Back to Search Start Over

Kinetic investigation on the catalytic pyrolysis of plastic fractions of waste electrical and electronic equipment (WEEE): A mathematical deconvolution approach

Authors :
Gulshan, Samina
Shafaghat, Hoda
Wang, Shule
Dai, Leilei
Tang, Chuchu
Fu, Wenming
Wen, Yuming
Wang, Chi Hwa
Evangelopoulos, Panagiotis
Yang, Weihong
Gulshan, Samina
Shafaghat, Hoda
Wang, Shule
Dai, Leilei
Tang, Chuchu
Fu, Wenming
Wen, Yuming
Wang, Chi Hwa
Evangelopoulos, Panagiotis
Yang, Weihong
Publication Year :
2024

Abstract

Waste electrical and electronic equipment (WEEE) has become a critical environmental problem. Catalytic pyrolysis is an ideal technique to treat and convert the plastic fraction of WEEE into chemicals and fuels. Unfortunately, research using real WEEE remains relatively limited. Furthermore, the complexity of WEEE complicates the analysis of its pyrolytic kinetics. This study applied the Fraser-Suzuki mathematical deconvolution method to obtain the pseudo reactions of the thermal degradation of two types of WEEE, using four different catalysts (Al2O3, HBeta, HZSM-5, and TiO2) or without a catalyst. The main contributor(s) to each pseudo reaction were identified by comparing them with the pyrolysis results of the pure plastics in WEEE. The nth order model was then applied to estimate the kinetic parameters of the obtained pseudo reactions. In the low-grade electronics pyrolysis, the pseudo-1 reaction using TiO2 as a catalyst achieved the lowest activation energy of 92.10 kJ/mol, while the pseudo-2 reaction using HZSM-5 resulted in the lowest activation energy of 101.35 kJ/mol among the four catalytic cases. For medium-grade electronics, pseudo-3 and pseudo-4 were the main reactions for thermal degradation, with HZSM-5 and TiO2 yielding the lowest pyrolytic activation energies of 75.24 and 226.39 kJ/mol, respectively. This effort will play a crucial role in comprehending the pyrolysis kinetic mechanism of WEEE and propelling this technology toward a brighter future.<br />QC 20240815

Details

Database :
OAIster
Notes :
English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1457579475
Document Type :
Electronic Resource
Full Text :
https://doi.org/10.1016.j.wasman.2024.07.015