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The Proof-of-Concept: The Transformation of Naphthalene and Its Derivatives into Decalin and Its Derivatives during Thermochemical Processing of Sewage Sludge

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Department of Chemistry, Wrocław University of Environmental and Life Sciences, 50-375 Wrocław, Poland
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Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA
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Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, 50-375 Wrocław, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Le Zhang
Energies 2021, 14(20), 6479; https://doi.org/10.3390/en14206479
Received: 1 September 2021 / Revised: 2 October 2021 / Accepted: 4 October 2021 / Published: 10 October 2021
One solution for sewage sludge (SS) management is thermochemical treatment due to torrefaction and pyrolysis with biochar production. SS biochar may contain toxic volatile organic compounds (VOCs) and polyaromatic hydrocarbons (PAHs). This study aimed to determine the process temperature’s influence on the qualitative PAHs emission from SS-biochar and the transformation of PAHs contained in SS. SS was torrefied/pyrolyzed under temperatures 200–600 °C with 1 h residence time. The headspace solid-phase microextraction (SPME) combined with gas chromatography and mass spectrometry (HS-SPME-GC-MS) analytical procedure of VOCs and PAHs emission was applied. The highest abundance of numerous VOCs was found for torrefaction ranges of temperature. The increase of temperatures to the pyrolytic range decreased the presence of VOCs and PAHs in biochar. The most common VOCs emitted from thermally processed SS were acetone, 2-methylfuran, 2-butanone, 3-metylbutanal, benzene, decalin, and acetic acid. The naphthalene present in SS converted to decalin (and other decalin derivatives), which may lead to SS biochar being considered hazardous material. View Full-Text
Keywords: biochar; PAHs; municipal waste; pyrolysis; torrefaction; VOCs; waste management biochar; PAHs; municipal waste; pyrolysis; torrefaction; VOCs; waste management
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MDPI and ACS Style

Łyczko, J.; Koziel, J.A.; Banik, C.; Białowiec, A. The Proof-of-Concept: The Transformation of Naphthalene and Its Derivatives into Decalin and Its Derivatives during Thermochemical Processing of Sewage Sludge. Energies 2021, 14, 6479. https://doi.org/10.3390/en14206479

AMA Style

Łyczko J, Koziel JA, Banik C, Białowiec A. The Proof-of-Concept: The Transformation of Naphthalene and Its Derivatives into Decalin and Its Derivatives during Thermochemical Processing of Sewage Sludge. Energies. 2021; 14(20):6479. https://doi.org/10.3390/en14206479

Chicago/Turabian Style

Łyczko, Jacek, Jacek A. Koziel, Chumki Banik, and Andrzej Białowiec. 2021. "The Proof-of-Concept: The Transformation of Naphthalene and Its Derivatives into Decalin and Its Derivatives during Thermochemical Processing of Sewage Sludge" Energies 14, no. 20: 6479. https://doi.org/10.3390/en14206479

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