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<p>In this work, an experimental investigation is performed in order to assess the pressurized co-pyrolysis of olive pomace (OP) and plastic wastes (high-density polyethylene-HDPE). Different operating conditions were evaluated to determine the optimal parameters. In particular, pyrolysis tests were realized at various temperatures (350, 400, 450, 500, 550 and 600&#xa0;°C) and reaction times (30, 45, 60 and 120&#xa0;min). Results show that the interaction between the biomass and the plastic wastes has a significant effect on the final pressurized pyrolysis products. The OP/HDPE blend (1:1) pyrolysis generated more liquid fuel yield than individual components pyrolyzed separately. This result suggests a synergistic effect between OP and HDPE for the liquid fuel production. The maximum oil yield obtained from OP pyrolysis and from HDPE pyrolysis was about 19.6%, 80.2% at 400&#xa0;°C and 500&#xa0;°C respectively. However, this value from the pressurized pyrolysis was assessed to 57.4% at a temperature of 450&#xa0;°C. The optimal residence time for OP and the mixture OP/HDPE (1:1) was 30&#xa0;min, while the optimal residence time for HDPE was 45&#xa0;min. The results of the oils qualitative analyses indicate that adding HDPE into the OP pyrolysis led to a decrease in the oxygen-rich components and a significant rise in the hydrocarbons in the co-pyrolytic oils. This enhancement indicates that the inclusion of HDPE resulted in an upsurge in the hydrogen content while simultaneously causing a reduction in the oxygen content within the pressurized pyrolysis oils. This alteration is expected to yield a product with the potential for improved fuel characteristics.</p> Graphical Abstract <p></p>

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Efficient Biofuel Production from Olive Pomace and Polyethylene Waste Blend via Pressurized Co-Pyrolysis: Optimization and Characterization

  • 期刊论文

  • 发表日期：

    2025年1月18日

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  • Hicham Dahman,
  • Emna Berrich Kilani,
  • Khalifa El Harfi,
  • Khaled Loubar,
  • Mejdi Jeguirim,
  • Salah Jellali,
  • Adil Aboulkas

摘要

In this work, an experimental investigation is performed in order to assess the pressurized co-pyrolysis of olive pomace (OP) and plastic wastes (high-density polyethylene-HDPE). Different operating conditions were evaluated to determine the optimal parameters. In particular, pyrolysis tests were realized at various temperatures (350, 400, 450, 500, 550 and 600 °C) and reaction times (30, 45, 60 and 120 min). Results show that the interaction between the biomass and the plastic wastes has a significant effect on the final pressurized pyrolysis products. The OP/HDPE blend (1:1) pyrolysis generated more liquid fuel yield than individual components pyrolyzed separately. This result suggests a synergistic effect between OP and HDPE for the liquid fuel production. The maximum oil yield obtained from OP pyrolysis and from HDPE pyrolysis was about 19.6%, 80.2% at 400 °C and 500 °C respectively. However, this value from the pressurized pyrolysis was assessed to 57.4% at a temperature of 450 °C. The optimal residence time for OP and the mixture OP/HDPE (1:1) was 30 min, while the optimal residence time for HDPE was 45 min. The results of the oils qualitative analyses indicate that adding HDPE into the OP pyrolysis led to a decrease in the oxygen-rich components and a significant rise in the hydrocarbons in the co-pyrolytic oils. This enhancement indicates that the inclusion of HDPE resulted in an upsurge in the hydrogen content while simultaneously causing a reduction in the oxygen content within the pressurized pyrolysis oils. This alteration is expected to yield a product with the potential for improved fuel characteristics.

Graphical Abstract