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Residual moisture in the sewage sludge feed significantly affects the pyrolysis process: Simulation of continuous process in a batch reactor.
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SYSNO ASEP 0548934 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Residual moisture in the sewage sludge feed significantly affects the pyrolysis process: Simulation of continuous process in a batch reactor. Author(s) Moško, Jaroslav (UCHP-M) RID, ORCID, SAI
Jeremiáš, Michal (UFP-V) ORCID
Skoblia, S. (CZ)
Beňo, Z. (CZ)
Sikarwar, Vineet Singh (UFP-V) ORCID
Hušek, Matěj (UCHP-M) ORCID, RID, SAI
Wang, H. (CN)
Pohořelý, Michael (UCHP-M) RID, ORCID, SAIArticle number 105387 Source Title Journal of Analytical and Applied Pyrolysis. - : Elsevier - ISSN 0165-2370
Roč. 161, JAN 2022 (2022)Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords sewage sludge ; pyrolysis ; gasification ; gas composition Subject RIV JE - Non-nuclear Energetics, Energy Consumption ; Use OECD category Energy and fuels Subject RIV - cooperation Institute of Plasma Physics - Non-nuclear Energetics, Energy Consumption ; Use R&D Projects QK21020022 GA MZe - Ministry of Agriculture (MZe) Method of publishing Open access with time embargo (01.02.2024) Institutional support UCHP-M - RVO:67985858 ; UFP-V - RVO:61389021 UT WOS 000729340900003 EID SCOPUS 85120071931 DOI 10.1016/j.jaap.2021.105387 Annotation In the experiments presented within this manuscript, we allowed the residual moisture typical for industrially dried sludge (10 wt%) to react within the pyrolysis process by incorporating it into the carrier gas (consisting finally of 70 vol% steam and 30 vol% He). This steam reacted within the pyrolysis process at temperatures 400–800 °C in a fixed-bed reactor. The results were thoroughly compared with the results of a previous study with pure helium atmosphere, within the same experimental setup. When comparing the experiments with and without steam in the carrier gas, a significant difference in the distribution and properties of the products was observed especially at temperatures above 600 °C. The use of steam as a carrier gas (instead of inert gas) resulted in a remarkably higher pyrolysis gas yield. The pyrolysis gas constituted of almost double the content of hydrogen with a decrease in the yield of the sludge-char. Moreover, particular changes in sludge-char properties were observed. Not only the steam enhanced textural properties of the sludge-chars, especially the specific surface area and the total specific pore volume, but it also resulted in a significantly lower content of C, H, N and S and lower heating value of the sludge-char. These parameters can be decisive in case of sludge-char utilization ranging from agronomic through adsorbents to fuel use. Our approach provides a simplified way to better predict the distribution and properties of pyrolysis products in large-scale units. This can be time and money saving and is crucial to make decisions about the applicability of pyrolysis technology to specific sewage sludge products. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2023 Electronic address http://hdl.handle.net/11104/0324977
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