Influences and mechanisms of pyrolytic conditions on recycling BTX products from passenger car waste tires

Influences and mechanisms of pyrolytic conditions on recycling BTX products from passenger car waste tires

Copyright © 2023 Elsevier Ltd. All rights reserved.

Détails bibliographiques
Publié dans:Waste management (New York, N.Y.). - 1999. - 169(2023) vom: 01. Sept., Seite 196-207
Auteur principal: Zheng, Dahai (Auteur)
Autres auteurs: Cheng, Jie, Wang, Xingli, Yu, Gangqiang, Xu, Ruinian, Dai, Chengna, Liu, Ning, Wang, Ning, Chen, Biaohua
Format: Article en ligne
Langue:English
Publié: 2023
Accès à la collection:Waste management (New York, N.Y.)
Sujets:Journal Article BTX Pyrolysis mechanism Response surface methodology Waste tire Benzene J64922108F Xylenes Toluene 3FPU23BG52
Description
Résumé:Copyright © 2023 Elsevier Ltd. All rights reserved.
Pyrolysis is an effective method for waste tire disposal. However, it has rarely been used to recycle specific highly valuable components (such as benzene, toluene, and xylene (BTX)) from tire rubbers, owing to complicated pyrolytic reactions. This study investigated the pyrolysis process of passenger-car-waste-tires (PCWT) with the help of TG-DTG and Py-GC/MS. Based on response surface methodology (RSM), the effect of pyrolytic parameters on the yields of pyrolytic oil and BTX is evaluated. Furthermore, the BTX generation mechanisms are discussed from the perspective of aliphatic and aromatic hydrocarbon transformations. Additionally, pyrolytic conditions including temperature, rubber particle size, pressure, and gas flow rate were systemically investigated and the optimum pyrolytic condition for yield of BTX (26.5 g per 100 g tire rubber) was obtained [765 K, 0.7 mm, 0.52 MPa and 2.5 mL (g min)-1]. Therein, yield of benzene, toluene and xylene were 1.07, 5.03 and 20.40 g per 100 g tire rubber, respectively. During PCWT pyrolysis, BTX is primarily obtained via the Diels-Alder reactions of small-chain alkenes and transformations of limonene and aromatics. This study elucidates the BTX generation mechanisms during PCWT pyrolysis and clarifies the effects of varying pyrolytic conditions on BTX generation
Description:Date Completed 08.09.2023
Date Revised 08.09.2023
published: Print-Electronic
Citation Status MEDLINE
ISSN:1879-2456
DOI:10.1016/j.wasman.2023.07.001