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Co-Pyrolysis of Sewage Sludge, Two-Component Special Municipal Waste and Plastic Waste

Author

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  • Szabina Tomasek

    (Faculty of Engineering, Research Centre of Biochemical, Environmental and Chemical Engineering, Department of MOL Hydrocarbon and Coal Processing, University of Pannonia, Egyetem utca 10, H-8200 Veszprém, Hungary)

  • Norbert Miskolczi

    (Faculty of Engineering, Research Centre of Biochemical, Environmental and Chemical Engineering, Department of MOL Hydrocarbon and Coal Processing, University of Pannonia, Egyetem utca 10, H-8200 Veszprém, Hungary)

Abstract

In this study, the co-pyrolysis of sewage sludge (SS), two-component special municipal waste (SMW) and plastic waste (Plastic) was studied using thermogravimetric equipment and a scaled-up tubular reactor. During the experiments, the effects of the raw material composition and pyrolysis temperature on the decomposition processes, the product yields and compositions were investigated. It was found that co-pyrolysis was a series of complex reactions and resulted in more volatile and lower residue yield than the pyrolysis of the individual raw materials. In some cases (e.g., 25%SMW + 75%Plastic, 25%SS + 75%Plastic, 50%SS + 50%Plastic blends), it also caused a higher synthesis gas yield and H 2 /CO ratio. During the thermogravimetric analysis, the beneficial effects occurred at lower temperatures, but in the scaled-up experiments, these effects only prevailed at 900 °C as a result of the larger amount of raw materials and the worse heat transfer. The produced gases can be characterized by a lower heating value of 17.3–35 MJ/Nm 3 . Therefore, they can be used for energetic purposes; however, before chemical use, further quality improvement is needed due to the lower H 2 /CO ratios.

Suggested Citation

  • Szabina Tomasek & Norbert Miskolczi, 2024. "Co-Pyrolysis of Sewage Sludge, Two-Component Special Municipal Waste and Plastic Waste," Energies, MDPI, vol. 17(15), pages 1-15, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:15:p:3696-:d:1443812
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    References listed on IDEAS

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    1. Umana, Blessing & Shoaib, Abeer & Zhang, Nan & Smith, Robin, 2014. "Integrating hydroprocessors in refinery hydrogen network optimisation," Applied Energy, Elsevier, vol. 133(C), pages 169-182.
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