Poisoning of Pt/γ-Al₂O₃ Aqueous Phase Reforming Catalysts by Ketone and Diketone-Derived Surface Species.

ABSTRACT: Strong adsorption of ketone and diketone byproducts and their fragmentation products during the aqueous phase reforming of biomass derived oxygenates is believed to be responsible for the deactivation of supported Pt catalysts. This study involves a combined experimental and theoretical approach to demonstrate the interactions of several model di/ketone poisons with Pt/γ-Al₂O₃ catalysts. Particular di/ketones were selected to reveal the effects of hydroxyl groups (acetone, hydroxyacetone), conjugation with C=C bonds (mesityl oxide), intramolecular distance between carbonyls in diketones (2,3-butanedione, 2,4-pentanedione), and length of terminal alkyl chains (3,4-hexanedione). The formation of adsorbed carbon monoxide (1900-2100 cm^-1) as a decarbonylation p

SUBMITTER: Hare BJ 

PROVIDER: S-EPMC10845116 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature