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Updated: Dec 24, 2025

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Alternative component containing diesel fuel from different waste sources.

O Tóth1, A Holló2, J Hancsók1

  • 1Department of MOL Hydrocarbon and Coal Processing, University of Pannonia, 10 Egyetem Street, H-8200, Veszprém, Hungary.

Journal of Environmental Management
|April 16, 2020
PubMed
Summary

This study explored converting waste polypropylene and fatty acids into high-quality diesel fuel by co-processing them with unrefined gas oils. The resulting alternative fuel demonstrated superior performance and environmental benefits compared to conventional diesel.

Keywords:
Co-hydrogenationPolypropylene crackingRenewable biofuelWaste fatty acid

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Area of Science:

  • Chemical Engineering
  • Sustainable Fuels
  • Catalysis

Background:

  • Waste streams from vegetable oil, animal fat purification, and paper production contain high fatty acid content.
  • These waste fractions, along with thermal cracked polypropylene, can be converted into valuable hydrocarbons.
  • Co-processing these waste materials with unrefined gas oils offers a promising route for alternative fuel production.

Purpose of the Study:

  • To investigate the co-processing of unrefined gas oil, waste polypropylene cracked fraction, and waste fatty acid mixtures.
  • To produce high-quality diesel fuel blending components.
  • To study the reaction mechanisms and interactions between the different feedstock components.

Main Methods:

  • Catalytic conversion of a feedstock mixture using a commercial sulphided nickel-molybdenum-alumina catalyst.
  • Varied feedstock compositions: 20 wt% polypropylene cracked fraction and 10, 20, or 30 wt% fatty acid mixture.
  • Optimization of process parameters, including temperature and liquid hourly space velocity.

Main Results:

  • Identified optimal conditions for producing high-quality diesel fuel components (10 wt% fatty acid waste, 360°C, 1.0 h⁻¹ LHSV).
  • The synthesized fuel exhibited superior performance properties compared to conventional diesel fuels.
  • Demonstrated the feasibility of co-processing diverse waste streams into valuable fuel products.

Conclusions:

  • Co-processing waste polypropylene and fatty acid mixtures with unrefined gas oils is an effective method for producing advanced diesel blending components.
  • The resulting alternative fuels offer enhanced performance and reduced pollutant emissions, promoting environmental sustainability.
  • This approach provides a viable pathway for valorizing industrial waste streams into high-value energy products.