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Frontiers of Chemical Science and Engineering

ISSN 2095-0179

ISSN 2095-0187(Online)

CN 11-5981/TQ

Postal Subscription Code 80-969

2018 Impact Factor: 2.809

Front. Chem. Sci. Eng.    2024, Vol. 18 Issue (12) : 142    https://doi.org/10.1007/s11705-024-2493-2
Interaction and characteristics of furfural residues and polyvinyl chloride in fast co-pyrolysis
Yue Zhang1, Moshan Li1, Erfeng Hu1(), Rui Qu1, Shuai Li1, Qingang Xiong2()
1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
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Abstract

This study investigated the interaction between the furfural residue and polyvinyl chloride co-pyrolysis using an infrared heating method. Various analytical techniques including production distribution analysis, thermal behavior, pyrolysis kinetic, simulated distillation and gas chromatography-mass spectrography (GCMS), and X-ray photoelectron spectroscopy were utilized to elucidate the pyrolysis characterization and reaction mechanism during the co-pyrolysis. Initially, the yield of co-pyrolysis oil increased from 35.12% at 5 °C·s–1 to 37.70% at 10 °C·s–1, but then decreased to 32.07% at 20 °C·s–1. Kinetic and thermodynamic parameters suggested non-spontaneous and endothermic behaviors. GCMS analysis revealed that aromatic hydrocarbons, especially mono- and bi-cyclic ones, are the predominant compounds in the oil due to the presence of H radicals in polyvinyl chloride, suggesting an enhancement in oil quality. Meanwhile, the fixed chlorine content increased to 65.11% after co-pyrolysis due to the interaction between inorganic salts in furfural residues and chlorine from polyvinyl chloride.

Keywords infrared heating      pyrolysis oil      polyvinyl chloride      chlorine      co-pyrolysis     
Corresponding Author(s): Erfeng Hu,Qingang Xiong   
Just Accepted Date: 19 June 2024   Issue Date: 08 August 2024
 Cite this article:   
Yue Zhang,Moshan Li,Erfeng Hu, et al. Interaction and characteristics of furfural residues and polyvinyl chloride in fast co-pyrolysis[J]. Front. Chem. Sci. Eng., 2024, 18(12): 142.
 URL:  
https://academic.hep.com.cn/fcse/EN/10.1007/s11705-024-2493-2
https://academic.hep.com.cn/fcse/EN/Y2024/V18/I12/142
Name Proximate analysis/(wt %, ad) Ultimate analysis/(wt %, daf)
Mad Aad Vad FCa) C H Othera) N S
FR 5.63 7.4 67.42 19.55 49.4 5.2 44 0.4 0.9
PVC 0.11 0.08 94.06 5.75 39.3 5.04 55.66
Tab.1  Proximate analysis and ultimate analysis of FR and PVC
Fig.1  Schematic diagram of fixed-bed co-pyrolysis system equipped with fast infrared heating.
Fig.2  (a) TG and (b) DTG curves of FR/PVC at different heating rates (20, 30, 40 K·min–1).
Fig.3  The fitting results of (a) FWO and (b) KAS methods and (c) the variation of activation energy with conversion rates.
Fig.4  The change trend of thermodynamic parameters with conversion rate (a) A; (b) ΔH; (c) ΔG; (d) ΔS.
Fig.5  Production distribution at varying heating rates (5, 10, 15, 20 °C·s–1).
Fig.6  Gas composition variation at different heating rates (5, 10, 15, 20 °C·s–1).
Fig.7  Co-pyrolysis of (a) oil components and (b) contents of chlorinated at different heating rates (5, 10, 15, 20 °C·s–1).
Fig.8  Simulated distillation results of (a) oil and (b) main components of aromatics.
Fig.9  Cl2p XPS spectra of char from 700 °C, 10 °C·s–1, for (a) 30 min and (b) raw PVC.
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