Elucidating dechlorination of waste polyvinyl chloride under high‐temperature catalytic hydrothermal treatment

This study focused on evaluating the reduction of chlorine content in waste polyvinyl chloride (WPVC) through high‐temperature catalytic hydrothermal treatment (HTT). Catalytic HTT experiments were carried out to evaluate the effect of noble metal catalysts (Ru/C, Pt/C, and Pd/C), residence time (0....

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Bibliographic Details
Published in:AIChE journal 2024-02, Vol.70 (2), p.n/a
Main Authors: Ghalandari, Vahab, Scannell, Adam, Reza, Toufiq
Format: Article
Language:English
Subjects:
Catalysts
Chlorine
chlorine balance
Dechlorination
Environmental effects
fouling and slagging indices
heterogeneous catalysis
Hydrothermal treatment
Noble metals
Palladium
Plastic debris
Polyvinyl chloride
Solid phases
waste plastics
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Summary:This study focused on evaluating the reduction of chlorine content in waste polyvinyl chloride (WPVC) through high‐temperature catalytic hydrothermal treatment (HTT). Catalytic HTT experiments were carried out to evaluate the effect of noble metal catalysts (Ru/C, Pt/C, and Pd/C), residence time (0.5, 1, 2, and, 4 h), reaction temperature (300, 325, and 350°C), and catalyst loading (0, 5, and 10 wt%). The findings indicated that dechlorination efficiency can be achieved by 99.01% at 350°C and 1 h, with 10 wt% Pd/C loading. Based on chlorine balance, the chlorine content of the solid phase significantly decreased from 568.8 to 5.64 g kg−1 at the same condition. The catalytic HTT solid residue ash has low chlorine content under most operational conditions. These results suggest that catalytic HTT is an effective method to dechlorinate WPVC as a high‐halogenated waste plastic in order to reduce its harmful effect on the environment.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.18274