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Detailed Analysis of Sewage Sludge Pyrolysis Gas: Effect of Pyrolysis Temperature

Author

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  • Jaroslav Moško

    (Faculty of Environmental Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
    Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 16502 Prague, Czech Republic
    Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium)

  • Michael Pohořelý

    (Faculty of Environmental Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
    Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 16502 Prague, Czech Republic)

  • Siarhei Skoblia

    (Faculty of Environmental Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic)

  • Zdeněk Beňo

    (Faculty of Environmental Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic)

  • Michal Jeremiáš

    (Faculty of Environmental Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
    Institute of Plasma Physics of the Czech Academy of Sciences, v. v. i., Za Slovankou 1782/3, 182 00 Prague, Czech Republic)

Abstract

Conventional methods of sewage sludge disposal are often limited by their environmental impact and economic demands. Pyrolysis has been studied as a viable method for sewage sludge disposal and transformation into usable products. Pyrolytic products may have various uses, and their complex characteristics shall be described to assess their potential for safe utilization. Here, we studied slow pyrolysis of stabilized sewage sludge in a fixed bed reactor at 400–800 °C to describe the composition of the pyrolysis gas and the condensate fraction. We found that condensate elemental composition was practically independent of pyrolysis temperature. On the other hand, the composition of the pyrolysis gas was strongly temperature-dependent regarding both the share of major components (H 2 , CO, CO 2 , CH 4 ) and C 2 –C 6 hydrocarbons speciation (which as a sum attributed to 7–9 vol. % of the gas). The increase in pyrolysis temperature also resulted in increasing the N 2 content of the gas, whereas the sulfur containing gas compounds were substantially diluted in the increasing gas volume.

Suggested Citation

  • Jaroslav Moško & Michael Pohořelý & Siarhei Skoblia & Zdeněk Beňo & Michal Jeremiáš, 2020. "Detailed Analysis of Sewage Sludge Pyrolysis Gas: Effect of Pyrolysis Temperature," Energies, MDPI, vol. 13(16), pages 1-12, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:16:p:4087-:d:395649
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    References listed on IDEAS

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    1. Zheng, Anqing & Li, Luwei & Tippayawong, Nakorn & Huang, Zhen & Zhao, Kun & Wei, Guoqiang & Zhao, Zengli & Li, Haibin, 2020. "Reducing emission of NOx and SOx precursors while enhancing char production from pyrolysis of sewage sludge by torrefaction pretreatment," Energy, Elsevier, vol. 192(C).
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    Cited by:

    1. Norbert Miskolczi & Szabina Tomasek, 2022. "Investigation of Pyrolysis Behavior of Sewage Sludge by Thermogravimetric Analysis Coupled with Fourier Transform Infrared Spectrometry Using Different Heating Rates," Energies, MDPI, vol. 15(14), pages 1-18, July.
    2. Anna Tsybina & Christoph Wünsch & Irina Glushankova & Anna Arduanova, 2023. "Development and Substantiation of Approaches to the Management of Sewage Sludge of Different Storage Periods," Energies, MDPI, vol. 16(15), pages 1-16, July.

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