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Journal:Journal of the Energy Institute

Key Words:Co-pyrolysis; Waste biomass; Dechlorinated polyvinyl chloride; Synergistic effec

Abstract:With the combination of stepwise dechlorination and co-pyrolysis techniques, this study conducted polyvi-nyl chloride (PVC) dechlorination experiments and co-pyrolysis experiments of poplar wood (PW) with dechlorinated polyvinyl chloride (DPVC) by thermogravimetric analysis and a fixed bed reactor. Stepwise pyrolysis effectively removed Cl from PVC with a dechlorination efficiency of 99.84% at 360 °C for 30 minutes. Thermogravimetric tests and thermokinetic variables were employed to describe the co-pyrolysis process's thermodynamic behavior, where co-pyrolysis significantly diminished the activation energy of the initial pyrolysis stage (9.65-21.62 kJ/mol) and increased the reaction rate (0.02-0.09 %/°C). The synergistic effect of co-pyrolysis enhanced the yield and quality of liquid oil and reduced the solid residue rate, with the maximum change in solid residue rate (-2.36%) occurring at PW:DPVC=3:7. The optimal conditions for the synergistic effect are a raw material ratio of 3:7 at 500 °C. Co-pyrolysis efficiently reduced the content of oxygen-containing compounds of phenols, ketones, and acids in oil, and elevated the selectivity of aromat-ics. The research methods avoid the drawbacks of bio-oil and plastic oil and improve the quality of pyrolysis oil in a concise and efficient manner, which provides some new ideas for the resource and clean utilization of municipal waste.

All the Authors:Jie Zhu,Jie Geng,Jisen Liu,Kuihua Han,Yongzheng Wang,Sunwen Xia

First Author:Zihao Yang

Indexed by:Journal paper

Correspondence Author:Shengli Niu*

Discipline:Engineering

First-Level Discipline:Power Engineering and Engineering Thermophysics

Document Type:J

Volume:117

Page Number:101819

Translation or Not:no

Date of Publication:2024-09-01

Included Journals:SCI