Complementary acid site mechanisms in hydrogen-free polyethylene upcycling: elucidating the distinct roles of Brønsted and Lewis sites in Ce-modified zeolites
Taeeun Kwon, J. S. PARK, Ki Hyuk Kang, Dae-Sung Jung, Wangyun Won, Insoo Ro
Abstract
Hydrogen-free upcycling of polyolefins over zeolite catalysts yields up to 88.7% naphtha. A linear structure–function relationship reveals that Brønsted acid sites promote β-scission, while strong Lewis acid sites enhance hydride abstraction.
Topics & Concepts
Lewis acids and basesBrønsted–Lowry acid–base theoryChemistryPolyethyleneHydrogenCatalysisPolymer chemistryOrganic chemistrybiodegradable polymer synthesis and propertiesPolymer crystallization and propertiesRecycling and Waste Management Techniques