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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

The management of municipal and industrial organic solid wastes has become one of the most critical environmental problems in modern societies. Nowadays, commonly used management techniques are incineration, composting, and landfilling, with the former one being the most common for hazardous organic wastes. An alternative eco-friendly method that offers a sustainable and economically viable solution for hazardous wastes management is fast pyrolysis, being one of the most important thermochemical processes in the petrochemical and biomass valorization industry. The objective of this work was to study the application of fast pyrolysis for the valorization of three types of wastes, i.e., petroleum-based sludges and sediments, residual paints left on used/scrap metal packaging, and creosote-treated wood waste, towards high-added-value fuels, chemicals, and (bio)char. Fast pyrolysis experiments were performed on a lab-scale fixed-bed reactor for the determination of product yields, i.e., pyrolysis (bio)oil, gases, and solids (char). In addition, the composition of (bio)oil was also determined by Py/GC-MS tests. The thermal pyrolysis oil from the petroleum sludge was only 15.8 wt.% due to the remarkably high content of ash (74 wt.%) of this type of waste, in contrast to the treated wood and the residual paints (also containing 30 wt.% inorganics), which provided 46.9 wt.% and 35 wt.% pyrolysis oil, respectively. The gaseous products ranged from ~7.9 wt.% (sludge) to 14.7 (wood) and 19.2 wt.% (paints), while the respective solids (ash, char, reaction coke) values were 75.1, 35, and 36.9 wt.%. The thermal (non-catalytic) pyrolysis of residual paint contained relatively high concentrations of short acrylic aliphatic ester (i.e., n-butyl methacrylate), being valuable monomers in the polymer industry. The use of an acidic zeolitic catalyst (ZSM-5) for the in situ upgrading of the pyrolysis vapors induced changes on the product yields (decreased oil due to cracking reactions and increased gases and char/coke), but mostly on the pyrolysis oil composition. The main effect of the ZSM-5 zeolite catalyst was that, for all three organic wastes, the catalytic pyrolysis oils were enriched in the value-added mono-aromatics (BTX), especially in the case of the treated wood waste and residual paints. The non-condensable gases were mostly consisting of CO, CO2, and different amounts of C1–C4 hydrocarbons, depending on initial feed and use or not of the catalyst that increased the production of ethylene and propylene.

Details

Title
Valorization of Hazardous Organic Solid Wastes towards Fuels and Chemicals via Fast (Catalytic) Pyrolysis
Author
Rekos, Kyriazis C 1   VIAFID ORCID Logo  ; Charisteidis, Ioannis D 2 ; Tzamos, Evangelos 3   VIAFID ORCID Logo  ; Palantzas, Georgios 4   VIAFID ORCID Logo  ; Zouboulis, Anastasios I 2   VIAFID ORCID Logo  ; Triantafyllidis, Konstantinos S 1   VIAFID ORCID Logo 

 Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] (K.C.R.); [email protected] (I.D.C.); [email protected] (A.I.Z.); Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Aristotle University of Thessaloniki, 57001 Thessaloniki, Greece 
 Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] (K.C.R.); [email protected] (I.D.C.); [email protected] (A.I.Z.) 
 R & D Department, North Aegean Slops S.A., 26 Oktovriou Str. 42, 54627 Thessaloniki, Greece; [email protected] 
 Department of Civil Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] 
First page
91
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
26734079
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2642464057
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.