Upcycling of Polyethylene Terephthalate to High-Value Aromatics via Catalytic Pyrolysis over Zeolites

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Catalytic upcycling, a process for the valorization of plastic waste toward value-added products, has garnered attention as promising approach to management. This study investigated aromatic product distribution from thermal and catalytic fast pyrolysis PET using Py-GC-MS/FID. Thermal (550–800 °C) revealed that acetophenone increases sharply with rising temperatures, becoming dominant at 800 °C. was conducted three zeolites (HZSM-5, HBeta, HY). HBeta yielded highest benzene, while HZSM-5 exhibited total yields toluene, ethylbenzene, xylene, styrene, naphthalene. HY significantly promoted production acetophenone, new finding further by vinyl benzoate ethylene dibenzoate model compounds. A formation route proposed, involving homolysis Calkyl–O bond in PET, rearrangement, decarbonylation. Further, effects various reaction conditions, including catalyst/feedstock ratios, SiO2/Al2O3 mode operation (in situ vs ex situ), on selectivity products were systematically explored. The findings this work contribute application technology upcycling oxygen-containing organic solid waste.

Language: Английский

Improvement of engine performance, combustion and remarkable reductions in NOx, CO and unburned HC emissions fuelling with mixed plastic pyrolysis oil and oxygenated additives.

Case Studies in Chemical and Environmental Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 101203 - 101203

Published: March 1, 2025

Language: Английский

Low-temperature upcycling of waste polyethylene terephthalate into fuel additives over diffusion-enhanced hollow Ru/ZSM-5

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132971 - 132971

Published: April 1, 2025

Language: Английский