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Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating
Published on: December 25, 2016
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Effect of hydrotreating on the pyrolysis oil composition: GC-MS studies
Tatiana Bochko1, Andrey Shishov1
1Saint-Petersburg State University, Universitetskaia 7/9, 199304 Saint-Petersburg, Russia. tatibochko@yandex.ru.
Analytical Methods : Advancing Methods and Applications
|January 27, 2026
Summary
Hydrotreating waste tire pyrolysis oil with NiMo/Al2O3 catalysts effectively removes contaminants, producing a cleaner fuel. This method shows superior performance over Pt/Al2O3 for sustainable alternative fuel production.
Area of Science:
- Chemical Engineering
- Materials Science
- Sustainable Energy
Background:
- Waste tire processing presents significant environmental and resource challenges.
- Pyrolysis of waste tires offers a sustainable route to produce fuels, but requires contaminant removal for usability.
- Hydrotreating is a key process for upgrading pyrolysis oil into alternative transportation fuels.
Purpose of the Study:
- To evaluate the efficacy of commercial Pt/Al2O3 and NiMo/Al2O3 catalysts in hydrotreating tire pyrolysis oil.
- To analyze the impact of hydrotreating on the chemical composition of tire pyrolysis oil.
- To compare the performance of NiMo/Al2O3 and Pt/Al2O3 catalysts in removing undesirable compounds.
Main Methods:
- Tire pyrolysis conducted at 500 °C in a nitrogen atmosphere.
- Catalytic hydrotreating performed in a 250 mL reactor at 250-350 °C and 6.5 MPa hydrogen pressure.
- Pyrolysis oil analyzed using GC-MS after a multi-step extraction and oleum treatment sample preparation.
Main Results:
- NiMo/Al2O3 catalyst effectively removed unsaturated hydrocarbons and water-soluble compounds, outperforming Pt/Al2O3.
- NiMo/Al2O3 demonstrated superior efficiency in reducing polycyclic aromatic hydrocarbons (PAHs), sulfur, nitrogen, and oxygen content.
- Hydrotreated diesel fraction met key specifications but residual PAH and sulfur exceeded commercial standards.
Conclusions:
- NiMo/Al2O3 is a more effective catalyst than Pt/Al2O3 for hydrotreating tire pyrolysis oil.
- Hydrotreating significantly improves the quality of tire pyrolysis oil for potential fuel applications.
- Further optimization is needed to meet stringent commercial diesel standards for sulfur and PAH content.
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