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A thermo-kinetic investigation on the thermal degradation of polyvinyl chloride in the presence of magnetite and hematite

Altarawneh, Sanad; Al-Harahsheh, Mohammad; Buttress, Adam; Dodds, Chris; Kingman, Sam


Sanad Altarawneh

Mohammad Al-Harahsheh

Professor of Process Engineering

Pro-Vice Chancellor Faculty of Engineering


Electric arc furnace dust (EAFD) which is accumulated in large amounts world-wide contains hematite (Fe2O3) and significant quantities of magnetite (Fe3O4). Waste polyvinyl chloride (PVC) also poses a great environmental threat aside to accumulated EAFD. Both of these wastes have shown a great potential for their co-thermal treatment for metal extraction, thus minimising their environmental footprint. Herein, an investigation on the thermal degradation behaviour, reaction products, thermodynamics and the decomposition kinetics of PVC and its stoichiometric mixtures with Fe3O4 and Fe2O3 was conducted using non-isothermal thermogravimetric scans. The kinetic data suggests a significant increase in the average activation energy of PVC de-hydrochlorination from 122.6 ± 24.2 kJ/mol (pure PVC) to 177.0 ± 28.0 and 199.0 ± 77.0 kJ/mol when stoichiometric quantities of Fe3O4 and Fe2O3 were mixed with PVC. The inhibiting effect of both Fe3O4 and Fe2O3 on the degradation of PVC might be assigned to the capturing of emitted gaseous HCl which is known for its catalytic effect. This result suggests that EAFDs containing both Fe3O4 (in large amounts) and Fe2O3 can have an inhibiting effect on the de-hydrochlorination of PVC resulting in longer processing times or the requirement of higher processing temperatures for achieving reasonable reaction rates.


Altarawneh, S., Al-Harahsheh, M., Buttress, A., Dodds, C., & Kingman, S. (2022). A thermo-kinetic investigation on the thermal degradation of polyvinyl chloride in the presence of magnetite and hematite. Thermochimica Acta, 718, Article 179390.

Journal Article Type Article
Acceptance Date Nov 9, 2022
Online Publication Date Nov 11, 2022
Publication Date 2022-12
Deposit Date Nov 17, 2022
Publicly Available Date Nov 17, 2022
Journal Thermochimica Acta
Print ISSN 0040-6031
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 718
Article Number 179390
Keywords Physical and Theoretical Chemistry; Condensed Matter Physics; Instrumentation
Public URL
Publisher URL


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