Production of BTX via Catalytic Fast Pyrolysis of Printed Circuit Boards and Waste Tires Using Hierarchical ZSM-5 Zeolites and Biochar

The conversion of plastic wastes into benzene, toluene, and xylenes (BTX) is a promising strategy to achieve circular economy carbon neutrality. Here, the ex situ catalytic fast pyrolysis epoxy-printed circuit boards (PCBs) waste tires (WTs) was studied using hierarchical ZSM-5 zeolites biochar (BC). results show that alkali–acid treatment created micromesoporous structures with higher specific surface area, promote BTX formation. Particularly, treated 0.2 M NaOH (2MZ) resulted in yield 15.6 times larger than obtained without catalysts; correspondingly, yields phenolic brominated compounds were reduced. BC promoted depolymerization PCB pyrolyzates provided debromination efficiency 96%. combination 2MZ highest producing compounds. Sequential experiments indicated that, by effectively removing bromine, helped maintain activity 2MZ. Additionally, copyrolysis PCBs WTs an increased mitigated deactivation simultaneously. proposed advanced for environmentally friendly upcycling heteroatom-containing toward production.