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<p>The importance of alternative fuels with better performance and lower emissions has grown significantly. The thermochemical conversion of wastes provides a sustainable solution for the growing energy concern. The study has explored the co-pyrolysis of waste vegetable oil (WVO) and recycled high-density polyethylene (RHDPE) in a fixed bed reactor at a temperature of 500&#xa0;°C, examining the effects of varying WVO and RHDPE ratios. The oils demonstrated diesel-like characteristics, including low specific gravity (ranging from 0.759 to 0.848&#xa0;kg m<sup>−3</sup>), high heating content (42.73–46.55&#xa0;MJ kg<sup>−1</sup>), lower O<sub>2</sub> content (1.32%), and an absence of sulfur. Additional assessments involved testing various co-pyrolysis oil and diesel blends (P10D90, P20D80, P30P70) in the CI engine to record its performance, combustion, and emissions under different load conditions. The P10D90 blend showed improved engine efficiency, increasing from 26.1 to 27.1% at high load, and resulted in decreased emissions of hydrocarbons (HC), smoke, and carbon monoxide. However, nitrogen oxide emissions increased by 11.03%. Interestingly, blends with higher percentages of co-pyrolysis oil led to reductions in oxides of nitrogen, although hydrocarbons, carbon monoxide, and smoke emissions showed slight increases. Despite these increases, emissions were still lower than those from pure diesel (D100) operation, indicating that co-pyrolysis oil blends showcased potential for reducing fossil fuel consumption while preserving engine performance.</p>

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Performance and combustion assessment of CI engine fueled with waste co-pyrolysis oil

  • 期刊论文

  • 发表日期：

    2025年2月27日

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  • Divyansh Singh,
  • Abhishek Paul

摘要

The importance of alternative fuels with better performance and lower emissions has grown significantly. The thermochemical conversion of wastes provides a sustainable solution for the growing energy concern. The study has explored the co-pyrolysis of waste vegetable oil (WVO) and recycled high-density polyethylene (RHDPE) in a fixed bed reactor at a temperature of 500 °C, examining the effects of varying WVO and RHDPE ratios. The oils demonstrated diesel-like characteristics, including low specific gravity (ranging from 0.759 to 0.848 kg m−3), high heating content (42.73–46.55 MJ kg−1), lower O2 content (1.32%), and an absence of sulfur. Additional assessments involved testing various co-pyrolysis oil and diesel blends (P10D90, P20D80, P30P70) in the CI engine to record its performance, combustion, and emissions under different load conditions. The P10D90 blend showed improved engine efficiency, increasing from 26.1 to 27.1% at high load, and resulted in decreased emissions of hydrocarbons (HC), smoke, and carbon monoxide. However, nitrogen oxide emissions increased by 11.03%. Interestingly, blends with higher percentages of co-pyrolysis oil led to reductions in oxides of nitrogen, although hydrocarbons, carbon monoxide, and smoke emissions showed slight increases. Despite these increases, emissions were still lower than those from pure diesel (D100) operation, indicating that co-pyrolysis oil blends showcased potential for reducing fossil fuel consumption while preserving engine performance.