Thermal degradation behaviors and evolved products analysis of polyester paint and waste enameled wires during pyrolysis

Wei Liu; Na Wang; Junwei Han; Jiaqi Xu; Zihan Li; Wenqing Qin

doi:10.1016/j.wasman.2020.04.005

Thermal degradation behaviors and evolved products analysis of polyester paint and waste enameled wires during pyrolysis

Waste Manag. 2020 Apr 15:107:82-90. doi: 10.1016/j.wasman.2020.04.005. Epub 2020 Apr 8.

Authors

Wei Liu¹, Na Wang¹, Junwei Han², Jiaqi Xu¹, Zihan Li¹, Wenqing Qin³

Affiliations

¹ Peace Building, No. 101, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
² Peace Building, No. 101, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China. Electronic address: hanjunwei2008@163.com.
³ Peace Building, No. 101, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China.

PMID: 32278219
DOI: 10.1016/j.wasman.2020.04.005

Abstract

The thermal degradation behaviors and evolved products analysis of polyester paint and waste enameled wires during pyrolysis were studied. Thermogravimetric (TG) and differential thermogravimetric (DTG) analyses were performed to investigate the mass loss characteristics. The pyrolysis solid residues generated during the process under optimal condition were detailedly analyzed by Fourier-transform infrared spectroscopy (FTIR). Meanwhile, the pyrolysis gas and oil generated were analyzed by gas chromatography-mass spectrometry (GC-MS). Kinetic analysis adopted the Ozawa-Flynn-Wall (OFW) model to confirm the reaction series by the variation pattern of activation energy. The results indicated that the pyrolysis of polyester paint and waste polyester enameled wires can be divided into three stages. The average activation energy of polyester paint and waste polyester enameled wires pyrolysis was 323.34 kJ/mol and 215.95 kJ/mol, respectively. The optimized pyrolysis temperature for polyester paint and waste polyester enameled wires was 500 °C and 900 °C, respectively. The chemical compositions of the pyrolysis residues of polyester paint and waste polyester enameled wires were basically same, mainly containing the compounds with CH, CO, aromatic ring, methyl, and aromatics bonds. The pyrolysis gas of polyester paint was mainly composed of C₂H₆, while that of waste polyester enameled wires mainly consisted of C₂H₆ and C₄H₈O. The main components of the pyrolysis oil polyester paint and waste polyester enameled wires were basically same, mainly containing long chain hydrocarbons, long chain alkenes, alcohols, phenol, ketone, aldehyde, and aromatic.

Keywords: Polyester paint; Pyrolysis; Secondary resources; Thermogravimetric analysis (TGA); Waste enameled wires.

MeSH terms

Kinetics
Paint
Polyesters*
Pyrolysis*
Thermogravimetry

Substances

Polyesters