presence of PET promoted the synthesis of aromatic oxygenated hydrocarbons in the liquid product while the content of derivatives such as terephthalic and benzoic acids was remarkably increased. Supervised machine learning model based on polynomial regression approach accurately predicted the experimental data and blending ratio influence on the activation energy and overall bio-oil selectivity.

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Fast Pyrolysis of PET Plastic and Peanut Shell: Assessment of Blending Ratio Effect on Synergism

  • 会议论文

  • 发表日期：

    2025年

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  • Shagali Abdulmajid Abdullahi,
  • Haoran Qing,
  • Kai Xu,
  • Yi Wang,
  • Sheng Su,
  • Jun Xiang,
  • Song Hu

摘要

The work presents a comprehensive thermal behavior analysis during fast pyrolysis of polyethylene terephthalate (PET) and peanut shell (PS), as the co-pyrolysis process represents a promising approach to producing valuable chemicals. The study further investigates the effect of blending ratio on kinetic parameters and bio-oil obtained under a higher heating rate of 500 ℃/min. Thermogravimetry (TG) analysis proved the existence of synergistic effects. The mass loss rate presents a relative increase with PET ratio increase. The comprehensive pyrolysis index (CPI) change for PS/PET blends increased to ~320% when PET ratio increased from 25 wt% to 75 wt%. The average deviation ΔD value of –4.96% was observed for PS75PET25% blend, reflecting the optimal blend ratio during the co-pyrolysis process. The study also highlights the influence of varying blending ratios on bio-oil component selectivity. Furthermore, the presence of PET promoted the synthesis of aromatic oxygenated hydrocarbons in the liquid product while the content of derivatives such as terephthalic and benzoic acids was remarkably increased. Supervised machine learning model based on polynomial regression approach accurately predicted the experimental data and blending ratio influence on the activation energy and overall bio-oil selectivity.