Coupled conversion of polyethylene and carbon dioxide catalyzed by a zeolite-metal oxide system.

ABSTRACT: Zeolite-catalyzed polyethylene (PE) aromatization achieves reduction of the aromatic yield via hydrogenation and hydrogenolysis reactions. The hydrogen required for CO₂ hydrogenation can be provided by H radicals formed during aromatization. In this study, we efficiently convert PE and CO₂ into aromatics and CO using a zeolite-metal oxide catalyst (HZSM-5 + CuZnZrO_x) at 380°C and under hydrogen- and solvent-free reaction conditions. Hydrogen, derived from the aromatization of PE over HZSM-5, diffuses through the Brønsted acidic sites of the zeolite to the adjacent CuZnZrO_x, where it is captured in situ by CO₂ to produce bicarbonate and further hydrogenated to CO. This favors aromatization while inhibiting hydrogenation an

SUBMITTER: Liu Y 

PROVIDER: S-EPMC11014447 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature