Dechlorination of waste polyvinyl chloride (PVC) through non-thermal plasma

被引：9

作者：

Song J. ^{[1
]}

Wang J. ^{[1
]}

Sima J. ^{[1
]}

Zhu Y. ^{[1
]}

Du X. ^{[1
]}

Williams P.T. ^{[2
]}

Huang Q. ^{[1
]}

机构：

[1] State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou

[2] School of Chemical and Process Engineering, University of Leeds, Leeds

来源：

Chemosphere | 2023年 / 338卷

基金：

中国国家自然科学基金;

关键词：

Dechlorination; Hydrochloric acid; Non-thermal plasma; Plastic wastes; Polyvinyl chloride;

D O I：

10.1016/j.chemosphere.2023.139535

中图分类号：

学科分类号：

摘要：

Dechlorination is essential for the chemical recycling of waste polyvinyl chloride (PVC) plastics. This study investigated the use of non-thermal plasma (NTP) for chlorine removal, with a focus on the effects of treatment time and discharge power on dechlorination efficiency. The results showed that longer treatment times and higher discharge powers led to better dechlorination performance. The maximum efficiency (98.25%) and HCl recovery yield (55.72%) were achieved at 180 W power after 40 min of treatment where 96.44% of Cl existed in the form of HCl gas, 1.44% in the liquid product, and 2.12% in the solid residue product. NTP at a discharge power of 150 W showed better dechlorination performance compared to traditional thermal pyrolysis treatment in temperatures ranging from 200 to 400 °C. The activation energy analysis of the chlorine removal showed that compared to pyrolysis-based dechlorination (137.09 kJ/mol), NTP-based dechlorination (23.62 kJ/mol) was more easily achievable. This work presents a practical method for the dechlorination of waste PVC plastic using a novel technology without requiring additional thermal and pressure input. © 2023

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