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<p>This study focuses on producing hydrocarbon-based liquid fuels through a catalytic thermochemical process utilizing high-density polyethylene (HDPE) plastic waste and rice husk biomass (RH), with an emphasis on thermogravimetric analysis and gas chromatography-mass spectrometry (GC–MS). Additionally, efforts were made to investigate the kinetic characteristics of the blends at different conversion rates employing the KAS and OFW methodologies. The analysis revealed that the activation energy of HDPE:RH (1:1, wt%) was measured at 126.4&#xa0;kJ/mol and 114.9&#xa0;kJ/mol. The dolomite catalyst was calcined at 900&#xa0;°C to increase its activity as a catalyst. The used dolomite catalyst was calcined at 900&#xa0;°C and had a surface area (S<sub>BET</sub>) of 7.45 m<sup>2</sup>/g, with average particle sizes of CaO and MgO of 77.8&#xa0;nm and 43.7&#xa0;nm. Results showed the catalytic co-pyrolysis of HDPE and RH enhanced the fuel properties by 15–20% that were performed at 500&#xa0;°C at 10&#xa0;°C/min. The aniline point was found to be 55.4&#xa0;g/cm<sup>3</sup>, the fire point and the flash point were 52.2&#xa0;°C and 49.6&#xa0;°C, respectively, while the cetane number was determined to be 51.3. A 72.4% increase in carbon content, 12.26% increase in hydrogen content, and decrease in the oxygen extracted from the bio-oil by 17% were also observed.&#xa0;</p> Graphical Abstract <p></p>

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Catalytic co-pyrolysis of rice husk and high-density polyethylene using dolomite for enhancement of bio-oil production and quality

  • 期刊论文

  • 发表日期：

    2025年6月14日

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  • Divya Bisen,
  • Rahul Lanjewar,
  • Ashish Pratap Singh Chouhan,
  • Manish Pant,
  • Sankar Chakma

摘要

This study focuses on producing hydrocarbon-based liquid fuels through a catalytic thermochemical process utilizing high-density polyethylene (HDPE) plastic waste and rice husk biomass (RH), with an emphasis on thermogravimetric analysis and gas chromatography-mass spectrometry (GC–MS). Additionally, efforts were made to investigate the kinetic characteristics of the blends at different conversion rates employing the KAS and OFW methodologies. The analysis revealed that the activation energy of HDPE:RH (1:1, wt%) was measured at 126.4 kJ/mol and 114.9 kJ/mol. The dolomite catalyst was calcined at 900 °C to increase its activity as a catalyst. The used dolomite catalyst was calcined at 900 °C and had a surface area (SBET) of 7.45 m2/g, with average particle sizes of CaO and MgO of 77.8 nm and 43.7 nm. Results showed the catalytic co-pyrolysis of HDPE and RH enhanced the fuel properties by 15–20% that were performed at 500 °C at 10 °C/min. The aniline point was found to be 55.4 g/cm3, the fire point and the flash point were 52.2 °C and 49.6 °C, respectively, while the cetane number was determined to be 51.3. A 72.4% increase in carbon content, 12.26% increase in hydrogen content, and decrease in the oxygen extracted from the bio-oil by 17% were also observed. 

Graphical Abstract