Catalytic activity improves hydrodeoxygenation of bis(2-hydroxyethyl) terephthalate with ruthenium and oxides, suggesting efficient upcycling.
Polyethylene terephthalate (PET) upcycling to petrochemical feedstocks proceeded through catalytic hydrodeoxygenation (HDO) of bis(2‐hydroxyethyl) terephthalate (BHET) prepared by glycolysis of PET. TiO 2 ‐supported ruthenium catalysts produced deoxygenated compounds that included aromatic and cyclohexyl molecules. A hydrogen‐pressure‐dependent deoxygenation pathway was inferred from the detected intermediates. With iron added to Ru/TiO 2 (Ru/Fe/TiO 2 ), the carbon yield to C6–C8 deoxygenated compounds reached 61.1%. Proximity of Ru to Fe oxides depleted the electron density of Ru, adjusted its catalytic activity, and suppressed excessive hydrocracking, which preserved high yields of C6–C7 hydrocarbons.
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Lee et al. (2025) studied this question.
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