Selective Oxidation of H₂S to Elemental Sulfur over Waste PET-Derived Biochar-Supported Metal Catalysts.

ABSTRACT: The upcycling of plastic waste into high-value functional materials offers a sustainable pathway aligned with green chemistry and circular economy principles. In this study, activated carbon (aPAC) was synthesized from waste PET bottles via KOH activation and employed as a support for trivalent metal catalysts (Fe, Bi, and Ce) aimed at low-temperature catalytic oxidation of hydrogen sulfide (H₂S). Among the prepared catalysts, Fe/aPAC exhibited the most promising performance, achieving nearly complete H₂S conversion (∼95%) and a high sulfur yield (∼90%) under humid air at 30 °C. Textural and surface characterizations (X-ray diffraction, Fourier transform infrared, X-ray photoelectron spectroscopy, CO₂-temperature-programmed desorption, and scanning electron

SUBMITTER: Lin JY 

PROVIDER: S-EPMC12750196 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature